313 MISUMI Linear Guides have a datum surface (a surface with a straight groove) on both the rail and block. (See the diagram below.) When installing Linear Guides, correctly match the datum of the guides and installation bases. Linear Guides are designed to obtain accuracies when mounted on base plates. Generally, the datum plane is placed against the shoulder on the mounting surface. In that case, corners should have reliefs or corner radius should be machined smaller than chamfering of rails and blocks. See each product page for chamfering dimensions of products. Blocks may be deformed depending on its mounting surface flatness. Block deformation may cause clearance, which might give less/more preload and cause sliding defects. Securing 5μ mounting surface flatness is recommended. t*OTUBMMBUJPO &SSPS 5PMFSBODF JT UIF WBMVF XIJDI EPFT OPU JOGMVFODF PQFSBUJOH MJGF VOEFS DPNNPO VTBHF Type Radial Clearance Parallelism Error Tolerance of 2 Axes (P) Height Error Tolerance of 2 Axes (S) Existing Products Medium/Heavy Load Type Light Preload, Normal Clearance 20μm or Less 330μm or Less / 500mm Cost Efficient Products H24 H28 H30 Normal Clearance 25μm or Less 130μm or Less / 500mm H33 H36 H40 30μm or Less 130μm or Less / 500mm H42 H45 40μm or Less 170μm or Less / 500mm Miniature Type (Common to Existing Products) Light Preload 6μm or Less 15μm or Less / 200mm Slight Clearance 10μm or Less 30μm or Less / 200mm Running Parallelism Error Tolerance Height Error Tolerance P 200/500 S 2Installation Method of Linear Guides 2Mounting Surface Shape 2Block Mounting Surface Flatness 2Installation Error Tolerance Installation Error Tolerance Miniature Linear Guides Linear Guides for Medium/Heavy Load Common to Existing Products Existing Products Existing Products (with Plastic Retainer) Cost Efficient Products Datum Plane Mark Datum Plane Mark Datum Plane Mark Datum Plane Mark Reference Plane (Polishing Surface) Thin Groove Thick Groove Linear Guide Installation and Maintenance
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