Jet 22-44 OSC Service manual

Operating Instructions and Parts Manual
Oscillating Drum Sander
Model 22-44OSC
JET
427 New Sanford Road Part No. M-659006K
LaVergne, Tennessee 37086 Revision D 03/2016
Ph.: 800-274-6848 ECR 16020409184
www.jettools.com Copyright © 2015 JET

2
Warranty and Service
JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please
contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday.
Warranty Period
The general warranty lasts for the time period specified in the literature included with your product or on the official
JET branded website.
•JET products carry a limited warranty which varies in duration based upon the product. (See chart below)
•Accessories carry a limited warranty of one year from the date of receipt.
•Consumable items are defined as expendable parts or accessories expected to become inoperable within a
reasonable amount of use and are covered by a 90 day limited warranty against manufacturer’s defects.
Who is Covered
This warranty covers only the initial purchaser of the product from the date of delivery.
What is Covered
This warranty covers any defects in workmanship or materials subject to the limitations stated below. This warranty
does not cover failures due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear,
improper repair, alterations or lack of maintenance. JET woodworking machinery is designed to be used with Wood.
Use of these machines in the processing of metal, plastics, or other materials outside recommended guidelines may
void the warranty. The exceptions are acrylics and other natural items that are made specifically for wood turning.
Warranty Limitations
Woodworking products with a Five Year Warranty that are used for commercial or industrial purposes default to a
Two Year Warranty. Please contact Technical Service at 1-800-274-6846 for further clarification.
How to Get Technical Support
Please contact Technical Service by calling 1-800-274-6846. Please note that you will be asked to provide proof
of initial purchase when calling. If a product requires further inspection, the Technical Service representative will
explain and assist with any additional action needed. JET has Authorized Service Centers located throughout the
United States. For the name of an Authorized Service Center in your area call 1-800-274-6846 or use the Service
Center Locator on the JET website.
More Information
JET is constantly adding new products. For complete, up-to-date product information, check with your local distributor
or visit the JET website.
How State Law Applies
This warranty gives you specific legal rights, subject to applicable state law.
Limitations on This Warranty
JET LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR EACH PRODUCT.
EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN
IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
JET SHALL IN NO EVENT BE LIABLE FOR DEATH, INJURIES TO PERSONS OR PROPERTY, OR FOR
INCIDENTAL, CONTINGENT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF OUR
PRODUCTS. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU.
JET sells through distributors only. The specifications listed in JET printed materials and on official JET website are
given as general information and are not binding. JET reserves the right to effect at any time, without prior notice,
those alterations to parts, fittings, and accessory equipment which they may deem necessary for any reason
whatsoever. JET®branded products are not sold in Canada by JPW Industries, Inc.
Product Listing with Warranty Period
90 Days – Parts; Consumable items
1 Year – Motors; Machine Accessories
2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories; Woodworking Machinery used
for industrial or commercial purposes
5 Year – Woodworking Machinery
Limited Lifetime – JET Parallel clamps; VOLT Series Electric Hoists; Manual Hoists; Manual Hoist
Accessories; Shop Tools; Warehouse & Dock products; Hand Tools; Air Tools
NOTE: JET is a division of JPW Industries, Inc. References in this document to JET also apply to JPW Industries,
Inc., or any of its successors in interest to the JET brand.

3
Table of Contents
Warranty and Service............................................................................................................................................2
Table of Contents..................................................................................................................................................3
Warning.................................................................................................................................................................4
Introduction ...........................................................................................................................................................6
Specifications........................................................................................................................................................6
Features and Terminology ....................................................................................................................................7
Unpacking .............................................................................................................................................................8
Shipping Contents.................................................................................................................................................8
Assembly...............................................................................................................................................................9
Stand Assembly ................................................................................................................................................9
Drum Head Installation....................................................................................................................................10
Conveyor Table Installation.............................................................................................................................10
Installing Accessories..........................................................................................................................................10
Infeed and Outfeed Tables..............................................................................................................................10
Dust Cover ......................................................................................................................................................11
Dust Collection ................................................................................................................................................11
Installing Abrasives .........................................................................................................................................11
Grounding Instructions........................................................................................................................................13
Extension Cords..............................................................................................................................................13
Operating Controls..............................................................................................................................................14
On/Off Switch (Sanding Drum)........................................................................................................................14
Switch Lockout ................................................................................................................................................14
Conveyor.........................................................................................................................................................14
Drum Height Control........................................................................................................................................14
Oscillator Switch..............................................................................................................................................14
Adjustments ........................................................................................................................................................15
Depth Gauge...................................................................................................................................................15
Conveyor Belt Tension and Tracking ..............................................................................................................15
Trackers ..........................................................................................................................................................15
Conveyor Belt Replacement............................................................................................................................16
Checking Drum Alignment...............................................................................................................................16
Fine Tuning Drum Alignment...........................................................................................................................17
Tension Roller Alignment ................................................................................................................................17
Tension Roller Pressure Adjustment...............................................................................................................18
Drum Height Control Adjustment.....................................................................................................................18
Operation ............................................................................................................................................................19
Basic Operating Procedure .............................................................................................................................19
Setting Depth of Cut........................................................................................................................................19
Establishing Proper Drum Height....................................................................................................................19
Selecting SandSmart™ Feed Rates ...............................................................................................................19
Tips for Maximum Performance......................................................................................................................20
Maintenance........................................................................................................................................................21
Tracker Kit...........................................................................................................................................................22
Abrasives ............................................................................................................................................................23
Abrasive Selection Guide................................................................................................................................23
Optional Accessories ..........................................................................................................................................24
Troubleshooting ..................................................................................................................................................24
Troubleshooting – Motor and Electrical Problems...........................................................................................24
Troubleshooting – Mechanical Problems ........................................................................................................25
Troubleshooting – Operational Problems........................................................................................................26
Replacement Parts..............................................................................................................................................26
Drum Head Assembly – Exploded View..........................................................................................................27
Drum Head Assembly – Parts List ..................................................................................................................28
Conveyor and Motor Assembly – Exploded View ...........................................................................................30
Conveyor and Motor Assembly – Parts List ....................................................................................................31
Gearbox Assembly..........................................................................................................................................32
Closed Stand Assembly..................................................................................................................................33
Infeed and Outfeed Tables..............................................................................................................................34
Wiring Diagram ...................................................................................................................................................35

