Siemens SINUMERIK 840D Operating Manual page 278

Programming technological functions (cycles)
8.1 Drilling
Parameter Description
User input
Pitch - (only 
machining without
Pitch results from the input
encoder)
Active feedrate

Pitch results from the feedrate
(only for G code)
Table Thread table selection:
Without

ISO metric

Whitworth BSW

Whitworth BSP

UNC

Selection Selection of table value: e.g.
M3; M10; etc. (ISO metric)

W3/4"; etc. (Whitworth BSW)

G3/4"; etc. (Whitworth BSP)

1" - 8 UNC; etc. (UNC)

P Pitch ...
in MODULUS: MODULUS = Pitch/π
- (selection 
option only for
in turns per inch: Used with pipe threads, for example.

table selection
When entered per inch, enter the integer number in front of the decimal point in the
"without")
first parameter field and the figures after the decimal point as a fraction in the
second and third field.
in mm/rev

in inch/rev

The pitch is determined by the tool used.
αS Starting angle offset - (for rigid tapping only)
S Spindle speed - (for rigid tapping only)
Machining (rigid The following machining operations can be selected:
tapping)
1 cut

The thread is drilled in one cut without stopping
Chipbreaking

The drill is retracted by the retraction amount V2 for chipbreaking.
Stock removal

The drill is retracted from the workpiece for stock removal.
D Maximum depth infeed - (only when used without compensating chuck, stock removal
or chipbreaking)
Retraction Retraction distance - (only without compensating chuck, chipbreaking)
Manual

Retraction distance after each machining step (V2)
Automatic

Without retraction distance after each machining step
278
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
Unit
MODULE
Turns/"
mm/rev
in/rev
Degrees
rev/min
mm
Milling