Micrometer Heads 25 mm and 50 mm Range with 8 mm Spindle Diameter Series 151 - Medium-sized standard type with 8 diameter spindle. These micrometer heads are a medium-sized, standard type. They offer the following benefits: • 8 mm diameter spindle • Extremely sturdy micrometer head with or without a ratchet. 151-224 151-223 151-256 151-255 151-214 151-213 Metric No. Range [mm] Graduation Max. Permissible Error J MPE Spindle end Spindle pitch [mm] Stem Ø [mm] Stem Fixture thickness for clamp nut [mm] Special features Mass [g] 151-224 0 - 25 0,01 mm ±2 μm Flat 0,5 12 Plain 150 151-223 0 - 25 0,01 mm ±2 μm Flat 0,5 12 w/ clamp nut 25,5 155 151-222 0 - 25 0,001 mm ±2 μm Flat 0,5 12 Plain Graduation 0,001 mm 150 151-221 0 - 25 0,001 mm ±2 μm Flat 0,5 12 w/ clamp nut 25,5 Graduation 0,001 mm 155 151-227-10 0 - 25 0,01 mm ±2 μm Flat 0,5 12 Plain w/o ratchet stop 150 151-228-10 0 - 25 0,01 mm ±2 μm Flat 0,5 12 w/ clamp nut 25,5 w/o ratchet stop 155 151-256 0 - 50 0,01 mm ±4 μm Flat 0,5 12 Plain 240 151-255 0 - 50 0,01 mm ±4 μm Flat 0,5 12 w/ clamp nut 25,5 250 151-260-10 0 - 50 0,01 mm ±4 μm Flat 0,5 12 Plain w/o ratchet stop 240 151-259-10 0 - 50 0,01 mm ±4 μm Flat 0,5 12 w/ clamp nut 25,5 w/o ratchet stop 250 Metric With spindle lock No. Range [mm] Graduation Max. Permissible Error J MPE Spindle end Spindle pitch [mm] Stem Ø [mm] Stem Fixture thickness for clamp nut [mm] Special features Mass [g] 151-214 0 - 25 0,01 mm ±2 μm Flat 0,5 12 Plain 160 151-213 0 - 25 0,01 mm ±2 μm Flat 0,5 12 w/ clamp nut 15,5 165 151-212 0 - 25 0,001 mm ±2 μm Flat 0,5 12 Plain Graduation 0,001 mm 160 151-211 0 - 25 0,001 mm ±2 μm Flat 0,5 12 w/ clamp nut 15,5 Graduation 0,001 mm 165 151-225-10 0 - 25 0,01 mm ±2 μm Flat 0,5 12 Plain w/o ratchet stop 165 151-226-10 0 - 25 0,01 mm ±2 μm Flat 0,5 12 w/ clamp nut 15,5 w/o ratchet stop 165 Specifications Measuring face Carbide-tipped 0 5 45 ø21 29 (38) 17 70 (95) 63 ø120 -0.011 Ratchet ø8 151-224 5 45 0 Set screw ø21 29 ø8 (38) 63 (81.5) 3.5 56.5 ø12 0 -0.011 151-227-10 0 45 5 Set screw Locknut M12×0.5 ø16 ø21 4 29 ø8 (38) 63 56.5 (81.5) ø12 0 -0.011 151-228-10 ø12 - 0 0.011 ø8 29 (38) 103 88 0 5 45 ø21 17 Ratchet 151-256 0 5 45 ø21 17 Ratchet ø16 ø12 - 0 0.011 ø8 29 (38) 103 88 4 M12×0.5 Spindle lock 151-255 0 5 45 17 Ratchet ø22 Spindle lock 19 (28.6) 53.6 79.4 (104.4) ø12 0 -0.011 ø21 ø8 151-214 0 5 45 17 Ratchet ø21 ø22 19 (28.6) 53.6 79.4 (104.4) ø12 0 -0.011 ø8 4 ø16 M12x0.5 Locknut Spindle lock 151-213 ( ): with spindle full retracted All products to be sold to commercial customers. Product illustrations are without obligation. Product descriptions, 122 All products to be sold to commercial customers. Product illustrations are without obligation. Product descriptions, in particular any and all technical specifications, are only binding when explicitly agreed upon.
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