spin indexers

[jomacParticipant @jomac]

Iv’e seen spin indexers on E/bay and in ME and MEW, so are they better than a geared type.

I built on indexer which is a cross between L. Sparey and G Thomas types, but without the indexing plates, I only use the available gears for the two lathes. It works, just doing the maths is the problem.

Now I think a spin indexer with a 36 hole disc uses the vernier holes in the following way, You start with the pin at hole 0 then turn the disc to the next hole which is number 1, and so on, to hole number 9, and continue, by starting back at hole 0 again, turning your blank continuously as you go does this the give you 360 divisions. What happens if you have less holes in the indexing disc, ie, 25.30.40 etc.

Iv’e never seen one in action, only dividing heads, So can some one please explain if I am on the right track.

Also could I suggest to the editors is it possible to do an article, with drawings on how to make one of these, BUT without castings, just out of scrap or what you can buy from a steel merchant , here in OZ shipping costs are horrendous. so a casting is out for me.

 

[jomacParticipant @jomac]

[David Clark 13Participant @davidclark13]

Hi There

Spin inexers are useful but only work to 1 degree divisions.

What is usefule is that you can make your own plates and they don’t neeed to be equispaced.

You can make them to suit the job.

I have done this on a couple of occasions.

 

Also you can drill holes in the plate to bolt the component to as well.

 

Spin indexers take 5C collets and they can be difficult to tighten up tightly.

 

regards david

 

[John Stevenson 1Participant @johnstevenson1]

Just to point out that the Spin Indexer as sold by Arceurotrade, is to a unique design that can hold ER32 and 5C collets on the same tool with no modifications.

 

Given that the 5C series works in fixed sizes and the ER system works over a 1mm or 40 thou range per collet with no gaps this gives you two bites of the cherry depending what collet system you run.

 

Another plus is the ER series is the only work holding and tool holding system readily available so it has a spin off for the people who share collets between a mill, lathe and attachments.

 

John S.

[duncan webster 1Participant @duncanwebster1]

Someone must have done this, so it could save some thinking time. Has anyone converted a spin indexer to CNC or division master using a stepper motor? If so can you post photos/drawings

[John Stevenson 1Participant @johnstevenson1]

This any good Duncan ?

Not got time for a lot at the moment, gotta shoot out and deliver a machine.

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