Fixing Runout In An ER40 Collet Chuck

[@MarkATrombley]

I am glad you were able to fix the chuck without having to remake it.

[@alanshomeworkshop]

Thanks Mark.

[@MattysWorkshop]

Gday Alan, definitely a nice result, little bit of scotchbrit will shine the arbor up like new, great job, cheers

[@alanshomeworkshop]

Thanks Matty - what grade/colour Scotchbrite do you use ?

[@MattysWorkshop]

@@alanshomeworkshop Gday Alan, I use the maroon and grey coloured scotchbrit

[@HM-Projects]

​@@alanshomeworkshop lookup 7448 extra fine silicon carbide

[@alanshomeworkshop]

Thanks for the tip. I bought some grey, red and black today from Sydney Tools. It's currently on a special with most grades 30-40% off their normal price eg grey $2.03/sheet. I'll look for an opportunity to try it in my next video. Cheers.

[@Steviegtr52]

Great recovery Alan. Always nice to see. Regards. Steve.

[@alanshomeworkshop]

Thanks Stevie. I liked your oil pot from a car part - they are usually made from good quality material and are a great resource. I've made several things that way. Cheers.

[@bostedtap8399]

Nice setup and reclaim. Thanks for sharing.

[@alanshomeworkshop]

Thank you.

[@stevecarlisle3323]

The NT tool holder itself, are mostly very accurate, it's when you install low grade collets into the ER taper is when problems arise. There are at least 3 different grades of collets, and if that's not good enough, you can buy adjustable ER collet NUTS.

[@alanshomeworkshop]

Learnt something here - didn't know there were 3 grades of collets and had never heard of adjustable collet nuts. Thanks for sharing Steve.

[@stevecarlisle3323]

In addition,, there are manufacturers that make very accurate nt/er tool holders, even from China. Check the specs.

[@RustyInventions-wz6ir]

Very 😅 good work. Nice fix

[@HM-Projects]

Wow, nice end result 🎉

[@alanshomeworkshop]

Thank you.

[@f.hababorbitz]

You must have a very good set of ER40 collets, that's where I'm very surprised, at the low runout.

[@alanshomeworkshop]

Well I probably caught a lucky break as I didn't try rotating the collet to see what difference that would make. The collet came from a set I bought in March 2020 from M&G Productions. Concentricity of the collets was claimed to be within 0.008mm - they still list the same set here: mag-pro.com.au/index/index/productsdetails/id/513.html Cheers.

[@badjuju6563]

Nice work Alan

[@alanshomeworkshop]

Thanks again for your help and patience. I suspect the original problem related to the hole that I drilled through the body of the NT40 socket. That went off-centre, and because the boring bar had such a long stick might not have fully corrected the eccentric hole. I'll test this theory by remounting the NT40 socket and running a dial gauge in as far as I can reach. Cheers.

[@DK-vx1zc]

excellent! Thanks for sharing. Very interesting

[@alanshomeworkshop]

Thank you.

[@paulrayner4514]

good save. 👍

[@alanshomeworkshop]

Thanks Paul.

[@erickendall2506]

Nice video Alan. So what method did you use to set the taper angle?

[@alanshomeworkshop]

Thanks for the feedback Eric. I set the taper angle using a 5" Sine bar that is designed for use on the top slide and a gauge block stack. Cheers.