B-31BMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.MicrometerThe origin of Mitutoyo’s trustworthy brand of small tool instrumentsDisk MicrometersSERIES 323, 223, 123 • Measures “root tangent length” of spur gears and helical gears.• Determination of the root tangent length: refer to “Quick Guide to Precision Measuring Instruments”.• Equipped with Ratchet Stop for constant measuring force.• Supplied with a setting standard (except for 0-25 mm/0-1 in measuring range). 123-101323-250-30123-103SPECIFICATIONSMetricOrder No.Range (mm)Resolution (mm)Accuracy* (µm)Anvil dia. (mm)Measurable moduleDigimatic (LCD)323-250-300 - 250.001±4ø200.5 - 6 323-251-3025 - 50323-252-3050 - 75±6323-253-3075 - 100* Excluding quantizing error of ±1 countMetricOrder No.Range (mm)Graduation (mm)Accuracy (µm)Anvil dia. (mm)Measurable moduleMechanical counter model223-1010 - 250.01 ±4ø200.5 - 6 223-10225 - 50Analog123-1010 - 250.01 ±4ø200.5 - 6123-113*123-10225 - 50123-114*123-10350 - 75±6123-115*123-10475 - 100123-116*123-105100 - 125±7ø300.7 - 11123-106125 - 150123-107150 - 175±8123-108175 - 200123-109200 - 225123-110225 - 250±9123-111250 - 275123-112275 - 300* The measuring disks have carbide tips.Note 1: For functional details of series 323, refer to page B-8. Optional connecting cable is available only for water-proof type (Digimatic model).Note 2: Root tangent length measurement is not available for some types of gears.Inch/MetricOrder No.Range (in)ResolutionAccuracy* (in)Anvil dia. (in)Measurable moduleDigimatic (LCD)323-350-300-10.00005 in/0.001 mm±0.00020.7870.5 - 6 323-351-301-2323-352-302-3±0.0003323-353-303-4* Excluding quantizing error of ±1 countInchOrder No.Range (in)Graduation (in)Accuracy (in)Anvil dia. (in)Measurable moduleMechanical counter model223-1250-10.001±0.00020.7870.5 - 6Analog123-1250-10.001±0.00020.7870.5 - 6123-1261-2123-1272-3±0.0003123-1283-4These marks indicate that a product has successfully passed IP65-level testing, which is carried out by the independent German certication organization TÜV Rheinland.0000040191Products equipped with the measurement data output function can be connected to the measurement data network system MeasurLink (refer to page A-5 for details).IP Codes (series 323)Level 6:Dust-proof.No ingress of dust allowed. Level 5:Protected against water jets.Water projected in jets against the enclosure from any direction shall have no harmful effects. Technical Data• Flatness: 1 µm/0.00004 in for models up to 100 mm/4 in1.6 µm/0.000063 in for models over 100 mm/4 in• Parallelism:4 µm for models up to 50 mm 0.0002 in for models up to 2 in6 µm for models up to 100 mm0.0003 in for models up to 4 in(5 + R/75) µm for models over 100 mm, R = max. range (mm)fraction rounded upRoot Tangent Length of Gear (En) Root tangent lengthTechnical Data• Battery for series 323 SR44 (1 pc.), 938882, for initial operational checks (standard accessory)• Battery life: Approx. 2.4 years under normal use (for series 323) • Length standard: Electromagnetic rotary sensor (for series 323)• Standard accessories: Reference bar, 1 pc. (except for measuring range 0-25 mm (0-1 in) models) Spanner (301336), 1 pc.Optional Accessories for Series 323• Connecting cables 1 m: 05CZA662 2 m: 05CZA663• USB Input Tool Direct USB-ITN-B (2 m): 06AFM380B• U-WAVE-T dedicated connection cable 160 mm: 02AZD790B For foot switch: 02AZE140B Refer to page A-25 for details.Wireless Data Output • U-WAVE-TM264-622 (IP67 type)264-623 (Buzzer type)• Connecting unit for U-WAVE-TM 02AZF310 (IP67/buzzer type common specication) Refer to page A-15 for details.