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Thread Turning Technical Section
Important Points about CPT Threading Inserts
1.
In most thread forms internal and external threads have different depth and radii, thus tools are not interchangeable
4.
Profiles of CPT internal & external threading inserts are precision ground to ensure accurate thread geometry when used in their corresponding toolholders.
2.
The Insert relief angle of a standard CPT external toolholder is 10˚; for an internal toolholder it is 15˚. This 5º difference is to provide additional necessary radial clearance.
Using internal inserts with an external holder will result in distortion of angle and insert geometry.
5.
Insert and toolholder should always match. An IN-RH insert must be used with an IN-RH toolholder. No mismatch is allowed.
3.
Our built-in relief angles ensure automatic insert flank angle clearance.
Flank Clearance Angle
A04-6
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