Stainless steel shaft

[Clive HartlandParticipant @clivehartland94829]

I have just bought some stainless steel 5mm shaft and its not round, put in the triple plain bearings and it catches as it is turned.

Measuring it shows a slight ovality but its hard to measure.

Does anyone know of where I can get precision ground 5mm st steel shaft?

I have looked at HPC but no luck there.

 

Clive

[Clive HartlandParticipant @clivehartland94829]

[jason udallParticipant @jasonudall57142]

maybe
smiths metals? Poole 01202893712
RS? 01536 201201
Rs may be better free del.
Smiths cheaper by foot but add carr…

[WeldsolParticipant @weldsol]

You could look at the CNC parts suppliers as they offer stainless for the linear bearing shafts. The only thing is it’s very hard but is machineable with carbide tipped tooling

 

Paul

[S.D.L.Participant @s-d-l]

Its a common problem with center less grinding and needs a mic with a vee anvill to detect as it can measure the same at any position with a std mic.

 

See here.

 

http://www.gagesite.com/documents/Metrology%20Toolbox/Geometry.PDF

 

And here

 

http://www.fivesgroup.com/fivescinetic/en/News/Articles/Documents/Centerless%20Grinding%20Article%2001_05_07_MMS.pdf

 

You might be able to detect in raw stock by rotating in a vee block with DTI mtd.

 

Steve Larner

[Clive HartlandParticipant @clivehartland94829]

I will look at the RS cat. tomorrow at work, thanks for your help.

 

Clive

[jason udallParticipant @jasonudall57142]

other smiths msybe local to you.

[MICHAEL WILLIAMSParticipant @michaelwilliams41215]

Hi Clive ,

 

Please note that while 5 mm ground bar is available from several stockists its is only actually manufactured in a very few places . I and others have had the experience recently of chasing similar requirements and ending up with more and more samples of the same dud material after each enquiry .

 

Personally if the length needed is not impossibly great I always prefer now to make my own acurate bar from next size up .

 

MW

[jason udallParticipant @jasonudall57142]

btw how out of round…guess enough to foul

We used to use “gauges” with tenth micron resolution with centerless grinding looked round on them but wouldn’t turn between mic anvils.

[jason udallParticipant @jasonudall57142]

.. [can not find way to delete duplicate post]

Edited By jason udall on 16/01/2012 22:33:24

[John HaineParticipant @johnhaine32865]

Try typing rswww.com into your browser – much easier than using their catalogue

[David ColwillParticipant @davidcolwill19261]

Is this condition described as obround?

Dave.

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