Owner's manual

83
4
.
T
rou
bl
es
h
oot
i
n
g
–
Th
rea
d
m
illi
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g
Problem Cause Solution
Rapid wear causing poor surface
 nish or out of
tolerance.
• Cutting speed too high
• Insuf cient wear resistance
• Feed, f
z
, too low
Excessive wear causing short tool
life.
• Vibration
• Re-cutting of chips
• Burr formation on component
• Poor surface  nish
• Heat generation
• Excessive noise
Uneven wear causing corner dam-
age.
• Tool run-out
• Vibration
• Short tool life
• Bad surface  nish
• High noise level
• Radial forces too high
Flank wear
• Reduce cutting speed, v
c
• Increase feed, f
z
• Increase feed, f
z
• Reduce speed
• Down milling
• Evacuate chips effectively using
compressed air
• Check recommended cutting data
• Check chuck and collet
• Minimize tool overhang
• Fewer teeth in cut
• Split axial cutting depth, a
p
, into
more than one pass
• Reduce feed, f
z
• Reduce cutting speed, v
c
• HSM requires shallow passes
• Improve clamping of tool and work-
piece