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Thread milling

Solution Partner Pioneer Solution Partner Pioneer
Solution Partner Pioneer

Why did the thread milling start to cut from the bottom of geometry? Is it possible start from the top face to bottom?
I try it. But it does not work.

Thread Milling Test.png

 

3 REPLIES

Re: Thread milling

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

If you are climb cutting (with "normal" direction tools) you have to start at the bottom (for right hand threads).

If you start at the top, you have to use conventional cutting

Ken Akerboom Sr CAx Systems Engr, Moog, Inc.
Production: NX10.0.3.5 MP16/TC11.2
I'd rather be e-steamed than e-diseaseled


Re: Thread milling

Valued Contributor
Valued Contributor

To add to Ken's answer from a practical standpoint in a blind hole it is much better to start at the bottom to avoid recutting chips which is a problem when starting from the top with conventional milling.

Mike

NX 11.0.2.7
Win 7

Re: Thread milling

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

For right handed threads, CW rotating tools will cut bottom up and CCW rotating tools will cut top down.

It is the opposite for left handed threads or if you change from climb to conventional.

This is easy to test by changing the settings Smiley Wink

Stefan Pendl, Systemmanager CAx, HAIDLMAIR GmbH
Production: NX10.0.3, VERICUT 8.1, FBM, MRL 3.1.7 | TcUA 10.1 MP7 Patch 0 (10.1.7.0) | TcVis 10.1
Development: VB.NET, Tcl/Tk Testing: NX12.0 Preparing: NX12.0 | TcVis 11.4

Employees of the customers, together we are strong Smiley Wink
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