IKO LRB121612 Inch Needle Roller Bearing Inner Ring, 3/4 x 1 in, 19.3 mm Wide

This page covers 35 IKO inch series inner rings for general usage, made for BR needle roller bearings, 3/8 to 3 1/2 in bore. Choose the size from the drop-downs (outside diameter F (in inches) and width B); each variant has its own dimensions, mass and assembled bearings in the Model Details.

An inner ring (inner race) is the hardened, ground raceway that the needle rollers run on. Needle roller bearings normally run directly on a heat treated, ground shaft; where the shaft cannot be made to the specified surface hardness or roughness, an inner ring is used instead. IKO inner rings are heat treated and finished by grinding to a high degree of accuracy.

Rings are matched to BR needle roller bearings. Every LRB ring has an oil groove with one oil hole (bore 76.2 mm or less) or two oil holes (bore over 76.2 mm). Sizes are given in mm, with the inch size in brackets.

Where this product is used

• Shaft raceway for a needle roller bearing where the shaft cannot be heat treated and ground to the specified surface hardness and roughness
• Matching inner ring for the assembled bearings listed against each size in the Model Details
• Shafts that move axially, or that run next to a seal, where a wide inner ring is needed
• A bush on a shaft with no further machining

Features

• Heat treated and finished by grinding to a high degree of accuracy
• Bore 9.525 to 88.9 mm, outside diameter 15.875 to 101.6 mm and width 19.3 to 51.05 mm across 35 sizes
• Oil groove with one oil hole (bore 76.2 mm or less) or two oil holes (bore over 76.2 mm)
• Can be used as a bush on a shaft with no further machining

Key specifications

Available sizes

Mass is a reference value. ras max is the maximum allowable fillet corner radius of the shaft.

Selecting the right option

The drop-downs are outside diameter (F, in inches) and width (B, mm); the ring bore d is in the Model Details. For example, LRB121612 has a 19.05 mm (3/4 in) bore and a 25.4 mm (1 in) outside diameter.

Sizes are given in mm, with the inch size in brackets.

Fitting and use

Check the outside diameter F (the raceway size), the width B and the bore d in the Model Details against your shaft and the mating bearing. Mass is a reference value.

ras max is the maximum allowable fillet corner radius of the shaft, and da is the standard mounting dimension (minimum and maximum) shown in the Model Details.

Match the ring to the bearings shown for it in the Model Details: each ring size is matched to specific bearing part numbers. If you are unsure, send AIMS the part numbers or sizes and we will confirm the fit.

Related products

Rings are matched to BR inch series machined type needle roller bearings without inner ring.