Needle roller bearings · Needle roller bearing components IR 6x10x10 IS1 · 7 · 10 · 10.5 · IR 7x10x10.5 IR 10x14x12 IS1 · 10 · 14 · 20 · IR 10x14x20.
IR 20×25×18 D. Type code. Dimension code. Suffix. Fig. 1. Inner Rings. NTN. Inner Rings. Many of the needle roller bearings use a shaft as the direct raceway
IR Series - Inner Rings with metric dimensions. They are made from hardened steel and are precision ground for use with precision needle bearings.
In inner rings IR, the raceway is precision machined. Chamfers on the end faces allow easy insertion into the bearings and prevent damage to the seal lips of the