NSK 51406

NSK 51406 Single Direction Thrust Ball Bearing

Description

The NSK 51406 is a high-precision single direction thrust ball bearing engineered for managing axial loads in one direction. Consisting of a shaft washer, a housing washer, and a ball and cage assembly, this bearing provides high stiffness and running accuracy. Its separable design simplifies mounting and dismounting procedures. Manufactured in Japan from premium bearing steel, it guarantees exceptional durability and performance for critical industrial machinery.

Specifications

• Manufacturer: NSK
• Part Number: 51406
• Type: Single Direction Thrust Ball Bearing
• Inner Diameter (d): 30 mm
• Outer Diameter (D): 60 mm
• Height (T): 19 mm
• Basic Dynamic Load Rating (Axial): 37.5 kN
• Basic Static Load Rating (Axial): 68 kN
• Limiting Speed (Grease): 3600 rpm
• Limiting Speed (Oil): 5300 rpm

Label Info

• Brand: NSK
• Model: 51406
• Origin: Japan

Application

This bearing is ideally suited for applications requiring high-accuracy axial load support, such as machine tool spindles, indexing tables, vertical shafts, and jacks.

Country of Origin

This product is manufactured by NSK Ltd. in Japan.

CO2 Impact

Choosing this surplus bearing over a new one avoids approximately 0.46 kg of CO2 emissions, contributing to a more sustainable industrial operation.

Availability

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

FAQ

What is the main application for a single direction thrust ball bearing like the NSK 51406?

This type of bearing is designed exclusively for axial (thrust) loads in one direction. It is ideal for applications like rotating tables, machine tool spindles, and automotive clutch mechanisms where precise axial positioning and load support are critical. It cannot accommodate any radial load.

Does the NSK 51406 require a specific type of lubrication?

Yes, proper lubrication is crucial. For the specified limiting speeds, it can be lubricated with either grease (up to 3600 rpm) or oil (up to 5300 rpm). The choice depends on the operating speed, temperature, and load of the specific application. Always use a high-quality bearing grease or oil compatible with the operating conditions.

How do I correctly mount the three separate parts of the 51406 bearing?

The NSK 51406 consists of a shaft washer, a housing washer, and the ball and cage assembly. The shaft washer has a slightly smaller bore and should be mounted with a tight fit on the shaft. The housing washer has a slightly larger bore and should be mounted with a loose fit in the housing. The ball and cage assembly is placed between them. It is critical not to mix up the washers, as incorrect installation will lead to premature failure.

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Last Update: Friday, March 13, 2026