Iscar CNMG120408 NR IC907 Carbide Turning Insert – Diamond 80°, R0.8, NR chipbreaker CNMG432

Group P — Carbon & alloy steels

1. Low-carbon / structural steel (HB ≤ 200)
   Vc: 180–320 m/min; f: 0.10–0.40 mm/rev; ap ≤ 4.0 mm
2. Alloy / quenched-and-tempered steel (HB 200–330)
   Vc: 120–240 m/min; f: 0.10–0.35 mm/rev; ap ≤ 3.0 mm

Raise Vc for continuous cuts; lower it and pick a tougher chipbreaker for interrupted cuts.

Group M — Stainless steel

1. Ferritic / martensitic (HB ≤ 220)
   Vc: 120–200 m/min; f: 0.08–0.30 mm/rev; ap ≤ 3.0 mm
2. Austenitic 304 / 316 (work-hardening)
   Vc: 90–160 m/min; f: 0.08–0.25 mm/rev; ap ≤ 2.5 mm

Flood coolant; avoid too low a feed to prevent work hardening.

Figures are general reference ranges by ISO material group — adjust for tool geometry, machine rigidity and cooling. For exact recommendations refer to the manufacturer's data or contact us for a quote.