Gallery, Projects and General > How do I??

Any Mathmatitions On Line (lathe change wheels)

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doubleboost:

--- Quote from: John Stevenson on August 30, 2015, 11:33:00 AM ---John,
What size is the 63 teeth gear on the OD and bore details.
I have a box of old change wheels here from auctions and college clearouts, might just have one.

--- End quote ---
Thanks for the kind offer John I will have a measure up

doubleboost:

--- Quote from: philf on August 31, 2015, 07:05:21 AM ---John,

Is your dividing head the BS0 type with a 40:1 worm and wheel?

If you have a division plate with 29 and 33 holes you could use compound indexing.

You need an extra detent plunger to engage with the 33 hole hole circle. (I made mine with a piece of stiffish spring steel and rivetted a pin in the end. The division plate is not bolted - it is free to rotate and the extra detent (in the back of the plate) stops it rotating.

To get 63 divisions you index 4 turns and 19 holes on the 29 hole circle and then 14 holes on the 33 hole circle by moving the plate. This doesn't give an exact division - the maximum error is 0.027 degrees.

The downside is that the chances of getting something wrong are high unless you're very, very careful.

A better solution would be for me to drill you 63 holes in a plate on my CNC mill. If you want one tell me what OD and ID. It would have to be in 3mm MS because, other than 16mm boiler plate, that's all I have. 63 holes would be very tight on a BS0 plate so the holes would have to be a bit smaller - meaning a smaller pin.

Cheers.

Phil.

--- End quote ---

Thanks for the offer that would be the ideal solution a direct plate
I will go with the 64 tooth gear and compare the results to the 63
Then decide from there
John

trapper:
You can only try John if you havnt got the correct plate for your D/Head if it was me I would go slightly deeper on the depth

Pete.:
That'll be 24 hole plate, index every 15 holes John.

krv3000:
well I wood just mack a adapter to fit the 63 tooth onto the divider and set up a detent on the mill bed  :)

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