Rikon Power Tools 50-120 User manual

Owner’s Manual
For more information:
www.rikontools.com or [email protected]
For Parts or Questions:
[email protected] or 877-884-5167
Record the serial number and date of purchase
in your manual for future reference.
Serial number:
Date of purchase:
Part # 50-120M2
6” X 48”Belt & 10”Disc Sander
Model: 50-120

IMPORTANT! Safety is the single most important consideration in the operation of this equipment. The
following instructions must be followed at all times.
There are certain applications for which this tool was designed. We strongly recommend that this tool not
be modified and/or used for any other application other than that for which it was designed. If you have
any questions about its application, do not use the tool until you have contacted us and we have advised
you.
General Safety Warnings
KNOW YOUR POWER TOOL. Read the owner’s manual carefully. Learn the tool’s
applications, work capabilities, and its specific potential hazards.
ALWAYS KEEP VISITORS AWAY FROM RUNNING MACHINES.
All visitors should be kept a safe distance from the work area.
ALWAYS MAKE THE WORKSHOP CHILDPROOF.
Childproof with padlocks, master switches, or by removing starter keys.
NEVER OPERATE A TOOL WHILE UNDER THE INFLUENCE OF DRUGS,
MEDICATION, OR ALCOHOL.
ALWAYS WEAR PROPER APPAREL.
Never wear loose clothing or jewelry that might get caught in moving parts. Rubber-soled footwear is
recommended for the best footing.
ALWAYS USE SAFETY GLASSES AND WEAR HEARING PROTECTION.
Also use a face or dust mask if the cutting operation is dusty.
NEVER OVERREACH.
Keep your proper footing and balance at all times.
ALWAYS GROUND ALL TOOLS.
If your tool is equipped with a three-pronged plug, you must plug it into a three-hole electric
receptacle. If you use an adapter to accommodate a two-pronged receptacle, you must attach the
adapter plug to a known ground. Never remove the third prong of the plug.
ALWAYS AVOID DANGEROUS ENVIRONMENTS.
Never use power tools in damp or wet locations. Keep your work area well lighted and clear of clutter.
ALWAYS REMOVE THE ADJUSTING KEYS AND WRENCHES FROM TOOLS AFTER USE.
Form the habit of checking to see that keys and adjusting wrenches are removed from the tool before
turning it on.
ALWAYS KEEP YOUR WORK AREA CLEAN. Cluttered areas and benches invite accidents.
NEVER STAND ON TOOLS.
Serious injury could occur if the tool is tipped or if the cutting tool is accidentally contacted.
2
Operator Safety: Required Reading

Special Safety Rules For Belt & Disc Sanders
SAVE THESE INSTRUCTIONS.
Refer to them often.
3
1. Do not operate this machine until you have read all of the following instructions.
2. Do not attempt to operate this machine until it is completely assembled.
3. Do not turn ON this machine if any pieces are missing.
4. If you are not familiar with the operation of the machine, obtain assistance from a qualified person.
5. It is highly recommended that this machine be firmly mounted to a flat and secure work surface or
stand.
6. Always wear protective eyewear prior to operating this machine.
7. Do not operate this machine if you are under the influence of drugs and/or alcohol.
8. Remove all jewelry prior to operating this machine.
9. Do not wear any gloves while operating this machine.
10.Always make sure the power switch is in the OFF position prior to plugging in the machine.
11. Always make sure the power switch is in the OFF position when doing any assembly or setup
operation.
12. Always wear a dust mask and use adequate dust collection and proper ventilation. Use of sanders
can produce harmful particles while sanding certain types of woods.
13. The use of any accessories or attachments not recommended may cause injury to you and
damage your machine.
14. This machine must be properly grounded.
15. Abrasive discs and belts should be the recommended width and length of the manufacturer.
16. Always keep your face and hands clear of moving parts such as belts and pulleys.
17.Keep power supply cords free of moving parts of the sander. Damaged cords can result in electric
shock.
18. Maintain a 1/16” clearance between the sanding disc, sanding belt and tables.
19.Always support the workpiece with the table or backstop.
20.Remove material or debris from the work area. Keep work area neat and clean.
21.Keep these instructions for future reference.
ALWAYS CHECK FOR DAMAGED PARTS.
Before initial or continual use of the tool, a guard or other part that is damaged should be checked to
assure 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 damaged parts should immediately be properly repaired or replaced.
ALWAYS DISCONNECT TOOLS.
Disconnect tools before servicing and when changing accessories such as blades, bits, and cutters.
ALWAYS AVOID ACCIDENTAL STARTING.
Make sure switch is in “OFF” position before plugging in cord.
NEVER LEAVE TOOLS RUNNING UNATTENDED.

