C-23CMitutoyo operates a policy of continuous improvement that aims to provide the customer with the benet of the latest technological advances.Therefore the company reserves the right to change any or all aspects of any product specication without notice.• Carbide measuring faces.• Equipped with a constant measuring-force device.• Setting ring (nominal size below 300mm), CERA Inside Micro Checker (more than 50mm), and Gauge Block accessory set are provided as a reference gage for datum adjustment (refer to page C-47, C-26, and E-17 - E20 for details). Inside MicrometersSERIES 345, 145 — Caliper Type* This instrument requires the cap and the holder for mounting on a micrometer stand.Holder (No.300400)Cap (No.300401)145-185145-187345-250-30Inside MicrometersFor easy and accurate measurement of inside diametersSPECIFICATIONSMetricOrder No.RangeResolutionAccuracy* MassDigimatic (LCD)345-250-305 - 30mm0.001mm±5µm320g345-251-3025 - 50mm±6µm325g* Excluding quantizing error Inch/MetricOrder No.RangeResolutionAccuracy* MassDigimatic (LCD)345-350-30.2" - 1.2".00005"/ 0.001mm±.00025"320g345-351-301" - 2"±.0003"325g* Excluding quantizing error MetricOrder No.RangeGraduatonAccuracyMassAnalog145-1855 - 30mm0.01mm±5µm130g145-18625 - 50mm±6µm140g145-18750 - 75mm±7µm160g145-18875 - 100mm±8µm180g145-189100 - 125mm±9µm210g145-190125 - 150mm230g145-191150 - 175mm±10µm250g145-192175 - 200mm270g145-217200 - 225mm±11µm310g145-218225 - 250mm330g145-219250 - 275mm±12µm350g145-220275 - 300mm370gInchOrder No.RangeGraduatonAccuracyMassAnalog145-193.2" - 1.2".001"±.00025"130g145-1941" - 2"±.0003"140g145-1952" - 3"±.00035"160g145-1963" - 4"±.0004"180gBattery and scale type(for 345-250-30/251-30/350-30/351-30)SR44 (1 pc), 938882, for initial operational checks (standard accessory) Battery life: Approx. 2.4 years under normal useScale type: Electromagnetic induction-type rotary encoderOptional accessoriesRefer to page A-21 for detailsConnecting cables for Input Tool/ Digimatic Mini-Processor, etc. 1m: 05CZA662 2m: 05CZA663USB Input Tool Direct (2m): 06ADV380BConnecting cables for U-WAVE-T For standard (160mm): 02AZD790B For foot switch: 02AZE140BAccessories for 145-185/186/193/194 (optional)


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