Drill And Thread Milling (Cycle78) - Siemens SINUMERIK 840D sl Operating Manual

Programming technological functions (cycles)
10.1 Drilling
Parameter Description
Machining (not The following machining operations can be selected:
for "with compen‐
● One cut
sating chuck")
● Chip breaking
● Swarf removal
D 1st drilling depth (abs) or 1st drilling depth referred to Z0 (inc)
SR Spindle speed for retraction - (only for "without compensating chuck").
Hidden parameters
The following parameters are hidden. They are pre-assigned fixed values or values that can
be adjusted using setting data.
Parameter Description
PL Machining plane
SC Safety clearance
Table Thread table selection
αS Starting angle offset
Retraction Without retraction distance after each machining step - (for
chip breaking only)
DT Dwell time at final drilling depth
SDE Direction of rotation after end of cycle
10.1.9

Drill and thread milling (CYCLE78)

Function
You can use a drill and thread milling cutter to manufacture an internal thread with a specific
depth and pitch in one operation. This means that you can use the same tool for drilling and
thread milling, a change of tool is superfluous.
The thread can be machined as a right- or left-hand thread.
352
The thread is drilled in one cut without interruption.
The drill is retracted by the retraction amount V2 for chip breaking.
The drill is retracted from the workpiece for swarf removal.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Value Can be set in SD
Defined in MD
52005
1 mm
Without
0°
Automatic
0.6 s
Operating Manual, 05/2017, A5E40868956
mm
rpm
x
x
Milling