HEIDENHAIN TNC 426 (280 476) Pilot User Manual

Page 51

Cycles

for

Machining

Holes

and

Threads

THREAD MILLING AND COUNTERSINKING (263)

Pre-position above the hole center with R0

CYCL DEF: Select Cycle 263 THREAD MILLING AND

COUNTERSINKING

Nominal diameter of thread: Q335

Thread pitch: Q239

The algebraic sign determines the direction of the thread:

Right-hand thread: +

Left-hand thread:

Thread depth: Distance from top of workpiece to thread

termination: Q201

Countersinking depth: Distance from workpiece surface to bottom

of hole: Q356

Feed rate for pre-positioning: Q253

Type of milling: Q351

Climb: +1

Up-cut: 1

Set-up clearance: Q200

Lateral set-up clearance: Q357

Sinking depth at front: Q358

Countersinking offset at front: Q359

Workpiece surface coordinate: Q203

2nd set-up clearance: Q204

Feed rate for counterboring: Q254

Feed rate for milling: Q207

Q203

Q239

Q201

Q204

Q200

Q253

Q356

Q359

Q357

Q358

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