Sandvik Coromant Threading - Manual (Page 94)

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6
6H
5. Technical reference
CoroMill® Plura
CoroMill Plura has an individual radius programming value (RPRG)
marked on the shank of the tool.
The RPRG value indicates each cutter’s exact pitch diameter and
the radius required for optimum thread quality.
The RPRG value is normally entered into the tool memory offset.
Using the RPRG will prevent the fi rst thread from being too large, as
long as the operational conditions are good.
Pitch
Internal
thread
Thread
type
Individual tool ra-
dius programming
value
Example CNC code (machining centre)
CNC programme - FANUC
(M6) T
Tool call-in
G90 G17
Selection of working plane
S3369 M3
G00 G43H...X0.000 YO.000 Z2.000
2 mm “above” workpiece surface on centerline of thread
Climb milling
Cutting speed v
c
127 m/min
5000 inch/min
Feed per tooth 0.059 mm
.0023 inch
Time/thread
“Rprg” - 0.053 mm