[3Dsigns]

This is something I've wanted to do for a long time. Its the gantry I'm working on for a homebuilt router. The main extrusion is 3"x6" 80/20 aluminum, 60" long.

Questions

The milled piece on the end came from another CNC machine in a textile factory and is 3/4" thick aluminum alloy. Will it be strong enough to carry this gantry? If you can see it in the photo, it also has another piece of 1/4" plate mounted to the back, also attaching it to the 80/20 beam, so that should brace it very well laterally. The gantry will probably weigh close to 100 lbs with the stage, racks and motors installed and it's already heavy with the linear rails installed.

The thing that concerns me, is that the end is milled to hold only one bearing block. Is this enough? Or do I need two? Because I plan to use rack and pinions with servo motors ,instead of steppers, to drive it. Could the acceleration of this setup create too much G forces along the x axis, for one bearing block to handle?.

Thanks!