Dividing Head or Rotary table?

[Buckeye]

I am looking at Dividing Heads and Rotary tables, I was told by a friend to get a dividing head, but I remember Skiprat uses a Rotary table pretty much the same way as you would use a Dividing head so does anyone have one or the other or maybe both and can give me a heads up what to consider.

Peter

 

[pittswood]

Hi Peter,
A rotary table only turns one degree or muilti angles at a time. A dividing head has the option to change hole discs and position of the peg, to suit any size diameter or shape in a perfect division.

Of the two, a diving head is more aimed at the engineer.
Hope this helps.
Kelvin

 

[Buckeye]

Hi Peter,
A rotary table only turns one degree or muilti angles at a time. A dividing head has the option to change hole discs and position of the peg, to suit any size diameter or shape in a perfect division.

Of the two, a diving head is more aimed at the engineer.
Hope this helps.
Kelvin

Are you sure, Skiprat uses a rotary table with plates to change hole discs.

Peter

Phenolic gear cutting - YouTube

 

[Penpal]

Both expensive choices, horses for courses. Purpose, needs and where and what you fit them to so many firsts. A quick E Mail to Skiprat telling him your need would give a great starting place Peter.

Peter.

 

[pittswood]

The first pic is a true dividing head, using a fitted fixed three jaw. The second is a dividing rotary table, with no fixed three jaw.
I have used these type of machines over the past 30 years, making spur gears and other gearing.
Here is a link to a site explaining its principles.


Dividing head – introduction | john f's workshop






Kelvin

 

[Buckeye]

The first pic is a true dividing head, using a fitted fixed three jaw. The second is a dividing rotary table, with no fixed three jaw.
I have used these type of machines over the past 30 years, making spur gears and other gearing.
Here is a link to a site explaining its principles.


Dividing head – introduction | john f's workshop


Kelvin

Thank you for taking the time, I have seen so many sites trying to explain the difference between them and I still don't get it, I am waiting for the lightbulb moment. I have ordered a book on dividing so am hoping that will help to make it clear rather than just add to my confusion.

Peter

 

[pittswood]

Hi Peter,
Sorry if I have confused you. I have added another link for you it may be better.

Dividing. Using a Dividing Head and other Methods 01

Regards,
Kelvin

 

[wm460]

So you got your mill?

You can buy dividing plates to suit rotary table.

R016 | DP-1 Dividing Plate | For Sale Sydney Brisbane Melbourne Perth | Buy Workshop Equipment & Machinery online at machineryhouse.com.au

Cheaper that a dividing head. If only these were available in ER40 collets.

Stevenson's 5C Indexing Head with ER32 Nut and Adaptor - Arc Euro Trade

 

[wm460]

That is a great site Kelvin thanks for posting it.

 

[pittswood]

Hi guys,
No problemo,
Kelvin

 

[edlea]

:book::book::book:

 

[Buckeye]

Hi Peter,
Sorry if I have confused you. I have added another link for you it may be better.

Dividing. Using a Dividing Head and other Methods 01

Regards,
Kelvin

Thanks again, it is Harold Hall's book on Dividing that I have ordered and I think he explains really well for those of us with non engineering backgrounds.

Peter

 

[Buckeye]

So you got your mill?

No, just window shopping and trying to work out what I need/want or not.

You can buy dividing plates to suit rotary table.

R016 | DP-1 Dividing Plate | For Sale Sydney Brisbane Melbourne Perth | Buy Workshop Equipment & Machinery online at machineryhouse.com.au

Cheaper that a dividing head. If only these were available in ER40 collets.

Stevenson's 5C Indexing Head with ER32 Nut and Adaptor - Arc Euro Trade

I have looked at that and it may be one I will get if I can work out what I want to do.

Peter

 

[pittswood]

Hi Peter,
The book "Harold Hall's book on Dividing" I think was published some 15-20 years ago. He was then a writer for "Model Engineering" mag. About the same age as me! as I dabbled in model steam engines etc. Many moons ago.
Kelvin

 

[Buckeye]

Hi Peter,
The book "Harold Hall's book on Dividing" I think was published some 15-20 years ago. He was then a writer for "Model Engineering" mag. About the same age as me! as I dabbled in model steam engines etc. Many moons ago.
Kelvin

I have ordered a further two of his books MILLING A COMPLETE COURSE and The Milling Machine one of which goes into more depth about rotary tables, dividing heads and indexers.

He has a knack of explaining things in a way I can understand at last.

Peter

 

[pittswood]

You can not go wrong with those type books. At least one can refer back on a book, in my days of an M.E.C.P. student at college, we only had one book between 20 of us!
But back at the company we used Cincinnati millers with Cincinnati dividing heads. These used in the production of hydraulic presses up to 1000 tons p.i.
Glad I am retired.
Kelvin

 

[Buckeye]

You can not go wrong with those type books. At least one can refer back on a book, in my days of an M.E.C.P. student at college, we only had one book between 20 of us!
But back at the company we used Cincinnati millers with Cincinnati dividing heads. These used in the production of hydraulic presses up to 1000 tons p.i.
Glad I am retired.
Kelvin

I am looking forward to reading them and learn a little more, even if I don't end up getting a mill or a dividing head, I will have learned a little more than I know at the moment.

If I had the room to put a Cincinnati mill in my garage, the one I am thinking of getting would be a doddle.

Peter

 

[Penpal]

You can not go wrong with those type books. At least one can refer back on a book, in my days of an M.E.C.P. student at college, we only had one book between 20 of us!
But back at the company we used Cincinnati millers with Cincinnati dividing heads. These used in the production of hydraulic presses up to 1000 tons p.i.
Glad I am retired.
Kelvin

Kelvin what presses at this pressure mate. At the Royal Mint recently there were so many presses.

Peter.

 

[pittswood]

Hi Peter,
Those presses were for the Soviet Union. This was in around 1970-75, most were tailored up to press tank wheels, armoured plates etc; They stood up nearly twice the height of a doubled decked bus, with the main centre ram nearly 5 foot in diameter. These were self contained machines, all having their own hydraulic pump units (each press had three pumps in a row, to produce that pressure). One press took three massive load loaders to ship to Russia. That's all I can remember, I was only 18 then.
Kelvin

 

[Penpal]

Hi Peter,
Those presses were for the Soviet Union. This was in around 1970-75, most were tailored up to press tank wheels, armoured plates etc; They stood up nearly twice the height of a doubled decked bus, with the main centre ram nearly 5 foot in diameter. These were self contained machines, all having their own hydraulic pump units (each press had three pumps in a row, to produce that pressure). One press took three massive load loaders to ship to Russia. That's all I can remember, I was only 18 then.
Kelvin

that work requires great care mate, experiences like that are rarish and exciting.Makes pen turning look a doddle. Thanks for sharing.

Peter.