Gallery, Projects and General > How do I??

Any Mathmatitions On Line (lathe change wheels)

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John Stevenson:

--- Quote from: Stuart on August 31, 2015, 07:28:50 AM ---Phil

Could not John use his DRO on his mill to do a PDC with 63 holes or any factor of the same say 21

Stuart

--- End quote ---

21 won't work.
For one thing 21 is a standard hole sequence on dividing plate but the formulae is

40 / 63 which will not break down any lower.

We needs answers off John but he's having a lie in.

chipenter:
Iff you mount the 63 gear to the indexing side then every 40 teeth drill a hole in the new plate will give you 63 .

lordedmond:
Thanks John
Had a brain fade , goes to show when you have a divisionmaster you forget the basics and just punch in the numbers , just like a calculator
Eg. Type all on one line into a calculator. 1 plus 1 divided by 2 you will get 1.5 not 1 as you expected

Reason they use BMDAS put brackets around the 1plus1 and you get 1 as you should

Moral do not trust them


Stuart

Pete.:

--- Quote from: chipenter on August 31, 2015, 10:18:21 AM ---Iff you mount the 63 gear to the indexing side then every 40 teeth drill a hole in the new plate will give you 63 .

--- End quote ---

But if you mounted a 63 tooth to the indexing side then every 40 teeth cut a tooth in a blank you'd have a gear.

doubleboost:
Thanks for all the comments
It would seem the 64 is no worse or better than a 63
As I am new to gear cutting I will have a go at cutting a 64
John

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