# Ball screw end support A ball screw end support unit as one solid; the bearings aren't modelled. BK and BF stand with their foot on the XY plane and the screw along Y at height h. FK and FF have their flange face on the XY plane and the screw along Z. ## Source TBI Ball Screw Support Units, Anaheim Automation sheets: - BK: L011175, - BF: L011178, - FK: L011176, - FF: L011179, Bore, outer sizes, centre height, hole sizes, pitch P and PCD are the sheets'. The sheets state b and h as +/-0.02. **Proportions, for looks only:** the shaft-end collar's diameter, the height of the BK and BF wing holes (the sheet gives E between them, not where they sit), and where the block's four counterbored holes sit. The FK and FF bolt circle is the sheet's, set on the diagonals as drawn. Overall length is L + L1 here; the sheet's reference L2 is not modelled. The bore follows the sheet: BF10 has an 8 mm bore and BK10 a 10 mm bore, since the support side takes a smaller shaft end. BK8, BF8, FF8, FK17 and FF17 aren't in these tables, so they aren't offered.