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Murks
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Murks WRT Addict

Murks

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Hi can someone help please a bought this micro meter to read my jewel but can't seem to understand what the measurement on the reading are saying  it said pivot size was -3.235mm the outside diminsion it on the reading -2.353mm how will a convert those with the reading cousins are selling it in?

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grsnovi Distinguished Member

grsnovi

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Murks, the mic shown is only able to read outside diameters. It can not read an inside diameter (like the ID of a pivot diameter in a jewel). If you have measured the outside diameter of one of the pivot shafts that would make sense. If you have measured the outside diameter of a jewel that would make sense. The OD of a jewel in a small movement might be approx. 1mm while in a large movement it might be 2mm. A pivot diameter would likely be somewhere around 0.4mm.

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Murks WRT Addict

Murks

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What type mic should i use if a was to measure inside diameter of the  pivot ? you said the mic am using can only measure the outside diameters so how will a conved the reading I got on my mic -2.353mm the reason im asking if cant understand the reading on this mic that i bought then no point keep it to 1mm of does it make sense 

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Klassiker Distinguished Member

Klassiker

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Hello Murks, try as follows. Go slowly. Complete one step, then go on to the next.

1. Close the micrometer by turning the ratchet knob, that's the small knob at the end. You should feel and hear the ratchet clicking when the jaws are closed. The knob will still turn. Always use this knob when taking measurements.

2. Press the button on the left with the label on/off - set. The display will come on and you will see a number. Write it down, please. If the number is 0.000mm, then everything is OK and you can start measuring. If the number is not 0.000mm, do step 3.

3. Press the on/off - reset button and hold it down until 0.000mm appears on the display. Now take your finger off the button. You are ready to start measuring.

Please let me know if this helps.

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HectorLooi Distinguished Member

HectorLooi

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Just found this amazing item on AliExpress. Check it out! SG$36.36  15%OFF | 0-25MM Digital Electronic Micrometer 0.001MM Micron Outside Micrometers Gauge Meter Inch/mm Thickness Measuring Tools With Box
https://a.aliexpress.com/_mrg6yA4

I found the model of the micrometer you have on AliExpress. If you scroll down the page, you will see the instructions. 

 

Here's a video of how to use it.

 

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