Sandvik Coromant Threading - Manual (Page 70)

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3. Products - thread milling
CoroMill® Plura – Multi-point threading
CoroMill Plura solid carbide thread mills produce different threads
of the same pitch with one tool. Threads are milled in one pass and
this multi-point tool gives a true full-profi le thread form, with 60°
metric, UNC/UNF and NPT/NPTF options available
CoroMill Plura is designed for smaller thread sizes in diameters
down to 3.2 mm (.126 inch) and in two optimized grade choices,
with or without through coolant. It is the ideal tool for mass produc-
tion.
Easy programming
The cutting diameter of each tool has to be considered carefully
when the operation is programmed, and programming with radius
correction allows easy adjustment of thread tolerances. CoroMill
Plura has an individual radius programming (RPRG) value marked
on the shank, to indicate the exact pitch diameter and radius cor-
rection required for optimum thread quality.
The RPRG value is normally entered into the tool radius offset, and
using this will prevent the fi rst thread from being too large, as long
as the operational conditions are good.
For more information see chapter 5, Technical reference (page 93).
Tool radius programming value.