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TECHNICAL INFORMATION
HELICAL MILLING - CUTTING DIRECTION
To maximize performance, the Helical Milling strategy must be applied with the correct cutting
direction. For holemaking operations such as drilling and boring, CCLW is recommended for
climb milling to keep the chip formation from thick to thin.
ØD
C
Ø
Counterclockwise
direction (CCLW)
D = Milling Cutter Diameter
C = Hole Diameter
HELICAL MILLING - FEED RATE COMPENSATION
For Helical Milling, we need to compensate the feed rate, to keep the chip thickness like the
same when performing a Linear Milling operation.
LINEAR MILLING
CIRCULAR MILLING
P
ØD
Vf linear
ØC
Vf circular
D1
D
C
D = 16
C = 30
Vf linear = fz x RPM x Z
RPM = 3600 rev/min
fz = 0.05 mm/tooth
Vf circular = ((C-D)/C) x Vf linear
Feed Rate Compensation
Z = 4 ((C-D/C) * Linear feed Rate
Vf linear = 720 mm/min (14/30)*720mm/min
Climb Milling
((30-16)/30)*720mm/min
0.466*720mm/min = 366 mm/min
325