Stainless steel shaft

This topic has 11 replies, 7 voices, and was last updated 17 January 2012 at 09:39 by David Colwill.

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16 January 2012 at 21:05 #82257
Clive Hartland
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@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
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16 January 2012 at 21:05 #5872
Clive Hartland
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@clivehartland94829
16 January 2012 at 21:49 #82259
jason udall
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@jasonudall57142
maybe
smiths metals? Poole 01202893712
RS? 01536 201201
Rs may be better free del.
Smiths cheaper by foot but add carr…
16 January 2012 at 22:05 #82260
Weldsol
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@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
16 January 2012 at 22:07 #82261
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
16 January 2012 at 22:09 #82263
Clive Hartland
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@clivehartland94829
I will look at the RS cat. tomorrow at work, thanks for your help.

Clive
16 January 2012 at 22:20 #82265
jason udall
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@jasonudall57142
other smiths msybe local to you.
16 January 2012 at 22:26 #82267
MICHAEL WILLIAMS
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@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
16 January 2012 at 22:27 #82268
jason udall
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@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.
16 January 2012 at 22:27 #82269
jason udall
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@jasonudall57142
.. [can not find way to delete duplicate post]

Edited By jason udall on 16/01/2012 22:33:24
17 January 2012 at 08:25 #82280
John Haine
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@johnhaine32865
Try typing rswww.com into your browser – much easier than using their catalogue
17 January 2012 at 09:39 #82282
David Colwill
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@davidcolwill19261
Is this condition described as obround?

Dave.
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