PROGRAMMING EXAMPLES
25196-8000
June 1999
SINGLE-POINT T HREAD M ILLING
Using the following data, we will write a program for single-point thread milling procedures:
DATA:
· 2.500 Ø hole
· Diameter of cutter (Subtract .750): 1.75
· Radial value (Divide by 2) : .875
· Thread pitch: .0833 (12 TPI)
· Part thickness: 1.00
PROGRAM EXAMPLE DESCRIPTION
%
O1000
(X0,Y0 is at the center of the hole)
(Z0 is at the top of the part)
T1 M06 (Tool #1 is a .750 diameter single-point thread tool)
G00 G90 G54 X0 Y0 S2500 M03
G43 H01 Z.1 M08
G01 Z-1.083 F35.
G41 X.275 DI (Radial value)
G3 X.875 I.3 F15.
G91 G3 I-.875 Z.0833 L14 (Multiply .0833 pitch x 14 passes = 1.1662 = total in Z-
axis)
G90 G3 X.275 I-.300
G00 G90 Z1.0 M09
G1 G40 X0 Y0
G28 G91 Y0 Z0
M30
%
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