Roller bearing assembly for shave tool holder

In a shave tool holder having a first section adapted to be mounted at one end thereof on a machine cross slide for movement thereby, and a second, tool bit supporting section slidably mounted at one end thereof on, and in confronting relation to, the opposite end of said first section for reciprocation relative thereto in a predetermined path, a roller bearing assembly interposed between the confronting ends of said sections and comprising,

• a generally trapezoidally-shaped projection on one of said confronting ends of said sections projecting slidably into a registering recess in the other confronting end of said sections, and having opposite sides thereof disposed in spaced, confronting relation to opposite sides of said registering recess,
• said projection having therethrough a pair of spaced, parallel bores located adjacent and parallel to said opposite sides thereof, and opening on opposite ends thereof to form portions of two different endless roller bearing raceways in said projection,
• said projection having in each of said opposite sides thereof a groove which extends between said opposite ends of said projection parallel to said bores, and which confronts upon a registering groove formed in the confronting side of said recess, each set of said registering grooves cooperating with one of said bores in said projection to define a further portion of one of said two raceways,
• a pair of bearing caps secured over said opposite ends, respectively, of said projection, each of said caps having therein a pair of arcuate recesses each of which registers at opposite ends thereof with one end of one of said bores and with one end of one of said sets of registering grooves, thereby to complete the formation of said two endless raceways, and
• two sets of ball bearings, each of said sets being mounted for endless travel in a respective one of said raceways.