DNMA inserts
55° rhombic turning insert. We make 4 DNMA sizes, from DNMA150408 to DNMA150612. Grade, coating and chipbreaker are matched to your material and operation.
What DNMA 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 |
|---|---|---|
| D | Shape | 55° rhombic |
| N | Clearance angle | 0° (negative insert) |
| M | Tolerance class | Class M |
| A | Hole and chipbreaker | Cylindrical hole, no chipbreaker |
Where DNMA inserts are used
The 55° corner reaches into profiles, tapers and recesses that an 80° corner cannot, but the corner is weaker; use it where the contour needs that clearance.
DNMA is a negative 55° rhombic turning insert. It has a cylindrical hole. It has no chipbreaker (a flat top). Flat-top inserts are common in cast iron, whose chips break on their own.
Choose the size for your depth of cut, the corner radius for the feed and finish, and a holder made for DNMA inserts of that size.
Questions
- What does DNMA mean?
- It is an ISO 1832 code. D = Shape: 55° rhombic; N = Clearance angle: 0° (negative insert); M = Tolerance class: Class M; A = Hole and chipbreaker: Cylindrical hole, no chipbreaker.
- Which DNMA sizes do you make?
- 4 sizes, from DNMA150408 to DNMA150612, all with a 12.7 mm inscribed circle. Grade, coating and chipbreaker are confirmed with each quotation.
- How do I read DNMA150408?
- DNMA = format; 15 = Cutting edge length code (about 15 mm); 04 = Thickness (4.76 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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