4
Warning
1. Read and understand this entire manual before attempting assembly or operation.
2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with
all of these warnings may cause serious injury.
3. Replace the warning labels if they become obscured or removed.
4. This sander is designed and intended for use by properly trained and experienced personnel only. If
you are not familiar with the proper and safe operation of a sander, do not use until proper training
and knowledge have been obtained.
5. Do not use this sander for other than its intended use. If used for other purposes, JET disclaims any
real or implied warranty and holds itself harmless from any injury that may result from that use.
6. Always wear approved safety glasses/face shields while using this sander. Everyday eyeglasses only
have impact resistant lenses; they are not safety glasses.
7. Before operating this sander, remove tie, rings, watches and other jewelry, and roll sleeves up past
the elbows. Remove all loose clothing and confine long hair. Non-slip footwear or anti-skid floor strips
are recommended. Do not wear gloves.
8. Wear ear protectors (plugs or muffs) during extended periods of operation.
9. Some dust created by power sanding, sawing, grinding, drilling and other construction activities
contain chemicals known to cause cancer, birth defects or other reproductive harm. Some examples
of these chemicals are:
•Lead from lead based paint.
•Crystalline silica from bricks, cement and other masonry products.
•Arsenic and chromium from chemically treated lumber.
Your risk of exposure varies, depending on how often you do this type of work. To reduce your
exposure to these chemicals, work in a well-ventilated area and work with approved safety
equipment, such as face or dust masks that are specifically designed to filter out microscopic
particles.
10. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.
11. Make certain the switch is in the OFF position before connecting the machine to the power supply.
12. Make certain the machine is properly grounded.
13. Make all machine adjustments or maintenance with the machine unplugged from the power source.
14. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adjusting
wrenches are removed from the machine before turning it on.
15. Keep safety guards in place at all times when the machine is in use. If removed for maintenance
purposes, use extreme caution and replace the guards immediately.
16. Make sure the sander is firmly secured to the stand or work table before use.
17. Check damaged parts. Before further use of the machine, a guard or other part that is damaged
should be carefully checked to determine that it will operate properly and perform its intended
function. Check for alignment of moving parts, binding of moving parts, breakage of parts, mounting
and any other conditions that may affect its operation. A guard or other part that is damaged should
be properly repaired or replaced.
18. Provide for adequate space surrounding work area and non-glare, overhead lighting.
19. Keep the floor around the machine clean and free of scrap material, oil and grease.
20. Keep visitors a safe distance from the work area. Keep children away.

5
21. Make your workshop child proof with padlocks, master switches or by removing starter keys.
22. Give your work undivided attention. Looking around, carrying on a conversation and “horse-play” are
careless acts that can result in serious injury.
23. Maintain a balanced stance at all times so that you do not fall or lean against moving parts. Do not
overreach or use excessive force to perform any machine operation.
24. Stand to one side of the conveyor and make sure no one else is standing in line with the conveyor
while feeding into the machine. Should a part slip while being fed, it may exit the machine at a high
rate of speed and can cause injuries to anyone standing directly in front of the infeed.
25. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for
which it was not designed. The right tool will do the job better and safer.
26. Use recommended accessories; improper accessories may be hazardous.
27. Maintain tools with care. Keep abrasives clean for the best and safest performance. Follow
instructions for lubricating the machine and changing accessories.
28. Always feed stock against the rotation of the drum.
29. Keep your hands clear when feeding parts onto the conveyor. The part will be forced down as it
begins to feed, causing a pinching action between the part and the conveyor bed. Never reach into a
running machine. Turn off sander and disconnect from power before attempting to retrieve parts from
beneath the drum.
30. Turn off the machine and disconnect from power before cleaning. Use a brush or compressed air to
remove chips or debris — do not use your hands.
31. Do not stand on the machine. Serious injury could occur if the machine tips over.
32. Never leave the machine running unattended. Turn the power off and do not leave the machine until it
comes to a complete stop.
33. Remove loose items and unnecessary work pieces from the area before starting the machine.
Familiarize yourself with the following safety notices used in this manual:
This means that if precautions are not heeded, it may result in minor injury and/or
possible machine damage.
This means that if precautions are not heeded, it may result in serious injury or possibly
even death.
- - SAVE THESE INSTRUCTIONS - -

