DeWalt DW756 Instruction Manual page 4

Operation
NEVER USE A BENCH GRINDER IF IT IS NOT FIRMLY FASTENED TO A WORK
BENCH OR RIGID FRAME. Before turning the grinder on, put on safety glasses. Turn on
the grinder and allow it to reach full speed (3450 RPM - DW756, 3600 RPM - DW758).
Hold the workpiece firmly and against the tool rest. Hold very small pieces with pliers or
other suitable clamps. Feed the work smoothly and evenly into the grinding wheel. Move
the work slowly and avoid jamming the work against the wheel. As the wheel tends to slow
down you should occasionally release the pressure to let the wheel return to full speed.
Grind only on the face of the grinding wheel and never on the side. (Some wheels are
designed for side grinding and will say so on their instruction sheets).
CAUTION: Prolonged grinding will cause most materials to become hot. Handle them
with pliers or thick gloves.
Switch
The switch is located on the front of the grinder, on the base. (Figure 1) To turn the tool on
depress the side of the rocker switch on the left side, marked "ON". To turn off the grinder,
depress the right side of the rocker switch, marked "OFF".
Installing Tool Rests
TURN OFF AND UNPLUG THE BENCH GRINDER
Remove the tool rests from the packing and install as shown in Figure 2. Use the washers
and screws supplied.
CAUTION: Longer screws may interfere with the movement of the grinding wheel.
Maintenance
CLEANING
Blowing dust and grit out of the motor housing using compressed air is a necessary regu-
lar maintenance procedure. Dust and grit containing metal particles often accumulate on
interior surfaces and could create an electrical shock hazard if not frequently cleaned out.
ALWAYS WEAR SAFETY GLASSES.
FIG. 5
ARBOR SHAFT
SPACER
WASHER
ACCESSORY
FIG. 6
WASHER
NUT
WASHER
NUT
WASHER
SPACER
ARBOR SHAFT
ACCESSORY
CAUTION: Never use solvents or other harsh chemicals for cleaning the non-metallic
parts of the tool. Use clean, dry rag only.
LUBRICATION
D WALT tools are properly lubricated at the factory and are ready for use. Tools should be
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relubricated regularly every sixty days to six months, depending on usage. (Tools used
constantly on production or heavy-duty jobs and tools exposed to heat may require more
frequent lubrication.) This lubrication should only be attempted by trained power tool repair
persons, such as those at D WALT service centers or in other qualified service organiza-
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tions.
Accessories
Recommended accessories for use with your tool are available at extra cost from your dis-
tributor or local service center.
Grinding wheels must fit within the confines of the guard and must be rated higher than the
recommended speed as marked on the nameplate.
Recommended accessories for use with your tool are available at extra cost from your dis-
tributor or local service center.
CAUTION: Strands of wire cup brushes may break and fly off while in use. Users and
others in the area should wear adequate eye, face and body protection. Use only wire cup
brushes that are rated at or greater than the RPM shown on the tool's nameplate.
WARNING: To reduce the risk of injury, always use proper guards when grinding and
wear eye protection.
Changing Accessories
TURN OFF THE TOOL AND DISCONNECT FROM POWER SUPPLY.
CHANGE ACCESSORIES WHEN THE SPARK GUARD CAN NO LONGER BE
ADJUSTED TO 1/16" FROM THE WHEEL.
DW756 - USE ONLY WHEELS THAT MEASURE 6" IN DIAMETER. THIS TOOL HAS
1/2" ARBORS ON EACH SIDE.
DW758 - USE ONLY WHEELS THAT MEASURE 8" IN DIAMETER. THIS TOOL HAS
5/8" ARBORS ON EACH SIDE.
Follow the steps below to remove and replace an accessory.
1. Raise the eye shield.
2. Loosen and pull the tool rest out as far as possible. Do no remove it.
3. Loosen and pull the spark guard out as far as possible, Do not remove it.
4. Remove the screws from the side cover and remove cover.
5. Using hex or adjustable wrenches, grasp the two hex nuts holding the wheels to the
arbor shaft at each end of the tool. To remove the wheel from the left turn the hex nut
clockwise while holding the other stationary.
6. Remove the wheel washer and the wheel.
7. Inspect the wheel for cracks, chips or any other visible damage (other than normal
wear) and discard if such damage is found. Inspect the blotter for damage. If the blot-
ter is missing or severely damaged, replace it with a piece of thin cardboard or blotter
paper cut to the same size. NEVER USE A WHEEL WITHOUT A BLOTTER.
8. Install the new wheel or other accessory. Be sure that both wheel washers are in place
(concave side toward the wheel) See Fig. 5. For the DW756 see Fig 5 and 6.
9. Hold as before and tighten the nut firmly but do not overtighten. Overtightening can
crack a grinding wheel.
10. Replace the wheel cover and its screws.
11. Adjust the spark guard to 1/16" from the wheel tighten securely.
12. Adjust the tool rest to 1/8" from the wheel and tighten securely.
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