SAWTRAX Sealed Roller Bearing Upgrade Sealed Bearing System for panel saw. This bearing system give you an incredible smooth and light feel moving the saw up and down on the guide rails. We have cut a hole in the bottom of the carriage and bolted on a third bearing. Now you can use the bearing system we had for the horizontal tables, with an extra third bearing under the carriage, and use it for our vertical panel saws. Seeing is believing.