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 |
Cutting speed VC(m/min) | Cutting Depth ap (mm) | Feed Rate Fr(mm/r) |
Grey cast iron | 400-1200(Roughing) | 1-10 | 0.2-1 | BN-S30, BN-S300 |
600-2000(Finishing) | ≤1 | 0.05-0.3 |
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 | ------ |
Brake disc machining video
WhatsApp:8613271562251 
Email:service@halnn-group.com 
Language 
Cast Iron Materials CBN Tools
