Makita 8281D, 8381D, 8391D, 8271D instruction manual Assembly, Operation

Selecting the action mode

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1.Action mode changing ring

2.Arrow

ASSEMBLY

CAUTION:

•Always be sure that the tool is switched off and the battery cartridge is removed before carrying out any work on the tool.

Installing or removing driver bit or drill bit

3	1	1.	Sleeve
		2.	Ring
		3. Tighten

This tool employs an action mode changing ring. Select one of the three modes suitable for your work needs by using this ring.

For rotation only, turn the ring so that the arrow on the

tool body points toward the mark on the ring.

For rotation with hammering, turn the ring so that the

arrow points toward the mark on the ring.

For rotation with clutch, turn the ring so that the arrow

points toward the mark on the ring.

CAUTION:

•Always set the ring correctly to your desired mode mark. If you operate the tool with the ring positioned halfway between the mode marks, the tool may be damaged.

Adjusting the fastening torque

		1. Graduations
	2	2. Adjusting ring
		3. Pointer
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The fastening torque can be adjusted in 16 steps by turning the adjusting ring so that its graduations are aligned with the arrow on the tool body. The fastening torque is minimum when the number 1 is aligned with the arrow, and maximum when the number 16 is aligned with the arrow.

Before actual operation, drive a trial screw into your material or a piece of duplicate material to determine which torque level is required for a particular application.

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Hold the ring and turn the sleeve counterclockwise to open the chuck jaws. Place the bit in the chuck as far as it will go. Hold the ring firmly and turn the sleeve clockwise to tighten the chuck.

To remove the bit, hold the ring and turn the sleeve counterclockwise.

OPERATION

Hammer drilling operation

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.

First, turn the action mode changing ring so that the

arrow on the tool body points to the marking. The adjusting ring can be aligned in any torque levels for this operation.

Be sure to use a tungsten-carbide tipped bit.

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 slipping 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 several times, the hole will be cleaned out and normal drilling may be resumed.

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