6
Introduction
This manual is provided by JET covering the safe operation and maintenance procedures for a JET
Model 22-44OSC Oscillating Drum Sander. This manual contains instructions on installation, safety
precautions, general operating procedures, maintenance instructions and parts breakdown. This machine
has been designed and constructed to provide consistent, long-term operation if used in accordance with
instructions set forth in this manual. If there are any questions or comments, please contact either your
local supplier or JET. JET can also be reached at our web site: www.jettools.com.
Specifications
Model number ...........................................................................................................................22-44OSC
Stock numbers:
Sander kit complete................................................................................................................659006K
Sander only .............................................................................................................................. 659006
Conveyor............................................................................................................................. 649003-02
Stand......................................................................................................................................659006S
Capacities:
Maximum board width (in.).................................................................................................44 (two passes)
Minimum board length (in.)................................................................................................................2-1/4
Maximum board thickness (in.)................................................................................................................4
Minimum board thickness (in.) ............................................................................................................ 1/32
Motor and Electricals:
Conveyor motor............................................ 1/30HP, 0.45A, 40 RPM, 43 inch-lb. torque, direct drive D.C.
Drum motor.....................TEFC induction, capacitor start, 1-3/4HP (1.3kW), 1PH, 115V only, 15.5A, 60Hz
Motor speed (RPM)........................................................................................................................... 1720
Drum speed (RPM)............................................................................................................................ 1700
Conveyor variable feed rate (FPM)................................................................................ 0-10 (SandSmart)
On/off switch ............................................................................................paddle style with removable key
Recommended circuit *........................................................................................................................20A
* subject to local/national electrical codes.
Main Materials:
Frame...........................................................................................................................................cast iron
Drum...........................................................................................................................aluminum extrusion
Cabinet...............................................................................................................................................steel
Dimensions:
Conveyor height from floor (in.)..............................................................................................................32
Drum size (in.)...............................................................................................................................Ø5 x 23
Dust chute (in.)........................................................................................................................................4
Cabinet height (in.)................................................................................................................................29
Overall dimensions, assembled (in.) ............................................................................... 44L x 27W x 52H
Weights:
Net (lbs.) .............................................................................................................................................336
Shipping (lbs.) .....................................................................................................................................363
The above specifications were current at the time this manual was published, but because of our policy of
continuous improvement, JET reserves the right to change specifications at any time and without prior
notice, without incurring obligations.

7
Features and Terminology
The illustration below shows the major components and features of the 22-44OSC Sander. These are
referenced throughout the manual and will help to familiarize you with the operation and functions of the
machine.
Figure 1 – Features

8
Unpacking
Open shipping container and check for shipping
damage. Report any damage immediately to
your distributor and shipping agent. Do not
discard any shipping material until the Drum
Sander is assembled and running properly.
Compare the contents of your container with the
following parts list to make sure all parts are
intact. Missing parts, if any, should be reported
to your distributor. Read the instruction manual
thoroughly for assembly, maintenance and
safety instructions.
Note: The letter designators identifying parts on
this page are used throughout the Assembly
section of this manual for reference conven-
ience.
Shipping Contents
Main Container Contents
Contents shown in Figure 1
1 Handwheel (A)
1 TufTool (B)
1 Drum Head (C)
1 Conveyor Table Assembly (D)
1 Bottom Plate (E)
2 Stand Side (F)
1 Rear Plate (G)
1 Front Plate (H)
1 Hardware Bag (see below for contents)
1 Owner's Manual (not shown)
Hardware Bag Contents
Note: The letter designators identifying parts on
this page are used throughout this manual for
reference convenience.
04 Hex Cap Screw, 3/8”x1” (J)
04 Socket Head Cap Screw, 5/16"x3/4” (K)
12 Hex Cap Screw, 5/16”x1/2” (L)
04 Flat Washer, 3/8" (M)
04 Lock Washer, 5/16” (N)
16 Flat Washer, 5/16" (P)
03 Hex Wrenches, 1/8", 4mm and 6mm (not
shown
Figure 2 – Main Container Contents
Figure 3 – Hardware Bag Contents

9
Assembly
Stand Assembly
1. Position two stand sides (F1, F2) on the
ground with the base down, about 3 feet
apart with the openings toward the center.
2. Mount the bottom plate (E) to the stand
sides with four each 5/16" hex cap screws
(L1) and 5/16" flat washers (P1). Hand-
tighten only at this time.
3. Secure the left side of the rear plate (G) to
the left stand side (F1) with two each 5/16"
hex cap screws (L2) and 5/16" flat washers
(P2). Hand-tighten only.
PPPPP
4. Secure the right side of the rear plate (G) to
the right stand side (F2) in the same manner
as above. Hand-tighten only.
5. Secure the front plate (H) to the left and right
stand sides (F1, F2) in the same manner as
above with four each 5/16" hex cap screws
(L) and 5/16" flat washers (P). Hand-tighten
only.
F 1
L 1
P 1
E
P
2
L 2
F 2
H
Base
Base
G
Figure 4

