Replacement bearing mounts for the original aluminium bearing blocks used by most printers. They didn't have the right OD for my new 8mm polymer bushings (16mm), so I modelled these up.
Printed in PLA they work well with my bushings, and can be used with normal linear ball bearings as well so long as they have an OD of 16mm.
Since most aluminium bearing blocks use M4 type screws, you will need to drill out the mounting holes to be 3.5mm and use an M4 tap in order to mount these blocks. I left the holes small so that if you wish to use smaller screws (M3) in order to mount these then you can.