Jet JFM-5 Service manual

Operating Instructions and Parts Manual
Hollow Chisel Mortiser
Model JFM-5
WMH TOOL GROUP
2420 Vantage Drive
Elgin, Illinois60123 Part No.M-708589A
Ph.:800-274-6848 Revision A 6/06
www.wmhtoolgroup.comCopyright ©WMH Tool Group

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WARRANTY AND SERVICE
WMH Tool Group, Inc., warrants every product it sells. If one of our tools needs service or repair, one of our
Authorized Service Centers located throughout the United States can give you quick service. In most cases, any of
these WMH Tool Group Authorized Service Centers can authorize warranty repair, assist you in obtaining parts, or
perform routine maintenance and major repair on your JET® tools. For the name of an Authorized Service Center in
your area call 1-800-274-6848.
MORE INFORMATION
WMH Tool Group is consistently adding new products to the line. For complete, up-to-date product information, check
with your localWMH Tool Group distributor, or visit jettools.com.
WARRANTY
JET products carry a limited warranty which varies in duration based upon the product (MW = Metalworking, WW =
Woodworking).
WHAT IS COVERED?
This warranty covers any defects in workmanship or materials subject to the exceptions stated below. Cutting tools,
abrasives and other consumables are excluded from warranty coverage.
WHO IS COVERED?
This warranty covers only the initial purchaser of the product.
WHAT IS THE PERIOD OF COVERAGE?
The general JET warranty lasts for the time period specified in the product literature of each product.
WHAT IS NOT COVERED?
Five Year Warranties do not cover woodworking (WW) products used for commercial, industrial or educational
purposes. Woodworking products with Five Year Warranties that are used for commercial, industrial or education
purposes revert to a One Year Warranty. This warranty does not cover defects due directly or indirectly to misuse,
abuse, negligence or accidents, normal wear-and-tear, improper repair or alterations, or lack of maintenance.
HOW TO GET SERVICE
The product or part must be returned for examination, postage prepaid, to a location designated by us. For the name
of the location nearest you, please call 1-800-274-6848.
You must provide proof of initial purchase date and an explanation of the complaint must accompany the
merchandise. If our inspection discloses a defect, we will repair or replace the product, or refund the purchase price,
at our option. We will return the repaired product or replacement at our expense unless it is determined by us that
there is no defect, or that the defect resulted from causes not within the scope of our warranty in which case we will,
at your direction, dispose of or return the product. In the event you choose to have the product returned, you will be
responsible for the shipping and handling costs of the return.
HOW STATE LAW APPLIES
This warranty gives you specific legal rights; you may also have other rights which vary from state to state.
LIMITATIONS ON THIS WARRANTY
WMH TOOL GROUP LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR
EACH PRODUCT. EXCEPT AS STATED HEREIN, ANY IMPLIED WARRANTIES OR MERCHANTABILITY AND
FITNESS ARE EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG THE IMPLIED
WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
WMH TOOL GROUP 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.
WMH Tool Group sells through distributors only. The specifications in WMH catalogs are given as general information
and are not binding. Members of WMH Tool Group reserve 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 WMH Tool Group.

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Table of Contents
Table of Contents....................................................................................................................................3
Warning...................................................................................................................................................4
Introduction..............................................................................................................................................6
Specifications..........................................................................................................................................6
Features and Terminology.......................................................................................................................7
Unpacking ...............................................................................................................................................8
Contents of the Shipping Container......................................................................................................8
Assembly.................................................................................................................................................9
Mounting to Stand................................................................................................................................9
Z-Axis Handle ......................................................................................................................................9
Table Handwheels..............................................................................................................................10
Wood Table........................................................................................................................................10
Work Stop..........................................................................................................................................10
Install Bushing, Chisel and Auger.......................................................................................................11
Chuck Extension Adaptor...................................................................................................................12
Tool Storage ......................................................................................................................................12
Grounding Instructions...........................................................................................................................12
Extension Cords.................................................................................................................................13
Adjustments...........................................................................................................................................14
Depth Stop.........................................................................................................................................14
X-Axis Table Stops.............................................................................................................................14
Vise....................................................................................................................................................14
Gib Adjustment...................................................................................................................................14
Operation...............................................................................................................................................15
Maintenance..........................................................................................................................................16
Sharpening Chisel and Auger.............................................................................................................16
Replacement Parts................................................................................................................................19
JFM-5 Mortiser...................................................................................................................................19
Parts List: JFM-5 Mortiser...................................................................................................................20
Stand Assembly.................................................................................................................................22
Optional Accessories..........................................................................................................................23

