B-101BMitutoyo 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.Micrometer HeadThe origin of Mitutoyo’s trustworthy brand of small tool instruments Micrometer HeadsSERIES 148 — Fine Spindle Feed of 0.1mm/rev• Highly accurate 0.1mm pitch thread is only one-fth of that used for a standard-pitch head (0.5mm). • External dimensions are compatible with standard 0.5mm pitch heads. Spindle pitch   Pitch = 0.1mm   Pitch = 0.5mmApplications• Semiconductor-wafer positioning machinery and optical component alignment units, etc.• Precision X-Y table positioning • Precision adjustment of mirror in holder DIMENSIONSUnit: mmSleeve markerPlain stemStem locknutPlain stemSpherical faceSpherical faceStem locknut148-142 Mass: 31g908010200ø5ø9.5ø133.59.523.531.5(17)(38)SR4–0.0090Set ScrewFixture thickness: 6mm148-143 Spherical face Mass: 34gLocknut M9.5×0.5201080909.54ø14(38)(17)31.523.53.5ø13ø9.5ø5SR40−0.0090Set screw05SPECIFICATIONSMetricOrder No.RangeGraduationAccuracyStem dia.StemSpindle endSpindle pitchSpecial features148-1420 - 6.5mm0.002mm±2µm9.5mmPlainSpherical (SR4)0.1mm—148-143w/ clamp nut148-342PlainThicker & shorter thimble148-343w/ clamp nut148-242±5µm6mmPlainSpherical (SR3)Small thimble diameter148-243w/ clamp nut148-2440 - 5mm0.004mm3.5mmPlainSpherical (SR1.5)148-245w/ clamp nut9080102040451050(Operating range)(Operating range)005Scale: 6.5mm positionScale: 3mm position020.59.59.5(55)(58.5)6.520.5136.56.533.5Fine-pitch head(spindle pitch: 0.1mm)Standard pitch head(spindle pitch: 0.5mm)Comparison of mounting dimensions between a ne-pitch head and a standard-pitch head at the mid-range travel position. While the fine-pitch micrometer head has a measuring range of 6.5mm, the standard head has a larger range of 13mm. When replacing a standard head, the fine-pitch type can use the common range in the middle of the spindle travel. The standard and compact types of fine-pitch head are otherwise completely interchangeable. ( ): With spindle fully retracted.


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