Martin's MXT® bushings are available from stock to fit all popular pulley sizes. Martin stocks MXT® bushings in a wide range of bore sizes per hub. The MXT® bushing offers a 2 in/ft taper, which reduces end disc pre-stressing, as well as increasing clamping force. All bushings size 50 and larger feature full depth keys. Martin MXT® Conveyor Bushing, 8-1/2 in Bore Dia, 13.688 in Barrel Dia, 17-15/16 in Hub Dia, 15-9/16 in Bolt Circle, 1-5/8 in Flange Thickness, 6 Bolt Holes, 1-1/8 x 3-1/2 in Screw, For Use With: MXTH-100 XT Hub, 6-1/4 in Overall Length, 2 x 3/4 in Keyway, Cast Iron