External Micrometers

Looking for external micrometers then we have the solution for you. Our extensive range has an improved categorised filter to help you find your ideal solution. External micrometers are also known as outside micrometers, commonly used for precise measurements such as the outer diameter of component parts or materials.

Also known as

  • Micrometer screw gauges
  • Outside micrometers

How does a micrometer work?

It’s important to learn how to use micrometers correctly, especially analogue micrometers. External micrometers are designed with an anvil, spindle, barrel scale, and a thimble scale. During operation clamp the object between the anvil and the spindle, turning the thimble moves the spindle closer to the object being measured, once the spindle touches combine the barrel scale and thimble scale for the measurement reading.

A digital micrometer is easier to use, the operating principles are the same as analogue micrometer except the LCD display reads the measure for you.

Measuring scales

The external micrometer has the measuring scale labelled or embossed on the device, you take the readings from the barrel scale which has two measurement points; above and below the line. Above is mm and below is 0.5 mm. The thimble also has marking measured to the nearest 0.01mm.

  • Example reading: Barrel scale 12 mm + Thimble scale 0.35 mm = 12.35 mm

Applications

External micrometers are used by engineers in workshops, metal fabrication, calibration testing, and quality control.


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Viewing 1 - 20 of 60 products
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Description Price Accuracy Resolution Imperial or Metric Micrometer Type Calibrated SPC Data Output Data Processing Battery Operated Set Contents Metric-Imperial Conversion Maximum Measurement Minimum Measurement
RS Stock No. 705-1229
BrandRS PRO
£76.97
Each
Units
±0.002 mm 0.001 mm Both External - - - Yes - Yes 25mm 0mm
RS Stock No. 704-8775
BrandRS PRO
£109.53
Each
Units
±0.002 mm 0.001 mm Both External UKAS - - Yes - Yes 25mm 0mm
RS Stock No. 725-1968
BrandRS PRO
£59.76
Each
Units
±0.001 in 0.0001 in Imperial External UKAS - - No Adjustment Tool, Case - 25mm 0mm
RS Stock No. 725-5709
BrandRS PRO
£25.66
Each
Units
±0.001 in 0.0001 in Imperial External - - - No Adjustment Tool, Case - 25mm 0mm
RS Stock No. 704-8778
BrandRS PRO
£397.69
1 Set
Set(s)
±0.004 mm 0.01 mm Metric External UKAS - - No Setting Rod - 150mm 0mm
RS Stock No. 705-1213
BrandRS PRO
£256.20
1 Set
Set(s)
±0.004 mm 0.01 mm Metric External - - - No Setting Rod - 150mm 0mm
RS Stock No. 725-2009
BrandRS PRO
£59.76
Each
Units
±0.004 mm 0.01 mm Metric External UKAS - - No Adjustment Tool, Case - 25mm 0mm
RS Stock No. 725-5724
BrandRS PRO
£25.66
Each
Units
±0.004 mm 0.01 mm Metric External - - - No Adjustment Tool, Case - 25mm 0mm
RS Stock No. 704-8771
BrandRS PRO
£167.77
Each
Units
±0.002 mm 0.001 mm Both External UKAS - - Yes Battery, Case, User Manual Yes 25mm 0mm
RS Stock No. 705-1216
BrandRS PRO
£137.69
Each
Units
±0.002 mm 0.001 mm Both External - - - Yes Battery, Case, User Manual Yes 25mm 0mm
RS Stock No. 704-8753
BrandRS PRO
£398.28
1 Set
Set(s)
±0.001 in 0.0001 in Imperial External UKAS - - No Setting Rod - 152mm 0mm
RS Stock No. 705-1266
BrandRS PRO
£256.81
1 Set
Set(s)
±0.001 in 0.0001 in Imperial External - - - No Setting Rod - 152mm 0mm
RS Stock No. 725-5702
BrandRS PRO
£35.36
Each
Units
±0.004 mm 0.01 mm Metric External - - - No Adjustment Tool, Case - 50mm 25mm
RS Stock No. 725-1946
BrandRS PRO
£65.25
Each
Units
±0.004 mm 0.01 mm Metric External UKAS - - No Adjustment Tool, Case - 50mm 25mm
RS Stock No. 705-1210
BrandRS PRO
£161.83
Each
Units
±0.002 mm 0.001 mm Both External - - - Yes Battery, Case, User Manual Yes 50mm 25mm
RS Stock No. 704-8787
BrandRS PRO
£191.11
Each
Units
±0.002 mm 0.001 mm Both External UKAS - - Yes Battery, Case, User Manual Yes 50mm 25mm
RS Stock No. 307-4694
BrandRS PRO
£117.88
Each
Units
±0.004 mm 0.01 mm Metric External UKAS - - No Adjustment Tool, Case - 25mm 0mm
RS Stock No. 248-9180
BrandRS PRO
£89.53
Each
Units
±0.004 mm 0.01 mm Metric External - - - No Adjustment Tool, Case - 25mm 0mm
RS Stock No. 725-2047
BrandRS PRO
£86.07
Each
Units
±0.004 mm 0.01 mm Metric External UKAS - - No - - 25mm 0mm
RS Stock No. 725-5733
BrandRS PRO
£51.71
Each
Units
±0.004 mm 0.01 mm Metric External - - - No - - 25mm 0mm