Poor Man Dividing

jocat54

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H-M Supporter Gold Member
Joined
Dec 25, 2011
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591
Using a cheap rotary index and some 1/4" x 5 1/2" acrylic discs. Drilled the holes using the DRO bolt circle function. Made 5 discs using numbers not possible with the original rotary index, up to 48. May make more if needed--they are pretty easy to make

dividing.jpgdividing1.jpg
 
Actually was wondering if something like that was possible and how to implement it. Thank you!:aok:
 
What is the "dro bolt circle hole function"?
 
It is a function of some?(most)? DRO's that will give the coordinates of the xy axis to drill holes for a given diameter.
You enter your center of a cirlce x-0/y-0 and the diameter of the circle you want, the number of holes, the start and end angles.

Edit: Also known as Pitch circle diameter--probably the correct name.
 
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I am a newbie reading a lot.

I've seen the threads on using saw blades and counting teeth.

Anyone ever used a cross drilled brake rotor? Not sure the patterns used for drilling.

Cross-Drilled-Rotor.jpg
 
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