B-8BMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.Functions Origin point setting (ABS measurement system): Resets the ABS origin at the current spindle position to the minimum value of the measuring range and switches to ABS mode. Zero-setting: A brief press on the ZERO/ABS button sets display to zero at the current spindle position and switches to the incremental (INC) measuring mode. A longer press resets to the ABS measuring mode. Hold: Pressing the HOLD button freezes the current value in the display. This function is useful for preserving a measurement in situations of poor visibility where the instrument must be moved away from the workpiece before the reading can be recorded. Data output*: Models equipped with this function have an output port for transferring measurement data to a Statistical Process Control (SPC) system. * Only models with the data output functionAuto power ON/OFF: The reading on the LCD disappears after this instrument is idle for about 20 minutes, but the reading and measurement mode are retained. Turning the spindle causes the reading to reappear.Error alarm: In case of an overow on the LCD or a computing error, an error message appears on the LCD, and the measuring function stops. This prevents an instrument from giving an erroneous reading. Also, when the battery voltage drops to a certain level, the low-battery-voltage alarm annunciator appears well before the micrometer becomes unusable. Function lock: This function allows the ORIGIN (origin point setting) function and the ZERO (zero-setting) function to be locked to prevent these points being reset accidentally. DIMENSIONSUnit: mmRatchet stopRatchet thimble typeInch/MetricOrder NoRange (in)ResolutionMaximum permissible error JMPE (in)Parallelism (in)Constant-force deviceMass (g)with SPC data output293-330-300 - 10.00005 in /0.001 mm±0.00005 0.00004 With ratchet stop270293-331-301 - 2330293-332-302 - 3±0.0001 0.00008 470293-333-303 - 4625293-350-304 - 50.0001 in /0.001 mm0.00012 600293-351-305 - 6740293-352-306 - 7±0.00015 800293-353-307 - 80.00016 970293-354-308 - 91100293-355-309 - 10±0.0002 1270293-356-3010 - 111370293-357-3011 - 120.0002 1590293-334-300 - 10.00005 in /0.001 mm±0.00005 0.00004 With ratchet thimble280293-335-30With friction thimble275293-336-301 - 2335without SPC data output293-340-300 - 10.00005 in/0.001 mm±0.00005 0.00004 With ratchet stop270293-341-301 - 2330293-342-302 - 3±0.0001 0.00008 470293-343-303 - 4625293-344-300 - 1±0.00005 0.00004 With ratchet thimble280293-345-301 - 2340293-346-302 - 3±0.0001 0.00008 480293-347-303 - 4635293-348-300 - 1±0.00005 0.00004 With friction thimble275Note: All digits of models over 125 mm (5 in) measuring range are presettable. SPECIFICATIONSMetricOrder NoRange (mm)Resolution (mm)Maximum permissible error JMPE (µm)Parallelism (µm)Constant-force deviceMass (g)with SPC data output293-230-300 - 250.001±11With ratchet stop270293-231-3025 - 50330293-232-3050 - 75±22470293-233-3075 - 100625293-250-30100 - 1253600293-251-30125 - 150740293-252-30150 - 175±3800293-253-30175 - 2004970293-254-30200 - 2251100293-255-30225 - 250±41270293-256-30250 - 2751370293-257-30275 - 30051590293-234-300 - 25±11With ratchet thimble280293-235-3025 - 50340293-236-3050 - 75±22480293-237-3075 - 100635without SPC data output293-240-300 - 250.001±11With ratchet stop270293-241-3025 - 50330293-242-3050 - 75±22470293-243-3075 - 100625293-244-300 - 25±11With ratchet thimble280293-245-3025 - 50340293-246-3050 - 75±22480293-247-3075 - 100635Note: All digits of models over 125 mm (5 in) measuring range are presettable. ø18a10.866.562.9252Lbcø6.3 (Anvil) (Minimum measuring length)ø6.3 (Measuring face)ø6.35（Spindle）Range (mm)Order No.Labc 0 - 25293-230-30/293-240-3006.5252.525 - 50293-231-30/293-241-30257.332.550 - 75293-232-30/293-242-305010.147 75 - 100293-233-30/293-243-307511.560 0 - 25293-234-30/293-244-3006.52525 - 50293-235-30/293-245-30257.332.5100 - 125293-250-3010016.7765.3125 - 150293-251-3012518.8905.7150 - 175293-252-3015019.11036.1175 - 200293-253-3017518.21156.3200 - 225293-254-3020016.81266.7225 - 250293-255-30225181395.5250 - 275293-256-302501526.5275 - 300293-257-302751661"(25.4mm) 最大測定長時(スピン ドル径)146.1251025.149.7ø6.35ø6.3 (測定面)1.625.4ø6.3 (測定面)10.848.5925.42.51.651.2ø18Ratchet stop type over 100 mmMeasuring range: 100 mm or lessFriction thimble typeL2.52562.949.510.8aø18ø6.3514.52cbø19.363.610.862.9ø1848.5aø6.35（Spindle）L252cbø6.3(Measuring face)ø6.3(Anvil) (Minimum measuring length)L2.52562.949.510.8ø18ø6.3514.52ø19.363.610.862.9ø1848.5aø6.35（Spindle）L252cbø6.3(Measuring face)ø6.3(Anvil) (Minimum measuring length)
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