Technical itemReference specification
MaterialStainless, chrome steel, ceramic, carbide, copper alloy, plastic or coated substrate
Diameter RangeDrawing-specific, from miniature check balls through large fabricated spheres
Precision GradeApplication-specific diameter, sphericity, port and datum tolerances
ToleranceControlled by the agreed precision grade, drawing or purchase specification
HardnessMaterial and coating dependent
DensityMaterial-grade dependent; confirm before quotation
Surface FinishGround, lapped, polished, coated or plated to agreed roughness and visual limits
Roundness / SphericityControlled according to the agreed precision grade and inspection method
Temperature ResistanceApplication, load, atmosphere and material-grade dependent
Chemical ResistanceConfirm exact fluid, concentration, temperature and exposure time
PackagingBulk, small-quantity, container, bag, carton, export pallet or customized packing
GeometrySolid, hollow, through-port, blind hole, slot, stem feature or custom design
Leakage factorsSeat material, sphericity, finish, contact band, pressure and contamination
InspectionDimensional report, roundness, roughness, coating and material checks by control plan
Drawing requirement2D drawing or 3D model with datums, tolerances and service conditions