Rockwell Automation 8520 9/Series CNC Lathe User Manual
Page 624
Thread Cutting
Chapter 25
25-24
Figure 25.15
Multipass Thread Cutting Infeed Parameters
Finishing
allowance
Finishing
allowance
Finishing
allowance
Finishing
allowance
K
K
K
K
Cutting
tool
Cutting
tool
Cutting
tool
Cutting
tool
P1
Single edge
cutting
P3
Single edge cutting
P4
Double edge
cutting
P2
Double edge
cutting
D
D
D
D
D
D
D
D
D
Ö
2
D
Ö
4
D
Ö
6
D
Ц
2Ц2
D
Ö
2
D
Ö
4
D
Ö
3
D(
Ц
2+
Ц
4)
2
D(
Ц
4+
Ц
6)
2
D
’
D’is the remaining material
to reach K -- finish allowance.
D
’
D’is the remaining material to reach
K -- finish allowance. Note 2 equal
passes are made equal to half D’
Infeed Reference
Point
Infeed Reference
Point
Infeed Reference
Point
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