Product information "Pololu Machined Aluminum Bracket for 37D mm Metal Gearmotors"
This light and sturdy bracket is specifically designed for Pololu’s 37D mm metal gearmotors. Nine 8 mm M3 screws are included for securing the motor to the bracket and the bracket to a surface. The bracket features three tapped M3 holes along the bottom (spaced 14.8 mm, or 0.58″, apart) that are used to mount it to another object.
We also carry a stamped L-bracket for our 37D mm gearmotors that provides alternate mounting options, but the stamped bracket is not quite as sturdy as this machined bracket and can bend under heavy load
Dimensions of Pololu machined aluminum bracket for 37D mm metal gearmotors (mm over [in]).