Makita 6300LR Instruction Manual - Page 7

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MAINTENANCE

1. Limit mark

Drilling in metal

To prevent the bit from slipping when starting a hole, make

an indentation with a center-punch and hammer at the point

to be drilled. Place the point of the bit in the indentation and

start drilling.

Use a cutting lubricant when drilling metals. The exceptions

are iron and brass which should be drilled dry.

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 twisting force exerted on the tool/

bit at the time of hole breakthrough. Hold the tool firmly

and exert care when the bit begins to break through the

workpiece.

•

A stuck bit can be removed simply by setting the

reversing switch to reverse rotation in order to back out.

However, the tool may back out abruptly if you do not

hold it firmly.

•

Always secure small workpieces in a vise or similar hold-

down device.

•

Avoid drilling in material that you suspect contains

hidden nails or other things that may cause the bit to

bind or break.

CAUTION:

•

Always be sure that the tool is switched off and

unplugged before attempting to perform inspection or

maintenance.

Replacing carbon brushes

001145

Remove and check the carbon brushes regularly. Replace

when they wear down to the limit mark. Keep the carbon

brushes clean and free to slip in the holders. Both carbon

brushes should be replaced at the same time. Use only iden-

tical carbon brushes.