High-Performance NSK Cylindrical Roller Bearing NU309EWC3

Description

The NSK NU309EWC3 is a premium single-row cylindrical roller bearing engineered for superior performance in demanding industrial environments. This bearing is designed to accommodate high radial loads at high speeds. The 'NU' design features two flanges on the outer ring and a flangeless inner ring, allowing for axial displacement of the shaft relative to the housing. The 'E' suffix indicates an enhanced internal design for higher load capacity, while 'W' signifies a durable pressed steel cage, and 'C3' denotes a radial internal clearance greater than normal, making it suitable for applications with temperature variations or high-speed rotations.

Specifications

• Manufacturer: NSK
• Type: NU309EWC3
• Product Type: Cylindrical Roller Bearing
• Bore Diameter (d): 45 mm
• Outer Diameter (D): 100 mm
• Width (B): 25 mm
• Cage Type: Pressed Steel (W)
• Internal Clearance: C3 (Greater than Normal)
• Internal Design: Optimized for high capacity (E)

Label Info

• Brand: NSK
• Model: NU309EWC3
• Made in: Japan

Application

This bearing is ideal for a wide range of applications requiring high radial load support, including industrial gearboxes, pumps and compressors, electric motors, and mechanical presses.

Country of Origin

• Japan

CO2 Impact

By choosing this pre-owned but unused bearing, you are contributing to a circular economy and avoiding the emission of approximately 1.9 kg of CO2. This saving is comparable to the emissions from driving a car for 9.5 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

The C3 designation indicates that the bearing has a radial internal clearance that is greater than the 'Normal' (CN) standard. This extra clearance is essential in applications where thermal expansion of the shaft or housing might occur, or where a press fit is used, preventing the bearing from seizing under operating temperatures.

The NU design of this cylindrical roller bearing can accommodate some incidental axial load, but it is primarily designed for high radial loads. The inner ring can move axially relative to the outer ring, allowing for thermal expansion. If significant axial load support is required, an angular contact ball bearing or a different type of cylindrical roller bearing (like an NJ or NUP type) should be considered in combination.

The NU309EWC3 is typically supplied with a preservative oil and is not pre-greased. The choice of lubricant (oil or grease) and the relubrication interval depend heavily on the operating conditions, including speed, load, and temperature. Always consult the machine manufacturer's manual or an NSK lubrication guide to select the appropriate lubricant and establish a suitable maintenance schedule.

Last Update: Friday, March 13, 2026

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