CNC program example code for the G71 Bolt Hole Arc command.
G71 bolt hole arc command makes it easy to drill/tap/bore evenly spaced holes in an arc.
Canned cycles G73, G74, G76, G77, or G81-G89 can be used with G71 bolt hole arc G-code.
G71 Bolt Hole Arc Format
G71 I J K L
I – Radius of the bolt hole arc
J – Starting angle of first hole ( 0 to 360° CCW from horizontal at the 3 o’clock position).
K – Angular spacing between holes (+ or -)
L – Number of evenly spaced holes around bolt hole arc.
Read full article G71 Bolt Hole Arc – CNC Mill Programming
G71 Bolt Hole Arc Programming Example
G71 Bolt Hole Arc Example Program
O005 N10 T2 M06 N20 G90 G54 G00 X2. Y-1.5 N30 S1451 M03 N40 G43 H02 Z1. M08 N50 G81 G99 Z-0.45 R0.1 F8. L0 N60 G71 I1.0 J15. K30. L7 N70 G80 G00 Z1. M09 N80 G53 G49 Z0. M05 N90 M30
