Grey cast iron Special CBN inserts

Full name: Grey cast iron Special CBN inserts

Machining Hardness Range: About HT200/250

Machining Materials: Grey Cast iron, Iron-based sintered alloy

Machining Type: Finishing, Semi-finishing, Roughing

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Machining gray cast iron, Turning gray cast iron Recommend inserts


CNMN/CNGN	SNMN/SNGN	SCGN	WNGA	TNGA	CNGA

Application fields

Material: Gray cast iron, etc.;

Industry: Automotive industry;

Workpieces: Brake discs, Brake drums, Pulleys, Flywheels, Clutch pressure plates, Air-conditioning compressors, etc.

Cutting Parameters

Machining material	Recommended cutting parameters			CBN insert Grade
Machining material	Cutting speed VC(m/min)	Cutting Depth ap (mm)	Feed Rate Fr(mm/r)	CBN insert Grade
Grey cast iron	400-1200(Roughing)	1-10	0.2-1	BN-S30, BN-S300
Grey cast iron	600-2000(Finishing)	≤1	0.05-0.3	BN-S30, BN-S300
Grey cast iron	300-1500(Finishing)	≤1	0.05-0.3	BN-K20, BNK30

Application cases

Workpiece: Brake drum
Material: Gray cast iron
Insert Type: BNK30 WNGA080408
Cutting parameters: Vc=650m/min, Fr=0.2mm/r, ap=0.5mm
Processing method: dry cutting
Insert grade	Tool Life/edge	Roughness
Halnn BNK30	120pcs	Ra1.6
Some brand CBN	70pcs	Ra2.0

Workpiece: Bear of air conditioner compressor
Material: Gray cast iron
Insert Type: BNK30 WNGA080408
Cutting parameters: Vc=600m/min, Fr=0.25mm/r, ap=0.3mm
Processing method: dry cutting
Insert grade	Cutting Speed	Tool Life/edge
Halnn BNK30	600m/min	500pcs
Coated carbide inserts	330m/min	80pcs

Workpiece: Pulley
Material: Gray cast iron
Insert Type: BN-K20 CNGA120408
Cutting parameters: Vc=550-700m/min, Fr=0.25mm/r, ap=0.3mm
Processing method: dry cutting
Insert grade	Roughness	Tool Life/edge
Halnn BNK20	Ra1.6	200pcs
Some brand CBN	Ra3.2	35pcs

Workpiece: Brake Disc
Material: Gray cast iron
Insert Type: BN-S300 SCGN090408
Cutting parameters: Vc=800m/min, Fr=0.2mm/r, ap=0.25mm
Processing method: dry cutting
Insert grade	Insert Type	Cutting Speed	Tool Life/edge
Halnn BN-S300	SCGN090408	800m/min	300pcs
Coated carbide inserts	CNMG120408	300m/min	15pcs

Workpiece: Brake Disc
Material: Gray cast iron(HT250)
Hardness: HB170~210
Insert Type: BN-S30 CNMN120712
Cutting parameters: Vc=500m/min, Fr=0.55mm/r, ap=2mm
Processing method: dry cutting
Insert grade	Cutting Speed	Tool Life/edge	Efficiency
Halnn BN-S30	500m/min	200pcs	Improved 1.8 times
Carbide Insert	180m/min	30pcs	------

Workpiece: Brake Drum
Material: Gray cast iron(HT250)
Hardness: HB170~210
Insert Type: BN-S30 CNMN120716
Cutting parameters: Vc=380/min, Fr=0.65mm/r, ap=2.5mm
Processing method: dry cutting
Insert grade	Cutting Speed	Tool Life/edge	Efficiency
Halnn BN-S30	380m/min	95pcs	Improved 1.5 times
Coated Carbide Insert	150m/min	15pcs	------