Inner Rings,IR,LR,IRT,LRB bearing

Inner Rings,IR,LR,IRT,LRB bearing

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China excellent quality IR/LR series inner rings

Inner ring is precisely processed by GCr15 chrome steel, are mainly used in the condition that the shaft can not be directly used as the rolling road. In order to achieve the purpose of auxiliary installation,standard inner ring are processed according to the P0 dimensional tolerances and geometric accuracy.

When a shaft cannot be ground and hardened as a seal counterface or where a replaceable seal counterface is required,needle roller bearing inner rings with nondirectionally ground race way (designation IR) can be used.

IR series inner rings : 1,are hardened and ground ,have a precision ground raceway surface with a lead-in chamfer on both sides, the chamfers facilitate assembly and protect the seal lips from damage during the mounting process 3, are available in some sides with a lubrication hole. Inner rings with additional lubrication holes are available on request.

IR inner ring (ring) after heat treatment and precision machining, dimensional tolerance and geometric accuracy in line with national standards, the inner ring raceway generally has guide chamfering at both ends for easy installation.It is suitable for the shaft can not be heat treated, can not be directly used as raceway.Normal working clearance is achieved when the inner ring is used in conjunction with needle roller bearings without inner ring.

LR series inner rings1,are hardened ,and the bore and the raceway diameter are ground 2, side face are turned and the edges are smoothed 3, can be used to provide a cost-effective bearing arrangment for applications where the large run-out width tolerance are less important 

The tolerance  of LR inner ring (ring) is greater than that of IR inner ring, the end face is not grinded, and the price is lower. It is often used with drawn cup needle roller bearings.

Main characteristics:

1,High hardness,large rigidity

2,Various specifications,easy to choose 

3,Big range of size

Material: GCr15 chrome steel

Process : Lathing Grinding

Heat treatment: Quenching 



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