10
Drum Head Installation
Tools required for assembly:
001 Flat head screwdriver
001 Set of open-end wrenches
001 Set of Hex wrenches
001 Adjustable wrench
Referring to Figure 5:
1. Place the sander (C) onto the stand previously
assembled.
The sander is very heavy. Use a
hoist or assistance when moving to avoid injury
to self and equipment.
Align the four threaded mounting holes of the
sander base (C1) with the slotted holes on the
stand.
2. Secure the sander (C) to the stand from inside
the cabinet using four 3/8” x 1” hex cap
screws (J) and four 3/8” flat washers (M).
3. Attach the handwheel (A) to the height
adjustment screw (C2), and tighten the two set
screws with the 4mm hex wrench supplied.
After installing the drum head to the stand, finish
tightening all mounting hardware that was prev-
iously hand-tightened during the stand assembly.
Conveyor Table Installation
1. Raise the drum as far as it will go by turning the
handwheel (A) clockwise.
2. Place the conveyor (D) onto the sander
base (C1).
Align the four holes in the conveyor (D) with the
four holes in the sander base.
3. Secure the conveyor in place with four 5/16” x
3/4” socket head cap screws (K), four 5/16”
lock washers (N) and four 5/16” flat
washers (P).
4. Plug the sander's motor cord into the
receptacle of the control box (D1).
Important: The conveyor belt has been over-
tensioned for the purpose of shipping. Before
operation, adjust the belt tension (see page 15).
Installing Accessories
Infeed and Outfeed Tables
The infeed and outfeed table is an optional
accessory.
1. Bolt the base bracket (B, Fig. 6) to the sander
base with two 3/8”-16 x 1” hex head cap
screws (C) and two 3/8” flat washers (D).
Tighten the screws.
Figure 5
Figure 6
2. Mount the table (A) to the base bracket (B) with
four 1/4"-20 x 3/4" carriage bolts (E), four 1/4"
flat washers (F) and four 1/4" hex nuts (G).
Note: Leave the carriage bolts loose for now.
3. Place a straight edge on the conveyor bed and
extending out over the extension table. Raise
or lower the extension table until it is level with,
or slightly below, the surface of the conveyor
belt. Tighten the hex nuts (G).
4. Repeat for the other table.

11
Dust Cover
To open the dust cover, push in on the knob
(A, Fig. 7) and lift. The latch can be adjusted using
the screw behind it.
Dust Collection
Dust collection is mandatory for a safe work
environment and extended abrasive life. The
22-44OSC is equipped with a 4” dust collection port
at the top of the dust cover. It is designed to be
used with standard 4” dust collection hose
(B, Fig. 7) connected to a high volume dust
collector (minimum 500 CFM) as shown.
JET offers a variety of Dust Collectors and Air
Filtration Units. Contact your local distributor for
more information.
Installing Abrasives
An 80-grit, 3-1/8” wide abrasive strip is already
installed on the drum of your sander.
Proper attachment of the abrasive strip to the drum
is critical to achieving top performance from your
drum sander. Abrasive strips do not have to be pre-
measured. The end of the roll is first tapered and
attached to the left (outboard) side of the drum.
Then the strip is wrapped around the drum, and the
second taper is made for attachment to the right
(inboard) side of the drum.
Note: You can use the original abrasive strip
mounted to the drum as a template for cutting your
own strips.
1. Mark and cut a taper at one end of the roll as
shown in Figure 8. Because the tapered end
should use all of the left (outboard) slot width,
its end must be trimmed back as shown.
2. Raise the fastener lever (D, Fig. 9) on the
outboard end of drum, and insert the tapered
end of the abrasive (E, Fig. 9) so that it uses
most of the width of the slot. Release the
fastener lever to securely hold the strip end to
the fastener.
3. Begin wrapping the strip around the drum. The
tapered edge of the strip end should follow the
edge of the drum.
4. Continue to wrap the abrasive in a spiral
fashion by rotating the drum with one hand and
guiding the strip with the other (Figure 10).
Successive windings of the strip should be
flush with previous windings without any
overlap.
Figure 7
Figure 8
Figure 9
Figure 10

12
5. Mark the trailing end of the strip where it
crosses the right (inboard) end of the drum
(Figure 11).
6. Remove the abrasive strip from the drum, and
cut a taper as was done with the starting edge
(see Figure 8). Note: The taper on the
remaining roll can be used as the taper for the
starting edge of the next strip to be cut.
7. Rewrap the drum beginning at the left, as
described in steps 2 through 4.
8. You can use your fingers to work the infeed
take-up fastener, but it will be more convenient
to use the TUFTool supplied with your sander.
Hold the TUFTool with the red end pointing
away from you (Figure 12) and insert its hook
into the outside hole of the fastener lever (see
Figure 14).
9. Lift the lever with the TUFTool, pulling the lever
up until it touches the inside of the drum.
10. Turn the TUFTool counterclockwise and lower
it onto the abrasive strip, making sure it is
holding the paper tight (Figure 13).
11. Insert the tapered end of the abrasive strip into
the slot and fastener. It may be necessary to
trim the tapered end of the abrasive strip so
that it does not “bottom out” against the inside
of the drum.
IMPORTANT: Leave a gap – at least 1/8” –
between the tapered strip and the closed end
of the slot (Figure 13) to allow strip to be pulled
into the fastener as needed. If necessary, trim
the outside edge of the abrasive strip.
12. Hold the abrasive in place with your left hand,
lift up the TUFTool and turn it clockwise while
maintaining upward pressure. Slowly move the
TUFTool away from you slightly, then down,
while easing it out of the hole. This releases the
lever in its proper position (Figure 14).
All abrasive strips will stretch in use and may
stretch enough to allow the take-up lever to reach
its lowest position so that it cannot maintain tension
on the strip. If this occurs, follow the above
procedures to re-set the take-up lever.
Always remove TUFTool from machine before
operating.
Figure 11
Figure 12
Figure 13
Figure 14

