ER32 which end mills

[Neil WyattModerator @neilwyatt]

Or a ball bearing nut may help you close up by hand on smaller stock. It also lets you get a better grip when finish tightening with a spanner. They are a good example of a modest upgrade whose benefit far exceeds the cost!

Neil

[IanTParticipant @iant]

Good point Jim – like NDIY, I prefer not to really tighten over the halfway point of the given ER 'range' – which means that some Imperial cutters can be handled OK (in Metric collets) but others less so, particularly smaller items …

So 3/8ths & 5/8ths (at 4.76mm/7.94mm) should be OK but 1/8th & 1/4" less so (at 3.17mm/6.35mm) in my view. So whilst I don't have a full set of imperial ER collets, I do have those that would be close to the full closing range of the metric one.. I always use low friction nuts on anything over 'halfway' but I am still not fond of doing so…..

Regards,

IanT

[not done it yetParticipant @notdoneityet]

Ian,

I don’t mind at all – I use the full 1mm range. It is just tightening the collet to get a grip on the shank sufficiently, to then tighten it fully with both hands on spanners. No problem with x.9mm but x.1mm can be a pain if I need to make umpteen repetitive changes of tool. As simple as that.

As for JB saying that a 0.9mm smaller shank (than the nominal max size of an ER collet) will hold in place – well I don’t believe him, unless he has it horizontal, not vertical.

Do note that my initial reply was to Tim’s post (that was why I ‘quoted’ his post). I would not dream of using a shank different than the nominal value of a Clarkson collet!

[JasonBModerator @jasonb]

Posted by not done it yet on 18/03/2018 17:55:28:

As for JB saying that a 0.9mm smaller shank (than the nominal max size of an ER collet) will hold in place – well I don’t believe him, unless he has it horizontal, not vertical.

I said cutters, I did not say 0.9mm smaller than the largest range size.Cutters come in standard shank sizes eg 1/4", 3/8", 1/2", 6mm, 8mm, 10mm, 12mm, 16mm, etc and I have collets in all those sizes as the largest size of their range.

What cutters do you have with odd size shanks?

Mine stay in the collets be they metric

Or Imperial

Edited By JasonB on 18/03/2018 18:51:37

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