What is a micrometer useful for?





Page 1 of 6 1 2 3 4 5 6 LastLast
Results 1 to 20 of 104
  1. #1
    Join Date
    Jun 2014
    Location
    George
    Posts
    2,726
    Thanked: 998

    Default What is a micrometer useful for?

    Apart from the obvious which would appear to be that a micrometer is used to make ultra precise thickness measurements, in normal day-to-day life doing DIY or vehicle repairs when would you likely need to use a micrometer?

    I have a little Moore and Wright micrometer that I have been hanging on to but I'm sorting through all my tools and I haven't used the thing for the ten years I've had it. My Mitytoyo Vernier is all I've ever needed thus far and having limited space I find that tools that don't get used just get in way when you trying to find the ones you do.
    Last edited by Dirk; 2019/08/20 at 07:15 PM.

  2. #2
    Join Date
    Jun 2014
    Location
    George
    Posts
    2,726
    Thanked: 998

    Default Re: What is a micrometer useful for?

    This is what the one I have looks like

  3. #3
    Join Date
    Mar 2010
    Location
    Benoni
    Age
    39
    Posts
    2,298
    Thanked: 233

    Default Re: What is a micrometer useful for?

    Its very useful to someone that reloads his own ammunition
    Cruiser 76 V8
    Disco 4 XS

  4. The Following 3 Users Say Thank You to wildhunter For This Useful Post:


  5. #4
    Join Date
    Apr 2014
    Location
    Roodepoort
    Age
    63
    Posts
    1,042
    Thanked: 2623

    Default Re: What is a micrometer useful for?

    There are never too many tools. Other items are less important. I seem to have in my desk drawer two sizes or vernier, micrometer from 0 to 50 mm (with spacer), plumb bob, 15 m tape, 5 m tape, 3 m tape, Leica D3 laser, mini microscope, navigation tools, scale ruler.... (I do have tools room)

    You might use micrometer for some bearing related issues inside an engine. If you give that micrometer away you will need it the next day

    Last time I used the micrometer on a car was to measure front brake disc thicknesses. Vernier did not work because of the ridge on the edge. End result was - machine and will still be within manufacturer's limits.
    Jouko
    ----------
    2003 Grand Cherokee 4.7l
    2012 Smart
    Never drive a normal car

  6. #5
    Join Date
    Nov 2011
    Location
    Langebaanweg
    Age
    42
    Posts
    1,114
    Thanked: 733

    Default Re: What is a micrometer useful for?

    I have 6! Only used a few times when they were my FIL's.

    But it was worth it. When he wanted to sell, I begged him to give it to me.

    They will stay with me only because I know I can't buy new ones if needed.
    '07 Land Rover Defender 110 TDI 300 Kalahari (Meisiekind˛)

    84' Land Rover Defender 110 V8 4-speed Hardtop (Meisiekind) Sold after 12 years of fun and hard work




    The only thing needed for evil to triumph is for a good man to do nothing.

  7. #6
    Join Date
    May 2014
    Location
    Tshwanetoria
    Age
    66
    Posts
    1,494
    Thanked: 594

    Default Re: What is a micrometer useful for?

    For when it is VERY cold?



  8. The Following 6 Users Say Thank You to hatjohan For This Useful Post:


  9. #7
    Join Date
    Apr 2018
    Location
    Fraserburg
    Age
    59
    Posts
    478
    Thanked: 526

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by Skylark View Post
    Apart from the obvious which would appear to be that a micrometer is used to make ultra precise thickness measurements, in normal day-to-day life doing DIY or vehicle repairs when would you likely need to use a micrometer?

    I have a little Moore and Wright micrometer that I have been hanging on to but I'm sorting through all my tools and I haven't used the thing for the ten years I've had it. My Mitytoyo Vernier is all I've ever needed thus far and having limited space I find that tools that don't get used just get in way when you trying to find the ones you do.
    The average machine tinkerer will only require a vernier which measures in big divisions of millimetres. A micrometer measures in thousands of a millimeter and someone like a served time artisan that did an apprenticeship and knows what he is doing rebuilding an engine or replacing precision bearings will use one.

    The picture shows the basic fault every layman makes with a micrometer - the gap gas been screwed closed. Like a vice - even a big vice, the gap in the jaws should always be left open in the rest position.

