Thread: looking for dividing tables

Try here -
Steve Bedair's 9 x 20 Lathe Page

Michael
(Check that he has the right ratio though)

Mate you don't need no tables only 2 formulas for any and all dividing heads

I will keep it simple most dividing heads are 40/1 reduction so ill use that, if your head is a 60, 80 or a completely stupid reduction like 55 then substitute that into the top of the formula below

Turns = reduction eg 40
................divisions

For angles:

Turns degrees = 8degrees
..........................angle

ok ill do some examples, divisions of 8 and an angle of 35 degrees on 40 and 60 reduction

1#
Turns = 40
............8
= 5 find a common factor and simplify
...1
8 holes = 5 full turns on a 40/1 reduction head

2#
Turns = 60
............8
=7 turns 1 ok now find the largest dividable
............2 set of hole spacings... lets say 36

8 holes = 7 full turns and 18 holes on the 36 hole plate

Have I lost you yet? no? stay tuned

Ok so ill show you how to work out an angle now its dead easy mate

What ever reduction your diving head uses, Divide that into 360degr
example.

360 = 8degr
40
360 = 6degr
60

Ok so now you know how many degrees your dividing head moves with one full turn on the dividing plate you can take your formula below...

Turns = ....... angle
..........degrees per turn

Edit: I now realize my formula in the post above is wrong BUT this IS correct

ok ill do an example with 35degr

1#
Turns = 35 = 4 turns and 3 ... Again look for the biggest common
............8 ....................8 ....hole set on your plates..16,24 & 32

35degrees = 4 full turns and 12 holes on a 32 hole plate on a 40/1 reduction head

#2
turns = 35 = 5 turns and 5
...........6.. ................. 6

35degrees = 5 full turns and 20 holes on a 24 hole plate on a 60/1 reduction head

Tip ALWAYS look for the largest hole set available with your dividing head... It is more accurate and turning the handle will be easier

I hope these formulas were clear if not get a black book

ok thanks guys it dont mean much to me at the moment , i will need to study it when i do get a lathe or mill , but i can print out this info and give it to my mate .
if my old man was still around i could just bash his ear for all this stuff but he is gone .
i also had a very handy mate live next door to me when i was in brissy he is a wizzard on workshop machinery . one of you blokes could even know my old mate from next door .
he worked for rheem cam p........ck

johno

Heres one.

Kev.

lol I somehow spent all evening writing that where does the time go I hope it helped