[Al Skierkiewicz]

Without seeing your device up close, I would think it would be OK. There is always a source of trouble in this setup with implementation. The pillow blocks work well for slightly misaligned shafts but the torque on the wheels and the sprocket tend to try and drive the blocks out of alignment. The surface to which they are mounted and the mounting hardware must be sturdy enough to prevent movement of the assembly. If the blocks move, the chain will loosen, the wheels will not run true or they may even begin to drag on the robot body. You are using the big shaft right? I don't think you will be able to bend that without doing some harm to other parts of the drive.