Owner's manual

ManualsBrandsSandvik Coromant ManualsMetalworkingThreading

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Excessive edge pressure

• Work hardening material in combina-

tion with infeed depths which are

too shallow

• Excessive pressure on cutting edge

• Insert thread pro le angle too small

• Reduce the number of infeeds

• Change to F-geometry

• Change to a tougher grade

• Use modi ed  ank infeed

Incorrect thread pro le

• Unsuitable thread pro le (angle of

thread and nose radius) external

inserts used for internal operation

or vice versa

• Wrong centre height

• Holder not 90° to centre line

• Pitch error in machine

• Adjust to correct tool, shim and

insert combination

• Adjust centre height

• Adjust holder to 90°

• Correct the machine

Problem Cause Solution