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What should be done when vertical streaks (stop marks) are formed in tapered threads for pipes?
When machining with Tap , vertical streaks (stop marks) are always attached because the reverse rotation is returned after machining with forward rotation.
As a countermeasure, it is recommended to process with a thread mill.
Improved stop marks with thread mills
[Improvement of tapered thread quality for pipes]
Compared to the general taper Tap
・High roundness
・ No stop mark occurs
[Improvement of tapered thread quality for pipes]
Compared to the general taper Tap
・High roundness
・ No stop mark occurs
| General Taper Tap | Thread Mill |
|---|---|
 |
 |
(FAQID:8922)