R8 to 4JT Drill Chuck Arbor R8 Shank to Jacobs Taper JT4 Adapter New ^[
MOUNTING SIZE 4JT. Taper R8 to Jacobs Taper #4(4JT). Long end is R8 short end is 4JT. Arbor will fit all drill chucks that with a 4JT bore and will fit on any machine tool with a R8 spindle. Taper: JT4.