TURNING INSERT - POSITIVE_CCMT

General information

• Manufacturer: Dormer Pramet
• Product family: CCMT positive turning insert (ISO Positive, carbide inserts, C... shape)
• Measurement standard: metric
• Machining operations: fine-finishing, finishing and medium machining
• Applications: external turning, facing and internal turning (boring)

Grade overview

• T9315, T9325, T9335, T9415, T9425: MT-CVD coated, functionally graded WC-Co carbide, mainly for steels (ISO P05 to P45 depending on grade); T9325 also covers M10 to M30
• T7325, T7335: MT-CVD coated, functionally graded WC-Co carbide for stainless steels (M10 to M25 and M20 to M40); T7325 with NF2 also covers S10 to S25
• T8315, T8330, T8430: PVD coated fine grained WC-Co carbide; T8315 M05 to M20 or K05 to K25, T8330 P25 to P40, M20 to M35 and K20 to K40, T8430 P20 to P40 and M20 to M35
• T8415: grade listed for steel and stainless steel (FM), stainless steel and high-temperature alloys (NF2), and steel and cast iron (UR)
• T6310: PVD coated extra fine grained WC-Co carbide for stainless steels and super-alloys (M01 to M15, S01 to S15)
• H07: uncoated WC-Co carbide for super-alloys (S01 to S20)
• TT010, TT310: cermet grades for steels; TT010 uncoated (P01 to P10), TT310 PVD coated (P10 to P25)

Usage notes

• Keep the depth of cut within the APMN to APMX range of the chosen chipbreaker for good chip control.
• Use a toolholder or boring bar with a seat for 80° rhombic, 7° clearance inserts of matching size, and tighten the clamping screw correctly.
• Apply coolant according to the workpiece material and operation.
• Index to a fresh cutting corner when flank wear, built-up edge or chipping affects surface finish or size.

How to read the order code

Example: CCMT 060204E-FM:T8330

• C: insert shape, rhombic 80°
• C: clearance angle 7°
• M: tolerance class M
• T: insert type, single-sided with fixing hole
• 06: insert size (cutting edge length 6.4 mm)
• 02: thickness code (S 2.38 mm)
• 04: corner radius 0.4 mm (02 = 0.2 mm)
• E: rounded cutting edges
• FM: chipbreaker
• T8330: grade

CCMT is a Dormer Pramet carbide insert family in the ISO Positive turning range (C... shape). The single-sided insert combines an 80° rhombic corner, 7° clearance, ISO tolerance class M and a central fixing hole for clamping in the toolholder. Its positive geometry keeps cutting forces low, which makes it well suited to external turning, facing and internal turning with boring bars, especially for small and medium-sized parts, slender workpieces and less rigid set-ups. The series covers fine-finishing, finishing and medium machining across ISO material groups P, M, K and S.

Key features

• 80° rhombic shape (C) with 7° clearance (C) for a positive, low-force cut
• Listed models: IC 6.35 mm, thickness 2.38 mm, cutting edge length 6.4 mm, fixing hole diameter 2.8 mm
• Corner radius 0.2 mm (060202) or 0.4 mm (060204)
• Six chipbreakers: FF2, FF, FM, NF2, RF and UR, all with rounded cutting edges (E)
• Grades in MT-CVD and PVD coated WC-Co carbide, uncoated carbide H07 and cermet (TT010 uncoated, TT310 PVD coated)
• Primary use in steel (P), stainless steel (M), cast iron (K) and high-temperature alloys (S), with non-ferrous metals (N) as possible use for selected grades
• Indexing accuracy to ISO tolerance class M for consistent tool positioning

The CCMT insert is a single-sided, 80° rhombic positive insert with a 7° clearance on the flanks, a central fixing hole and a chipbreaker on the top face. The corner radius is at the cutting corner, and the cutting edge length is measured along the side of the rhombus.

• IC: inscribed circle diameter, 6.35 mm
• L: cutting edge length, 6.4 mm
• S: insert thickness, 2.38 mm
• D1: fixing hole diameter, 2.8 mm
• RE: corner radius, 0.2 mm to 0.4 mm
• APMN / APMX: minimum / maximum depth of cut, 0.2 mm to 3 mm
• Included angle 80°, clearance angle 7°

Choosing the chipbreaker

• FF2: sharp edge, slightly positive rake without T-land; first choice for fine-finishing of steels, also for cast irons. APMX 1.5 mm with RE 0.2 mm, 2.5 mm with RE 0.4 mm.
• FF: for fine machining of steels; APMX 2 mm.
• FM: versatile, positive rake with a narrow positive T-land; first choice for finishing of steels, also for stainless steels. APMX 1 mm with RE 0.2 mm, 1.5 mm with RE 0.4 mm.
• NF2: sharp, positive rake without T-land; first choice for finishing of stainless steels, also for super-alloys. APMX 1.5 mm.
• UR: versatile, positive rake without T-land; first choice for finishing of cast irons, also for steels. APMX 2 mm.
• RF: listed in grade T7335 for medium machining, APMN 1 mm to APMX 3 mm.

Choosing the corner radius

RE 0.2 mm (060202) suits small depths of cut, low cutting forces and small part details. RE 0.4 mm (060204) gives a stronger cutting corner and, with FF2, a larger maximum depth of cut.

Choosing the grade

• Steel (P): T9315, T9415, T9325, T9335, T9425, T8430, T8330; cermet TT010 or TT310 for finishing
• Stainless steel (M): T7325, T7335, T8315, T9325, T6310, with FM or NF2
• Cast iron (K): T8315 with UR, T8330, T9425
• High-temperature alloys (S): H07, T6310, T7325 with NF2

Within one ISO range, a lower number means higher wear resistance for continuous cuts and higher cutting speeds, while a higher number means more toughness for interrupted cuts or unstable conditions.