This is a Y-Axis Motor Mount for a Mendlemax Printer.I didn't like the way the y-axis motor was torqued out of alignment by the Y-axis belt tension. This design addresses that problem. The photo shows the two versions. I was able to swap out the mount by removing the two 5mm screws from the frame without any other disassembly. My belt pulley slides through the hole in the frame. If you have a larger pulley you’ll need a larger hole or remove the pulley from the stepping motor.