HCMA-ST – INNOT insert

HCMA-ST

Single-ended insert for parting, grooving and side turning, with ST chipbreaker and INNOT PVD grades.

ISO M

ISO S

Parting and grooving

PVD

★ IT7225 · IT9215

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Technical data sheet PDFCutting data, sizes and grades

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Blades and blocks for parting and grooving

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INNOT grades

CVD, PVD and cermet for ISO P, M, K, S

Standard ISO designation

Compatible with the insert holders you use

Technical support

We help you choose grade and chipbreaker

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Description

Specifications

Code Width CW Corner radius RE INSL Available grades
HCMA3004-ST 3.0 mm (±0.025) 0.4 15.3 IT7125 – IT7225 – IT9205 – IT9215
HCMA4006-ST 4.0 mm (±0.025) 0.6 15.3 IT7125 – IT7225 – IT9205 – IT9215
HCMA5006-ST 5.0 mm (±0.025) 0.6 15.3 IT7125 – IT7225 – IT9205 – IT9215
HCMA6008-ST 6.0 mm (±0.025) 0.8 15.3 IT7125 – IT7225 – IT9205 – IT9215

CW = cutting width, RE = corner radius, INSL = insert length (mm).

ST chipbreaker data sheet

Operation Parting, external grooving and side turning
ISO material M (stainless steels), S (superalloys and titanium)
Type One cutting edge, optimised locating seat
Tolerance M
Features Variable rake angle, land width and edge curvature to improve the groove finish. Reinforced cutting edge for safer parting; the rake face geometry ensures excellent chip breaking.
Compatible toolholders Toolholders for parting and external grooving, parting blades

Available INNOT grades

Grade ISO Coating Composition Application
IT7125 M PVD AlTiN Universal grade for turning stainless steel in continuous and interrupted cuts. Smooth, low-friction coating, high nano-hardness and excellent oxidation resistance.
IT7225 ★ M PVD AlTiSiN + TiSiN First-choice grade for turning stainless steel. Nano-gradient coating on a sub-micron grain substrate: excellent wear resistance and toughness.
IT9205 S PVD AlTiN + TiSiN + AlCrN Highly wear-resistant grade for superalloys. Uniform sub-micron hard phase and alloying elements for greater reliability; excellent thermal stability and oxidation resistance.
IT9215 ★ S PVD AlTiN + TiSiN + AlCrN Universal grade for turning superalloys. Greater toughness and reliability; the multilayer structure limits cracks and protects the coating from flaking and chipping.

★ Recommended grade for this insert. CVD = chemical vapour deposition coating, PVD = physical vapour deposition coating.

Recommended cutting data

Printable cutting data tableAll the data on this page in an INNOT PDF to keep in the shop.Download PDF
Parting and grooving – cutting speed

Cutting speed Vc (m/min) as a function of feed fn (mm/rev)

Material HB Rm (N/mm²) IT7225 IT9205 IT9215
fn 0.1 fn 0.3 fn 0.5 fn 0.1 fn 0.2 fn 0.3 fn 0.1 fn 0.2 fn 0.3
NON-ALLOY STEELS
C≤0.25% – Annealed 125 428 260 180 120 – – – – – –
0.25<C≤0.55% – Annealed 190 639 200 140 105 – – – – – –
0.25<C≤0.55% – Quenched and tempered 210 708 120 110 100 – – – – – –
C>0.55% – Annealed 190 639 130 120 110 – – – – – –
C>0.55% – Quenched and tempered 300 1013 110 95 70 – – – – – –
Short-chipping – Annealed 220 745 120 105 90 – – – – – –
LOW-ALLOY STEELS
Annealed 175 591 170 135 120 – – – – – –
Quenched and tempered 300 1013 105 90 70 – – – – – –
Quenched and tempered 380 1282 160 80 60 – – – – – –
STAINLESS STEELS
Ferritic / martensitic – Annealed 200 675 200 150 105 – – – – – –
Martensitic – Quenched and tempered 330 1114 150 115 70 – – – – – –
Austenitic – Solution annealed 200 675 185 155 125 – – – – – –
Precipitation-hardening austenitic (PH) 300 1013 165 135 95 – – – – – –
Austenitic-ferritic (duplex) 230 778 145 110 85 – – – – – –
SUPERALLOYS AND TITANIUM
Iron-based – Annealed 200 680 – – – 70 50 – 60 40 –
Iron-based – Aged 280 940 – – – 50 40 – 40 30 –
Nickel / cobalt-based – Annealed 250 840 – – – 50 40 – 40 30 –
Nickel / cobalt-based – Aged 350 1180 – – – 40 30 – 35 25 –
Nickel / cobalt-based – Cast 320 1080 – – – 30 25 – 25 20 –
Aged α+β titanium alloys 375 1260 – – – 50 40 30 40 30 20
β titanium alloys 410 1400 – – – 40 35 30 30 25 20

Guide values for machining with coolant. For parting and internal grooving reduce the speed by 30–50%. When parting, as you approach the centre of the part, reduce the feed by 30%.

Tips for use

  • Parting off: when approaching the centre reduce the feed by 30% for longer life and a better finish; keep the tool overhang to a minimum.
  • External grooving and side turning: with depths over 0.5 mm work in radial passes (up to 0.75 × insert width), retract 0.1 mm, then an axial pass.
  • Wide grooves: make side-by-side stepped plunges, then finish the bottom and the flanks.
  • Face grooves: start from the largest diameter and move inwards; for finishing machine the bottom and the outer diameter first, then the inner one.
  • Internal grooves: work from the inside outwards to help the chip out.