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Were ER about when your old silky was made?
no wonder she drills and reams wonky holes in her flywheels
P.S. I just brought a set of those Chinese chip fat covered ER32's for drill holding
May they rust in peace.Mike
Quote from: Jo on March 20, 2018, 09:15:36 AMP.S. I just brought a set of those Chinese chip fat covered ER32's for drill holding Hope they were not on this slow boat from China http://www.dailymail.co.uk/news/article-5521901/Two-huge-ships-collide-knocking-containers-sea.html
You buy oversize collets, most just do 2-20mm but you can get them from 1mm to 25mm though they cost a little morehttps://www.ebay.co.uk/itm/Gloster-ER32-collet-all-sizes-2-0-25-0mm-and-1-NEW-DIN6499B-Quality-collets/370688002673?hash=item564eba0a71:m:m4t3vWF5JQmaiN5nqZZjYSg
I thought the original question was about collets for the lathe Jo
It was you that said they were good for tool holding
ER collets will only hold a part true if the part fits for the whole length of collet length. When I hold short parts in an ER collet, I use a short piece that is the same diameter I am holding, that supports the back of the collet so it can't collapse.5C and R8 collets will hold a short piece quite well , as long as it is within a very small amount of the collet nominal dimension.There is a really big difference in quality and concentricity with all collets, and unless you buy the precision series of collets, the rest are all a gamble.