Milwaukee 5303-20 manual Operation, Starting, Stopping & Controlling Speed, Operating

OPERATION

WARNING!

To reduce the risk of injury, always wear eye protection.

Selecting Action (Fig. 5)

MILWAUKEE Rotary Hammers have three settings: drilling, rotary hammer and hammering.

Fig. 5

Selector lever

1.For drilling, turn the selector lever so the arrow on the lever points to

the twist drill symbol .

2.For rotary hammering, turn the selector lever so the arrow points to

the hammer and twist drill symbol .

3.For hammering only, turn the selector lever so the arrow points to the hammer symbol .

NOTE: To engage the hammering mechanism, maintain pressure on the bit. When pressure on the bit is released, the hammering action will stop.

Starting, Stopping & Controlling Speed

1.To start the tool, pull trigger.

2.To stop the tool, release trigger.

3.To vary the speed, increase or decrease pressure applied to trigger.

Operating

Position the tool, grasp the handles firmly and pull the trigger. Always hold the tool securely using both handles and maintain control. This tool has been designed to achieve top performance with only moderate pressure. Let the tool do the work.

If the speed begins to drop off when drilling deep holes, pull the bit partially out of the hole while the tool is running to help clear dust. Do not use water to settle the dust since it will clog the bit flutes and tend to make the bit bind in the hole. If the bit should bind, a built-in, non- adjustable slip clutch prevents the bit from turning. If this occurs, stop the tool, free the bit and begin again.

Using Rotary Percussion Core Bits (Fig. 6)

Core bits are useful for drilling large holes for conduit and pipe. MILWAUKEE Heavy-Duty Thin Wall Core Bits have heat treated steel bodies with durable carbide tips. They are specially designed for fast, accurate drilling with combined hammering and rotary action.

Fig. 6

Adapter

Clean and lubricate threads

Core Bit

Center Pin

Guide Plate

1.Clean and lubricate the threads on the adapter and core bit as indicated (Fig. 6) to make later removal easier. Screw the threaded end of the adapter into the rear of the core bit.

2.Push the guide plate onto the pointed end of the center pin. Insert the center pin guide plate assembly into to the core bit. Be sure the small end of the center pin is securely placed into the hole in the center of the core bit.

3.Insert the adapter into the nose of the tool as described in “Inserting Drill Bit or Chisel”. Set the rotary hammer/drill lever to rotary hammer.

4.Press the center pin firmly against your center mark, hold the tool firmly and pull the trigger.

5.After drilling to about the depth of the core bit teeth, remove the center pin and guide plate from the core bit. Resume drilling.

6.After you have finished drilling the hole, hold the tool upwards, pointing it away from your body, and run it briefly in forward to loosen the core bit from the adapter.

MILWAUKEE Heavy-Duty Thin Wall Core Bits drill holes up to 3" deep. To make deeper holes, remove the bit, break and remove the core. Resume drilling.

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