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Warning
1. Read and understand the entire owners 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 mortiser 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 mortiser, do not use until proper training
and knowledge have been obtained.
5. Do not use this mortiser for other than its intended use. If used for other purposes, WMH Tool Group
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 mortiser. Everyday eyeglasses
only have impact resistant lenses; they are not safety glasses.
7. Before operating this mortiser, 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
contains 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 mortiser is firmly secured to the stand or bench 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
blahblhblah
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 the chisel, auger or
other moving parts. Do not overreach or use excessive force to perform any machine operation.
24. 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.
25. Use recommended accessories; improper accessories may be hazardous.
26. Maintain tools with care. Keep chisels and augers sharp and clean for the best and safest
performance. Follow instructions for lubricating and changing accessories.
27. Make sure the workpiece is securely clamped to the table. Never use your hand to hold the work
piece.
28. Turn off the machine and disconnect from power before cleaning or changing accessories. Use a
brush or compressed air to remove chips or debris — do not use your hands.
29. Do not stand on the machine. Serious injury could occur if the machine tips over.
30. Never leave the machine running unattended. Turn of the power and do not leave the machine until it
comes to a complete stop.
31. 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 - -

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Introduction
This manual is provided by WMH Tool Group covering the safe operation and maintenance procedures
for a JET Model JFM-5 Mortiser. 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 years of trouble free 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 WMH Tool Group. WMH Tool Group can also be reached at our web site:
www.wmhtoolgroup.com.
Specifications
Model Number.................................................................................................................................JFM-5
Stock Number..............................................................................................................................708589K
Spindle Speed (RPM)........................................................................................................................1725
Chisel Capacity (in.).......................................................................................................................1/4 to 1
Chisel Shank Capacity (in.).................................................................................................. 5/8, 3/4, 1-1/8
Maximum Chisel Stroke (in.)....................................................................................................................8
Chuck Capacity (in.)..............................................................................................................................1/2
Bushing Size (dia./in.).......................................................................................................... 5/8, 3/4, 1-1/8
Chisel Center to Fence Distance (in.).......................................................................................................4
Fence Size (in.) ......................................................................................................................... 3-1/2 x 20
Base Size (in.)............................................................................................................................... 14 x 16
Maximum Table Movement:
X-Axis (in.)........................................................................................................................................16
Y-Axis (in.)..........................................................................................................................................4
Motor................................................................................... TEFC, 1HP, 1Ph, 115/230V (pre-wired 115V)
Overall Height on Base (in.)...................................................................................................................61
Shipping Weight (lbs.).......................................................................................................................290.2
Net Weight (lbs.)...............................................................................................................................267.3
The above specifications were current at the time this manual was published, but because of our policy of
continuous improvement, WMH Tool Group reserves the right to change specifications at any time and
without prior notice, without incurring obligations.

