MEASURING INSTRUMENTS CATALOG No.E2021
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F-55FMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.Dial IndicatorsComparison measuring instruments which ensure high quality, high accuracy and reliability.• Back Plunger type dial indicators are suitable for mounting onto leveling machine tool tables or inspection jigs, and for use in small spaces where the graduations of standard dial indicators are difcult to see. • Mitutoyo’s proprietary shock-proong mechanism provides excellent durability and shock resistance. • Model 2990A-10 provides 0.001 mm graduation.Back Plunger Type Dial IndicatorsSERIES 2Metric Order No.Graduation (mm)Range (range/rev) (mm)Maximum permissible error (MPE) (µm)Dial readingMeasuring force (N)Indication errorHysteresisRepeat-ability1/10 Rev1/2 Rev1 RevMeasuring range2960A0.011 (1.27)8——144350-0-501.4 or less2990A-100.0010.1 (0.14)2.5——52150-0-501.5 or lessMetricOrder No.101002960A44442990A-1044444InchOrder No.101002961A44442991A-1044444 ISO/JIS typeInch Order No.Graduation (in)Range (range/rev) (in)Accuracy (in)Repeatbility (in)Dial readingMeasuring force (N)First 1 Rev/2.5 Rev/10 RevRetrace2961A0.00050.04/0.05±0.0005/—/—0.00016±0.000120-0-201.4 or less2991A-100.00010.008/0.01±0.0002/—/—0.0001±0.000054-0-41.5 or less ANSI/AGD typeDIMENSIONS Unit: mmUnit: inISO/JIS TypeANSI/AGD TypeHolding bar (optional) Order No.øD (mm)L (mm)21AAA166ø642136567ø681124625ø6.358121AAA167ø6.354221AAA168ø842136568ø881Note: øD and L: detail shown in drawing below.Optional Accessory• Limit hand (2 pcs.): 21AZB1952960A2990A-102960A One revolution Shockproof Back Plunger2990A-10 One revolution Shockproof Back Plunger Jeweled bearingBalanced scale Balanced scale Graduation: 0.01 mm, Measuring range: 1 mmGraduation: 0.01 mm, Measuring range: 1 mmAn inspection certicate is supplied as standard. Refer to page U-9 for details.2990A-102960A2991A-102961ANote 1: The shoulder on a contact point (standard accessory) for 2960A and 2961A acts as a stop to prevent spindle overrun that may otherwise damage the indicator. For this reason, if you need to install an optional contact point with an outside diameter smaller than 7 mm, use a washer (with outside diameter of at least 7 mm, inside diameter of 3 mm, and thickness of approx. 0.5 mm) placed between the contact point and the spindle.Note 2: Refer to pages F-57 to F-60 for details of contact points.Note 1: Completed products inspection is performed in the vertical orientation (contact point downward) and the stated accuracy is guaranteed.Note 2: The bezel clamp cannot be used.Note 1: Completed products inspection is performed in the vertical orientation (contact point downward) and the stated accuracy is guaranteed.Note 2: The bezel clamp cannot be used.1010010100ø8 0-0.009ø4øDL23.3ø5728.717.522.2ø35.6465Holding bar (optional)(ø6 only)M2.5×0.45ø8 0-0.009ø4LøD25.5ø5126.517.559.5ø5739.15ø58Holding bar (optional)M2.5×0.45Holding bar (optional)(ø0.24 Only)Ball contact (ø0.12)21BZB056(thread: No. 4-48 UNF)0.980.200.92ø2.240.87LøD0.43ø1.40ø0.375 0-0.0012ø0.16Holding bar (optional)Ball contact (ø0.12)21BZB005(thread: No. 4-48 UNF)0.201.04ø2.28ø2.241.54øD1.00L0.53ø2.01ø0.375 0-0.0012ø0.16Holding bar

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