Motorized bogie for OS-Railway - fully 3D-printable railway system

thingiverse

This is a fresh take on the motorized bogie for the Hectorrail 141. I've decided to publish it as a separate page because this bogie can be used to create custom locomotives. The main difference from the original version is that the main frame has been divided to make assembly much easier, and the connecting shaft and wheel shafts are both 3mm in diameter. The frame also provides space for ball bearings of the same size (6mm OD, 3mm ID, 2.5mm T) that are used for the wheels. However, the frame is designed so that you don't have to install the ball bearings. Because of the printing process, you might need to drill a hole for this shaft slightly larger than usual, as there are several edges that require enough clearance. This page includes two motor mounts: one for 16mm motors and gearboxes with long shafts (Maxon DCX16 with GPX16), and one for motor+gearbox with short shaft. The motor mount slides onto the main frame, and you will likely need to use a significant amount of force to get it into position. However, this design ensures that it will sit much tighter than the old version, without any screws obstructing the drive gears. Instead, the locking plate is secured with four M2x10-12 screws. Hardware needed: Ballbearings: 6mm OD, 3mm ID, 2.5mm thickness Connecting shaft: 3mm thick, 39-40mm long Wheel shafts: 3mm thick, 44mm long (two per bogie) Distance between inner sides of wheels: 28mm Screws holding center hub: M3x18 (two per bogie) Screw holding bogie to locomotive: M3x20 The dimensions listed are only a starting point. Due to the small size of the gears, you will need to adjust their positions depending on your print settings and obtained quality. Install the motor last, so that you can test how easily the wheels turn. If they snag, the gears are too tight; if one shaft remains still while turning the other, the gears are too loose and skip. Adjust them until they function as desired. Don't expect the positions in the STEP-file to work perfectly for your print. The step file is included for those who prefer to modify the system. The package includes two wheels with slots for O-rings, designed for the driving bogie, as well as a flat wheel that can be used to build the same bogie without any gears or motor mount and use it as the non-motorized bogie. Link to the Hectorrail 141 locomotive: https://www.thingiverse.com/thing:2575667 More related designs: https://www.thingiverse.com/groups/os-railway/things These new files will also be uploaded to the Hectorrail 141.