Micrometers

What are 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 calipers e.g. opposing ends joined by a frame.
Micrometers are composed of:
• 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.
• Lock nut / 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 end of 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: caliper-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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Description Price Accuracy Resolution Imperial or Metric Micrometer Type SPC Data Output Data Processing Battery Operated Set Contents Metric-Imperial Conversion Maximum Measurement Minimum Measurement
RS庫存編號 833-6423
製造零件編號293-230-30
BrandMitutoyo
TWD10,426
單位
±1 μm 0.001 mm Metric External Yes - Yes - - 25mm 0mm
RS庫存編號 796-0019
製造零件編號7822
BrandMitutoyo
TWD1,952
單位
- - Metric Internal - - No Flat Point 10 mm, Flat Point 5 mm, Needle Point, Shell Type Point, Spherical Point - - -
RS庫存編號 833-6427
製造零件編號293-240-30
BrandMitutoyo
TWD7,539
單位
±1 μm 0.001 mm Metric External - - Yes - - 25mm 0mm
RS庫存編號 353-3682
製造零件編號293-676
BrandMitutoyo
TWD13,806
單位
±0.0001 in 0.00005 in Both External Yes Yes Yes Battery, Case, User Manual Yes 1.2in 0in
RS庫存編號 785-7878
BrandRS PRO
TWD980
單位
0.003 mm 0.01 mm Both Special - - No Adjustment Tools, Barrel, Sleeve - 25mm 0mm
RS庫存編號 157-1165
製造零件編號DY092
BrandStarrett
TWD2,744
單位
±0.0001 in - Imperial External - - No - - 1in 0in
RS庫存編號 572-123
製造零件編號103-139-10H
BrandMitutoyo
TWD4,090
單位
±0.002 mm 0.01 mm Metric External - - No Adjustment Tool, Case, Stand, User Manual - 75mm 50mm
RS庫存編號 667-3938
BrandRS PRO
TWD14,091
整套:1 個
Set(s)
±0.004 mm 0.001 mm Metric Internal - - No - - 20mm 12mm
RS庫存編號 397-6584
製造零件編號102-217
BrandMitutoyo
TWD1,874
單位
±0.002 mm 0.01 mm Metric External - - No Case, Gauge - 25mm 0mm
RS庫存編號 572-088
製造零件編號103-137
BrandMitutoyo
TWD2,282
單位
±0.002 mm 0.01 mm Metric External - - No Adjustment Tool, Case, User Manual - 25mm 0mm
RS庫存編號 157-1171
製造零件編號DY093
BrandStarrett
TWD3,569
單位
±0.0001 in - Imperial External - - No - - 2in 1in
RS庫存編號 833-6436
製造零件編號293-821-30
BrandMitutoyo
TWD5,687
單位
±2 μm 0.001 mm Metric External - - Yes - - 25mm 0mm
RS庫存編號 785-7838
BrandRS PRO
TWD3,447
單位
0.005 mm 0.01 mm Metric Internal - - - Barrel, Fitted Case with Adjustment Tools, Micrometer, Sleeve, Spindle Locking Screw - 50mm 25mm
RS庫存編號 136-8094
BrandRS PRO
TWD5,662
單位
- - Both External - - - - Yes 75mm 0mm
RS庫存編號 248-9180
BrandRS PRO
TWD4,731
單位
±0.004 mm 0.01 mm Metric External - - No Adjustment Tool, Case - 25mm 0mm
RS庫存編號 705-1279
BrandRS PRO
TWD7,527
單位
±0.002 mm 0.001 mm Both Special - - Yes Battery, Case, User Manual Yes 25mm 0mm
RS庫存編號 397-6590
製造零件編號102-218
BrandMitutoyo
TWD2,826
單位
±0.002 mm 0.01 mm Metric External - - No Case, Gauge - 50mm 25mm
RS庫存編號 833-6442
製造零件編號293-340-30
BrandMitutoyo
TWD7,529
單位
±0.00005 in 0.001 mm Both External - - Yes - - 1in 0in
RS庫存編號 572-072
製造零件編號103-177
BrandMitutoyo
TWD2,313
單位
±0.0001 in 0.001 in Imperial External - - No Adjustment Tool, Case, User Manual - 1in 0in
RS庫存編號 877-1791
BrandRS PRO
TWD12,495
單位
±0.003 mm 0.001 mm Metric Depth - - Yes Ratchet Stop, Setting Rods, Spindle Lock, Supplied in Fitted Case, Tungsten Carbide Anvils Yes 158mm 0mm