B-109BMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.Micrometer HeadThe origin of Mitutoyo’s trustworthy brand of small tool instruments Micrometer HeadsSERIES 250 — Digit Counter Type• Digit counter for easy reading of spindle movement. Micro JackSERIES 7• Used for accurate leveling of machines, surface plates, and other precision instruments.• Zero-setting is possible at any position.• Easy adjustment under heavy load.DIMENSIONSDIMENSIONSUnit: mmUnit: mmPlain stem( ): with spindle fully retracted.250-301Mass: 165 g000099mm15(17)4293.8(118.8)ø18ø10ø6.350–0.0090545Ratchet Spindle lock26.815ø40(Recessed)ø64ø15608(85)SR1×90°SPECIFICATIONSMetricOrder No.Stroke (mm)Graduation (mm)Stem dia. (mm)StemSpindle endSpindle pitch (mm)Graduation featuresAccuracy (µm)250-301250.0110PlainFlat (carbide tip)0.5—±2InchOrder No.Stroke (in)Graduation (in)Stem dia. (in)StemSpindle endSpindle pitch (in)Graduation featuresAccuracy (in)250-31210.00010.375PlainFlat (carbide tip)0.025Vernier scale±.0001SPECIFICATIONSMetricOrder No.Stroke (mm)Graduation (mm)Remarks (kg)Handle power at the max. loading (N)785060 - 750.01Max. load: 40090Technical Data• Measuring face Material: Carbide Hardness: 90 HRA or more Lapped• Scale nishing: Satin-chrome platedTechnical Data• Measuring face Material: Alloy tool steel Hardness: 60 HRC or more Lapped• Scale nishing: Satin-chrome plated

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