Dividing Head

Could someone help with this please, just picked it up and what you see is all of it no other plates or tail stock or instructions on how to ues it please help.

Alan.

http://i1239.photobucket.com/albums/ff506/alanpearce/Dividinghead003.jpg

http://i1239.photobucket.com/albums/ff506/alanpearce/Dividinghead002.jpg

http://i1239.photobucket.com/albums/ff506/alanpearce/Dividinghead001.jpg

[IMG]http://i1239.photobucket.com/albums/ff506/alanpearce/Dividinghead001.jpg[/IMG]

Go onto Grizzly Machine Tools site and down load the manuals

**LINK**

**LINK**

**LINK**

I fixed the links for you.

looks nice.

Roy

Thanks wheeltapper.

Does any one know what chuck will fit straight on to it.

Alan.

Download the Vertex Pdf here (it is under the 'brochures and manuals' tab) **LINK**

Grizzly **LINK**

and here **LINK**

Steve

Have found out what chuck will fit it, the plates that are missing, could new ones be made using the plate that's on it or is it just as easy to by a new set, you will have gathered by now i know nothing about these types of tools it all a learning curve.

Al.

Alan

Just a suggestion - Workshop Practice No 37 - "Dividing" by Harold Hall. should explain just about everything you want to know.

Keith

Hi Al,

I don't think you can use the existing plate to make a new one with different number of holes. If you have acccess to a CAD program you can make drawings of the number of holes you need for a new plate, print the drawing and glue it to a blank plate. Then you just drill the holes.

Regards

Thor

Edited By Thor on 16/02/2013 17:58:22

You will find that the numbers on dividing plates are either prime numbers or simple multiples of prime numbers. Therefore it is not possible to make one from another as that is the the thing that makes primes special.

However on this forum and many back issues of ME there are details of lash-ups for making do normally on a lathe for people without a dividing head. You can use these methods on your dividing head too to help you make a new plate. If you so this to make a temporary plate first in say plastic you can use it to next make a plate out of metal which will be even better accuracy.

I see you already have an 18 hole circle. With a little common sense you can split that and have 2x18x40 (from the worm in the head) ie 1/4 of a degree. That should be accurate enough for you to make a lot of temporary plates as it is.

I'm not sure I follow that. Surely every integer greater than 1, that is not itself prime, is a multiple of prime numbers, so a dividing head can't create any divisions?

Regards,

Andrew

The point I was trying to make was that the circles are prime numbers. ( or simple multiples like 3x7 =21) So if you want a new circle that is a new prime it is by definition not a multiple of one of the ones you've already got or it wouldn't be a prime. I am only talking about dividing to make a new plate not subsequent use for eg gears as the OP asked if he could make the missing plates from the existing one.
Mostly there isn't any point in making plates that are just multiples of what you've already got. The exception perhaps is multiples of 9 because it gets you fractions of a degree.

Does that make sense or am I trying to shoot at right angles?

withdrawn -I'm just getting my head in a muddle...

Neil.

Edited By Stub Mandrel on 17/02/2013 09:56:38

Hi Al,

Where in the country/world are you.

If you are in the Hampshire area, I would be happy to loan you a set of dividing plates so that you could index off them to drill your own

Suitable 'slices' of 100mm bar can be easily obtained from most ME suppliers.

PM me if you need further assistance

cheers

Graeme

Bazyle: Yes it does make sense, thanks. I agree that you can't create a prime number of divisions, unless the plate being used contains that prime as a factor.

I was also going to reply to the comment by Stub, but it seems to have gone walkies. I'll say it anyway though; I don't think that differential indexing using a gear train helps, unless that gear train contains a gear with a number of teeth that has the prime to be generated as a factor.

Regards,

Andrew

Thank's for the help guys, i don't have CAD also would not know what to do with it anyway,

CoalBurner I live near Market Rasen North Lincolnshire if I was closer I would gladly take you up on your kind offer, will have to think of a way round it should be fun.

Kind Regards Alan.

Andrew -

I think you are right - I was chasing my own tail...

Neil

Hello Alan,

Plates are available individually from our usual suppliers as well as a tailstock to suit a BSO head which is the model you have. You might also pick up a handbook that way if you haven't used the pdf link you were sent. The tailstock will be the same as one used for a 6 inch rotary table set on it's side. The centre height is a nominal 4 inches.

Alternatively look for a tailstock on ebay, they are very non precision things really in that you set the centreheight with cross bolts just to put the support centre on axis through the head. After that it needs no further setting.

Index plates also appear on ebay from time to time, useful to have as they may extend your set. They are easy enough to modify [with care] to fit your head too with a little lathework. You can accomodate plates up to 5 inch diameter and still get the dividing head to clear the table without having to use raising blocks.

That diameter will enable drilling for a ring of holes up to #69 and those can be reached with the indexing pin on your head by extending the slot to increase the arm radius.

The standard plate set you need are 3 in number to give

15,16,17,18,19,20 holes

21,23,27,29,31.33 holes

37,39,41,43,47,49 holes

The set will give you all divisions up to 50 and many beyond that are multiples of the numbers you have.

The spindle bore is actually a Brown and Sharp taper, but I have found 2MT fits well enough. The nose on yours will be threaded for Myford chucks.

Enjoy your new toy

Brian

Thank's very much Brian will have have alook for some.