I made this for the drawers at home. They have had significant damage to the wood where the screws have been replaced over the last 50 years, so I just wanted something to keep them from falling out of the cabinets. 

The roller wheel has a lip on one side to align the bearing so that the wheel shares a center line with the bolt holes. The wheels each use one bearing from POM wheels. 

The nuts in the bracket are #6x32. 1" machine screws work great for running through the washer plate into the bracket. The wheel bolt can be shorter, but won't suffer from the same length. I chose to use countersunk screws to keep the wheel centered without extra bushings.

Previous versions are shown. The single-piece, hooked bracket didn't allow the drawer to be installed into the cabinet, and the two-piece separated after 4 days of use (not to mention it was much heavier). The design uses the original mounting holes, but drilled out so they don't rely on the wood to keep them in place.