QPMB-RM – INNOT insert

QPMB-RM

Double-ended full-radius insert for profile grooving, with RM chipbreaker and INNOT CVD and PVD grades.

ISO P

ISO M

ISO K

ISO S

Profiling

Full radius

★ IT8225 · IT7225

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Technical data sheet PDFCutting data, sizes and grades

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Fits on
Face grooving toolholdersBlades 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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For stock orders throughout Italy

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Description

Specifications

Code Width CW Corner radius RE INSL Available grades
QPMB2010-RM 2.0 mm (+0.05/0) 1.0 16.0 IT8225 – IT6115 – IT7115 – IT7125 – IT7225
QPMB3015-RM 3.0 mm (+0.05/0) 1.5 21.0 IT8225 – IT6115 – IT7115 – IT7125 – IT7225
QPMB4020-RM 4.0 mm (+0.05/0) 2.0 21.0 IT8225 – IT6115 – IT7115 – IT7125 – IT7225
QPMB5025-RM 5.0 mm (+0.05/0) 2.5 26.0 IT8225 – IT6115 – IT7115 – IT7125 – IT7225
QPMB6030-RM 6.0 mm (+0.05/0) 3.0 26.0 IT8225 – IT6115 – IT7115 – IT7125 – IT7225

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

RM chipbreaker data sheet

Operation Profile grooving, copy turning and undercut grooves
ISO material P (steels), M (stainless steels), K (cast irons), S (superalloys and titanium)
Type Two cutting edges, full-radius tip
Tolerance M
Features Chip control in all directions: suitable for profiles and copy turning with a higher surface finish. Also used in 45° undercut grooving tools.
Compatible toolholders Toolholders for external grooves, face grooves and 45° undercut grooves, boring bars for internal grooves

Available INNOT grades

Grade ISO Coating Composition Application
IT8225 ★ P CVD TiN + MT-TiCN + Al₂O₃ First-choice grade for steel, very versatile. Multilayer coating with excellent wear resistance and toughness.
IT6115 K CVD TiN + MT-TiCN + Al₂O₃ First-choice grade for turning cast iron. Thicker black CVD coating with special post-coating treatment: excellent wear resistance and toughness. Also suitable for roughing high-strength steels.
IT7115 M · S PVD AlTiSiN + TiSiN Sub-micron grain substrate with nano-gradient coating: excellent wear and oxidation resistance, great stability. Suitable for titanium alloys and superalloys.
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.

★ 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) IT8225 IT7225 IT6115
fn 0.1 fn 0.3 fn 0.5 fn 0.1 fn 0.3 fn 0.5 fn 0.1 fn 0.3 fn 0.5
NON-ALLOY STEELS
C≤0.25% – Annealed 125 428 280 200 130 260 180 120 – – –
0.25<C≤0.55% – Annealed 190 639 240 160 115 200 140 105 – – –
0.25<C≤0.55% – Quenched and tempered 210 708 130 115 100 120 110 100 – – –
C>0.55% – Annealed 190 639 145 130 115 130 120 110 – – –
C>0.55% – Quenched and tempered 300 1013 115 100 80 110 95 70 – – –
Short-chipping – Annealed 220 745 130 115 100 120 105 90 – – –
LOW-ALLOY STEELS
Annealed 175 591 280 200 130 170 135 120 – – –
Quenched and tempered 300 1013 115 100 80 105 90 70 – – –
Quenched and tempered 380 1282 170 90 70 160 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 – – –
CAST IRONS
Ferritic malleable 200 400 – – – – – – 220 160 80
Pearlitic malleable 260 700 – – – – – – 115 90 65
Grey – low strength 180 200 – – – – – – 260 220 150
Grey – high strength / austenitic 245 350 – – – – – – 240 200 130
Ferritic ductile 155 400 – – – – – – 160 130 80
Pearlitic ductile 265 700 – – – – – – 145 110 80
Compacted graphite iron (CGI) 230 400 – – – – – – 150 120 90

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.