Standard End Supports 1PCS BK10, 1PCS BF10 for CNC Machine Parts SFU1204 Ball Screw

These are shipped with a well documented flaw in the BK10 block where there is no spacer between the outer race between the two bearings, which means it is not possible to create proper preload between the bearings. In this case the issue is worse because there is about 1mm of axial play left when the two bearings are supposed to be constrained axially, even with the clamping flange tightened all the way down. To use these at all you will need to manufacture a simple spacer. I have no idea how these could be manufactured and sold with such a glaring mistake. The BF10 has no shoulder and the bearing is simply press fit into the housing. Both have simple deep groove 6001 bearings which is expected at this price. I was surprised that both parts are made from steel and not aluminum.