Meccano Motor Mount M3 17mm-Centres 2 x 6

3mm holes (M3 tight fit) at 17mm centres. 7mm central Motor bearing hole. Meccano 4mm (M4 tight fit) with 12.7mm centres 2x6 plate. 3mm thick.

Common dimensions for 6V/12V gear motors from Ali Express

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/c93RfpT0nAe