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Features and Terminology
Figure 1

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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 Mortiser
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.
Contents of the Shipping Container
Box #1:
1 Mortiser (A)
1 Z-Axis Handle (B)
1 Work Stop Assembly (C)
1 Chuck Removal Wrench (D)
2 Handwheel Handles (E)
1 Chuck Key (F)
3 Chisel Bushings, 5/8, 3/4, 1-1/8 I.D. (G)
(NOTE: one is already installed)
1 Chuck Extension Adaptor (H)
1 Wood Table (J)
2 Flat Head Screws, M6x20 (K)
1 Owner's Manual (not shown)
1 Warranty Card (not shown)
Box #2:
1 Stand (L)
1 Package of fasteners (M):
4 Hex Cap Screws, M8x45
4 Lock Washers, M8
Figure 2

9
Assembly
Tools required for assembly:
Wrenches, 10, 13 and 14mm
NOTE: A ratchet wrench with sockets may
speed assembly time
Set of hex (Allen) wrenches
Cross-point (Phillips) screwdriver
Exposed metal surfaces on the mortiser have
been factory-coated with a protectant. This
should be removed with a soft rag moistened
with kerosene or a light solvent. Do not use an
abrasive pad and do not use gasoline, paint
thinner or acetone, as these will damage plastic
components and painted surfaces.
The mortiser should be placed in a dry area with
a level floor and good lighting. Provide enough
space around the mortiser to allow for
operations and any adjustments or servicing.
Mounting to Stand
The mortiser is heavy!
Assembly to the stand requires an assistant
or a hoist.
Place the mortiser upon the stand, making sure
the front of the mortiser faces the same direction
as the door in the stand. Line up the four holes
in mortiser base and stand, and insert four M8 x
45 hex cap screws with four M8 lock washers
(see Figure 3). Tighten securely with a 13mm
wrench.
Z-Axis Handle
Screw the handle into the hole on the hub
(Figure 4). Tighten by turning a 14mm wrench
on the flats of the handle, as shown.
The hub is spring loaded and can adjust the
handle to different positions for the operator’s
convenience. Pull outward on the handle close
to the hub and rotate it into position, then
release, allowing it to drop back onto the pin.
Make sure the hub re-seats itself on the pin.
IMPORTANT: If the head will not move when
the handle is operated, the head may have been
tightened for shipping purposes. To free the
head, loosen the three hex nuts (A, Figure
5
)
with a 10mm wrench (do not remove), and then
slightly loosen the set screws within them using
a hex wrench. Caution: The head may rise
when the set screws are loosened.
Re-tighten the hex nuts (A, Figure 5) while
continuing to hold the set screws to prevent
them from turning during the tightening process.
Figure 3
Figure 4
Figure 5

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Table Handwheels
Install the two handles into the threaded holes
on the handwheels. Tighten with a 14mm
wrench on the nuts. See Figure 6.
IMPORTANT: The table has been tightened for
shipping purposes. To free the table, loosen the
six hex nuts (A, Figure 7), then slightly loosen
the six set screws inside of them. Re-tighten the
hex nuts (A, Figure 7) while continuing to hold
the set screws to prevent them from turning
during the tightening process. Do this for both x-
axis and y-axis movements of the table. The
table should be loosened just enough to move
smoothly but without binding.
The wing screws (B, Figure 7) will now be used
to lock and unlock the table movement.
Wood Table
Mount the wood table to the mortiser using the
two flat head screws (Figure 8). Make sure the
countersunk holes in the wood table are facing
up.
The fence also has two countersunk holes for
mounting an optional backing board (not
provided).
Work Stop
The work stop is useful for repetitive cuts of the
same length, and can be mounted to either end
of the fence through the holes. See Figure 8. It
is tightened into place by means of wing screws.
Figure 6
Figure 7
Figure 8