13
Grounding Instructions
Electrical connections must
be made by a qualified electrician in
compliance with all relevant codes. This
machine must be properly grounded to help
prevent electrical shock and possible fatal
injury.
In the event of a malfunction or breakdown,
grounding provides a path of least resistance for
electric current to reduce the risk of electric
shock. This tool is equipped with an electric cord
having an equipment-grounding conductor and a
grounding plug. The plug must be inserted into a
matching outlet that is properly installed and
grounded in accordance with all local codes and
ordinances.
Do not modify the plug provided. If it will not fit
the outlet, have the proper outlet installed by a
qualified electrician.
Improper connection of the equipment-
grounding conductor can result in a risk of
electric shock. The conductor, with insulation
having an outer surface that is green with or
without yellow stripes, is the equipment-
grounding conductor. If repair or replacement of
the electric cord or plug is necessary, do not
connect the equipment-grounding conductor to a
live terminal.
Check with a qualified electrician or service
personnel if the grounding instructions are not
completely understood, or if in doubt as to
whether the tool is properly grounded. Use only
three wire extension cords that have three-prong
grounding plugs and three-pole receptacles that
accept the tool’s plug.
Repair or replace a damaged or worn cord
immediately.
As received from the factory, your drum sander
is intended for use on a 20 amp, 110V dedicated
circuit, which has an outlet and a plug that look
like the ones illustrated in Figure 15. The sander
cannot be rewired to voltages other than factory
settings.
A temporary adapter, which looks like the
adapter illustrated in Figure 16, may be used to
connect this plug to a two-pole receptacle, as
shown in Figure 16, if a properly grounded outlet
is not available. The temporary adapter should
only be used until a properly grounded outlet
can be installed by a qualified electrician. This
adapter is not applicable in Canada. The
green colored rigid ear, lug, or tab, extending
from the adapter, must be connected to a
permanent ground such as a properly grounded
outlet box, as shown in Figure 16.
Extension Cords
If an extension cord is necessary, make sure the
cord rating is suitable for the amperage listed on
the machine's motor plate. An undersized cord
will cause a drop in line voltage resulting in loss
of power and overheating.
Table 1 shows the correct size cord to use
based on cord length and motor plate amp
rating. If in doubt, use the next heavier gauge.
The smaller the gauge number, the heavier the
cord.
Figure 15
Figure 16
Recommended Gauges (AWG) of Extension Cords
Amps
Extension Cord Length *
25
feet 50 feet 75 feet 100 feet 150 feet 200 feet
< 5 16 16 16 14 12 12
5 to 8 16 16 14 12 10 NR
8 to 12 14 14 12 10 NR NR
12 to 15 12 12 10 10 NR NR
15 to 20 10 10 10 NR NR NR
21 to 30 10 NR NR NR NR NR
*based on limiting the line voltage drop to 5V at 150% of the
rated amperes.
NR: Not Recommended. Table 1

14
Operating Controls
On/Off Switch (Sanding Drum)
To start the sander, pull switch (A, Fig. 17) out. To
stop the sander, push switch in. This switch
operates the sanding drum only. The conveyor is
controlled separately.
Switch Lockout
For safety and to prevent unauthorized use of the
sander, pull out the key (B, Fig. 17). Press switch
(A, Fig. 17) to OFF position before removing the
key. When the key is removed, the drum cannot be
started.
Note: The conveyor belt can still run when the key
is removed).
To replace the key, slide it back into the switch until
it snaps.
Conveyor
The conveyor speed is contolled by the conveyor
speed rate control knob (E, Fig. 18) which sets the
conveyor speed from stopped (knob fully
counterclockwise) to 10fpm (knob fully clockwise).
Drum Height Control
Drum height is controlled by the height adjustment
handwheel. Rotating the handwheel counter-
clockwise lowers the drum; clockwise raises it.
One revolution of the handwheel moves the drum
approximately 1/16”.
Oscillator Switch
Referring to Figure 18:
The 22-44OSC sander can be operated as a
simple sander or as an oscillating sander.
When operating as a linear sander, the sander
drum rotates as the conveyor slides the workpiece
through. When in the oscillating mode, in addition
to the operation described, the sander drum head
oscillates from left to right as shown in Figure 18.
For linear sanding mode:
1. Sander must be turned off.
2. Pull the oscillator switch (A) OUT.
Note: Before pulling the oscillator switch out for
linear sanding mode, turn the oscillator switch to
manually position the sanding drum to center or
where otherwise desired.
3. Turn machine on.
Figure 17
Figure 18
For oscillating sanding mode:
1. Sander must be turned off.
2. Press oscillator switch (A) IN and at the same
time rotate the switch (either direction) until the
pins (B) protruding from the oscillator switch
shaft engage in the detent (C) of the pulley
base.
3. Turn the feed rate control knob (E) fully
clockwise.
Note: The feed rate must be set to maximum
when in the oscillation mode.
4. Turn the machine on.

