Thelargerthesteelballis,thehardertogettheprecisiongrade.Ø76.2mm(3″) isthebiggestapplydiameterofsteelballbatchmanufacturemachine.Inthesteelballindustry,bigsteelballshavelowprecisiongrade.EventhenormalprecisiongradeofØ76.2mm.2mm(3″)EventhenormalprecisiongradeofØ76.2mm
حال ہی میں، KaifengBellStainlessSteelBallManufactureCo، لمیٹڈ (BellSTEELBALL) madebatchtrialproductionofØ76.2mmbigsizehighprecisionchromesteelballsandsuccessfullyextendthehighestprecisiongradeofourØ76.2mmlargesizechromesteelballtoG28.Thespecificationsincludevariationofballdiameter، deviationfromsphericalform، surfaceroughness، hardnessandsoontotallysatisfytherequirementsofISO3290-1: 2008، جیبی / T308.1-2013، ANSI / ABMAStd.10A، DIN5401، JISB1501، ГООТ3722، KSB2001andotherinternationalsteelballstandards.
