Are Stevenson’s ER Blocks Useful

[Martin ConnellyParticipant @martinconnelly55370]

Andy, if you want something that goes beyond the square and hex blocks consider the Stevenson's 5C indexing head with ER32 adaptor and nut as sold by Ketan.

Martin C

[VicParticipant @vic]

Yes, I’ve found my spindexer very handy at times.

[Chris TriceParticipant @christrice43267]

MSC/J&L have had similar blocks in their catalogue for a while. How original is the idea? I think one of Tubal Cain's videos also shows similar blocks for 5C collets. I even made some for myself ten years go to take morse taper collets for the purpose of resharpening milling cutters.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Chris Trice on 04/12/2018 18:54:44:

MSC/J&L have had similar blocks in their catalogue for a while. How original is the idea? I think one of Tubal Cain's videos also shows similar blocks for 5C collets.

.

I suppose the 'originality' came with adapting a very old idea to an ER version.

MichaelG.

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Edited By Michael Gilligan on 04/12/2018 19:05:50

[JasonBModerator @jasonb]

5C blocks have been around for along time and is likely what inspired JS to come up with the ER ones. As Far as I can remember ARC had them before MSC, though a quick glance at the MSC catalogue only shows 5C

JS also came up with the idea of the custom nut and adaptor to fit the JS indexer, though the same indexer without that feature has been around for quite a while.

Edited By JasonB on 04/12/2018 19:06:07

[Andy PughParticipant @andypugh44463]

Posted by Martin Connelly on 04/12/2018 18:33:26:

 

Andy, if you want something that goes beyond the square and hex blocks consider the Stevenson's 5C indexing head with ER32 adaptor and nut as sold by Ketan.

 

If I want to accurately index I have this:

https://bodgesoc.blogspot.com/2017/05/harmonic.html

And a D1-4 5C collet chuck. (Or I could hold the ER32 block in a 3-jaw or 4-jaw chuck)

Edited By Andy Pugh on 04/12/2018 19:22:03

[steamdaveParticipant @steamdave]

Posted by thaiguzzi on 28/10/2017 11:03:55:

Yabbut, when will someone make and sell square and hex ER collets? That's another advantage 5C has.

Harold Hall described collets for square material that would fit inside a standard ER (or probably any other) collet.
I had several Burnerd multisize square collets and I never ever used them!

Dave
The Emerald Isle

[Chris TriceParticipant @christrice43267]

I've always found a close fitting split sleeve over square or hexagonal stock works well.

[Howard LewisParticipant @howardlewis46836]

ER Collet blocks are very useful. Had just finished making (bodging) mine (ER25 and ER32) when Arc started selling J S's version.them. They are far better product than mine.

Like others, just wish that ER collets for square or hexagon were available.

Howard

[John HaineParticipant @johnhaine32865]

Actually you can hold square material in an er collet by catching the corners in the slits. Not for heavy loads since you can’t insert the material right through the collet but useful for grinding tools for example. I did this yesterday to make the tangential bit for my Unimat toolholder.

[Andy PughParticipant @andypugh44463]

Posted by John Haine on 06/12/2018 19:09:13:
Actually you can hold square material in an er collet by catching the corners in the slits. Not for heavy loads since you can't insert the material right through the collet but useful for grinding tools for example.

I wonder whether the collets would still work if you were to wire spark-erode a square hole into one?

[David Davies 8Participant @daviddavies8]

In a fit of enthusiasm I made square and hex blocks for er 20, 32 and 40. I use both the 32 blocks regularly. They have easily repaid the time taken to make them.

Cheers

Dave

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