High precision Zirconia valve balls

Grades and size: Standard sizes range from 0.125" to 3.0" and smaller and larger sizes can be custom-made to your specifications. Refer to our Ball Grade table for the exact tolerances available. Ball Grade table: GradeDIA. tolerancedws) <μmSpherical tolerance(Sph) <μmSurface Roughness(Ra) <μmG3 0.08 0.08 0.012 G5 0.13 0.13 0.02 G10 0.25 0.25 0.025 G16 0.4 0.4 0.032 G20 0.5 0.5 0.04 G28 0.7 0.7 0.05 G40 1 1 0.08 G60 1.5 1.5 0.1 G1002.52.50.125G200550.2 Sizes available: Size (inch) Size (mm) Size (inch) Size (mm) 1/16 ‘’ 1.588 3/32 ‘’ 2.381 1/8 ‘’ 3.175 5/32‘’ 3.969 3/16 ‘’ 4.763 7/32‘’ 5.556 1/4 ‘’ 6.35 9/32 ‘’ 7.144 5/16‘’ 7.938 11/32 ‘’ 8.731 3/8 ‘’ 9.525 13/32 ‘’ 10.319 7/16‘’ 11.112 15/32‘’ 11.906 1/2 ‘’ 12.7 17/32‘’ 13.494 9/16‘’ 14.288 19/32‘’ 15.081 5/8‘’ 15.875 21/32‘’ 16.669 11/16 ‘’ 17.463 23/32‘’ 18.256 3/4 ‘’ 19.05 25/32‘’ 19.844 13/16 ‘’ 20.638 7/8 ‘’ 22.225 15/16 ‘’ 23.812 1‘’ 25.4 Material properties: Material properties: PropertyTypical ValuesZrO2 [ % ]95 Density [g/cm3] 6.0 Hardness [Kg/mm2] >1250 Elastic Modulus [Gpa] 210 Thermal Conductivity [W/m.k] 3 [20 to 400°C] Thermal Expansion Coefficient [10-6K-1] 9-11 Compressive Strength [MPa] 3000 Fracture Toughness [Mpa.m0.5] 8-10 Max. Useful Temperature [°C] 800