31
ENGLISH
Fig. 18
Table. 3 Overhang and Speed
Overhang (mm)
Max. Speed (min
-1
) (rpm)
20
N x 0.5
25
N x 0.3
50
N x 0.1
* N = Max. Operating Speed with 13mm overhang.
(6) Always operate cutting tools within the allowable recommended speed of the cutting
tools. Use of a cutting tool outside of the allowable speed of the cutting tools could
cause damage to the Spindle and injury to the operator.
(7) When replacing the tool, make sure the tool shank, collet, collet nut, and inner face of
the collet holder are clean. If ground particles or metal chips stick to the inside of the
collet, damage to the collet holder or Spindle can occur due to the loss of precision.
(8) Do not strike or disassemble the Spindle.
(9) Please set the cutting tools to minimize the overhang amount. 13mm is the maximum
amount of overhang to maintain high accuracy and safety.
13
Grind Stone
If a problem or concern occurs, please check the following prior to consulting your dealer.
14
. TROUBLESHOOTING
Trouble
Cause
Inspection / Corrective Action
Spindle does not
rotate or rotate
smoothly.
The spindles ball bearings
have been damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The motor has been damaged.
Replace the motor.
(Return to NAKANISHI dealer service.)
Overheating
during rotation.
Cutting debris has contaminated
the ball bearings, and the ball
bearings are damaged.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
Abnormal
vibration or noise
during rotation.
The tool shank is bent.
Replace the tool.
Cutting debris has
contaminated the ball bearing.
Replace the ball bearings.
(Return to NAKANISHI dealer service.)
The spindles ball bearings
have been damaged.
Collet holder
slippage.
The collet holder is worn or
damaged.
Replace the collet holder.
The internal components
of the Spindle are worn or
damaged.
Replace the internal components of
the Spindle.
(Return to NAKANISHI dealer service.)
