The Virtual Machine Shop

Reaming guide

The same item is also called a tapping guide and is used the same way. The guide is used to keep the hand reamer aligned with the hole being reamed. It has a spring-loaded point that fits the dimple on the exact center and back end of the hand reamer. The other end fits in the chuck of the drill press that was used to drill the pilot hole (it is important that the work piece has not been moved since hole drilling so that the center of the drill press spindle is aligned with the drilled hole). A small amount of downward pressure is applied by the drill press quill against the spring load of the point. The quill is then locked in place. Hand reaming can now take place with assurance that the reamer is on the same centerline as was the pilot drill and will stay that way during the reaming process.