
B-63874EN/05 CYCLE MACHINING TYPES 2.TURNING
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PT thread: G1463 (tapered thread for tubes, ZX plane)
A PT thread (tapered thread for tubes) is cut. Only one tapered thread
(tapered by 1.7899 degrees) is machined. Be sure to set a tool angle of 55
degrees. The taper figure of an external thread (male thread) is such that
the end face of a blank represents a minor diameter portion. The taper
figure of an internal thread (female thread) is such that the end face of a
blank represents a major diameter portion.
Male screw)
Female screw)
POS./SIZE
Data item Meaning
W THREAD TYPE [MALE] : To be selected when the external thread is
specified as threading type
[FEMALE] : To be selected when the internal thread is
specified as threading type
D THREAD DIAMETER Thread diameter (positive value)
Z START POINT (Z) Z coordinate of a thread start point
L THREAD NUMBER Number of thread crests per inch
M LENGTH Thread length (radius value, positive value)
H THREAD DEPTH Thread depth (radius value, positive value)
Remark) A thread depth is automatically calculated by
pressing [CALC] after inputting a thread number.
NOTE
The thread depth of a PT thread is calculated from
parameter No. 27154 (external) or parameter No.
27155 (internal) and a thread number.