Thread milling (cycle 262) – HEIDENHAIN iTNC 530 (340 49x-03) Pilot User Manual
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Cyc
les for Drilling, Tappi
n
g and
Thread Mi
lling
THREAD MILLING (Cycle 262)
8
Pre-position to the center of the hole with R0
8
CYCL DEF: Select Cycle 262 THREAD MILLING
8
Nominal diameter of the thread: Q335
8
Pitch: Q239
The algebraic sign differentiates between right-hand and left-hand
threads:
Right-hand thread: +
Left-hand thread: –
8
Thread depth: distance between the workpiece surface and the end
of the thread: Q201
8
Number of threads per step: Q355
8
Feed rate for pre-positioning: Q253
8
Type of milling: Q351
Climb: +1
Up-cut: –1
8
Set-up clearance: Q200
8
Workpiece surface coordinate: Q203
8
2. Set-up clearance: Q204
8
Feed rate for milling: Q207
Note that the TNC makes a compensating movement in the
tool axis before the approach movement. The length of the
compensating motion depends on the thread pitch. Ensure
sufficient space in the hole!