4
Table of Contents
Specifications
6”x48”
2030 SFPM
10”
1720 SFPM
4” x 8”
0-90 o
0-45 o
3/4 HP
10A
110V
104 lbs
Belt Size
Belt Speed
Disc Size
Disc Speed
Table Size
Belt Table Tilt
Disc Table Tilt
Motor
Amps
Volts
Net weight
Safety Warnings..................................................................................................................................2-3
Sander Safety Rules ..........................................................................................................................3
Specifications ........................................................................................................................................4
Contents of Package ............................................................................................................................................5
Assembly ...........................................................................................................................6-8
Electrical Requirements ...........................................................................................................................................9
Operation............................................................................................................10-11
Maintenance ...................................................................................................................................12
Changing the Motor Belt............................................................................................................................12
Trouble Shooting...............................................................................................................................................13
Wiring Diagram.................................................................................................................................13
Parts List .....................................................................................................................................14
Parts Explosion...........................................................................................................................................15
Notes .............................................................................................................................................16
Warranty .............................................................................................................................................17

When unpacking, check to make sure the following parts are included. If any parts are missing or broken,
please call RIKON Power Tools at the number on the cover of this manual as soon as possible.
Contents of Package
5
Carton Contents
Item Description Qty
A Belt & disc sander assembly 1
B Sanding disc 1
C Table support w/scale 1
D Table support 1
E Work table for belt 1
F Miter Gauge 1
G Work table for disc 1
H Locking knob for table support 2
I Mount, support table 1
J Mount, support table w/indicator 1
K Bag of loose parts 1
H Owner’s manual 1
List of loose parts in bag
Description Qty Description Qty
Sunk head screw M6x16 2
Washer 6mm 2
Knurled nut M6 2
Hex. bolt 4
Lock washer 4
Pan head screw M6x16 4
Lock washer 6mm 4
Washer 6mm 2
Hex “L” wrench 3mm 1
Hex “L” wrench 6mm 1

Fig. 01
Fig. 02
6
Assembly
Securing Sander Base Assembly to Workbench
The sander base must be secured before using.
Attach a large C-Clamp to each side of the sander
and the workbench. Or, permanently mount following
the instructions below:
1. Place the sander on the workbench in its final
operating location.
2. Place a pencil through the mountong holes of the
sander base (42) and mark the hole locations on
workbench.
3. Remove sander and drill four 3/8 inch holes through
the workbench.
4. Align sander base over holes and secure using four
5/16 inch screws (or larger) and hex nuts.
(See Fig. 01)
Mounting Sanding Disc and Guard
1. Locate sanding disc (22) and peel backing off
disc.
2. Align perimeter of sanding disc over plate. When
aligned, press disc firmly onto disc.
3. Position disc guard (27) onto lower portion of
sanding disc so that the mounting holes align.
4. Using a Phillips screwdriver, fasten two pan head
screws (found in parts bag) through disc guard.
(See Fig. 02)
Installing the Belt Table
1. Place the work table for belt on the work support.
2. Insert two countersink head screws through work
table and the work support slot.
3. Put a 6mm washer and a wing nut on the screw
and tighten. (See Fig. 03) Fig. 03

7
Fig. 06
Fig. 07
Fig. 05
Fig. 04
Installing the Disc Table Assembly
Warning: To avoid jamming the workpiece or fingers
between the table and sanding surface, the table edge
should be a maximum of 1/16 in from sanding
surface.
1. Use two M6x16 pan head screws to fasten the table
support mount to the front of sander.
2. Place the support table w/scale onto the table
support mount.
3. Put a 6mm flat washer on the table lock knob, and
place the knob into the tilt scale plate and mount. Hand
tighten it only at this time. (See Fig. 04)
4. Place the table onto table support; align the four
screws which are preassembled under the table with
the holes of table support. (See Fig. 05)
5. Put the external lock washer and hex nut onto the
screws, and tighten.
6. Adjust the table and retighten the table lock knobs.
7. Loosen the four M6 hex nuts under the table.
8. Use a 1/16 inch drill bit as a spacer. Place the drill
bit between the disc and the front edge of the table.
Hold the table against the 1/16 inch drill bit and tighten
the four M6 hex nuts. (See Fig. 06)
Leveling Table Assembly
Warning: To avoid injury from accidental start, make
sure tool is unplugged before making any
adjustments.
1. Using a combination square, check the angle of
work table with the disc. (See Fig. 07)
2. If the table is not 90 degrees with the disc, loosen
the table lock knob screw and tilt table.
3. Adjust worktable square to the disc and retighten
the table lock knob.
4. Adjust the pointer to the zero mark on the scale
plate.

