Ball screw support type including the :BK+BF,EK+EF,FK+FF . ... spiral poles prepared the standard support unit BK, BF type. Fixed support units by the side with the adjustment of preloading ... contact ball bearing. Especially in EK6, 8 band mini type, meant for the mini bar ball spiral of development ... the deep groove ball bearing. Support unit EK, BK type of internal bearing load in the right amount of ...