陶瓷球轴承 氮化硅球 GBT 31703-2015.pdf

GB/T31703-20154规格及等级4.1球规格优先采用的氨化硅球公称直径D与相对应的英制尺寸参见表1，其余规格的氨化硅球公称直径与用户协商确定。表1优先采用的氨化硅球公称直径球公称直径相应的英材球公称直径相应的英制球公称直径相应的英制D./mm尺寸/inD./mm尺寸/inD./mm尺寸/m0.3971/648.73111/3223.81215/160.5080.029.12823/6424.60631/320.6350.0259.5253/825.40010.7941/329.92225/6426.1941-1/321.1913/6410.31913/3226.9881-1/161.5881/1611.1127/1628.5751-1/81.9845/6411.50929/6430.1621-3/162.3813/3211.90615/3231.7501-1/42.7787/6412.30331/6433.3381-5/163.1751/812.7001/234.9251-3/83.5729/6413.49417/3236.5121-7/163.9695/3214.2889/1638.1001-1/24.36611/6415.08119/3239.6881-9/164.7623/1615.8755/841.2751-5/85.15913/6416.66921/3242.8621-11/165.5567/3217.46211/1644.4501-3/45.95315/6418.25623/3246.0381-13/166.3501/419.0503/447.6251-7/86.74717/6419.84425/3249.2121-15/167.1449/3220.63813/1650.8007.54119/6421.43127/3253.9752-1/87.9385/1622.2257/857.1502-1/48.33421/6423.01929/324.2材料等级氨化硅球根据弯曲强度、硬度、断裂韧性、压碎负荷比和微观结构分为I、三个等级。4.3球等级氨化硅球按外观、规值、球直径变动量、批直径变动量、球形误差及表面粗糙度分为3,5,10,16,20，24,28,40,60,100级别，精度依次由高到低。