HPI Rush electric conversion - motor mount

thingiverse

I'm converting a HPI Rush R/C car to electric and needed a motor mount - nothing seems to exist so I designed this one. It mounts to the holes which carry the screws for the brake pads, and to one existing hole in the chassis. Designed for a standard 36mm diameter motor. It's a bit of a dirty hack in TinkerCAD because I'm very early in my journey doing 3D design, but it works and it fits well. The Mount_v5 fits the stock spur with slipper plate etc, like this: https://www.ebay.co.uk/itm/134169058665?hash=item1f3d195d69:g:5JwAAOSwz5ViysG8 However in this case, the dog drive hub will slide too far down the shaft and interfere with the motor mount, so I cut two short bits about 5mm long off a 2mm allen key and used those to pack out the grooves in the hub to give it a 5mm standoff from the dog drive. The Mount_v5_savage_spur fits an aftermarket dog drive spur/pinion set such as this: https://www.ebay.co.uk/itm/174775340298?hash=item28b16c0d0a:g:1YQAAOSwuKRgpmEo&amdata=enc%3AAQAHAAAA4IPUoN310QRE2O8q2MDGSkhyoiKTNh%2Fa0Aws32al3r6eX9zYYmS4zYvJ3KVrQXbmIwJzKoaBgMH27xJJ1J38pnYIVqYZ3nfUMggUoY9KqrzZPgbDJfzk3MXG0nYIMRtMNo1d%2Fg3%2FlAjVkjyqNTw3wjw11bGpafOuUMFJH6hWTprmS%2FFA7gXW%2BPXNaELxmwEHrfTSYgBaPEL0FYoDNWIlxInvPRl2%2FvODgBnovuriARR3O%2FmShuZVMNET%2BCb6gXm%2BB12S6zYq7yvwXFImQO5afr5A50N4kRGrhuZn%2FjaCJBf1%7Ctkp%3ABFBM9qeh5MRg The "savage" mount will require you to use shorter screws for mounting to the brake bosses - I used 6BA machine screws and they fitted fine.