ISO insert format

RPMT inserts

Round milling insert. We make 7 RPMT sizes, from RPMT08T2M0 to RPMT1606M0. Grade, coating and chipbreaker are matched to your material and operation.

RPMT1003M0: illustration of a round insertRPMT1003M0
Illustration drawn from the designation, not to scale. Colour depends on the coating.
Reading the code

What RPMT means

The first four letters of an ISO 1832 designation give the shape, the clearance angle, the tolerance class, and the hole and chipbreaker.

CodeFeatureMeaning
RShapeRound
PClearance angle11° (positive insert)
MTolerance classClass M
THole and chipbreakerHole countersunk on one side, chipbreaker on one face

Where RPMT inserts are used

Round milling inserts are used in profile (copy) milling, face milling and high-feed cutters; the round edge is strong.

RPMT is a positive (11° clearance) round milling insert. It has a countersunk hole for a clamping screw. The chipbreaker is on one face only. The positive geometry keeps the cutting forces down.

Use the insert format, size and corner configuration specified by the cutter manufacturer; check the pocket and clamping system before ordering.

Questions

What does RPMT mean?
It is an ISO 1832 code. R = Shape: Round; 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 RPMT sizes do you make?
7 sizes, from RPMT08T2M0 to RPMT1606M0. Grade, coating and chipbreaker are confirmed with each quotation.
How do I read RPMT1003M0?
RPMT = format; 10 = Diameter code (about 10 mm); M0 = Corner (round insert, metric diameter).

Related formats

Guides: ISO material groups · Inserts for stainless steel

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