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Machining an ER 11 collet nose

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Mark Bus	27/02/2015 01:47:23
50 forum posts 21 photos	Hi, I want to make an auxilliary milling spindle and use ER 11 collets for the tool holding. Is there a way besides the" marking blue to check the fit of the collet in the collet nose taper" method to check the nose taper? I've been practicing cutting the taper and I don't quite trust myself to be able to get it right doing it that way. Thanks, Mark
Thor 🇳🇴	27/02/2015 06:05:59
1766 forum posts 46 photos	Hi Mark, When made an ER 32 chuck for my small lathe I turned a piece from my scrap box to fit into one of my collets and put a Dial Indicator in the top slide tool post and adjusted the top slide to be parallel to the taper of the collet. I then mounted the collet chuck on the lathe spindle and turned most of the taper. Before the finishing cuts I used the marking blue method to check the taper and adjust. Harold Hall describes another method here, he used it for turning Morse tapers but the principle is the same. Thor
Jon Gibbs	27/02/2015 08:39:36
750 forum posts	Hi Mark, HH also describes his set-up for the internal ER collet taper too here... LINK All ER collets use the same 8 degree taper angle. Jon

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