Machining an ER 11 collet nose

Machining an ER 11 collet nose

This topic has 3 replies, 3 voices, and was last updated 27 February 2015 at 08:39 by Jon Gibbs.

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27 February 2015 at 01:47 #181423
Mark Bus
Participant
@markbus97330
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
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27 February 2015 at 01:47 #17632
Mark Bus
Participant
@markbus97330
27 February 2015 at 06:05 #181432
Thor 🇳🇴
Participant
@thor
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
27 February 2015 at 08:39 #181438
Jon Gibbs
Participant
@jongibbs59756
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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