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 833-6427
製造零件編號293-240-30
BrandMitutoyo
HK$1,811.90
單位
±1 μm 0.001 mm Metric External - - Yes - - 25mm 0mm
RS庫存編號 785-7834
BrandRS PRO
HK$908.91
單位
0.005 mm 0.01 mm Metric Internal - - No Barrel, Fitted Case with Adjustment Tools, Micrometer, Sleeve, Spindle Locking Screw - 30mm 5mm
RS庫存編號 705-1213
BrandRS PRO
HK$1,801.78
整套:1 個
Set(s)
±0.004 mm 0.01 mm Metric External - - No Setting Rod - 150mm 0mm
RS庫存編號 725-5702
BrandRS PRO
HK$224.55
單位
±0.004 mm 0.01 mm Metric External - - No Adjustment Tool, Case - 50mm 25mm
RS庫存編號 795-9915
製造零件編號368-914
BrandMitutoyo
HK$17,764.34
單位
- 0.005 mm Metric Internal - - No Extension Rod, Ring Gauge - 100mm 50mm
RS庫存編號 795-9906
製造零件編號368-913
BrandMitutoyo
HK$17,862.86
單位
- 0.005 mm Metric Internal - - No 368-166, 368-167, 368-168, 368-169 - 50mm 20mm
RS庫存編號 877-1791
BrandRS PRO
HK$4,249.05
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
RS庫存編號 833-6445
製造零件編號293-831-30
BrandMitutoyo
HK$1,546.00
單位
±0.0001 in 0.001 mm Both External - - Yes - - 1in 0in
RS庫存編號 794-3519
製造零件編號293-145-30
BrandMitutoyo
HK$2,455.31
單位
±1 μm 0.001 mm Metric Special - Yes Yes - - 25mm 0mm
RS庫存編號 833-6436
製造零件編號293-821-30
BrandMitutoyo
HK$1,513.60
單位
±2 μm 0.001 mm Metric External - - Yes - - 25mm 0mm
RS庫存編號 705-1210
BrandRS PRO
HK$1,229.28
單位
±0.002 mm 0.001 mm Both External - - Yes Battery, Case, User Manual Yes 50mm 25mm
RS庫存編號 572-101
製造零件編號103-138
BrandMitutoyo
HK$826.51
單位
±0.002 mm 0.01 mm Metric External - - No Adjustment Tool, Case, Stand, User Manual - 50mm 25mm
RS庫存編號 785-7840
BrandRS PRO
HK$2,161.79
單位
- 0.01 mm Metric Internal - - No Barrel, Micrometer, Sleeve, Spindle Locking Knob, Storage Case - 600mm 50mm
RS庫存編號 794-3522
製造零件編號293-140-30
BrandMitutoyo
HK$3,472.07
單位
±1 μm 0.001 mm Metric Special Yes Yes Yes - - 25mm 0mm
RS庫存編號 705-1229
BrandRS PRO
HK$616.60
單位
±0.002 mm 0.001 mm Both External - - Yes - Yes 25mm 0mm
RS庫存編號 667-3938
BrandRS PRO
HK$3,872.38
整套:1 個
Set(s)
±0.004 mm 0.001 mm Metric Internal - - No - - 20mm 12mm
RS庫存編號 705-1260
BrandRS PRO
HK$1,427.02
單位
±0.003 mm 0.001 mm Both Internal - - Yes Battery, Case, Setting Ring, User Manual Yes 30mm 5mm
RS庫存編號 785-7838
BrandRS PRO
HK$986.77
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 486-8260
製造零件編號293-345
BrandMitutoyo
HK$2,984.38
單位
±0.00005 in 0.00005 in Both External - - Yes Battery, Case, User Manual Yes 2in 1in
RS庫存編號 705-1216
BrandRS PRO
HK$994.50
單位
±0.002 mm 0.001 mm Both External - - Yes Battery, Case, User Manual Yes 25mm 0mm