8
Installing the Sanding Belt
Warning: To avoid injury from accidental start,
make sure tool is unplugged before making any
adjustments.
On the under side of the sanding belt, you will find
a “direction arrow”. The sanding belt must run in the
direction of this arrow so that the splice does not
come apart.
1. Slide tension lever to the right to release the belt
tension. (See Fig. 08)
2. Place the sanding belt over the drums with the
direction arrow pointing in the proper direction.
(See Fig. 09)Make sure the belt is centered on both
drums.
3. Slide tension lever to the left to apply belt tension.
4. Tighten hex socket screw when bed is in desired
position.
1. Plug in the power cord. Turn the switch “ON” and
immediately “OFF”, noting if the belt tends to slide
off the idler drum or drive drum.
2. If the sanding belt moves toward the disc, turn the
tracking knob clockwise 1/4 turn. (See Fig. 10)
3. If the sanding belt moves away from the disc, turn
the tracking knob counterclockwise 1/4 turn.
4. Turn switch “ON” and immediately “OFF” again,
noting belt movement. Readjust tracking knob if
necessary.
Fig. 08
Fig. 09
Fig. 10
Fig. 11
On/Off Switch
The On/Off Locking Switch needs to have the switch
key inserted before the switch can be used (key
located in parts bag). This feature prevents
unauthorized use of the sander. (See Fig. 11)
CAUTION: Never walk away from sander when
machine is running. Always lock the switch in the Off
position and unplug from the power supply when not
in use.
Tensioning and Tracking

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 plugged 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.
This tool is intended for use on a circuit that has an outlet that looks the one illustrated in Figure A
below. The tool has a grounding plug that looks like the grounding plug as illustrated in Figure A
below. A temporary adapter, which locks like the adapter as illustrated in Figure B below, may be used
to connect this plug to a two-pole receptacle, as shown in Figure B 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. The green colored rigid ear or tab, extending from the adapter,
must be connected to a permanent ground such as a properly grounded outlet box.
* Canadian electrical codes require extension cords to be certified SJT type or better.
** Use of an adapter in Canada is not acceptable.
9
Electrical Requirements

Operation
Bevel Sanding
The work table can be tilted from 0 to 45 degrees for
bevel sanding. Loosen the table lock knob and tilt the
worktable to desired angle as shown. (See Fig. 12)
Retighten table lock knob.
Warning: To avoid jamming the workpiece or fingers
between the table and sanding surface, the table
should repositioned on the table support to retain a
maximum of 1/16” distance between sanding surface
and table.
Positioning the Belt Bed
A bed locking hex socket head screw locks the belt
bed in a vertical or horizontal position.
To adjust vertical position:
1. Remove the work support.
2. Loosen the hex socket head locking screw using a
1/4 inch hex wrench. (See Fig. 13)
3. Position the belt bed vertically as shown and tighten
the hex socket head locking screw.
Surface Sanding on the Sanding Belt
Warning: To avoid injury from slips, jams or thrown
pieces, adjust the backstop to clear the sanding
surface by no more than 1/16th of and inch. When
checking clearance between the belt and work sup-
port, use a 1/16” drill bit as a spacer gauge.
(See Fig. 14)
1. Hold the workpiece firmly with both hands, keeping
fingers away from the sanding belt.
2. Keep the end butted against the backstop and
move the work evenly across the sanding belt. Use
extra caution when sanding very thin pieces. (See Fig.
15)
3. For sanding long pieces, remove the work support.
4. Apply only enough pressure to allow the sanding
belt to remove material.
10
Fig. 12
Fig. 13
Fig. 14
Fig. 15