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Install Bushing, Chisel and Auger
NOTE: A chisel and auger are not provided with
your mortiser. Contact your dealer for available
chisel/auger sets from WMH Tool Group.
1. Loosen the locking screw (Figure 9).
2. Insert bushing into the hole with the
bushing’s hole facing the front toward the
locking screw (Figure 9). NOTE: The
mortiser is shipped with one of the three
bushings already installed. To remove it,
loosen the locking screw and slide out the
bushing.
3. Tighten the locking screw just enough to
hold the bushing in place.
Chisels and augers are very
sharp! Use caution when working with or
around them.
4. Place the chisel and auger beneath the
bushing and allow the auger to rest upon
the table while pushing the chisel up
through the bushing.
5. The cutting portion of the auger must clear
the chisel by an amount dependent upon
the size of chisel and the type of wood to be
worked. This is usually about 1/16” to 3/16”.
Place a spacer of the appropriate thickness
(a hex wrench of appropriate size works well
for this) between bushing and chisel, and
push chisel up until it contacts the spacer.
See Figure 9.
6. Tighten the locking screw to hold the chisel
in place, and remove the spacer.
7. Push the auger up through the chisel
opening and into the chuck as far as it will
go. Tighten the auger in the chuck by
rotating the chuck key clockwise in the
chuck.
8. Loosen the locking screw and push the
chisel all the way up until it contacts the
bushing. This should provide the proper
chisel to auger clearance. Tighten the
locking screw.
NOTE: Set the slot in the side of the chisel
to the left or right, if the cut is to be done
laterally; and front or back if the cut is to be
done front to back. The chisel slot should
always be positioned so chips are being
released into the already-cut part of the
workpiece. Refer to Figure 19.
9. Make sure the chuck and the locking screw
are tight, and close the chuck access cover.
Figure 9
The chuck access cover has been removed for
clarity. Do not operate the mortiser without cover
in place.

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Chuck Extension Adaptor
The Mortiser is supplied with a chuck intended
for use with augers having long shanks. Augers
come with long or short shanks, depending upon
the manufacturer. See Figure 10.
The chuck extension adaptor is used for
mounting a short-shank auger. Proceed as
follows (Figure 11):
1. Remove chisel and auger.
2. Hold the spindle still by inserting the chuck
key into the chuck and allowing it to wedge
against the edge of the headstock. Use the
provided chuck removal wrench to lower the
chuck release nut, which will force the chuck
off the spindle. Catch the chuck when it falls
to prevent it being damaged.
3. Return the chuck release nut to its former
high position on the spindle.
4. Push the optional adaptor onto the spindle
as shown. Then firmly push the chuck onto
the adaptor.
Tool Storage
A shelf and perforated cushion inside the
cabinet are convenient for storing the
accessories.
The chuck key can also be stored on the clips at
the rear of the mortiser column (see Figure 7).
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. The mortiser 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 connector.
Figure 10
Figure 11
The chuck access cover has been removed for
clarity. Do not operate the mortiser without cover
in place.

13
If repair or replacement of the electric cord or
plug is necessary, do not connect the
equipment-grounding conductor to a live
terminal.
Grounded, cord-connected tools intended
for use on a supply circuit having a nominal
rating less than 150 volts:
This mortiser has been pre-wired for 115 volt for
use on a circuit that has an outlet that looks like
the one illustrated in Figure 12. The tool has a
grounding plug similar to the plug illustrated in
Figure 12.
A temporary adapter, (Figure 13) may be used
to connect this plug to a 2-pole receptacle until a
properly grounded outlet can be installed by a
qualified electrician. The green-colored rigid ear,
lug, or the like, extending from the adapter must
be connected to a permanent ground such as a
properly grounded outlet box.
Grounded, cord-connected tools intended
for use on a supply circuit having a nominal
rating between 150 to 230 volts, inclusive:
If the Mortiser is to be re-wired for 230 volt
operation, it will use an outlet that looks similar
to the one in Figure 14. An appropriate 230 volt
grounding plug must be installed on the power
cord. This plug will look similar to that illustrated
in Figure 14.
Make sure outlet and plug have the same
configuration. No adapter is available or should
be used with 230 volt operation.
If the machine is to be re-wired for 230 volt
operation, consult the diagram inside the switch
box. The re-wiring should be made by qualified
service personnel, and after re-connection the
tool should comply with all local codes and
ordinances.
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.
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 undersize cord
will cause a drop in line voltage resulting in loss
of power and overheating.
The chart in Figure 15 shows the correct size
cord to use based on cord length and the amp
rating on your machine’s motor plate. If in doubt,
use the next heavier gauge. The smaller the
gauge number, the heavier the cord.
Figure 12
Figure 13
Figure 14
Recommended Gauges (AWG) of Extension Cords
Extension Cord Length *
Amps 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.
Figure 15

