Rexnord 30HSB-1-1/2-STL Straight Bore Hub

Rexnord Omega ES-R Series Straight Stock Bore hub, 30 HSB, steel, provides a precise 1.500 in bore for Rexnord Omega coupling assemblies and is designed to serve as the mounting hub between driver and driven shafts in ES-R style elastomeric couplings. The hub features an outside diameter of 4.62 in, a hub length of 2.31 in, and a straight bore with a keyway that is 1/2 in wide by 1/4 in deep to align and secure the coupling element on the shaft. Boring is performed to AGMA 9002 Class 1 clearance fit to maintain consistent mounting tolerances across typical industrial drives, supporting reliable alignment and repeatable performance. Catalog part number 7300661 corresponds to this 30-coupling-size straight bore hub within the Rexnord ES-R family, and the steel construction provides the strength needed for demanding power-transmission tasks that require a robust shaft-hub interface for a 1.5 in bore.