    Let's see how many here know why? The reasons are similar but not measurement related on the vice.
    2001 Isuzu Frontier 4X4 DT280 LX 2.8 Turbo Diesel (Tourer)
    2011 JMC 4X4 Double Cab 2.8 Turbo Diesel (Work Bakkie)
    1973 Land Rover Series 2A 109" Ford V6 Kanniedood, Salisbury diff, galvanised chassis etc. (Hobby and Work vehicle)

  10. The Following 5 Users Say Thank You to Olyfboer For This Useful Post:


  11. #8
    Join Date
    Jan 2012
    Location
    King Williams Town
    Age
    51
    Posts
    7,176
    Thanked: 870

    Default Re: What is a micrometer useful for?

    Micrometers are used mainly in Fitting and turning trade, ie lathe work
    Isuzu STD 2.5d 2x4 rear diffy lock
    2x spotlight,2x fog lights
    215/80/R15c tyres
    1 x great humourous driver
    GPS,Bluetooth
    Eagle eye dash cam --stolen ..bought another one
    snorkel soon
    Craig
    I DON'T LIVE IN AFRICA,AFRICA LIVES IN ME- Kyle my son

  12. The Following User Says Thank You to hunter26 For This Useful Post:


  13. #9
    Join Date
    Oct 2010
    Location
    Pretoria
    Age
    60
    Posts
    1,371
    Thanked: 381

    Default Re: What is a micrometer useful for?

    I have an imperial one, decades old

  14. #10
    Join Date
    May 2011
    Location
    Klipriver
    Age
    58
    Posts
    1,976
    Thanked: 223

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by hunter26 View Post
    Micrometers are used mainly in Fitting and turning trade, ie lathe work
    A decent mechanic will also use one, and a turner more so than a fitter.
    Alan


    _________________
    Range Rover P38

    Defender on Steroid's (Sadly sold)
    Previous: Pajero 3.5 V6 (Gas Guzzler)
    Series 3 109 SW (Tortoise)
    Platkar Ford Fiesta 1.6tdi (Swambo's present)

  15. The Following 2 Users Say Thank You to All -in -one For This Useful Post:


  16. #11
    Join Date
    Apr 2014
    Location
    Roodepoort
    Age
    63
    Posts
    1,042
    Thanked: 2623

    Default Re: What is a micrometer useful for?

    Vernier gives 1/10 of a millimeter, micrometer 1/100 of a mm 1/1000 is something else.

    I would say you do not close micrometer due to minor differential heat expansion issues plus closing (especially wrongly) puts a force on internals. It is no good to put any form of a permanent force on a precision tool.

    There are very few who know all of the measuring methods on vernier and not too many who know how to use micrometer. To use measuring tape seems to be an issue also.
    Jouko
    ----------
    2003 Grand Cherokee 4.7l
    2012 Smart
    Never drive a normal car

  17. The Following 3 Users Say Thank You to Jouko For This Useful Post:


  18. #12
    Join Date
    Apr 2014
    Location
    Roodepoort
    Age
    63
    Posts
    1,042
    Thanked: 2623

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by faniedup View Post
    I have an imperial one, decades old
    Has been illegal to sell one in South Africa since 1961 or thereabout.
    Jouko
    ----------
    2003 Grand Cherokee 4.7l
    2012 Smart
    Never drive a normal car

  19. #13
    Join Date
    Apr 2014
    Location
    Roodepoort
    Age
    63
    Posts
    1,042
    Thanked: 2623

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by All -in -one View Post
    A decent mechanic will also use one, and a turner more so than a fitter.
    Week back Sunday morning early I was sent a drawing for a welded item with dimensions having two decimals. Signed by AIA, Pr.Eng. and a draughtsman. Fitted had to use micrometer for dimensions like 796.06 and 696.06 (actual values on the drawing)
    Jouko
    ----------
    2003 Grand Cherokee 4.7l
    2012 Smart
    Never drive a normal car

  20. The Following User Says Thank You to Jouko For This Useful Post:


  21. #14
    Join Date
    May 2009
    Location
    Hillcrest, Malaysia
    Age
    63
    Posts
    18,512
    Thanked: 5888

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by Jouko View Post
    Has been illegal to sell one in South Africa since 1961 or thereabout.
    I find that hard to believe. Imperial units are available just about anywhere and all the digital ones can do both Metric and Imperial.

