Micrometers

A micrometer (sometimes called micrometer screw gauge) is a precision measuring instrument, used to obtain very fine measurements and available in metric and imperial versions. They use a calibrated screw or thread (found internally on the spindle) for precise measurement of components in mechanical engineering and machining as well as most mechanical trades. They usually come in the form of callipers e.g. opposing ends joined by a frame. Learn how to calibrate and use micrometers correctly in our comprehensive micrometers guide.

What are Micrometers are composed of?

Here is a list of different components that make up a typical multimeter:

  • Frame - The C-shaped body that holds the anvil and barrel in constant relation to each other,
  • Anvil - The shiny part that the spindle moves toward, and that the sample rests against,
  • Sleeve/barrel/stock - The stationary round component with the linear scale on it, sometimes with vernier markings,
  • Locknut / lock-ring / thimble lock - The knurled component (or lever) that tightens to hold the spindle stationary,
  • Spindle - The shiny cylindrical component that the thimble causes to move toward the anvil,
  • Thimble - The component that turns by using a person’s thumb. Graduated markings,
  • Ratchet stop - Device on the end of the handle that limits applied pressure by slipping at a calibrated torque,
  • Screw.

How do they work?

The precision is determined by the thread pitch of the spindle. The spindle is a very accurately machined screw and the object to be measured is placed between the spindle and the anvil. The spindle is moved by turning the ratchet knob or thimble until the object to be measured is lightly touched by both the spindle and the anvil.

Types of Micrometers

  • Outside micrometer: most common type used to measure external dimensions such as the outside diameter of an object.
  • Inside micrometer; used to measure inside dimensions like the inside diameter of a hole or tube. There are two types: calliper-type and tubular and rod.
  • Depth micrometer: these are used to measure the depths of holes, slots and steps. They come with a variety of interchangeable rods of different lengths so that they can be used to measure a range of depths.

Advantages

  • Provide very accurate measurements and are considered one of the most accurate types of measuring device
  • Ratchet speeder helps to provide reliable measurements
  • Integrated scales, the sleeve scale and thimble scale are built into the tool, another measuring instrument such as a ruler or tape measure is not required
  • Durability and long-lasting and unlikely to need replacing or repairing

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Omschrijving Prijs 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-stocknr. 572-561
FabrikantnummerDW934
FabrikantStarrett
€ 283,40
Each
Aantal stuks
±0.01 mm - Metric Internal - - - No Adjustment Tool, Measuring Rod, Micrometer Head - 300mm 50mm
RS-stocknr. 572-555
FabrikantnummerDW933
FabrikantStarrett
€ 296,34
Each
Aantal stuks
±0.0004 in - Both Internal - - - No Adjustment Tool, Measuring Rod, Micrometer Head - 304mm 50mm
RS-stocknr. 603-205
FabrikantnummerDY160
FabrikantStarrett
€ 189,50
Each
Aantal stuks
±0.01 mm - Metric - - - - - - - 150mm -
RS-stocknr. 157-1165
FabrikantnummerDY092
FabrikantStarrett
€ 59,48
Each
Aantal stuks
±0.0001 in - Imperial External - - - No - - 25mm 0mm
RS-stocknr. 431-533
FabrikantnummerDW934
FabrikantStarrett
€ 323,90
Each
Aantal stuks
±0.01 mm - Metric Internal UKAS - - No Adjustment Tool, Measuring Rod, Micrometer Head - 300mm 50mm
RS-stocknr. 431-527
FabrikantnummerDW933
FabrikantStarrett
€ 336,84
Each
Aantal stuks
±0.0004 in - Both Internal UKAS - - No Adjustment Tool, Measuring Rod, Micrometer Head - 304mm 50mm
RS-stocknr. 157-4029
FabrikantnummerDY092
FabrikantStarrett
€ 101,12
Each
Aantal stuks
±0.0001 in - Imperial External UKAS - - No - - 25mm 0mm
RS-stocknr. 431-713
FabrikantnummerDY160
FabrikantStarrett
€ 230,00
Each
Aantal stuks
±0.01 mm - Metric Depth UKAS - - No - - 150mm 0mm
RS-stocknr. 603-198
FabrikantnummerDY161
FabrikantStarrett
€ 189,50
Each
Aantal stuks
±0.0004 in - Imperial Depth - - - No - - 152mm 0mm
RS-stocknr. 157-4041
FabrikantnummerDY094
FabrikantStarrett
€ 101,04
Each
Aantal stuks
±0.002 mm - Metric External UKAS - - No - - 25mm 0mm
RS-stocknr. 157-4035
FabrikantnummerDY093
FabrikantStarrett
€ 126,92
Each
Aantal stuks
±0.0001 in - Imperial External UKAS - - No - - 50mm 25mm
RS-stocknr. 157-1171
FabrikantnummerDY093
FabrikantStarrett
€ 86,42
Each
Aantal stuks
±0.0001 in - Imperial External - - - No - - 50mm 25mm
RS-stocknr. 157-1187
FabrikantnummerDY094
FabrikantStarrett
€ 60,54
Each
Aantal stuks
±0.002 mm - Metric External - - - No - - 25mm 0mm