ZERO CERA Blocks Specifications Accuracy EN ISO 3650 Coefficient of thermal expansion 0 ± 0.02 x 10-6/K (at 20°C)*2 Density 2.5 g/cm3*2 Standard accessories Inspection certificate, Calibration certificate and custom-made aluminium case *1 If you require a grade other than K, please contact Mitutoyo. *2 Value claimed by the material supplier. Ultra-low Expansion Ceramic Gauge Blocks These are ultra-low expansion ceramic gauge blocks. The ZERO CERA Blocks offer you the following benefits: • Thermal expansion at 20 ±1°C is less than 1/500 that of steel. • There is almost no secular change either in the dimension or coefficient of thermal expansion. • You will find them light and easy to handle. • They are rust free. • They are magnetisation free. Calibration Certificate Metric No. Accuracy Remarks Length Type Mass [g] 617673-016 EN ISO 3650, Grade K 30 mm Individual 24 617675-016 EN ISO 3650, Grade K 50 mm Individual 40 617681-016 EN ISO 3650, Grade K 100 mm Individual 80 617682-016 EN ISO 3650, Grade K 200 mm Individual 160 617683-016 EN ISO 3650, Grade K 300 mm Individual 240 617684-016 EN ISO 3650, Grade K 400 mm Individual 320 617685-016 EN ISO 3650, Grade K 500 mm Individual 400 617840-016 EN ISO 3650, Grade K 600 mm Individual 480 617841-016 EN ISO 3650, Grade K 700 mm Individual 560 617843-016 EN ISO 3650, Grade K 800 mm Individual 640 617844-016 EN ISO 3650, Grade K 900 mm Individual 720 617845-016 EN ISO 3650, Grade K 1000 mm Individual 800 516-771-60 EN ISO 3650, Grade K Zero Cera Block set. 12 blocks per set, 30 mm (1 block) 50 mm (1 block) 100 - 1000 mm (100 mm step / 10 blocks) Set 4464 Characteristics comparison of gauge block materials ZERO CERA BLOCK Low expansion glass CERA BLOCK Steel Tungsten carbide Coefficient of thermal expansion (10-6/K) 0 ± 0,02 *2) *3) 0 ± 0,02 *2) *3) 9,3 ± 0,5 10,8 ± 0,5 5,5 ± 1 Thermal conductivity (W/m*K) 3,7 1,7 2,9 54,4 79,5 Specify gravity 2,5 2,55 6 7,8 14,8 Young modulus (GPa) 130 90 206 206 618 Poisson ratio 0,3 0,25 0,3 0,3 0,2 Flexural strength (3 points) (MPa) 210 143 1270 1960 1960 Fracture toughness (MPa*m1/2) 1,2 0,69 *4) 7 120 12 Vickers hardness (HV) 826 *3) 680 1350 800 1650 1) Material for Mitutoyo Products 2) Value at 20°C 3) Claimed value by the material supplier 4) Value measured by the material supplier (reference) 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. 353
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