SPMT inserts
Square drilling insert. We make 3 SPMT sizes, from SPMT060304 to SPMT180616. Grade, coating and chipbreaker are matched to your material and operation.
What SPMT 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 |
| P | Clearance angle | 11° (positive insert) |
| M | Tolerance class | Class M |
| T | Hole and chipbreaker | Hole countersunk on one side, chipbreaker on one face |
Where SPMT inserts are used
Inserts of this format are used in indexable drills. The drill maker states which insert goes in the centre pocket and which in the peripheral pocket; some drills take the same insert in both.
SPMT is a positive (11° clearance) square drilling insert. It has a countersunk hole for a clamping screw. The chipbreaker is on one face only.
Send us the drill model and we confirm the insert.
Questions
- What does SPMT mean?
- It is an ISO 1832 code. S = Shape: Square; P = Clearance angle: 11° (positive insert); M = Tolerance class: Class M; T = Hole and chipbreaker: Hole countersunk on one side, chipbreaker on one face.
- Which SPMT sizes do you make?
- 3 sizes, from SPMT060304 to SPMT180616. Grade, coating and chipbreaker are confirmed with each quotation.
- How do I read SPMT060304?
- SPMT = format; 06 = Cutting edge length code (about 6 mm); 04 = Corner (0.4 mm nominal).
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