15
Adjustments
Depth Gauge
The depth gauge indicates the distance between
the bottom of the sanding drum and the top of
the conveyor surface. Adjustment is performed
by “zeroing” the gauge.
1. Loosen screw (A, Figure 19) sufficiently to
allow the pointer (B) to be turned to depth
gauge scale.
2. With an abrasive strip on the drum, lower
sanding drum to where it touches top of
conveyor belt.
3. At this drum position, the depth gauge
pointer (B) should align with the zero mark
of the scale. If it does not, loosen screw (A)
and raise or lower pointer to align with zero
on the scale.
4. Re-tighten screw (A).
Note: Depending on the desired accuracy, you
may need to repeat this process when installing
different abrasive grits.
Figure 19
Conveyor Belt Tension and Tracking
Conveyor belt tension adjustment may be
necessary during the break-in period to
compensate for belt stretching.
IMPORTANT: The conveyor belt has been over-
tensioned for the purpose of shipping. Before
operating the sander, adjust the belt tension
according to the following instructions!
Tension. To adjust the tension of the conveyor
belt, first adjust the take-up screw nut (A, Figure
20) using the attached wrench (B, Figure 20).
Do this on both sides of the conveyor to obtain
approximately equal tension on both sides of the
belt when taut. Insufficient belt tension will cause
slippage of conveyor belt on the drive roller
during sanding operation; the conveyor belt is
too loose if it can be stopped by hand pressure
applied directly to the top of the conveyor belt.
Excessive belt tension can result in bent rollers,
bent brackets, and/or premature wearing of the
bushings or belt.
Tracking. Belt tracking adjustments are made
while the conveyor belt is running. After the
proper belt tension is obtained (see above), turn
the conveyor on and set it at the fastest speed
setting. Watch for a tendency of the conveyor
belt to drift to one side of the conveyor. To
adjust tracking, tighten the take-up screw nut on
the side toward which the belt is drifting, and
loosen the take-up screw nut on the opposite
side an equal amount.
Adjusting the take-up screw nuts on either side
of the conveyor allows belt tracking adjustments
to be made without affecting belt tension.
Note: Adjust take-up screw nuts only 1/4 turn at
a time. Then allow time for the belt to react to
the adjustments before proceeding further. Try
to avoid over adjustments.
Figure 20
Trackers
The sander comes equipped with “Trackers”,
ceramic guides that reduce the amount of
adjustments needed to keep the conveyor belt
tracked (centered) on the conveyor bed. These
guides have a magnetic backing to keep them in
place. If a Tracker wears through, it can be
reversed by turning it over. The Tracker Kit
section on Page 22 contains more information
about re-setting trackers.

16
Conveyor Belt Replacement
1. Unplug the machine from the wall
receptacle, and unplug the motor cord from
the control box receptacle.
2. Raise drum to its highest position using the
handwheel.
3. Loosen the conveyor take-up screw nuts
(A, Fig. 20) to relieve belt tension, and slide
the driven roller fully inward.
4. Remove the four bolts that attach the
conveyor table to the base. Lift up the
conveyor table and remove it from machine.
Avoid tearing the belt on any edges
underneath the conveyor bed.
5. Install new belt, and re-install conveyor
table. Take care not to damage the
Trackers. Tension and track the new belt.
Note: If the conveyor belt continually tracks to
one side of the machine, reversing the belt on
the conveyor bed may remedy the problem. To
make sure the conveyor bed is not twisted,
place a level on the conveyor bed. Level the
machine if needed. If there is still a problem,
proceed with the steps below:
Step 1: Check the conveyor drive roller and the
driven roller to make sure they are parallel to the
surface of the conveyor bed. To do this, first
center the conveyor belt on the bed. Then lay a
straight-edge on the exposed edge of the
conveyor bed on the left (outboard) side,
extending it over the roller. Note the distance
between the roller and the straightedge.
Step 2: Now repeat Step 1 on the right (inboard)
side of conveyor. Compare the measurements
from side to side. If they are not equal, loosen
one of the brackets that hold the roller in place.
Tip this bracket until the distance between the
roller and the straight-edge are equal from side
to side, then tighten the bracket.
Checking Drum Alignment
The sanding drum must be aligned parallel to
the conveyor bed for proper machine operation.
The sanding drum comes preset from the
factory. If a problem with the drum alignment
occurs, follow the instructions below.
First inspect the alignment with a gauge of some
kind. The following procedure uses a steel
straight edge as a gauge.
1. Unplug sander from power source.
2. Open the dust cover and remove the
abrasive strip from the drum.
3. Insert gauge between the drum and con-
veyor bed at the outer end of the drum
(Figure 21).
Figure 21
With the dust cover open, lower sanding
drum while slowly rotating drum by hand
until the drum lightly contacts the thickness
gauge.
4. Remove thickness gauge and place under
drum at the other end.
5. If the drum does not contact the thickness
gauge to the same degree as the opposite
end of the drum, alignment is necessary.
To align the drum:
6. Loosen the four 3/8” hex cap screws – two
front, two rear (A, Fig. 22). This allows the
entire drum carriage and shroud to be
pivoted on two screws – one screw in front,
one in back.
7. Lay the thickness gauge under the drum
lengthwise. See Figure 23. Rotate the fine
tune adjustment knob (B, Fig. 22) until the
drum contacts the gauge equally along its
entire surface. Rotate the knob clockwise to
raise the outboard end of the drum,
counterclockwise to lower the outboard end
of the drum. Use the height adjustment
handwheel to raise or lower the entire drum.
8. When drum is parallel to conveyor, tighten
the four screws (A, Fig. 22).
Conveyor table removed for clarity
Figure 22