14
Adjustments
Depth Stop
1. Loosen the handle and move the depth stop
rod (Figure 16) up and temporarily out of the
way.
2. Lower the head until the auger reaches the
desired depth in front of the workpiece. See
Figure 16.
3. Loosen the handle and allow the depth stop
rod to lower until it contacts the casting.
Tighten the handle. The depth stop is now
set at the desired depth of cut.
NOTE: The handle on the depth stop can be
rotated to a more convenient position. Simply
pull out on the handle, rotate it on the pin, and
release, making sure it seats itself properly on
the pin.
X-Axis Table Stops
Loosen the wing screws (Figure 17) and slide
the stops to desired position. Re-tighten wing
screws.
Vise
The vise (Figures 17 and 18) holds the
workpiece against the fence. Push the handle
forward to move the jaw against the workpiece,
then further tighten by rotating the handle
clockwise. The vise has a quick release feature:
Rotate the handle about a half turn
counterclockwise, then pull the handle outward.
The vise can be swiveled for tapered
workpieces. Loosen the upper screw, and the
lower screw below the casting (A and B, Figure
18) with a 6mm hex wrench. Pivot the vise into
position, then re-tighten both screws.
If you do not wish to mar a soft workpiece, you
can mount a board to the face of the vise jaw,
using screws (not provided) through the two
holes in the jaw.
Gib Adjustment
As parts wear through long-term use, or “play”
develops in the gibs, the set screws (shown in
A, Figure 7) need to be tightened. Follow the
instructions under “Table Handwheels” for
adjusting these set screws. NOTE: Gib tightness
should be just enough to allow smooth
movement without binding.
Figure 16
Figure 17
Figure 18

15
Operation
The mortiser has a magnetic switch which is a
valuable safety feature. Should electrical power
be cut off while the machine is operating, the
magnetic switch will prevent the machine from
immediately re-starting when power is restored.
To re-start the mortiser you must press the
START button.
The following is a general procedure for
operating the mortiser:
1. Set depth stop to the required depth of cut.
2. Place workpiece on table and clamp it with
the vise. Set work stop if needed.
3. Use the handwheels to position the
workpiece below the chisel.
4. Adjust the table stops according to the
length of cut required, and tighten the wing
screws.
5. Turn on machine and feed chisel and auger
steadily into the workpiece.
IMPORTANT: The rate of feed must be fast
enough to prevent burning at the tip of the
auger, but not so fast as to cause the
machine to slow or stall. The different rates
of feed for different woods must be learned
by experience.
6. After the first cut, the workpiece is moved
along with the right handwheel for each
successive cut. The direction of movement
must allow the chips to clear freely. Move
the workpiece so that the slot in the chisel is
releasing chips into the already cut part of
the workpiece. See Figure 19.
Do not have the chisel slot
against the blind end of the mortise, as the
chips will not be able to clear the chisel. This
can cause overheating and possible
breakage of chisel or auger.
When cutting deep mortises, make the cut in
several stages of approximately 1" each, to
allow chips to clear.
To prevent breakout at the back of the
workpiece when cutting through mortises, use a
piece of scrap material under the workpiece.
Figure 19

