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( Author: taiden  )
( Date: 6/23/2012 )
( Keep up the good work! )


( G2 inside radius )
( G3 outside radius )


G17				( z axis on xy plane )
G90.1 				( relative IJK coordinates - I0 J0 centered arc )
F60 				( feed rate 60 inches/min )

T1 				( change tool - 1/4" carbide end mill )
M06				( machine code change tool )
G40				( NO tool compensation )

M03 				( start spindle )
G0 X0 Y0 Z0.5			( rapid safe zero which is center of piece )



( 1st inner radius )


G1 X-0.75 Y0 Z0 		( cut to helix start - bore radius 0.75")
G2 I0 J0 Z-1.50 P15		( rough inside radius - depth 1.50" - DOC 0.100" )
G2 I0 J0 X0.75 Y0 		( finish bore base )
G2 I0 J0 X-0.75 Y0

G0 Z0.5				( rapid to safe height )
G0 X0 Y0 Z0.5			( rapid to safe zero )



( 2nd inner radius )

G1 X-0.875 Y0 Z0 		( cut to helix start )
G2 I0 J0 Z-1.1 P11 		( rough middle radius - depth 1.1" - DOC 0.1" )
G2 I0 J0 X0.875 Y0 		( finish bore base )
G2 I0 J0 X-0.875 Y0

G0 Z0.5				( rapid to safe height )
G0 X0 Y0 Z0.5			( rapid to safe zero )



( 3rd inner radius )

G1 X-0.925 Y0 Z0 		( cut to helix start )
G2 I0 J0 Z-0.375 P4 		( rough 3rd radius - depth 0.375" - DOC 0.09375" )
G2 I0 J0 X0.925 Y0 		(finish bore base )
G2 I0 J0 X-0.925 Y0


G0 Z0.5				( rapid to safe height )
G0 X0 Y0 Z0.5			( rapid to safe zero )





( 1st outer radius )


G1 X1.075 Y0 Z0			( cut to helix start )
G3 I0 J0 Z-0.75 P8		( rough 1st outer radius - depth 0.75" - DOC 0.09375" )
G3 I0 J0 X-1.075 Y0		( finish bore base )
G3 I0 J0 X1.075 Y0


G0 Z0.5				( rapid to safe height )
G0 X0 Y0 Z0.5			( rapid to safe zero )


( clean up )

G0 Z0.5				( rapid to safe height )
G0 X0 Y0 Z0.5			( rapid to safe zero )
M5 				( stop spindle )