Bearing block

thingiverse

It would probably be a good idea to make the outer diameter of the torus bigger as the material on the outside of the holding bolts is very thin. This can easily be done by editing the SCAD file, but I haven't gotten around to it yet. UPDATE 02/04/2017: Eight millimeter STL for complete assembly has been uploaded and the SCAD file updated to reduce counterbore and increase depth of holes that bolts go through to reduce "wiggle". UPDATE 30/03/2017 2: The SCAD file has been refined to include a better mating surface for bearings. UPDATE 30/03/2017: Parameterized the model to work with other rod / bearing sizes (untested). The SCAD file has been flipped 180 degrees for printing in the correct orientation, but the STL files have not yet been altered. At the moment, the inner and outer radii of the torus do not scale properly, but they can be easily adjusted manually to change its thickness as desired. A bearing block for 633z bearings is used on an eight or nine millimeter rod with Makerbeam and three millimeter diameter bolts. Print two of bearing_mount and one of bearing_mount_tab for each bearing assembly at nine millimeters. The bearing_mount_8mm.stl file includes improvements made to the SCAD design. This design was created to replace linear bearings as the ones I was using on eight millimeter rod were terrible. The SCAD file can be adjusted for eight millimeter / nine millimeter rod etc. Tightening bolts increases preload and fits well when printed out, although you may need to adjust part diameter depending on your printer. Print Settings: Printer: DIY Rafts: Doesn't Matter Supports: No Resolution: 0.2 Infill: 20% Notes: Printed with three perimeters. Flip bearing mount tab 180 degrees so it prints properly as by default it is upside down. May redesign to reduce the arc by a degree or so to allow addition of a washer or similar to guarantee that bearing side cannot rub frame. In the meantime, slight sanding of surface where the bearing holes are may solve this issue.