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15.
CONFIRMING THE PART BORE DIAMETERS, COLLET DIAMETER AND
GRINDSTONE DIAMETER
CAUTION
Be sure to confirm the grindstone manufactures maximum rotation speed for that
grindstone before rotating the spindle. If using the grindstone beyond the maximum
rotational speed of the grindstone, damage to the grindstone, spindle or malfunction to the
collet or spindle will occur.
When using a grindstone, select the correct collet diameter for the corresponding shank size and
grindstone diameter according to diameter of the bore to be ground (Refer to Table. 4).
Table. 4
Work Hole Diameter
Less than φ13.0mm
Less than φ70.0mm
16.
TROUBLESHOOTING
If a problem or concern occur, please check the following items prior to consulting your dealer.
Trouble
The Air Turbine Spindle
does not rotate or rotate
smoothly.
Air Turbine Spindle
rotation speed is too
slow.
Collet Diameter
Recommended Grindstone Diameter
Less than φ6.0mm
φ3.0mm
Less than φ16.0mm
φ6.0mm
Cause
Air flow does not reach the
Air Turbine Spindle.
The spindle ball bearings
have been damaged.
The connection hose or air /
oil supply hose have been
damaged.
Poor connection of input
supply or air / oil supply
hose.
Low air pressure.
Low Lubricating Oil.
Water, dirt and debris are
collected in the Air Filter.
Inspection / Corrective Action
Check if input supply connection hose
or air / oil supply hose is broken, bent or
disconnected.
Check connection of the input supply
connection and air / oil supply hoses.
Check the compressor power supply and
the air compressor output.
Check the Regulator and set to the correct
air pressure.
Check all connections input supply and air /
oil supply hose.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Replace the input supply and or air / oil
supply hoses.
Check all threaded joints and re-tighten if
necessary.
Check the Compressor, Air Circuit, and
Regulator.
Check lubricator for proper lubricant level.
Set the Oil Drip Rate 1 drops / min. if using
the AL - M1202 Air Line Kit or commercially
available Air Line Kit.
Drain water, dirt and debris from the Air
Filter Bowl.
31
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