E-3EMitutoyo reserves the right to change any or all aspects of any product specication, including prices, designs and service content, without notice.(1) Corrosion ResistantAnti-corrosion treatment is not required when handled normally (i.e. with ngers), resulting in simple maintenance and storage.(2) No Burrs Caused by Accidental MishandlingSince the CERA Block is very hard, it will not scratch easily and is highly resistant to burrs. If a burr is formed, it can easily be removed with a ceramic deburring stone (Ceraston).(3) Abrasion Resistant CERA Blocks have 10 times the abrasion resistance of steel gauge blocks.(4) Dimensionally Stable CERA Blocks are free from dimensional change over time.(5) Clearly Marked SizesBlack characters, indicating the nominal length, are inscribed by laser and are clearly visible against the white surface of the block.(6) Non-magnetic Nature Prevents Steel Swarf Contamination(7) High Wringing Force Superior atness and surface nish provides maximum wringing force.Features and AccuraciesSelecting Gauge Blocks• Select gauge blocks in accordance with the combination range required.If a large length is required, use one or more blocks from a long-block set.• Select gauge blocks in accordance with the minimum length step required. Add a wear block at each end of the stack if the workpiece material is abrasive, or the stack will be used frequently. • If a set containing a large number of gauge blocks is selected, the number of gauge blocks required for any particular length is reduced and the number of combinations is increased. Accuracy of the blocks in the set will be retained longer because normal wear will be spread over a larger number of blocks.• Gauge block sets dedicated to micrometer and caliper inspection are available (refer to page E-11 for details).• If using only one length repeatedly, it is a good idea to purchase discrete gauge blocks (refer to pages E-13, E-14, E-15, E-16, E-23, and E-24 for details) .• Products can be provided in combinations other than those in our standard sets. When placing such orders, please specify whether a storage box is required. Feel free to consult us if you need gauge blocks compliant with British (BS), American, or other standards. The U.S. Federal Specication for gauge blocks was replaced by ASME B89.1.9 in 2002. Please contact your local Mitutoyo sales ofce for further information.• 2 mm-based gauge blocks, which take the base of the minimum length step as 2 mm, are available and many people nd them easier to handle than 1 mm-based gauge blocks.• All Mitutoyo gauge blocks, whether sold in sets or individually, come with a measurement inspection certicate.Features of Mitutoyo Gauge BlocksAccuracyMitutoyo offers 3 types of gauge block for use as length standards: rectangular steel, rectangular ceramic (CERA Blocks) and square steel gauge blocks. In addition, rectangular and square protection blocks (1 mm and 2 mm for each) are available in tungsten carbide. Mitutoyo gauge blocks are recognized to be of the highest quality both here in Japan and abroad, and are available in various grades to meet every need in respect of working conditions, environment and application.As a world-leading precision measuring equipment manufacturer, Mitutoyo is certied by the Japanese government as an accredited calibration laboratory, which means that the accuracy of its gauge blocks is guaranteed through traceability to the Metrology Management Center of the National Institute of Advanced Industrial Science and Technology (AIST).Wringing Lapping measuring surfaces is one of Mitutoyo’s specialties. Our advanced technique, developed over more than half a century, enables us to achieve the optimum atness and surface nish needed for gauge blocks and thus maximize the wringing force.Abrasion Resistance and Dimensional Stability of Steel BlocksHigh-carbon high-chrome steel is employed to satisfy a variety of the material characteristics required for gauge blocks. Our advanced heat treatment technology for steel blocks, which involves repeated temperature cycling, simultaneously achieves excellent abrasion resistance and minimizes any change in length over time. CERA BlocksCERA blocks are made of a ceramic material with a superior surface nish, created by Mitutoyo’s ultra-precision machining techniques, that provides a premium quality block with signicant advantages: Abrasion loss dataSteelTungsten carbideCERA Block200000.20.4Abrasion loss (µm)400060008000Sliding distance (m)30 or 35 mm *9Hole ø6.7Rectangular gauge blocksSquare gauge b* Depends on the nominal size. More than 10 mm: 35 mm 10 mm or less: 30 mm Nominal size-0.05-0.2 0-0.330 or 35 mm *24.1924.1Hole ø6.7 Rectangular gauge blocksSquare gauge blocks* Depends on the nominal size. More than 10 mm: 35 mm 10 mm or less: 30 mm Nominal sizeNominal size-0.05-0.2 0-0.3±0.1±0.1Gauge BlocksLength Standards Brought to You by MitutoyoClassication of Gauge Blocks by ShapeMitutoyo broadly divides gauge blocks into two categories according to the block shape.Long rectangular gauge blocks25±0.535–0.3025±0.5Airy point markers2×ø10Nominal size (L)L×0.2119–0.2–0.05All standard long blocks 125 mm or more have two coupling holes on the body.

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