This probably looks complex and expensive to do, but it's as easy as routing the right size groove and mounting some salvaged rollers. The grove needs to match the roller in width and depth and is located near the top of the side panels. Two rollers are fastened to the side edges of the door at the top so that they can turn freely. Two more rollers are mounted inside the cabinet just below the groove and the same thickness as the door away from the front.
I salvaged the rollers from a used set of low cost drawer slides and used regular flat head wood screws as axles and washers as spacers.
This is an excerpt from a longer build video on making a modern office cabinet:
https://ibuildit.ca/projects/makinga...

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