RCMX – INNOT insert

RCMX

Positive round insert (RCMX) for profiling and roughing of steel profiles, with INNOT CVD grades.

ISO P
Profiling
CVD
★ IT8115 · IT8225

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Technical data sheet PDFCutting data, sizes and grades

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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

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We help you choose grade and chipbreaker

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Description

ISO specifications

ISO DIAMETER (IC) AVAILABLE GRADES CHIPBREAKER
RCMX1003MO Ø10 IT8105 – IT8115 – IT8125 – IT8225 Universal (MO)
RCMX1204MO Ø12 IT8105 – IT8115 – IT8125 – IT8225 Universal (MO)
RCMX1606MO Ø16 IT8105 – IT8115 – IT8125 – IT8225 Universal (MO)
RCMX2006MO Ø20 IT8105 – IT8115 – IT8125 – IT8225 Universal (MO)
RCMX2507MO Ø25 IT8105 – IT8115 – IT8125 – IT8225 Universal (MO)
RCMX3209MO Ø32 IT8105 – IT8115 – IT8125 – IT8225 Universal (MO)

Universal (MO) chipbreaker data sheet

Operation Profiling
ISO material P (non-alloy, alloy and tool steels)
Tolerance M
Features Universal chipbreaker for profiling: the high-strength cutting edge ensures great reliability and is the first choice for roughing profiles. 7° positive round insert (RCMX) with cylindrical hole: very strong circular cutting edge, for profiling, copying of radii and roughing of profiles; it is the typical choice for turning railway wheels. MRGC and MRDC type toolholders.

Available INNOT grades

Grade ISO Coating Composition Application
IT8105 P CVD TiN + MT-TiCN + Al₂O₃ Turning of steel in stable conditions. High hot hardness, resistance to wear and plastic deformation.
IT8115 ★ P CVD TiN + MT-TiCN + Al₂O₃ Continuous and lightly interrupted cuts. Finishing and semi-finishing of carbon and alloy steels.
IT8125 P CVD TiN + MT-TiCN + Al₂O₃ Interrupted and continuous cuts on steel. The reinforced substrate limits plastic deformation at high temperature.
IT8225 ★ P CVD TiN + MT-TiCN + Al₂O₃ First-choice grade for steel, very versatile. Multilayer coating with excellent wear resistance and toughness.

★ Recommended grade for this chipbreaker. CVD = chemical vapour deposition coating. ISO P = steels.

Recommended cutting data

Printable cutting data tableAll the data on this page in an INNOT PDF to keep in the shop.Download PDF
External turning of steels (ISO P) – round insert

Cutting speed by grade: values of the INNOT CVD grades on steels. Feed and depth of cut depend on the insert diameter: see the table below.

Material Condition Vc (m/min) by grade
Structural steels ≤ 180 HB
(S235, C45…)		 Stable IT8105: 230 – 400
IT8115: 215 – 360
IT8125: 190 – 355
IT8225: 205 – 375
Structural steels ≤ 180 HB
(S235, C45…)		 Average IT8105: 225 – 380
IT8115: 200 – 380
IT8125: 185 – 350
IT8225: 195 – 360
Structural steels ≤ 180 HB
(S235, C45…)		 Difficult IT8125: 185 – 320
IT8225: 195 – 360
Carbon and alloy steels 180 – 280 HB
(41Cr4, 42CrMo4…)		 Stable IT8105: 230 – 400
IT8115: 215 – 360
IT8125: 190 – 355
IT8225: 205 – 375
Carbon and alloy steels 180 – 280 HB
(41Cr4, 42CrMo4…)		 Average IT8105: 225 – 430
IT8115: 200 – 405
IT8125: 185 – 350
IT8225: 195 – 360
Carbon and alloy steels 180 – 280 HB
(41Cr4, 42CrMo4…)		 Difficult IT8125: 185 – 350
IT8225: 195 – 360
Quenched and tempered steels ≥ 280 HB Stable IT8105: 220 – 400
IT8115: 205 – 380
Quenched and tempered steels ≥ 280 HB Average IT8105: 220 – 380
IT8115: 205 – 360

Starting values for profiling and roughing. Conditions not listed are not recommended for that material.

Internal turning (boring) of steels (ISO P) – round insert

Starting values for internal turning with a boring bar, derived from this insert's external turning data: cutting speed −15%, feed −20%.

Material Condition Vc (m/min) by grade
Structural steels ≤ 180 HB
(S235, C45…)		 Stable IT8105: 195 – 340
IT8115: 185 – 305
IT8125: 160 – 300
IT8225: 175 – 320
Structural steels ≤ 180 HB
(S235, C45…)		 Average IT8105: 190 – 325
IT8115: 170 – 325
IT8125: 155 – 300
IT8225: 165 – 305
Structural steels ≤ 180 HB
(S235, C45…)		 Difficult IT8125: 155 – 270
IT8225: 165 – 305
Carbon and alloy steels 180 – 280 HB
(41Cr4, 42CrMo4…)		 Stable IT8105: 195 – 340
IT8115: 185 – 305
IT8125: 160 – 300
IT8225: 175 – 320
Carbon and alloy steels 180 – 280 HB
(41Cr4, 42CrMo4…)		 Average IT8105: 190 – 365
IT8115: 170 – 345
IT8125: 155 – 300
IT8225: 165 – 305
Carbon and alloy steels 180 – 280 HB
(41Cr4, 42CrMo4…)		 Difficult IT8125: 155 – 300
IT8225: 165 – 305
Quenched and tempered steels ≥ 280 HB Stable IT8105: 185 – 340
IT8115: 175 – 325
Quenched and tempered steels ≥ 280 HB Average IT8105: 185 – 325
IT8115: 175 – 305

With a boring bar overhang above 3 times the diameter (steel bar) or 5 times (carbide or anti-vibration bar), reduce speed and feed further. Use the bar's internal coolant to clear the chips.

External turning: feed and depth of cut by insert diameter

With round inserts the chip thickness decreases with the depth of cut: with light cuts you can use the upper part of the feed range.

Insert diameter (IC) ap (mm) fn (mm/rev)
Ø10 0.50 – 2.50 0.15 – 0.35
Ø12 0.60 – 3.00 0.15 – 0.40
Ø16 0.80 – 4.00 0.20 – 0.50
Ø20 1.00 – 5.00 0.25 – 0.60
Ø25 1.30 – 6.30 0.30 – 0.70
Ø32 1.60 – 8.00 0.35 – 0.80

Reduce the feed in fillets and copying sections. Maximum depth of cut about one quarter of the diameter (IC).

Internal turning (boring): feed and depth of cut by insert diameter

Starting values for internal turning with a boring bar, derived from this insert's external turning data: cutting speed −15%, feed −20%, maximum depth of cut −40%.

Insert diameter (IC) ap (mm) fn (mm/rev)
Ø10 0.50 – 1.50 0.12 – 0.28
Ø12 0.60 – 1.80 0.12 – 0.32
Ø16 0.80 – 2.40 0.16 – 0.40
Ø20 1.00 – 3.00 0.20 – 0.48
Ø25 1.30 – 3.80 0.24 – 0.56
Ø32 1.60 – 4.80 0.28 – 0.64

With a boring bar overhang above 3 times the diameter (steel bar) or 5 times (carbide or anti-vibration bar), reduce speed and feed further. Use the bar's internal coolant to clear the chips.

For complex profiles or materials other than steel, send us the material, hardness and part drawing: we will send you starting values for your case.