Makita BHP343, BHP453 instruction manual Operation

Hook (Accessory)
1	1. Screw
	2. Groove
	3. Hook
2
3
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The hook is convenient for temporarily hanging the tool. This can be installed on either side of the tool.

To install the hook, insert it into a groove in the tool housing on either side and then secure it with a screw. To remove, loosen the screw and then take it out.

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.

Blow-out bulb (optional accessory)

1. Blow-out bulb

1

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

Screwdriving operation

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First, turn the action mode changing ring so that the arrow on the tool body points to the marking. Adjust the adjusting ring to the proper torque level for your work. Then proceed as follows.

Place the point of the driver bit in the screw head and apply pressure to the tool. Start the tool slowly and then increase the speed gradually. Release the switch trigger as soon as the clutch cuts in.

CAUTION:

•Make sure that the driver bit is inserted straight in the screw head, or the screw and/or bit may be damaged.

NOTE:

•When driving wood screws, predrill pilot holes to make driving easier and to prevent splitting of the workpiece. See the chart.

Nominal diameter of wood screw	Recommended size of pilot hole
(mm)	(mm)
3.1 (1/8”)	2.0 - 2.2 (5/64” - 3/32”)
3.5 (9/64”)	2.2 - 2.5 (3/32” - 3/32”)
3.8 (5/32”)	2.5 - 2.8 (3/32” - 7/64”)
4.5 (11/64”)	2.9 - 3.2 (7/64” - 1/8”)
4.8 (3/16”)	3.1 - 3.4 (1/8” - 9/64”)
5.1 (13/64”)	3.3 - 3.6 (1/8” - 9/64”)
5.5 (7/32”)	3.7 - 3.9 (9/64” - 5/32”)
5.8 (7/32”)	4.0 - 4.2 (5/32” - 11/64”)
6.1 (15/64”)	4.2 - 4.4 (11/64” - 11/64”)
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Drilling operation

First, turn the adjusting ring so that the pointer points to

the marking. Then proceed as follows.

CAUTION:

•Pressing excessively on the tool will not speed up the drilling. In fact, this excessive pressure will only serve to damage the tip of your bit, decrease the tool performance and shorten the service life of the tool.

•There is a tremendous force exerted on the tool/bit at the time of hole break through. Hold the tool firmly and exert care when the bit begins to break through the workpiece.

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