Machine tool spindle bearings Agular contact ball bearings High degree of running accuracy ... , 7000,7200, 7300, 71800 series(4) structure:AC, C, B , with contact angle 25,15,40 degree, brass cage or nylon ... /Outer wooden case(2) For OD above 250 mm: Wrapped with water-proof belt then put in wooden case4. delivery time ...