17
Fine Tuning Drum Alignment
Note: This is an operational test. Perform this
alignment after you have become familiar with
sander operation.
When sanding boards wider than the drum,
drum alignment is critical and must be adjusted
exactly level to slightly higher on the outboard
end. This will prevent any ridges from
developing in the stock. Always check this on a
piece of scrap wood, as follows, before sanding
the work piece.
1. Run a piece of scrap wood approximately 6”
wide by 30” to 40” long through the sander
sideways so that the end of the board
extends past the end of the drum.
2. Without changing drum height, rotate the
board 180° and sand the same side.
3. If a ridge is visible where the drum overlaps,
loosen the four screws (A, Fig. 22) and raise
the outboard end of the drum by turning the
fine tune adjustment knob (B, Figure 22)
slightly clockwise.
Important: Only turn fine tune adjustment knob
when all four screws (A, Fig. 22) are loose.
4. Repeat this process until the ridge is
eliminated and the entire board is sanded.
5. Tighten the four screws (A, Fig. 23).
Note: Keep track of how many revolutions of the
fine tune knob are needed to change drum
alignment for wider (over 22”) sanding. When
sanding narrow stock (less than 22”) loosen the
four screws (Figure 22) and turn fine tune
adjustment knob counterclockwise the same
amount as the initial wide sanding so that drum
is again parallel.
Figure 23
Tension Roller Alignment
The infeed and outfeed rollers are tensioned to
provide downward pressure on the workpiece to
prevent slippage on the feed conveyor. Tension
rollers are set at the factory, but should be
inspected and may require adjustment as the
sander receives use.
Improperly adjusted tension
rollers (i.e. those set too high, rendering
them non-functional) could allow kick-back
of pieces being sanded.
1. Unplug sander from power source and
remove abrasive (D, Figure 24) from drum.
2. Loosen all four hex nuts on the bearing bolts
(E, Figure 24). This will allow both tension
rollers to drop to their lowest position.
(NOTE: Figure 24 only shows outboard end
of drum. Adjustments must be made on both
ends of drum.)
3. Lower sanding drum to where it just contacts
the conveyor bed. Then raise the sanding
drum by making 3/4 turn of the height
adjustment handle.
4. Tighten the four hex nuts (E, Figure 24).
Both tension rollers are now positioned
about 1/16” below the bottom of the sanding
drum.
Figure 24

18
Tension Roller Pressure Adjustment
You can increase or decrease tension roller
pressure by turning the screws on the tension
roller brackets (Figure 25).
Figure 25
Too much tension roller pressure can result in a
“snipe” mark, which is identified as a visible line
running across the width of the board and
located approximately 2-1/4” from the end of the
board.
If the snipe occurs on the leading end of the
board, adjust the outfeed tension roller. If the
snipe occurs on the trailing end of the board,
adjust the infeed tension roller.
Tension roller pressure can also be adjusted by
raising the height of the rollers, as follows:
1. Repeat “Tension Roller Alignment” except
raise the sanding drum only 1/4 turn of the
height adjustment handle.
2. If both tension rollers are causing snipe then
tighten all four hex nuts (E, Fig. 24) at this
position.
3. If only outfeed tension roller causes snipe,
only tighten rear (outfeed) hex nuts on each
end of drum at this position, then raise
sanding drum another 3/4 turn of the handle.
4. Press infeed tension roller down to rest on
conveyor bed and tighten front (infeed) hex
nuts at this position.
This process sets the tension roller assembly at
an angle providing less tension pressure on the
outfeed roller.
Drum Height Control Adjustment
If the height control mechanism does not
operate easily or smoothly or there is excessive
vertical movement or deflection of the drum
carriage, perform the following adjustments.
1. Tighten all four lock nuts (A, Fig. 26) and
then loosen them 1/8 to 1/4 turn. If the lock
nuts are set too tight, height control will not
operate easily. If the lock nuts are too loose,
excessive deflection of the outboard end of
the drum carriage will result.
2. Thoroughly lubricate the mating surfaces of
the motor mount slide (B, Fig. 26), and the
height adjustment screw (C, Fig. 26).
Figure 26

19
Operation
Before using your drum sander, review the
previous pages in this manual on initial set-up
and adjustment. In this section, you will learn
how to operate the machine. Make sure an
abrasive strip is mounted and a proper dust
collection system is connected.
Basic Operating Procedure
1. Set depth of cut.
2. Start dust collection system.
3. Select linear or oscillating sanding mode.
4. Start drum.
5. Start conveyor and select feed rate. If
oscillator is engaged, set feed rate to
maximum speed.
6. Feed stock through machine.
To feed stock through the sander, rest and hold
the board to be sanded on the conveyor belt,
allowing the conveyor belt to carry the board into
the drum. Once the stock is halfway through,
reposition yourself to the outfeed side of the
machine to receive and control the board as it
exits.
Setting Depth of Cut
Adjusting the drum sander for the proper contact
between the abrasive and the stock determines
the depth of cut. The depth of cut is controlled
by the height adjustment handwheel.
It may take some experimentation to determine
the proper depth of cut, given the variables of
abrasive grit, type of wood, and feed rate. For
best results, use scrap wood to practice sanding
and to develop skill and familiarity with the
machine before doing finish work.
A combination of several variables will
determine the proper depth of cut to use,
including the following:
1. Abrasive type and grit size.
2. Width of the piece being processed.
3. Hardness of the piece.
4. Feed rate of the conveyor belt.
Establishing Proper Drum Height
A good rule of thumb when sanding with grits
finer than 80 is to place the stock to be sanded
under the drum and lower drum until it contacts
the stock. Drum should still rotate by hand.
Without changing drum height, finish feeding
the stock under the sander.
Start sanding drum and sand the stock at that
same position.
Do not start drum while in
contact with stock!
For sanding with grits coarser than 80, you can
lower the drum slightly.
Always maintain control of stock. Through
practice you will learn the proper depth of cut
considering the variables above.
Selecting SandSmart™ Feed Rates
A faster feed rate allows faster sanding but
fewer revolutions of the drum per inch of
sanding. A slower feed rate provides more
revolutions of the drum per inch of sanding to
allow a greater depth of cut and smooth
sanding.
Note: If sanding with the oscillator engaged, the
feed rate must be set to maximum speed.
Begin experimenting with the feed rate set at
about 40% to 50% of maximum. The best feed
rate will depend on a number of factors,
including type of stock, grit and depth of cut
used, and whether the stock is fed directly in line
with the conveyor bed or at an angle. If the drum
motor is lugging down, if the conveyor belt is
slipping, or if you observe a ripple effect on the
stock, slow down the feed rate. If the finish is
smooth and the machine is not overworking, you
can experiment using a faster feed rate.
The SandSmart control continuously monitors
the load on the drum motor, and automatically
regulates the speed of the conveyor motor to
maintain the highest feed rate without overload.
If the load on the drum motor increases, the
SandSmart control will decrease the conveyor
feed rate and will stop the conveyor under
extreme conditions. If the load on the drum
decreases, SandSmart will increase the feed
rate but will not increase it faster than the
manual setting on the speed adjustment label.
Figure 27