11
End Sanding on the Sanding Belt
To sand the end of a long workpiece, it is recom-
mended to sand with the belt in the vertical position.
1. To raise the belt to the vertical position, follow the
instructions in “Positioning Belt Bed” on the previous
page.
2. Install the worktable assembly.
3. Move the work evenly across the sanding belt.
(See Fig. 16)
Sanding Curved Edges
Always sand inside curves on the idler drum as
shown.(See Fig. 17)
Warning: Never attempt to sand the ends of a
workpiece on the idler drum, applying the end of the
workpiece to the idler drum could cause the workpiece
to fly up and result in an injury.
Always sand outside curves on the left side of center
on the sanding disc as shown. (See Fig. 18)
Warning: Applying the workpiece to the right side of
the disc could cause workpiece to fly up (kickback)
and result in an injury.
Sanding Small End Surfaces on the Sanding Disc
Note: Use of a miter gauge is recommended for this
operation.
Always move the work across left side of center on
the sanding disc face as shown. (See Fig. 19)
Warning: Applying the workpiece to the right side of
the disc could cause workpiece to fly up( kickback)
and result in an injury.
Fig. 16
Fig. 17
Fig. 18
Fig. 19

12
Fig. 20
Fig. 22
Fig. 23
1. Apply a light coat of paste wax to the worktable to
make feeding stock easier, and reduce rust.
2. Use compressed air to frequently blow out dust and
debris from sander and motor. (See Fig. 20)
Warning: To avoid electrocution or fire, any repairs to
electrical systems should be done only by qualified
service technicians. Unit must be reassembled
exactly to factory specifications.
3. If power cord is worn, cut, or damaged in any way,
have it repaired immediately.
Changing the Motor Belt
1. Using a Phillips screwdriver, remove the three pan
head screws located in the cover. (See Fig. 21)
2. Remove the cover.
3. Loosen four M8 hex head screws to allow the
pulleys to shift enough to place belt around them.
Place belt around motor pulley and drive pulley as
shown. (See Fig. 22)
4. Adjust tension of the belt by putting a wrench in
adjusting gap. Push up on wrench to tighten tension
between pulleys.
5. Tighten the four M8 hex head screws carefully.
6. Test belt tension by placing fingers on either side of
the belt and squeeze. There should be about a 1/4
inch give to the belt. (See Fig. 23)
Note: Too much tension on pulley belt may cause
increased noise and over load the motor. Not enough
tension on the pulley belt may cause belt to fail
prematurely.
7. Locate the pulley cover and position inside the
edges of pulley housing.
8. Using a Phillips screwdriver, reinstall and tighten
the three pan head screws.
Maintenance
Warning: For your safety, remove the plug from
power source outlet before adjusting, maintaining, of
lubricating your belt and disc sander.
Fig. 21

13
SYMPTOM PROBABLE CAUSE REMEDY
Sander does not operate 1. Not plugged into wall outlet. 1. Plug into wall outlet.
2. Locking key is not inserted. 2. Insert locking key.
3. Power switch defective. 3. Replace power switch.
4. Motor or wiring problem. 4. Take to a qualified technician.
Motor slows when sanding 1. Timing belt is too tight. 1. Decrease tension.
2. Applying too much pressure 2. Apply less pressure to work
on work piece. piece when sanding.
Sanding Belt runs off drums 1. Not tracking proplerly. 1. Adjust tracking.
Wood burns while sanding 1. Sanding Disc or Belt is loaded 1.Clean or replace disc or belt.
with debris.
Sander makes excessive noise 1. Timing belt too tight, bearings 1. Decrease tension, oil bearings.
need oil.
Troubleshooting
Wiring Diagram

