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Thread: Micrometer recommendations?

  1. #1
    Join Date
    Nov 2005
    Location
    Wisconsin
    Posts
    275

    Default Micrometer recommendations?

    I would like to buy a set of micrometers up to 3 or 4". The 1" I currently have is an old-school vernier with a friction thimble. How are the digital (not electronic) ones, are they very repeatable? Also, how much better are the ratcheting thimbles? Anybody had good luck with "quality imports"? Tell me what works for you guys...

  2. #2
    Join Date
    Nov 1999
    Location
    SE OZ
    Posts
    3,963

    Default Good micrometers

    Hi sidegrinder

    Good post.

    I saw some very good micrometers (0 - 3") at Littlemachineshop.com (USA) for US$29.25 - and they are calibrated/indexed to "tenths".
    http://www.littlemachineshop.com/pro...1248&category=

    And right next to them is the "Starret" equivalent at US$440.00
    http://www.littlemachineshop.com/pro...duct_view.php?
    ProductID=1836&category=

    Now if anyone cares to explain to me why Starret is worth nearly 15 times as much I am willing to listen - but I will tell you that a "...because its Starret and its made in the USA etc. etc. .............." excuse just will not "wash".

    Little machineshop has its reputation to maintain and so I don't think they would be interested in selling "rubbish".

    I've bought a lot of stuff from them and CDCO.com lately (both in the USA) and all of it has been very good to excellent.

    I have been using micrometers etc. for a long time. I have tried the digital ones. I do have an open mind. The digital "mic's" are a bit awkward to hold but they do the job.

    Don't be put off by all the "noise" about "battery-failures" etc. as regards any digital equipment. Batteries are dirt cheap - so keep a store of them and replace as necessary.

  3. #3
    Join Date
    Feb 2007
    Location
    Andalusia,Alabama
    Posts
    188

    Default

    I have Starrett, B&S, And some Slocomb I also have a import set that goes up to 6 inch. I;ve check them with all the others and they read the same.I think the set was about 40 bucks.I also have some import 1 inch digital that work fine..

  4. #4
    Join Date
    Oct 2004
    Location
    WA Western Australia
    Posts
    2,273

    Default

    FWIW, I bought the concentric indicator and digi calipers from LMS and am well satisfied with both as well as prompt service to Oz.
    Usual disclaimer, just a satisfied customer.
    Just got my head together
    now my body's falling apart

  5. #5
    Join Date
    Feb 2005
    Posts
    1,583

    Default

    I ordered a set of import 0-6 w/standards from www.shars.com yesterday..$69 # 303-2653N Their website is not complete, but they have an awsome free catalog

  6. #6
    Join Date
    Aug 2007
    Location
    Texas
    Posts
    175

    Talking

    I have two digital calipers and they are Starrett brand. Both of these have failed over the time I have had them. The 'internals' failed and Starrett repaired both of them, but at a cost of $107 for each repair. Starrett did not actually repair them, but rather replaced the head on each. I guess this is more cost effective.
    I have no use for battery powered instruments after this experience. Just give me a set of Starrett 436 Series mics and I am happy........pg

  7. #7
    Join Date
    Jan 2004
    Location
    Arlington TEXAS
    Posts
    380

    Default Mics

    I got a set of 1-6" manual mics from Shars a few months ago. The quality and accuracy are stunning for the price. I really don't see how they can be made so cost effectively, even with low wage employees.

    Lenord

  8. #8
    Join Date
    Jul 2005
    Location
    Chester, NH
    Posts
    5,410

    Default

    I've got a set of craftsman brand from 0-4" vernier. They are actually made by SPI but craftsman gets to stamp their name on them. I got the set for 100 bucks and all of the larger sizes besides 0-1" have ratchet and friction thimbles. The 0-1" has a friction thimble only. I personally like the ratchet mechanism becauses i work out in a garage that is likely to leave my fingers pretty cold. In the winter time i have a hard time "feeling" how much squeeze or torque i'm putting on the mircrometer. With the ratchet one, it doesnt matter how much you squeeze the thimble, it starts ratcheting at the same point every time. I find the ratchet style much more repeatable than friction - seems like friction you have to calibrate them to your own personal feel.

    I haven't used them much but they seem pretty decent - they came with standards and they have nice insulators on the frame and the standards to prevent body heat from throwing stuff out of whack. Some of the nicer micrometers come with tiny little insulators that are hard to keep a hole of, but these have the insulation pad over the entire side of the frame so its easy to hold.

    Not sure about the mechanical digital ones - i always think they look goofy and not very accurate, but i'm sure thats not true. Thats just a purely asthetic statement!

  9. #9
    Join Date
    Apr 2001
    Location
    Maine
    Posts
    7,009

    Default

    I mostly use a Starrett 0-1" micrometer that I bought used, quite a few years ago. It's still a good micrometer.

    At one point when I was working in high tech and actually had money, I bought a new Starrett 1-2".

    Over the years I've picked up used Starrett 2-3" and 3-4". Since I use them infrequently, I decided "good used" was good enough, and it has been.

    All except the 3-4" have the 0.0001" vernier and carbide faces.

    I've got both friction thimble and ratchet, and of the two I think I favor the ratchet type slightly. Mostly I don't bother with either one and go buy "feel."

    Being somewhat of a Luddite, I've avoided any of those newfangled electronic gizmos.

    A machine shop friend of mine, a professional machinist, likes Lufkin micrometers. They're no longer made, of course, but "good used" are available. Others are partial to Brown & Sharpe.
    ----------
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  10. #10
    Join Date
    Jul 2005
    Location
    Chester, NH
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    Default

    Being somewhat of a Luddite, I've avoided any of those newfangled electronic gizmos.
    You know, that pretty much sums it up for me too. I really dont like electronic stuff if i can avoid it - which is weird since i kinda grew up with it.

    I guess i should point out that those craftsman ones had carbide faces and etc.

    Maybe its because i'm a rookie, but i found that the friction ones are dependent upon "feel" just to a lesser degree than if you just turn in it normally. I've noticed differences when measuring standards of +/-.00015 (the last digit being estimated, obviously) with friction because i can squeeze the thimble a little bit and get a smaller reading. For that reason, i like the ratchet ones. I dunno - maybe i'm doing something wrong... on the other hand .0001 isn't too bad

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