Micrometers | Micrometer Screw Gauge | RS
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    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

    151 Producten voor Micrometers

    RS PRO
    -
    ±0.004 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Case
    50mm
    25mm
    RS PRO
    -
    ±0.004 mm
    0.01 mm
    Metric
    External
    UKAS
    Adjustment Tool, Case
    50mm
    25mm
    RS PRO
    -
    ±0.009 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    275mm
    250mm
    RS PRO
    -
    ±0.004 mm
    0.01 mm
    Metric
    External
    -
    Setting Rod
    150mm
    0mm
    RS PRO
    Metric-Imperial Conversion
    -
    -
    Both
    Deep Throat
    -
    -
    25mm
    0mm
    RS PRO
    -
    0.004 mm
    0.005 mm
    Metric
    Internal
    -
    -
    50mm
    40mm
    RS PRO
    -
    -
    0.01 mm
    Metric
    Internal
    -
    Micrometer, Spindle Locking Knob, Barrel, Sleeve, Storage Case
    600mm
    50mm
    RS PRO
    -
    ±0.007 mm
    0.01 mm
    Metric
    External
    UKAS
    Adjustment Tool, Storage Case
    175mm
    150mm
    RS PRO
    -
    ±0.007 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    200mm
    175mm
    RS PRO
    -
    ±0.004 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Case
    25mm
    0mm
    RS PRO
    -
    ±0.005 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    100mm
    75mm
    RS PRO
    -
    ±0.005 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    75mm
    50mm
    RS PRO
    Battery Operated,Metric-Imperial Conversion
    ±0.002 mm
    0.001 mm
    Both
    External
    -
    Battery, Case, User Manual
    25mm
    0mm
    RS PRO
    -
    ±0.01 mm
    -
    Metric
    Special
    UKAS
    -
    25mm
    0mm
    RS PRO
    -
    -
    0.01 mm
    Metric
    Internal
    -
    Micrometer, Spindle Locking Knob, Barrel, Sleeve, Storage Case
    250mm
    50mm
    RS PRO
    -
    ±0.006 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    125mm
    100mm
    RS PRO
    Battery Operated,Metric-Imperial Conversion
    ±0.003 mm
    0.001 mm
    Both
    Internal
    -
    Battery, Case, Setting Ring, User Manual
    30mm
    5mm
    RS PRO
    -
    ±0.006 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    150mm
    125mm
    RS PRO
    -
    ±0.0011 mm
    0.01 mm
    Metric
    Interchangeable
    UKAS
    1 x Adjustable extension anvil, 2 x Standard collars, 2 x Settings rods, Adjustment tools, Fitted case.
    400mm
    300mm
    RS PRO
    -
    ±0.008 mm
    0.01 mm
    Metric
    External
    -
    Adjustment Tool, Storage Case
    250mm
    225mm
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