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Double Row Super-Precision Cylindrical Roller Bearings NNU 4980 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4980 B/SPW33

The NNU 4980 B/SPW33 is a double-row cylindrical roller bearing with a 400mm bore and 540mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 330,750 lbf and runs smoothly at speeds up to 2000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction provides extra stability. The bearing operates well in temperatures 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 high radial loads are common.

Weighing 88kg, it’s built for durability in demanding applications. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NNU 4980 B/SPW33
  • Size 400 mm x 540 mm x 140 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 400 mm
  • Bore Dia Tolerance -0.023mm to 0
  • Outer Dia 540 mm
  • Outer Dia Tolerance -0.028mm to 0
  • Width 140 mm
  • Width Tolerance -0.40mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 4 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 4 mm
  • Permissible Axial Displacement(max.) 5.5 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 330750 lbf
  • Static Radial Load 855000 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 88 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
  • Shoulder Dia Outer Ring 490.8 mm
  • Raceway Diameter Inner Ring 446 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4980 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4980 B/SPW33 Bearing

NNU 4980 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 330750 lbf, ensuring reliable performance in heavy-duty applications.

The double-row 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 4980 B/SPW33 Bearing operates smoothly within a temperature range of -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, simplifying maintenance.

The precise tolerances and chamfer dimensions ensure seamless integration into machinery.
This bearing is ideal for applications requiring high precision and long service life.

Application

Industrial Uses of NNU 4980 B/SPW33 Bearing
NNU 4980 B/SPW33 Bearing is commonly used in heavy industrial machinery like rolling mills and large gearboxes, where its double-row design handles high radial loads with ease. The open seal type allows for efficient lubrication, ensuring long service life even in demanding conditions.

What Makes NNU 4980 B/SPW33 Bearing a Preferred Choice?
With its chrome steel construction, NNU 4980 B/SPW33 Bearing offers reliable performance in applications such as wind turbine gearboxes and mining equipment. The generous temperature range makes it suitable for both hot and cold environments.

Built for Heavy-Duty Use: NNU 4980 B/SPW33 Bearing
In automotive manufacturing, NNU 4980 B/SPW33 Bearing supports large presses and robotic assembly lines, where precision and durability are key. Its high dynamic load capacity ensures smooth operation under continuous use.

Automotive vs Aerospace: Applications of NNU 4980 B/SPW33 Bearing
While NNU 4980 B/SPW33 Bearing excels in automotive applications like heavy-duty transmissions, it also finds use in aerospace landing gear systems. The combined load capability makes it versatile across industries.

Where Is NNU 4980 B/SPW33 Bearing Used?
You’ll often find NNU 4980 B/SPW33 Bearing in paper mill machinery, where its high-speed capability and grease lubrication options reduce maintenance needs. The wide tolerance range also accommodates slight misalignments.

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