16
Maintenance
Before doing maintenance
on the mortiser, disconnect it from the
electrical supply by pulling out the plug or
switching off the main switch. Failure to
comply may cause serious injury.
The mortiser requires only minor maintenance,
such as cleaning and lubrication and routine
adjustment and sharpening of the chisel and
auger.
Wipe down the mortiser after each use and, as
necessary, use light applications of oil or grease
to lubricate linkages, moving parts, etc.
If the power cord is worn, cut or damaged in any
way, have it replaced immediately.
Sharpening Chisel and Auger
The chisel and auger should be kept sharp for
best performance. If cutting operations require
excessive force, the chisel and/or auger are
probably dull and should be sharpened. Blunt
edges will give inaccurate mortises and can lead
to overheating and breakage of chisel or auger.
If chisel and auger are badly worn and become
difficult to sharpen, they should be replaced.
Chisel
Sharpen the chisel with a mortise chisel cutter
with the correct size pilot. (Pilot size will differ
depending on the size of your chisel). Two or
three turns of the cutter in a carpenter's brace
chuck should be enough to sharpen the chisel,
as shown in Figure 20.
Use a small, triangular, smooth file to relieve the
inner corners of the chisel (Figure 21). Remove
any burrs from the outside of the chisel with a
fine oilstone.
Auger
Sharpen the auger by using a small, smooth file,
following the original shape of the auger. File the
inside edge of the spur, the sides of the brad
point, and the cutting edge inwards toward the
flute of the auger. See Figure 22.
Do not file the outside edge of the spur as this
will affect the diameter of the auger.
Lubrication
All ball bearings are sealed. They require no
further lubrication.
Periodically grease the gears, racks, and table
pivot points with a #2 tube grease.
Periodically clean and apply grease or oil to any
Figure 20
Figure 21
Figure 22
exposed machine surfaces, such as dove-tailed
ways and slides.

17
Troubleshooting
Trouble Probable Cause Remedy
No incoming power. Verify unit is connected to power.
Fuse blown, or circuit breaker tripped. Replace fuse, or reset circuit breaker.
Cord damaged. Replace cord.
Mortiser frequently trips.
One cause of overloading trips which
is not electrical in nature is too heavy
a cut. Take a lighter cut. If this does
not solve the problem there is
probably a loose electrical lead.
Building circuit breaker trips or fuse
blows.
Verify that mortiser is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical
lead.
Loose electrical connections.
Go through all the electrical
connections on the mortiser including
motor connections, verifying the
tightness of each. Look for any signs
of electrical arcing which is a sure
indicator of loose connections or
circuit overload.
Motor failure. Have a qualified electrician or motor repair shop test the motor; repair or
replace as necessary.
Mortiser will not start/
restart or repeatedly
trips circuit breaker or
blows fuses.
Start/Stop switch failure.
If the switch is suspect, you have two
options: Have a qualified electrician
test the switch for function, or
purchase a new switch and establish
if that was the problem on changeout.
Extension cord too light or too long. Replace with adequate size and
length cord.
Auger does not come
up to speed. Low current. Contact a qualified electrician.
Stand is on uneven surface. Machine should be placed on level
floor; use shims if necessary.
Mortiser vibrates
excessively. Motor vibration; malfunction. Repair or replace motor.
Auger contacting chisel. Increase offset of auger in relation to
chisel. See page 11.
Noisy operation. Loose screws, nuts, etc. Inspect and tighten fasteners.
Chips not clearing from hole or auger. Retract auger frequently to remove
chips. Make sure chisel slot opens
toward area already cut.
Dull auger. Resharpen, or replace auger.
Workpiece burns.
Feeding auger too slowly into
workpiece. Increase feed rate.

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Trouble Probable Cause Remedy
Auger sharpened incorrectly. Resharpen auger. See page 16.
Chuck jaws not tight. Tighten chuck jaws.
Bent auger. Replace auger.
Auger wanders.
Auger or chuck not installed properly. Reinstall the chuck or auger properly.
Wood splinters on the
underside. No backing board used for through cutting. Place a scrap board underneath the workpiece to prevent splintering.
Workpiece not clamped properly,
pinching the auger. Support or clamp workpiece firmly.
Excessive feed rate. Decrease feed rate.
Auger binds in
workpiece.
Chuck jaws not tight. Tighten chuck jaws.

