Originally Posted by
joecnc2006
If you do not have a program which can insert them for you, I would draw a duplicate of the part outline on another layer in Cadd off set it 1/2 the bit dia. and manually delete the line segments to exclude the area there you want tabs i.e, ------ ------ the space being the tab and machine the line directly for your final pass, If you have say 0.75" stock, machine everything as you would normally but on the final pass on the part cutout off (machine to a depth of 0.625") leaving the final 0.125" for your tab machining.
Hope that kinda explain how i would go about it.
Joe