20
The best and most consistent finish will be
achieved if the conveyor does not change speed
during operation. When the red indicator light
(B, Fig. 27) comes on, the SandSmart control
has detected too great a depth of cut and/or too
fast a feed rate.
This change in conveyor speed may affect the
finish surface. If the finish is affected, make
another sanding pass without changing any
settings. If the finish is still affected, make
adjustments by slowing the conveyor and/or
decreasing the depth of cut and run the stock
through again.
Also try a faster feed rate or less depth of cut if
the stock you are working begins to show burn
marks. With cherry, hard maple or other
hardwoods, using a shallower depth of cut and a
faster feed rate will help minimize burn marks.
Slightly angling the stock as it is fed into the
machine will also help prevent burning the stock.
Because of the wide range of variables, it is
important to experiment with your specific
conditions and make adjustments to achieve the
optimum feed rate. If problems occur, first check
and adjust the feed rate, referring to the
“Troubleshooting” sections in this manual.
Tips for Maximum Performance
The versatility designed into the 22-44OSC
drum sander allows it to be used for a wide
variety of tasks that will boost the return on your
investment. For example, its capabilities range
from taking the place of a planer to thickness
rough stock, to speeding up fine sanding work
often done with slower, dust-generating hand
sanders.
Learning how to use its adjustments and
controls will allow you to fine-tune the machine
for maximum results. The best results come
from experimenting with different abrasive grits
and machine adjustments to fit the job at hand.
Following is a list of useful tips which can help
you improve performance of your sander.
Dust Collection
When connecting dust collectors, remember that
straight pipe will not restrict airflow as much as
flexible tubing. Y’s and elbows will restrict airflow
less than T’s. Also, a hose smaller than 2-1/2”
diameter should not be used.
Multiple-Piece Sanding Runs
When abrasive planing (or thickness sanding) a
run of similar pieces that you want to have the
same thickness, it is best to determine the
thickness of the thinnest piece and process all
pieces to that same thickness in one session. Be
aware that the sander will remove cups and
crowns in the workpiece; consider this when
measuring and processing stock to the same
thickness.
Sanding Multiple Pieces At Once
When sanding multiple pieces simultaneously,
make sure to stagger (step) the pieces across
the width of the conveyor belt. This provides
better contact with the tension rollers. Try to
process only multiple pieces of similar thickness.
If there is a significant thickness difference, the
thinner pieces can slip on the conveyor belt if
they do not contact the tension rollers. Also note
that pieces thicker than 3/4” should be longer
than the minimum normally recommended to
prevent tipping of the stock.
Edge Sanding
When edge sanding, the sander will mimic the
opposite edge of the stock which is lying on the
conveyor belt. Because of this, it is important for
the stock edge to have been ripped at the proper
angle to the face before the sanding process.
When edge sanding stock that is less than 3/4”
wide or more than 2” high, it is good procedure
to stack and clamp several pieces together to
prevent them from slipping or tipping on the
conveyor belt.
Sanding Imperfect Stock
When sanding stock with a cup or crown, place
the crown up. This will stabilize the stock to help
prevent tipping or rocking during sanding. After
the crown has been removed and the top is flat,
turn the stock over and sand the opposite side.
To avoid personal injury, take special care when
sanding stock that is twisted, bowed, or
otherwise varies in thickness from end to end. If
possible, support such stock as it is being
sanded to keep it from slipping or tipping. Use
extra roller stands, help from another person, or
hand pressure on the stock, to minimize
potentially hazardous situations.
Face Frames and Raised Panel Doors
It is very important to have the proper abrasive
contact when doing this type of sanding. If the
machine is set to take an excessive depth of cut,
the result can be a gouge or dip as the drum
goes from sanding the rails at full width to
sanding just a few inches of width on the stiles.
To prevent this make sure, when using
abrasives finer than 80 grit, that the drum is in
contact with the wood but can still be spun by
hand. If there is room, angling the stock on the
conveyor belt can also help. Slowing the
conveyor feed when coming to a rail in the stock
can help prevent a dip or gouge. This allows the
abrasive to work the wider width with less effort,
and to achieve better consistency of the finished
surface.