MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and unplugged before attempting to perform inspection or maintenance.
Sharpening tungsten-carbide tip bit
When your bit becomes dull, use an ordinary bench grinder with a wheel made of silicon carbide to resharpen it.
CAUTION :
Be sure to maintain the original angles of the tip. Especially without 60" chamfering, the
0 Do not quench the bit in water or oil. 
Do not grind the sides B and C.
0.5 ir
A - A' Cross section
To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspection and replacement, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts.
9