ER32 Extension

You can always stick a square collet block into a 4 jaw chuck and dial in the required concentricity. Arc Eurotrade sell all sizes with and without nuts and all have a through hole. I would make a setting bar with an accurate centre drilled in one end to ensure the positioning of the block is along the spindle axis.

Martin C

The nice thing about the EE design is that you don't have whirling chueck jaws close to your fingers when hand turning - his design even has a nicely rounded collet nut.

Spectacularly made? Surely it must come from a bloke who cannot find his glasses?

Tim

I stumbled across these tonight and they are quite close in concept, if not size, to what the OP wanted two years ago.

A bit of diligent searching might find an ER32 one:

https://www.ebay.co.uk/itm/394745604793

Edit: sure anough, a bloke called Ali will send them to you by Express delivery.

The key search term is "transfer head adapter transition joint" £25.68 as of this date onto your UK doorstep for ER32 to ER32.

Edited By DC31k on 20/08/2023 21:57:30

There was a company on Ali, that was selling a bearing nut for ER32 and smaller. Nothing to catch your hand on if you cover the area between the nut and the body where the extra thread is. In China and else where , they are making these bearing spanners that have either a lever or switch for the different directions, or else you need to turn the spanner over. They make the matching Nuts and spanners for the ER16 and the SK models, up to ER32 or the equivalent . An ER32 nut is 70mm diameter I think it showed, I have some and they work very well. Will get some more in the future. A lot of brands are making the one way bearing spanner now. BIG make them for some of their range, in particular the mini collet holder, for holding the drills on a 1.5mm shanked drill bit and the smaller 0.8mm shank series drills or cutters etc

A search for Bearing wrench , will show up the results.

Neil

harsh comments in here for a typo and quick post I made...

Came back to make a correction.. my collect chuck runs 6 thou excentric runout. (got my imperial and metric mixed up again)
Its still a lot for a collet chuck without a collet fitted.

Brendan

I think it's because of the spectacular word, I don't ever recall that word being used to describe the quality of a tool so something that is different stands out.

Don't loose sleep over it.

Emgee

I've just done this for a job where I had to face, drill and tap 90 aluminium rods each end and can confirm it worked a treat.

Graham