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Replacement Parts
To order parts or reach our service department, call 1-800-274-6848 between 7:30 a.m. and 6:00 p.m.
(CST), Monday through Friday. Having the Model Number and Serial Number of your machine available
when you call will allow us to serve you quickly and accurately.
JFM-5 Mortiser

20
Parts List: JFM-5 Mortiser
Index No. Part No. Description Size Qty
.................708589M................. Mortiser Assembly (Complete)........................... ...................................1
1...............JFM5-101................ Base.................................................................. ...................................1
2...............JFM5-102................ Middle Base....................................................... ...................................1
3...............6294126.................. Gib .................................................................... ...................................1
4...............TS-1523061............ Set Screw.......................................................... M6x20 ........................3
5...............TS-1540041............ Hex Nut............................................................. M6..............................9
6...............6294129.................. Lead Screw ....................................................... ...................................1
7...............TS-1523031............ Set Screw.......................................................... M6x10 ........................4
8...............6294131.................. Hand Wheel....................................................... ...................................1
9...............6294132.................. Shaft.................................................................. ...................................1
10.............6294133.................. Gear.................................................................. ...................................1
11.............6294134.................. C-Clip................................................................ ...................................1
12.............6294135.................. Hand Wheel....................................................... ...................................1
13.............BB-6002ZZ.............. Bearing.............................................................. 6002ZZ.......................2
14.............6294137.................. C-Clip................................................................ ...................................2
15.............TS-1503041............ Socket Head Cap Screw.................................... M6x16 ........................2
16.............6294139.................. Setting Piece..................................................... ...................................1
17.............6294140.................. Gib.................................................................... ...................................1
18.............JFM5-118................ Slide.................................................................. ...................................1
19.............TS-1523011............ Set Screw.......................................................... M6x6..........................4
20.............6294143.................. Setting Collar..................................................... ...................................2
21.............6294144.................. Setting Rod........................................................ ...................................1
22.............6294145.................. Wing Screw....................................................... M6x16........................3
23.............6294146.................. Rack.................................................................. ...................................1
24.............TS-1523071............ Set Screw.......................................................... M6x25........................6
25.............6294148.................. Rear Length Setting Rod.................................... ...................................1
26.............JFM5-126................ Length Setting Block.......................................... ...................................1
27.............6294150.................. Front Length Setting Rod................................... ...................................1
28.............6294151.................. Wooden Work Table.......................................... ...................................1
29.............TS-2286201............ Flat Head Machine Screw.................................. M6x20........................2
30.............JFM5-130................ Column.............................................................. ...................................1
31.............6294154.................. Wave Washer.................................................... ...................................2
32.............6294155.................. Gib.................................................................... ...................................1
33.............JFM5-133................ Headstock ......................................................... ...................................1
34.............6294157.................. Rack.................................................................. ...................................1
35.............TS-1503031............ Socket Head Cap Screw.................................... M6x12 ........................4
36.............JFM5-136................Left Side Cover.................................................. ...................................1
37.............JFM5-137................Right Side Cover................................................ ...................................1
38.............TS-1533042............ Pan Head Machine Screw ................................. M5x12........................4
39.............6294162.................. Gear.................................................................. ...................................1
40.............6294163.................. Collar................................................................. ...................................1
41.............6294164.................. Gear Shaft......................................................... ...................................1
42.............JFM5-142................ Handle Hub ....................................................... ...................................1
43.............6294166.................. Spring................................................................ ...................................1
44.............6294167.................. Washer.............................................................. ...................................1
45.............TS-1514021............ Flat Head Socket Screw..................................... M6x16........................2
46.............6294169.................. Handle............................................................... ...................................1
47.............6294170.................. Handle Grip....................................................... ...................................1
48.............6294171.................. Chuck ............................................................... 1/2”.............................1
49.............JFM5-149................ Motor................................................................. 1HP, 1Ph, 115/230V...1
50.............6294173.................. Switch Box......................................................... ...................................1
51.............TS-081C052............ Pan Head Machine Screw.................................. #10-24x3/4 .................2
52.............JFM5-152................ Switch................................................................ ...................................1
53 ............6294176.................. Tapping Screw................................................... #10x5/8 .....................2
54.............TS-1503051............ Socket Head Cap Screw.................................... M6x20 ........................3
55.............6294178.................. Cylinder Fitting................................................... ...................................1
56.............6294179.................. Cylinder............................................................. ...................................1