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

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Programming technology functions (cycles)
10.1 Drilling
Parameter
Description
Machining
(not
The following machining operations can be selected:
for "with compen‐
● 1 cut
sating chuck")
● Chipbreaking
● Swarf removal
D
Maximum depth infeed - (only for tapping without compensating chuck, swarf removal
or chipbreaking)
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.
324
The thread is drilled in one cut without interruption.
The drill is retracted by the retraction amount V2 for chipbreaking.
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
Automatic
0.6 s
Operating Manual, 05/2017, A5E40868721
mm
rev/min
x
x
Turning

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