Hey guys...I'm bagged...been working on moving my Ohio mill into my too small machine room. Getting it set up for when my helper comes back so she can start learning how to cut gears.

Had to tear the table off and move a million things about 4 times each ...moving engine hoist around and thru etc etc etc . I ended up with the mill sitting right beside the monster old dividing head I got with my VN. It's a Cincy head if i recall.

Anyway I got monkeying around with it...it's a pretty cool old head.

I need to cut a 10.82" gear with 204 teeth(6tpi).

so..I've decided to do it with this old head.

However..I'm lost with the calculations.

I can follow the formulas easy enough for small gears but this big tooth count has my tired noodle all buggered up.

The dividing head is a 40 to 1. The only plate on it has from 24 to 43 holes.

How in the heck do I figure the right row on the plates...and how many hole spaces etc?

I need one of them fancy Decimal to fraction calculators. I found an excellent program for that...I don't have the right calculator. What am I missing?

I can figure out 33 or 28 or whatever...small gears...no problem...not this high tooth count..

Thanks!

Russ

Had to tear the table off and move a million things about 4 times each ...moving engine hoist around and thru etc etc etc . I ended up with the mill sitting right beside the monster old dividing head I got with my VN. It's a Cincy head if i recall.

Anyway I got monkeying around with it...it's a pretty cool old head.

I need to cut a 10.82" gear with 204 teeth(6tpi).

so..I've decided to do it with this old head.

However..I'm lost with the calculations.

I can follow the formulas easy enough for small gears but this big tooth count has my tired noodle all buggered up.

The dividing head is a 40 to 1. The only plate on it has from 24 to 43 holes.

How in the heck do I figure the right row on the plates...and how many hole spaces etc?

I need one of them fancy Decimal to fraction calculators. I found an excellent program for that...I don't have the right calculator. What am I missing?

I can figure out 33 or 28 or whatever...small gears...no problem...not this high tooth count..

Thanks!

Russ

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