TPMR inserts
60° triangular turning insert. We make 4 TPMR sizes, from TPMR160304 to TPMR160408. Grade, coating and chipbreaker are matched to your material and operation.
What TPMR means
The first four letters of an ISO 1832 designation give the shape, the clearance angle, the tolerance class, and the hole and chipbreaker.
| Code | Feature | Meaning |
|---|---|---|
| T | Shape | 60° triangular |
| P | Clearance angle | 11° (positive insert) |
| M | Tolerance class | Class M |
| R | Hole and chipbreaker | No hole, chipbreaker on one face |
Where TPMR inserts are used
The 60° triangle has three corners per face and a long cutting edge for its size: a compromise between corner strength and access.
TPMR is a positive (11° clearance) 60° triangular turning insert. It has no hole and is held by a clamp or wedge. The chipbreaker is on one face only. Positive inserts cut with lower forces, which suits finishing, small diameters, internal turning and less rigid setups.
Choose the size for your depth of cut, the corner radius for the feed and finish, and a holder made for TPMR inserts of that size.
Questions
- What does TPMR mean?
- It is an ISO 1832 code. T = Shape: 60° triangular; P = Clearance angle: 11° (positive insert); M = Tolerance class: Class M; R = Hole and chipbreaker: No hole, chipbreaker on one face.
- Which TPMR sizes do you make?
- 4 sizes, from TPMR160304 to TPMR160408, all with a 9.525 mm inscribed circle. Grade, coating and chipbreaker are confirmed with each quotation.
- How do I read TPMR160308?
- TPMR = format; 16 = Cutting edge length code (about 16 mm); 03 = Thickness (3.18 mm); 08 = Corner (0.8 mm nominal).
Related formats
Guides: CNMG vs WNMG vs DNMG vs TNMG · ISO material groups · Inserts for stainless steel
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