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Micrometer 50-75mm Digital (ME30075)

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SKU: ME30075 Categories: ,

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Product Description

Application:
A micrometer generally provides greater precision than a vernier caliper, but can measure a smaller range of lengths.
Before using a micrometer:
  1. Make sure the workpiece being measured is clean and has no burrs on the edges.
  2. The temperature of the workpiece is required to be around 20°C to have consistent measuring results.
  3. Precision measuring tools should never be put near a magnetic area to avoid the micrometer being magnetized.

How to use and read a micrometer:

Use:
An object to be measured will be placed between the spindle and the anvil. The ratchet knob is then turned until the spindle lightly touches the object. Clean the spindle and anvil faces before and after reading an object.

Spindle:
The spindle is connected to a calibrated screw with a pitch of 0.5mm (metric). One full revolution of the thimble advances the spindle face towards or away from the anvil face precisely by 0.5mm.

Sleeve:
The reading line on the sleeve is graduated above the central long line in millimetres (1.0mm) with every fifth millimetre being numbered. The reading line below the central long line is graduated in half-millimetres (0.5mm)

Thimble:
The beveled edge of the thimble is divided into 50 equal parts with each line representing 0.01mm and every fifth line being numbered from 0-50. Thus the reading is given by the number of millimetre and half-millimetre divisions visible on the sleeve plus the number of hundredths of a millimetre indicated by the thimble graduation which coincides with the central long line on the sleeve.

Handling and care of micrometers:

  • The micrometer should be handled with great care. Wipe the faces of the spindle and the anvil clean from any dust or dirt before and after reading a measurement.
  • The accuracy should be periodically checked by measuring a known dimension.
  • Oil may be lightly applied to prevent rust.
  • A micrometer is a measuring instrument and should be safely stowed away to prevent any damage from occurring.

Range:

50-75mm

Readout:

Digital and analog

Accuracy:

0.001mm – digital

0.01mm – analog

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