If you’re working on machinery that uses Koyo inch-series drawn cup needle roller bearings, this IR-68 inner ring is a must-have replacement part. It’s made from hardened and ground steel, providing a durable raceway for needle rollers when the shaft itself can’t be used as one. With a 3/8” inner diameter, 9/16” outer diameter, and 1/2” width, it’s designed for a loose transition fit on the shaft, making installation straightforward. Ideal for applications in automotive transmissions, industrial equipment, agricultural machinery, and more – anywhere you need reliable, smooth rolling motion. This inner ring helps extend the life of your bearing setup and ensures consistent performance. Keep your equipment running smoothly with this genuine Koyo component.
