SCMT inserts
Square turning insert. We make 5 SCMT sizes, from SCMT09T304 to SCMT120412. Grade, coating and chipbreaker are matched to your material and operation.
What SCMT 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 |
|---|---|---|
| S | Shape | Square |
| C | Clearance angle | 7° (positive insert) |
| M | Tolerance class | Class M |
| T | Hole and chipbreaker | Hole countersunk on one side, chipbreaker on one face |
Where SCMT inserts are used
The 90° corner is very strong and a square insert has four corners per face. In holders with a 45° or 75° entering angle it is used for roughing, facing and chamfering.
SCMT is a positive (7° clearance) square turning insert. It has a countersunk hole for a clamping screw. 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 SCMT inserts of that size.
Questions
- What does SCMT mean?
- It is an ISO 1832 code. S = Shape: Square; C = Clearance angle: 7° (positive insert); M = Tolerance class: Class M; T = Hole and chipbreaker: Hole countersunk on one side, chipbreaker on one face.
- Which SCMT sizes do you make?
- 5 sizes, from SCMT09T304 to SCMT120412, with inscribed circles from 9.525 to 12.7 mm. Grade, coating and chipbreaker are confirmed with each quotation.
- How do I read SCMT120408?
- SCMT = format; 12 = Cutting edge length code (about 12 mm); 04 = Thickness (4.76 mm); 08 = Corner (0.8 mm nominal).
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