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Disc Micrometer-Carbide Tip

The Mitutoyo Digimatic coolant-proof disc digital micrometer is designed to measure the root tangent length of spur gears and helical gears within +/- 0.0002” of accuracy.

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Features & Benefits

The Mitutoyo disc micrometer uses flat discs constructed of hardened steel in our own Japanese facilities to measure lengths of spur and helical gears. The flatness and thinness of the discs allow for measurements in tight spaces with reliability. A ratchet-stop mechanism helps provides uniform pressure on a workpiece for precise, repeatable measurements and eliminates over-speed error. Measurements are displayed on an easy-to-read LCD readout.

  • Available in Metric and Inch/Metric models
  • Diameter of measuring disc is .787” / 20mm
  • Disc edge thickness is 0.7mm / .028” to enter narrow recesses; disc edge thickness on models over 100mm is 1mm
  • Measuring surfaces are constructed of carbide to reduce wear
  • IP65 protection enables use in environments exposed to cutting oil, coolant, dust, etc., for most shop floor environments
  • Ratchet mechanism provides an audible click to ensure measurement is performed with constant force
  • SPC output function allows for quick and easy data management in real time
  • Functions include Origin Set, Zero/ABS Setting, Data Hold, Data Output, Function Lock, and inch/mm conversion (on inch/metric models only)
  • Alarm: Low Voltage, Counting Value Composition Error
  • Satin chrome finish on the sleeve and laser etched measurements on thimble for easier reading
  • Frame has a non-slip finish for better grip in shop environments
  • Supplied in fitted plastic case
  • IP65 protection permits use in environments exposed to cutting oil, dust, etc.**

**Anti-corrosion treatment is required after use

SERIES 323 Technical Data
Technology: Digimatic
IP Rating: IP65
SPC Output: Yes
Ratchet/Thimble: Ratchet Stop
Display: LCD
Battery: SR44 (1 pc.) 938882
Battery Life: Approx. 2.4 years under normal use
Product List
Order No.: Product Image: Units: Range: Resolution: Accuracy: Mass: Graduation: Flatness: Parallelism: Disk Diameter: Optional Accessories:
323-250-30 Metric 0-25mm 0.001mm ±4µm 290g 0.01mm 1µm 4µm or less 20 ømm -
323-251-30 - Metric 25-50mm 0.001mm ±4µm 355g 0.01mm 1µm 4µm or less 20 ømm -
323-252-30 - Metric 50-75mm 0.001mm ±6µm 555g 0.01mm 1µm 6µm or less 20 ømm -
323-253-30 - Metric 75-100mm 0.001mm ±6µm 610g 0.01mm 1µm 6µm or less 20 ømm -
323-350-30 Metric, Inch 0-1" / 0-25.4mm 0.00005" / 0.001mm ±0.0002" / ±4µm 290g 0.001" / 0.01mm 1µm 0.00016" or less / 4µm or less 0.787 øinch / 20 ømm -
323-351-30 - Metric, Inch 1-2" / 25.4-50.8mm 0.00005" / 0.001mm ±0.0002" / ±4µm 355g 0.001" / 0.01mm 1µm 0.00016" or less / 4µm or less 0.787 øinch / 20 ømm -
323-352-30 - Metric, Inch 2-3" / 50.8-76.2mm 0.00005" / 0.001mm ±0.0003" / ±6µm 555g 0.001" / 0.01mm 1µm 0.00024" or less / 6µm or less 0.787 øinch / 20 ømm -
323-353-30 - Metric, Inch 3-4" / 76.2-101.6mm 0.00005" / 0.001mm ±0.0003" / ±6µm 610g 0.001" / 0.01mm 1µm 0.00024" or less / 6µm or less 0.787 øinch / 20 ømm -