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Troubleshooting schedule
Problem
Steps on the spot
Check bit.
Drilling is unusually
slow.
Check for metal
powder in waste
water.
Bit is stuck.
Shut off drill.
Tube is abraded.
14 –
English
MAINTENANCE
Probable cause
Bit is worn out.
Bit is clogged with chips.
Diamond is rounded.
Drill is cutting reinforcing rods.
Stone or steel bar is caught
between core and bit.
Base wanders during drilling.
Clamp has too much free play.
The bit's outer diameter is the
same as the tube's.
Clamp has too much free play.
Bit, tube, or base are loose.
Bit is deformed.
Chips not discharging well.
Solution
Replace bit.
Clean bit with a wire brush and
increase water pressure.
Use a softer bond bit. Increase
force on handle.
Ease up the handle to avoid
tripping the circuit breaker.
Using a wrench, rotate the bit
clockwise to free it while backing
out the handle. (Rotating it
counterclockwise may unscrew
the bit from the tube.)
Reset the base and tighten
securely.
Adjust clearance of clamp
properly.
Replace bit.
Adjust clearance of clamp
properly.
Tighten securely.
Replace bit.
Increase water pressure and
volume.
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