omega0684
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| posted on 5/11/10 at 07:30 PM |
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Advice Needed: Micrometers
Evening All,
i am on the look out for a nice set of Micrometers, haven't the foggiest in what to look for when buying a set. So step up locosters and advise
away, what should i be looking for when i buy a set and how much should i expect to pay?
i have seen Outside Micrometer Set 0-150mm RatchetStop Type on eBay (end time 16-Dec-10 21:15:02 GMT) on the bay,
anygood?
thanks again
Alex
[Edited on 5/11/10 by omega0684]
I love Pinto's, even if i did get mine from P&O!
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big_wasa
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| posted on 5/11/10 at 07:34 PM |
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Mitutoyo is a good quality brand of micrometer.
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matt_gsxr
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| posted on 5/11/10 at 07:35 PM |
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I guess it depends on what precision you need. Those certainly look pretty fancy.
What are you measuring?
I needed to measure some valve shims and a digital vernier from Halfords (Professional range) was accurate to the 0.02mm that I needed. Those are
about £20.
Matt
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marcjagman
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| posted on 5/11/10 at 07:38 PM |
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As they come in a nice box with the calibration pieces I would say they look pretty good value.
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thunderace
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| posted on 5/11/10 at 07:40 PM |
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Item number: 220689874591
Item number: 220689876133
do the same job for under £10
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sebastiaan
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| posted on 5/11/10 at 07:46 PM |
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10 for 56 quid? I'd rather not go there. As said, get some from Mitutoyo and buy only what you need not a full set because it looks posh.
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r1_pete
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| posted on 5/11/10 at 09:06 PM |
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I've had 3 moore and wright mic's for nearly 30 years 0-25mm, 25-50mm and 50-75mm, still very accurate and no sign of wear.
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perksy
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| posted on 5/11/10 at 09:30 PM |
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Have a set of Moore & Wright one meself
But Mitutoyo are a good name
Like most things, you get what you pay for
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Mark Allanson
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| posted on 5/11/10 at 09:34 PM |
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At that price they are probably made of chocolate!
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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clairetoo
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| posted on 5/11/10 at 09:41 PM |
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quote:
Originally posted by Mark Allanson
At that price they are probably made of chocolate!
mmmmmmmmmmmmmmm................................chocolate 
Its cuz I is blond , innit
Claire xx
Will weld for food......
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britishtrident
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| posted on 5/11/10 at 10:07 PM |
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Good quality digital calipers are probably much more useful, Jobs like checking the thickness of tappet shims are within the capability of
digital calipers the only car job that really needs a micrometer is checking crankshafts for ovalisation.
[Edited on 5/11/10 by britishtrident]
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britishtrident
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| posted on 5/11/10 at 10:09 PM |
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quote:
Originally posted by clairetoo
quote:
Originally posted by Mark Allanson
At that price they are probably made of chocolate!
mmmmmmmmmmmmmmm................................chocolate
Claire time to unmask you we know are really Homer Simpson. mmmmmmmmmmm doughnuts :-)
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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britishtrident
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| posted on 5/11/10 at 10:10 PM |
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quote:
Originally posted by r1_pete
I've had 3 moore and wright mic's for nearly 30 years 0-25mm, 25-50mm and 50-75mm, still very accurate and no sign of wear.
That new fangled metric stuff mine are probably WW2 surplus.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Minicooper
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| posted on 5/11/10 at 10:10 PM |
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The cheap digital ones from ebay, machine mart and the like are crap, maybe I just been unlucky but I don't think so
Cheers
David
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andy350z
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| posted on 5/11/10 at 11:17 PM |
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What sizes do need? My father in law has retired and shut down his engineering business, we are sell lots of tools on ebay for him. I'll see if
he has what you want.
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big_wasa
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| posted on 6/11/10 at 09:42 AM |
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quote:
Originally posted by britishtrident
Good quality digital calipers are probably much more useful, Jobs like checking the thickness of tappet shims are within the capability of
digital calipers the only car job that really needs a micrometer is checking crankshafts for ovalisation.
[Edited on 5/11/10 by britishtrident]
I would agree, I use my digi calipers for every thing. They are mitutoyo aswell. Ive only used the mic's a couple of times rebuilding engine.
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Strontium Dog
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| posted on 6/11/10 at 09:57 AM |
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I have Mitutoyo vernier callipers and micrometers. I recently bought a couple of cheap sets of verniers from Lydl. They actually compare reasonably
well to the Mitutoyos and if one of the lads drops them they were only a tenner unlike the Mitutoyos that were over a £100.
To achieve real accuracy you need to measure at 20deg. etc. A controlled environment is required.
http://cpm.uncc.edu/metrology-laboratory/7-metrology-lab-rules.html
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paulf
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| posted on 6/11/10 at 10:01 AM |
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As said they may be ok for what you require but I would really look for well know makes and even buy secondhand as long as in good condition.Moore and
wright or Mitutoyo are good makes to look for and I would avoid any of the ones with a built in digital readout.I served my time in a tool room and
although we had a few large micrometers most larger measuring was done with verniers etc and I only own Micrometers up to 3 inches and use a digital
vernier for general measuring.
For engine work you would only need a 0-25 and a 25-50 for cranks and maybe an internal set up to 4 inches for cylinder bores.
Paul
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