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WIDIA ™ • Inserts for Machining Aluminium
Non-Ferrous Materials • Miscellaneous Workpiece Materials
„ 
Additional cutting speed recommendations for miscellaneous workpiece materials
Copper-, Brass-, Zinc-Based on a Machinability
Index Range of 70–100
N4
grade
250
speed — m/min
500
750
275
HWK10/HWK15 260
Material
Group grade
N5 HCK10
speed — m/min
250
500
750
Material
Group grade
N6 HCK10
250
speed — m/min
500
750
grade
N7 HCK10
widia.com
1000
speed — m/min
250
500
750
Starting Conditions
m/min
1000
Starting Conditions
m/min
170
speed — m/min
Tin Alloys, Cast: ASTM 823, Alloys 1, 2, 3, 11
grade
m/min
200
MMCs (Aluminium-Based Metal Matrix Composites)
Material
Group
1000
Starting Conditions
275
Carbon and Graphite Composites:
Brush Alloys, Kevlar, and Graphite (280–400 HB) (30–43 HRC)
N8
m/min
HCK10
Nylon, Plastics, Rubbers, Phenolics, Resins, Fibreglass, and Glass
Material
Group
1000
Starting Conditions
250
500
750
1000
Starting Conditions
m/min
HCK10 215
HWK10/HWK15 180
B153
Material
Group