This component is a separate cylindrical inner ring designed for needle roller bearings with a separable configuration, allowing mounting and dismounting without disturbing the outer bearing assembly. It has a bore diameter of 40.0 mm, a width of 30.0 mm, and a net mass of 76.5 g. The cylindrical raceway surface provides a running track for the rolling elements when paired with the corresponding outer ring and needle roller and cage assembly. The separable design of this inner ring simplifies installation on the shaft, as it can be fitted independently before final assembly with the outer bearing components. Being a bare inner ring, it carries no integrated sealing or lubrication, so sealing arrangement and lubricant selection depend on the surrounding housing design and the specific full bearing set it is combined with.