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Troubleshooting

Milling Chuck

Tool cannot be held after tightening

 Tool insertion is hard (not possible)
Clamping ring will not be loosened. Tool cannot be pulled out.
Rotation of tightening ring is not smooth. Tool is pulled out during cutting.
No click sound is generated (CTA).
（Tight-up ring's failure）		 Deteriorated runout accuracy Guidelines for chucking accuracy
Direct: 30 micrometers and above at 100mm
With MC collet: 50 micrometers and above at 4D
Falling off of tool chuck during ATC
Chattering

 

Hydraulic Chuck

Tool clamping is not possible.

 Hard to insert a tool （unable to insert）
Tool will not be pulled out. Tool is pulled out during operation.
Chattering Deteriorated runout accuracy during cutting
Guidelines: 15 micrometers and more at 4d
Deteriorated runout accuracy (flange type)

 

Stub Holder

Unable to mount collet.

 Unable to mount to spindle.
Excessive play when mounting into spindle. Holder comes off from spindle.
Coolant is leaking or there is no coolant output. Cutting tool comes off or slips.
Poor accuracy. Chattering
Holder does not come off from spindle.  

 

Tapping Chuck

Thread gauge (stop) can go through.
（Enlarged thread diameter）

 Thread gauge (through) cannot go through.
（Thread diameter is small.）
Tap is pulled out. Thread is not deep enough. （Variation of thread depth）
Thread is too deep. （Variation of thread depth） Breakage of tap at the hole entrance
Breakage of tap in the middle Breakage of tap at the regular bottom

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