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Double Row Super-Precision Cylindrical Roller Bearings NNU 4960 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4960 B/SPW33

The NNU 4960 B/SPW33 is a double-row cylindrical roller bearing with a 300mm bore and 420mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 229500 lbf and operates smoothly at speeds up to 2000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction provides added stability under heavy loads. The bearing performs reliably in temperatures ranging from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a practical choice for replacements. Ideal for heavy machinery or industrial equipment where precision and durability are key.

Weighing 50kg, it’s a robust component designed for long-term use. Compliant with RoHS and REACH standards for safe and eco-friendly operation.

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Product Parameters

  • Part Number NNU 4960 B/SPW33
  • Size 300 mm x 420 mm x 118 mm
  • Brand TFL
  • Interchangeable brand SKF
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • Bore Type Cylindrical
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Bore Dia 300 mm
  • Bore Dia Tolerance -0.018mm to 0
  • Outer Dia 420 mm
  • Outer Dia Tolerance -0.023mm to 0
  • Width 118 mm
  • Width Tolerance -0.35mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 3 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 3 mm
  • Permissible Axial Displacement(max.) 5.5 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 229500 lbf
  • Static Radial Load 531000 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 50 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 379 mm
  • Raceway Diameter Inner Ring 339 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4960 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4960 B/SPW33 Bearing

NNU 4960 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 229500 lbf, ensuring reliable performance in heavy-duty applications.

The double-row cylindrical design enhances stability and load distribution, reducing wear over time.
With a maximum speed of 2000 rpm, it balances durability and efficiency in demanding conditions.

NNU 4960 B/SPW33 Bearing operates smoothly within a temperature range of -30° to 110°C.
Its open design allows for flexible lubrication options, either grease or oil, to suit various operational needs.

The precise tolerances and chamfer dimensions ensure easy installation and alignment.
This makes NNU 4960 B/SPW33 Bearing a practical choice for high-precision industrial applications.

Application

Industrial Uses of NNU 4960 B/SPW33 Bearing
NNU 4960 B/SPW33 Bearing is commonly used in heavy machinery like rolling mills and large gearboxes, where its double-row design handles both radial and axial loads efficiently. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

Where Is NNU 4960 B/SPW33 Bearing Used?
You’ll find NNU 4960 B/SPW33 Bearing in wind turbines and industrial pumps, where its high dynamic radial load capacity keeps operations smooth. Its chrome steel construction also makes it resistant to wear in high-speed environments.

Built for Heavy-Duty Use: NNU 4960 B/SPW33 Bearing
NNU 4960 B/SPW33 Bearing excels in applications like paper mills and mining equipment, thanks to its robust design and high static radial load rating. The grease or oil lubrication options provide flexibility for different operating conditions.

Automotive vs Aerospace: Applications of NNU 4960 B/SPW33 Bearing
In automotive systems, NNU 4960 B/SPW33 Bearing supports large drivetrain components, while in aerospace, it’s used in landing gear mechanisms. Its combined load capability makes it versatile across industries.

Practical Applications of NNU 4960 B/SPW33 Bearing
NNU 4960 B/SPW33 Bearing is ideal for machine tools and printing presses, where precision and durability are key. The wide temperature range ensures reliable performance in various climates.

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