14
Parts List
Description
Cast Base
Motor Cover
Safety guard, sanding belt lower
Pan head screw M5x8
Thread M6x145
Rubber sleeve
Support stem
Lock base sander belt
Motor
Hex head screw
Lock washer
Drive Pulley
Countersink Washer
Drive pulley
Pulley Cover
Timing Belt
Drive Pulley
Flat head screw M5x25
Bearing support
Lock plate sander plate
Hex socket cap screw M8x25
Retaining ring 15mm
Ball Bearing
Drive Shaft
Panhead screw M5x16
Rubber washer
Tension Lever
Lever Spacer
Rubber washer
Index spring
Rubber bushing
Retaining ring 12mm
Ball bearing
Idler Drum
Idler Shaft
Drum guide
Index spring
Power cord w/plug
“D” shape rubber bushing
Part No.
1-JL61010001-001G
1-JL61010002-001S
1-JL61010012-001S
1-M5X10GB818Z
1-M6X145GB818Z
1-JL61010011-001S
1-JL61010010
1-JL61020026-001G
1-G3512674
1-M8X16GB5781Z
1-WSH8GB93Z
1-JL61020027
1-WSH6GB5287Z
1-JL61020001
1-JL61010004-001S
1-JL61020034
1-JL61020002
1-M6X20GB70Z
1-JL61020004
1-JL61020005-050A
1-M8X25GB5783B
1-CLP15GB894D1B
1-BRG80202GB278
1-JL61020025
1-M5X16GB818B
1-JL61020021-001S
1-JL61020023-050W
1-JL61020013
1-JL60020018
1-JL61020020
1-JL61020022
1-CLP12GB894D1B
1-BRG80101GB278
1-JL61020017
1-JL61020016
1-JL61022000
1-JL61020015
1-JL20072101
1-JL61010009-001S
Key
No.
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
Key
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31a
31b
32a
32b
33
34
35
36
37
38
Description
Sanding Belt 152x1219mm
Bed
Knob
Washer
Wing screw
Sunk head screw M6x16
Work table for belt
Work support, sander belt
Lock pin, work support
Wing nut M6
Lock wahser-helical 5mm
Pan head Screw M5x8
Pan head Screw M5x16
Switch housing
No-volt switch
Bearing spacer
Bearing cap
Socket head screw M8x10
Drive drum
Cover, switch Housing
Pad-254mm dia. Sander paper
Screw-pan cross M6x12
Disc
Support, sanding disc
Tapping screw M4x12
Disc guard
Disc shroud
Hex nut M6
Pan head screw M6x16
Mount, table support, left
Mount, table support, right
Table support, left
Table support,right
Table
Dust collector
Pan head screw M5x16
Clamp handle
Handle
Pan head screw M5x16
Part No.
1-JL61020032
1-JL61021000-050W
1-JL20061101/2-001S
1-WSH8GB96B
1-JL61040006
1-M6X16GB818B
1-JL61040008-050W
1-JL61040007-001S
1-JL61040004
1-JL20061003-001S
1-WSH5GB862D2Z
1-M5X14GB818B
1-ST4D2X25GB845B
1-JL60062001-049S
1-J-9301B
1-JL61020008
1-JL61020007
1-M8X10GB80B
1-JL61020006
1-JL60062002-049S
1-JL61020033
1-M6X10GB70Z
1-JL61030001
1-JL61030002
1-M5X40GB70Z
1-JL61010005-050W
1-JL61010006-001S
1-M6GB6170Z
1-M6X16GB5781Z
1-JL61030005-001Y
2-JL61034000-001Y
2-JL61032000-001Y
2-JL61033000-001Y
1-JL61030010-001G
1-JL61010003-001S
1-M5X16GB818B
1-JL61010014-001Y
1-JL61010013-050W
1-M6X16GB818B

15
Parts Explosion

16
Notes

17
To take advantage of this warranty, please ll out the enclosed warranty card and send it to:
RIKONWarranty
16 Progress Rd.
Billerica, MA. 01821
The card must be entirely completed in order for it to be valid. If you have any questions
please contact us at 877-884-5167 or [email protected].
Warranty
5-Year Limited Warranty
RIKON Power Tools, Inc. (“Seller”) warrants to only the original retail consumer/purchaser of our
products that each product be free from defects in materials and workmanship for a period of five
(5) years from the date the product was purchased at retail. This warranty may not be transferred.
This warranty does not apply to defects due directly or indirectly to misuse, abuse, negligence,
accidents, repairs, alterations, lack of maintenance or normal wear and tear. Under no
circumstances will Seller be liable for incidental or consequential damages resulting from
defective products. All other warranties, expressed or implied, whether of merchantability,
. This warranty does not cover
products used for commercial, industrial or educational purposes.
This limited warranty does not apply to accessory items such as blades, drill bits, sanding discs or
belts and other related items.
Seller 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.
To take advantage of this warranty proof of purchase documentation, which includes date of
purchase and an explanation of the complaint, must be provided.
The Seller reserves the right to effect at any time, without prior notice, those alterations to parts,
.

For more information:
16 Progress Rd.
Billerica, MA. 01821
877-884-5167/978-528-5380
[email protected]
www.rikontools.com
Copyright RIKON Power Tools Inc. 2005 Printed in China 6/06