... .Anti-friction,Dustproof,Low backlash 2.Easy installation 3.C5 class 4.good service Precision ballscrew End support unit EK,EF ... types:AK,AF,BK,BF,EK,EF,FK,FF...As a professional ball screw support units manufacturer with many year’s ... bearing stiffness is greater than conventional bearings. These bearings have a 60 contact angle so that radial and thrust load combination ...