DeWalt DW818, DW827, DW824, DW821 manual Operation

Models: DW824 DW821 DW818 DW827

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English

Mounting Backing Pads and Sanding Flap Discs

Sanding backing pads are available as optional accessories. Before fitting the pad, unplug the tool from the power supply and follow instructions provided with the accessory backing pad.

Mounting Hubbed Wheels

Hubbed wheels screw directly on the grinder spindle without the use of flanges.

Fitting Wire Cup Brushes and Wheels

Wire cup brushes or wire wheels screw directly on the grinder spin- dle without the use of flanges. A type 27 guard is required when using wire brushes and wheels.

CAUTION: Accessories must be rated for at least the speed recommended on the tool warning label. Wheels and other acces- sories running over the rated speed can fly apart and cause injury.

CAUTION: Wire brushes can become sharp. Wear work gloves when handling wire cup brushes.

OPERATION

Starting and Stopping the Tool (FIG. 16)

1.Before connecting the tool to a power supply, be sure the switch is in the off position by pressing the rear part of the switch and releasing. If the switch is locked on when the power is connected, the tool will start unexpectedly.

2.

To start the tool, slide the ON/OFF switch

FIG. 16

 

(A) toward the front of the tool.

 

2.

To stop the tool, release the ON/OFF

 

 

switch.

A

3.

For continuous operation, slide the

 

switch toward the front of the tool and press the forward part of

the switch inward.

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4.To stop the tool while operating in continuous mode, press the rear part of the switch and release.

NOTE: To reduce unexpected tool movement, do not switch the tool on or off while under load conditions. Allow the grinder to run up to full speed before touching the work surface. Lift the tool from the surface before turning the tool off. Allow the tool to stop rotating before putting it down.

Grinding (FIG. 17)

Using a depressed center Type 27 wheel, hold the tool at an angle of approximately 20˚- 30° to the work for grinding. Most Type 27 wheels are not designed for cutting operations.

Wire Brushing

FIG. 17

(FIG. 18 & 19)

 

Use wire brushes to clean welds, metal

 

corners, and angles, and to remove paint.

20˚-30˚

CAUTION: Use a Type 27 guard with wire

brushes and wheels. Operators and others in the FIG. 18 area should wear appropriate eye, face and body protection. Strands of wire may break and fly off

when wire wheels and brushes are in use.

Sanding With Abrasive Discs

 

(FIG. 20)

FIG. 19

When using an abrasive disc and rubber backing

 

pad, hold the tool so that an angle of 5° to 15°

 

exists between the disc and the work, as shown.

 

Using an angle of 5° to 15° will allow you to pro- FIG. 20

duce a smooth surface. If only the outer edge

 

of the sanding disc is pressed flat against the

 

work, the sanding action will be irregular and

5˚ - 15°

bumpy and the tool will be difficult to control.

 

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DeWalt DW818, DW827, DW824, DW821 manual Operation