    Also what would be the motivation. Plenty of precision instruments and equipment are American sourced and Imperial and the workshop manuals are in Imperial units.
    Cheers

    ZS5KAD
    3 V8's
    NA TwinTurbo SuperCharger
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  22. #15
    Join Date
    Apr 2018
    Location
    Fraserburg
    Age
    59
    Posts
    478
    Thanked: 526

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by hunter26 View Post
    Micrometers are used mainly in Fitting and turning trade, ie lathe work
    They are also used by armature winders to determine the size of copper wire windings in a motor they are stripping for rewinding. Many other uses too.
    2001 Isuzu Frontier 4X4 DT280 LX 2.8 Turbo Diesel (Tourer)
    2011 JMC 4X4 Double Cab 2.8 Turbo Diesel (Work Bakkie)
    1973 Land Rover Series 2A 109" Ford V6 Kanniedood, Salisbury diff, galvanised chassis etc. (Hobby and Work vehicle)

  23. #16
    Join Date
    May 2009
    Location
    Hillcrest, Malaysia
    Age
    63
    Posts
    18,512
    Thanked: 5888

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by Jouko View Post
    Week back Sunday morning early I was sent a drawing for a welded item with dimensions having two decimals. Signed by AIA, Pr.Eng. and a draughtsman. Fitted had to use micrometer for dimensions like 796.06 and 696.06 (actual values on the drawing)
    Strange dimensions are almost always Imperial to Metric direct conversions. Boxing gloves are a good example.
    Cheers

    ZS5KAD
    3 V8's
    NA TwinTurbo SuperCharger
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  24. #17
    Join Date
    May 2009
    Location
    Hillcrest, Malaysia
    Age
    63
    Posts
    18,512
    Thanked: 5888

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by Olyfboer View Post
    They are also used by armature winders to determine the size of copper wire windings in a motor they are stripping for rewinding. Many other uses too.
    And Guitar strings.
    Cheers

    ZS5KAD
    3 V8's
    NA TwinTurbo SuperCharger
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  25. #18
    Join Date
    Jan 2012
    Location
    durban
    Age
    56
    Posts
    1,090
    Thanked: 771

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by Jouko View Post
    Week back Sunday morning early I was sent a drawing for a welded item with dimensions having two decimals. Signed by AIA, Pr.Eng. and a draughtsman. Fitted had to use micrometer for dimensions like 796.06 and 696.06 (actual values on the drawing)
    Thats funny.can you imagine how many you need as they normally go up in increments of 25mm.

    Plumbers also use micrometers. At least if you are a good accurate plumber like me.
    Name:  micrometer.jpg
Views: 257
Size:  7.7 KB
    Last edited by plunger; 2019/08/20 at 07:02 PM.

  26. The Following 8 Users Say Thank You to plunger For This Useful Post:


  27. #19
    Join Date
    Apr 2018
    Location
    Fraserburg
    Age
    59
    Posts
    478
    Thanked: 526

    Default Re: What is a micrometer useful for?

    Quote Originally Posted by Jouko View Post
    Has been illegal to sell one in South Africa since 1961 or thereabout.
    Why? Steam trains were all imperial measurements and were used long after 1961. I used to love hanging around the huge Garret engines as a kid when they were in for service and watching the wheel pinions wear diameter being measured using big micrometers.
    2001 Isuzu Frontier 4X4 DT280 LX 2.8 Turbo Diesel (Tourer)
    2011 JMC 4X4 Double Cab 2.8 Turbo Diesel (Work Bakkie)
    1973 Land Rover Series 2A 109" Ford V6 Kanniedood, Salisbury diff, galvanised chassis etc. (Hobby and Work vehicle)

  28. #20
    Join Date
    Jan 2012
    Location
    durban
    Age
    56
    Posts
    1,090
    Thanked: 771

    Default Re: What is a micrometer useful for?

    I use a micrometer almost nearly every day. i can get away with using a vernier but for bearing and slide fits you need a micrometer. I have one imperial micrometer that I bought at an auction as it was in a job lot and i am embarrassed to say i have no idea or understanding on how to read it.

    I just cant understand who would ever use the imperial system. i frequent machining forums every day and if you want a heated debate (more than even 2s0) tell a pommie or yank there imperial system is rubbish.You wont here the end of it.

    I think jouko has the right answer to why a mic shouldnt be closed. Please tell.

Page 1 of 6 1 2 3 4 5 6 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •