The hollow axis adopts the cast steel and the lining can replace , the rotating big gear processes in the way of casting rolling gear.The barrel body is wearable well and bears wearable scaleboard.

• 中空轴采用铸钢件，内衬可拆换，回转大齿轮采用铸件滚齿加工，筒体内镶有耐磨衬板，具有良好的耐磨性。