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Double Row Super-Precision Cylindrical Roller Bearings NNU 4984 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4984 B/SPW33

The NNU 4984 B/SPW33 is a double-row cylindrical roller bearing with a large 420mm bore and 560mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 339,750 lbf and runs smoothly at speeds up to 1000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction provides extra stability under heavy loads. 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 and precision are required.

Weighing 99kg, it’s a robust component designed for demanding applications. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NNU 4984 B/SPW33
  • Size 420 mm x 560 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 420 mm
  • Bore Dia Tolerance -0.028mm to 0
  • Outer Dia 560 mm
  • Outer Dia Tolerance -0.028mm to 0
  • Width 140 mm
  • Width Tolerance -0.45mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 4 mm
  • Permissible Axial Displacement(max.) 5.5 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 339750 lbf
  • Static Radial Load 900000 lbf
  • Max Speed 1000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 99 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
  • Shoulder Dia Outer Ring 510.5 mm
  • Raceway Diameter Inner Ring 466 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4984 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4984 B/SPW33 Bearing

NNU 4984 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 339750 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 1000 rpm, it balances durability and efficiency in demanding conditions.

NNU 4984 B/SPW33 Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, extending maintenance intervals.

The precise tolerances and chamfered edges ensure easy installation and alignment.
This bearing is ideal for applications requiring high precision and long service life.

Application

Industrial Uses of NNU 4984 B/SPW33 Bearing
NNU 4984 B/SPW33 Bearing is commonly used in heavy industrial machinery, such as large gearboxes and rolling mills, where its double-row design handles high radial loads efficiently. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

Where Is NNU 4984 B/SPW33 Bearing Used?
In wind turbine systems, NNU 4984 B/SPW33 Bearing supports the main shaft, providing stability under combined loads. Its chrome steel construction ensures durability even in harsh outdoor environments.

Built for Heavy-Duty Use: NNU 4984 B/SPW33 Bearing
This bearing excels in paper manufacturing equipment, where its high static radial load capacity keeps production lines running smoothly. The metric dimensions make it a reliable choice for European and Asian machinery standards.

Automotive vs Aerospace: Applications of NNU 4984 B/SPW33 Bearing
In automotive testing rigs, NNU 4984 B/SPW33 Bearing handles precise load simulations, while in aerospace, it supports landing gear mechanisms. Its temperature range suits both ground and high-altitude operations.

Key Fields for NNU 4984 B/SPW33 Bearing
NNU 4984 B/SPW33 Bearing is ideal for marine propulsion systems, where its grease lubrication option reduces maintenance needs. The large bore diameter accommodates heavy shafts commonly found in ship engines.

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