IKO IR20X25X20

IKO IR 20X25X20 Needle Roller Bearing Inner Ring

Description

The IKO IR 20X25X20 is a high-quality, precision-machined inner ring for needle roller bearings. It is designed to be used in applications where the shaft cannot be practically used as a raceway due to its hardness or surface finish. This inner ring provides an optimal, hardened, and ground surface to maximize the life and performance of the mating needle roller bearing.

Specifications

• Inner Diameter (d): 20 mm
• Outer Diameter (F): 25 mm
• Width (B): 20 mm
• Material: High Carbon Chrome Bearing Steel
• Type: Machined Inner Ring

Label Info

• Brand: IKO
• Part Number: IR 20X25X20
• Description on Label: NAALDLAGER BINNENRING (Dutch for Needle Bearing Inner Ring)

Application

This inner ring is commonly used in various industrial applications, including automotive transmissions, two-cycle engines, and industrial gearboxes, where a compact and high-load capacity bearing arrangement is required on an unhardened shaft.

Country of Origin

Japan

CO2 Impact

By purchasing this pre-owned component, you are contributing to a circular economy and have helped avoid approximately 0.06 kg of CO2 emissions associated with the production of a new part.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
What are the recommended shaft and housing tolerances for mounting the IR 20X25X20 inner ring?

For a stationary shaft load, a recommended shaft tolerance is j5 or k5. The housing bore for the needle bearing that runs on this ring depends on the specific bearing used, but generally falls within H7.

Question?
Is this inner ring pre-lubricated or does it require initial lubrication?

Inner rings are typically shipped with a corrosion-preventive coating, not a functional lubricant. It is essential to apply the appropriate grease or oil for your application upon installation, consistent with the lubrication of the main needle roller bearing.

Question?
Can this IKO inner ring be used with a needle roller bearing from a different manufacturer?

Yes, as long as the dimensions are standardized. This inner ring is designed to work with needle roller bearings that require an inner ring with a 20mm bore, 25mm raceway diameter, and accommodate a 20mm width. Always check the bearing manufacturer’s specifications for compatibility.

Last Update: Friday, March 13, 2026

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