Steel 210-5203 CAT40 to R8 Taper Adapter 4in Projection Toolholder

The Steel 210-5203 is a new CAT40-to-R8 taper adapter that allows Bridgeport-style R8 tooling to be used in CAT40 spindles on CNC machining centers, eliminating the need to maintain separate tooling inventories across machine types. The outside taper conforms to the ANSI V-flange CAT40 (7/24 taper, #40) standard with dual retention knob grooves and drive slots visible at the V-flange, while the inside bore accepts the R8 (Bridgeport) taper shank. The 4-inch projection dimension refers to the gauge-line-to-nose length, providing clearance for standard R8 collet chucks, end mill holders, and drill chucks. The body is finished in black oxide over alloy steel for corrosion resistance and is balanced for use on CNC machining centers. Label visible on the packaging confirms the designation CAT40-R8-4".

Product Specifications