DNMG cast iron – INNOT insert

DNMG cast iron

55° negative insert for turning cast iron, with universal double-sided chipbreaker and CVD grade IT6115.

ISO K
Medium – roughing
CVD
★ IT6115

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Technical data sheet PDFCutting data, sizes and grades

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Fits on
93° profiling toolholders

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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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Description

ISO specifications

ISO RADIUS (RE) AVAILABLE GRADES CHIPBREAKER
DNMG1504 0.4 – 0.8 – 1.2 IT6115 Universal cast iron
DNMG1506 0.4 – 0.8 – 1.2 IT6115 Universal cast iron

Universal cast iron chipbreaker data sheet

Operation Medium – roughing
ISO material K (grey cast iron)
Tolerance M
Features Universal chipbreaker for machining ISO K materials. Double-sided insert, particularly suitable for turning grey cast iron, with a wide application range. 55° rhombic shape: a slimmer tip than the 80°, ideal for profiling, copy turning and contour turning with access to shoulders.

Available INNOT grades

Grade ISO Coating Composition Application
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.

★ Recommended grade for this chipbreaker. CVD = chemical vapour deposition coating. ISO K = cast irons.

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 cast iron (ISO K)

Recommended cutting data for grey cast iron, strength ≤ 350 MPa.

Material Condition Vc (m/min) by grade fn (mm/rev) ap (mm)
Grey cast iron
(GG20, GG30 – EN-GJL-200, EN-GJL-300)		 Stable IT6115: 165 – 300 0.25 – 0.60 1.60 – 5.00
Grey cast iron
(GG20, GG30 – EN-GJL-200, EN-GJL-300)		 Average IT6115: 165 – 300 0.25 – 0.55 1.60 – 5.00
Grey cast iron
(GG20, GG30 – EN-GJL-200, EN-GJL-300)		 Difficult IT6115: 165 – 300 0.25 – 0.50 1.60 – 5.00

Guide values. IT6115 can also be used for roughing high-strength steels.

Internal turning (boring) of cast iron (ISO K)

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%. Negative inserts are mounted on boring bars for bores from about Ø 25 mm upwards (Ø 32–40 mm for the larger sizes).

Material Condition Vc (m/min) by grade fn (mm/rev) ap (mm)
Grey cast iron
(GG20, GG30 – EN-GJL-200, EN-GJL-300)		 Stable IT6115: 140 – 255 0.20 – 0.48 1.60 – 3.00
Grey cast iron
(GG20, GG30 – EN-GJL-200, EN-GJL-300)		 Average IT6115: 140 – 255 0.20 – 0.44 1.60 – 3.00
Grey cast iron
(GG20, GG30 – EN-GJL-200, EN-GJL-300)		 Difficult IT6115: 140 – 255 0.20 – 0.40 1.60 – 3.00

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.