Panasonic Grinder 3343109 User Manual

Po w e r To o ls  
Item# 3343109  
3" VARIABLESPEED BENCHGRINDER  
USER' S MANUAL  
Read carefully and understandRULES FOR SAFEOPERATION and instructions  
before operating. Failure to follow the safety rules and other basic safety  
precautions may result in serious personal injury.  
Assembly and Operation Instructions  
Made in China  
 
12. Check for damaged parts. Before using this tool, anypart that appears damaged should be  
carefully checked to determine that it will operate properly and perform as intended. Checkfor  
alignment and bindingof moving parts, broken parts ormounting fixtures and any other conditions  
that may affect proper operation. Any part that is damaged should be properly repaired or  
replaced by a qualified technician. Do not use the tool if any switch does not turn on and off  
properly.  
13. Replacement parts and accessories.When servicing use only identical replacement parts.  
Use of otherparts will void the warranty. Only use accessories intended for use with this tool.  
14. Use proper size andtype extension cord. If an extension cord is required. It must be of the  
proper size and type to supplythe correct current to the tool without heatingup; otherwise, the  
extension cord could melt and catch fire or cause electrical damaged to the tool. This tool  
requires use ofan extension cord of 0 to 10 Amps capability (up to 50 feet), with wire size rated  
at 18 AWG. Longer extension cords require a largersize wire. Ifyou are usingthe tool outdoors,  
use an extension cord rated for outdooruse (signified by"WA" on the jacket).  
15. Take cautionas some woods containpreservatives such as copper chromiumarsenate (CCA) which can  
be toxic. When using these materials, extra care should be taken to avoid inhalation  
and minimize skin contact. Wear an approved dusk mask or respirator.  
16. Maintenance. For your safety, service and maintenance should be performed regularlyby a  
qualified technician.  
ADDITIONAL SPECIFIC SAFETY INSTRUCTIONS FOR BENCHGRINDERS  
1. When grindingany metals, the grinder can produce sparks which mayland on yourclothing or  
hit your face.You should use a fullface mask and appropriate protective clothing. Also ensure  
that you are not operating the grinder around flammable materials of liquids. Always make sure  
the safetyshields and wheelguards are in place at alltimes. Keep guards in place and in good  
working order.  
2. Make sure the grinding wheels are of the proper speed (RPM)rating for the grinder.  
3. Frequentlyquench the workpiece in water to prevent overheating; be careful not toget water  
on the bench grinder.  
4. Use the tool rest to steady the workpiece. If the tool rest is not used the torque ofthe spinning  
grinding wheel maypull the workpiece from your hands.  
5. Do not use aluminum oxide wheels when grindingnonferrous metals such as aluminum and  
brass. Use silicon carbide wheels fornonferrous metals.  
6. When buffing material, always hold the materialon the lower side ofthe buffing wheel. Always  
keep fingers clearof the grindingwheel and the tool rest.  
Note: Performance of this tool mayvary depending on variations in localline voltage. Extension  
cord usage may also affect tool performance.  
!
WARNING  
The warnings, cautions, and instructions discussed in this instruction manual cannot cover all  
possible conditions and situations that mayoccur. It must be understood by the operator that  
common sense and caution are factors which cannot be built into this product, but must be  
supplied by the operator.  
UNPACKING  
When unpacking, checkto make sure the following parts are included:  
(1) 3" Bench Grinder  
(1) Flex Shaft  
(1 ) Wrench  
(1) Grinder wheel  
(1) Fiber Wheel  
(2) Grinding Stone Bits  
OPERATION  
Turning the Bench Grinder ONand OFF  
1. Insert the pluginto an electricaloutlet.  
2. Turn the speed controlknob (46) clockwise to turn the motor ON and adjust its speed.  
3. To turn OFF, turn the knob counterclockwise until it clicks.  
4. Never leave the bench grinder runningunattended. Always turn off the tool when not in use.  
2 of 5  
 
