Makita HR3851 Operation, Depth gauge, Hammer drilling operation, Blow-out bulb optional accessory

	003183
	1
2	3

1.Clamp screw

2.Depth gauge

3.Grip base

Depth gauge

The depth gauge is convenient for drilling holes of uniform depth. Insert the depth gauge into the hole in the grip base. Adjust the depth gauge to the desired depth and then tighten the clamp screw to secure the depth gauge.

NOTE:

•The depth gauge cannot be used at the position where the depth gauge strikes against the tool body.

OPERATION

003199

Hammer drilling operation

Set the change lever to the symbol.

Position the bit at the desired location for the hole, then pull the switch trigger. Do not force the tool. Light pressure gives best results. Keep the tool in position and prevent it from slip- ping away from the hole.

Do not apply more pressure when the hole becomes clogged with chips or particles. Instead, run the tool at an idle, then remove the bit partially from the hole. By repeating this sev- eral times, the hole will be cleaned out and normal drilling may be resumed.

CAUTION:

•There is a tremendous and sudden twisting force exerted on the tool/bit at the time of hole break-through, when the hole becomes clogged with chips and particles, or when striking reinforcing rods embedded in the concrete. Always use the side grip (auxiliary handle) and firmly hold the tool by both side grip and switch handle during operations. Failure to do so may result in the loss of control of the tool and potentially severe injury.

002449 Blow-out bulb (optional accessory)

After drilling the hole, use the blow-out bulb to clean the dust out of the hole.

1

1. Blow-out bulb

9