Another use for the "Stevensons Collet Blocks"

I have a touch-probe that fits my vertical head, but not the horizontal.

I have a coaxial indicator that fits both, but that's no good for picking up edges.

I had a brainwave at the weekend, and used the square "Stevensons Collet Blocks" from arc-eurotrade.

This turns out to be 40mm square with a nice ground and tapered hole. SO once the dial was running true I knew I was 20mm above the table and 20mm from the edge of the part being machined.

As a bonus, the fact that the bore is tapered means that the dial shows oval if you are out of square too.

Hi Andy

Thanks for sharing.

Thor

Smart. Like it.

The 'oval' test is a particularly nice bonus.

... Good thinking

MichaelG.

Inspired thinking Andy, especially the rotational alignment indication.

I think John would have issued his expression 'job's a good un' in recognition.

Thank you for sharing it

Regards Brian

It is not often I learn something new. Thanks. BTW, this should work with a normal dial test indivator as well as the Blake.

Like it.

Well done Andy.

Brilliant idea.

Will use this in future, since I have the sq. and hex blocks.

+1 Andy, great idea!

I've just got my ER40 Sq.+Hex set!

I've bought things in the past that I thought was going to be handy..... and it really just didn't fulfil that expectation.

The more I do and see people doing with the these blocks, the more I like it!

I've added a pair of 20-40-80 + 10-20-40 Stevenson’s blocks to my Xmas list as I've always fancied a set and they'll prove invaluable for a couple of checks I want to make on my lathe next year.

Edited By Russ B on 07/11/2017 05:25:14

It must work on 5C blocks too - Just need a coaxial indicator. another toy to buy.