USING THE GRINDER  
WARNING  
!
The grinding wheelcan fly apart and cause injury. Grindingwheels must always be checked for  
cracked for cracks or imperfections. This is done with the "ringtest". Tap the wheelgently near  
the outer rim with the handle of a screwdriver. You should heara clear bell-like ring. If a dull thud  
occurs, do not use the wheel. The wheel maybe damaged and could come apart duringoperation.  
CAUTION: Always wear ANSI-approved safetyglasses when grinding.  
1. Always bring the workpiece into the wheelgently, without jarring.  
2. The workpiece will quickly become heated; therefore, frequent quenching in water is required.  
3. When grindinghigh speed steels such as drilland tool bits,avoid high temperature buildup as  
this can affect the temper ofthe steel.  
4. For smallworkpieces such as drill bits orchisels, avoid applying pressure to the wheel at a high  
angle that could cause the workpiece to become lodged between the tool rest and the wheel.  
5. When usingthe Flexible Shaft, be sure the Grinder is turned OFF and wait for it to stop before  
setting down the Flexible Shaft.  
MAINTENANCE  
Dressing the GrindingWheel  
Note: New wheels frequentlyare not true and during operation will often become grooved, glazed  
(build up), out of round, ormisshapen. You will need a grinding wheel dresser for this operation.  
1. Stand tothe side ofthe wheel for this operation.  
2. If the wheel is newlet it run for a minute with no load. If the wheel runs straight and true you will  
not need todress it priorto operation. Ifit dose not, proceed with the following instructions.  
3. If you are using a "pistol grip" dresser, grip the handle firmly with one hand and the arm oft  
he dresser with the other. Allow the wheelto reach fullspeed. Use the tool rest to support your  
hand and the dresser, and evenly applythe dresser to all surfaces ofthe wheel. The wheel can be  
dressed in a few minutes.  
4. If you are using an "inline" dresser, hold the handle firmly, put the dresser on the tool test so  
that its wheels can move freely (i.e., the exposed part ofthe wheel should be facing up ). Let the  
wheel reach fullspeed and applythe dresser evenly to allsurfaces.  
PART LIST  
Part No.  
Description  
Quantity  
Description  
Quantity  
Part No.  
30  
1
2
Left Nut M10  
Wheel Pushing Ring  
Polishing Wheel  
1
4
1
6
13  
4
2
1
1
2
1
2
1
9
2
1
2
1
2
2
Plastic Shield  
Lock Nut M4  
2
2
2
2
2
2
2
1
1
2
1
1
1
1
1
1
1
1
1
1
31  
Plastic Shield Mounting Plate  
3
32  
4
Nut M4  
33  
Flat Washer  
Spring Washer M4  
Flat Washer (4.3x12x1)  
Spring Washer  
5
34  
6
35  
Pan Head ScrewM6x20  
Pan Head ScrewM4x40  
Cover  
7
Steel Sleeve  
Wheel Cover  
Bearing Cover  
36  
8
37  
Grinding Wheel  
9
38  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
Brush Cover  
Bearing  
39  
Gasket  
Nut M10  
40  
Brush  
41  
Flexible Shaft Connector  
Rotating Guard  
Motor Housing  
42  
Flat Washer (4.3x8x0.5)  
43  
Wheel Cover  
Pan Head ScrewM5x10  
Flexible Shaft Connector Nut  
Knob  
Short Sleeve  
Brush Holder  
Long Sleeve  
44  
45  
46  
Stator  
47  
Nut M10  
Stator Bolt  
Snap Ring  
48  
Washer  
49  
Switch  
3 of 5  
 
Description  
Quantity  
Description  
Base  
Quantity  
Part No.  
21  
Part No.  
50  
Fan Shroud  
Rotor  
1
1
1
1
5
1
4
4
1
1
1
22  
51  
Circuit Board  
Pan Head ScrewM4x10  
Plastic Cover  
Rubber Feet  
23  
Rubber Gasket  
Workpiece Holder  
2
52  
24  
2
53  
25  
Pan Head ScrewM5x8  
Spring Washer M5  
11  
16  
16  
1
54  
26  
55  
Pan Head ScrewM5x18  
Sleeve Plate  
27  
Flat Washer  
Bearing  
56  
28  
57  
Circuit Sleeve  
Cord  
Grinding Wheel Cover  
29  
1
58  
4 of 5  
 
5 of 5  
 

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