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Double Row Super-Precision Cylindrical Roller Bearings NNU 4924 BK/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4924 BK/SPW33

The NNU 4924 BK/SPW33 is a double-row cylindrical roller bearing with a 120mm bore and 165mm outer diameter, crafted from durable chrome steel. It handles combined loads up to 39600 lbf and runs smoothly at speeds up to 5000 RPM.

Its open design allows for easy lubrication with grease or oil, while the tapered bore ensures a secure fit. The bearing operates reliably in temperatures from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a practical choice for replacements. Ideal for precision applications like machine tools or industrial gearboxes where high radial loads are present.

Weighing 2.8kg, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NNU 4924 BK/SPW33
  • Size 120 mm x 165 mm x 45 mm
  • Brand TFL
  • Interchangeable brand SKF
  • System of Measurement Metric
  • Roller Bearing Type Cylindrical
  • Bore Type Taper 1:12
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Bore Dia 120 mm
  • Bore Dia Tolerance 0 to +0.020mm
  • Outer Dia 165 mm
  • Outer Dia Tolerance -0.013mm to 0
  • Width 45 mm
  • Width Tolerance -0.20mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 1.1 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 0.6 mm
  • Permissible Axial Displacement(max.) 1.1 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 39600 lbf
  • Static Radial Load 76500 lbf
  • Max Speed 5000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 2.8 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 5.5 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 150.5 mm
  • Raceway Diameter Inner Ring 134.5 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4924 BK/SPW33 dimension drawing
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Features

Performance Features of NNU 4924 BK/SPW33 Bearing

NNU 4924 BK/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 39,600 lbf, ensuring reliable performance in demanding applications.

The double-row cylindrical design enhances stability and load distribution, reducing wear over time.
With a maximum speed of 5,000 rpm, it balances durability and efficiency in high-speed operations.

NNU 4924 BK/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 tapered bore design ensures secure fitting, minimising misalignment risks.
Precision engineering makes it suitable for applications requiring high accuracy and reliability.

Application

Industrial Uses of NNU 4924 BK/SPW33 Bearing
NNU 4924 BK/SPW33 Bearing is commonly used in heavy industrial machinery, such as gearboxes and large pumps, where its double-row design handles combined loads efficiently. The open seal type allows for easy lubrication, making it suitable for high-speed operations up to 5000 rpm.

What Makes NNU 4924 BK/SPW33 Bearing a Preferred Choice?
In precision machine tools, NNU 4924 BK/SPW33 Bearing provides excellent radial load capacity, ensuring smooth operation under demanding conditions. Its chrome steel construction offers durability, while the tapered bore simplifies installation and alignment.

Built for Heavy-Duty Use: NNU 4924 BK/SPW33 Bearing
NNU 4924 BK/SPW33 Bearing excels in applications like rolling mills and paper processing equipment, where its high static radial load rating of 76500 lbf is essential. The grease or oil lubrication options adapt to various operational environments.

Automotive vs Aerospace: Applications of NNU 4924 BK/SPW33 Bearing
In automotive systems, NNU 4924 BK/SPW33 Bearing supports components like drivetrains, offering reliable performance under combined loads. For aerospace, its precision and high-speed capabilities make it suitable for auxiliary power units and rotor systems.

Perfect Fit for Automation: NNU 4924 BK/SPW33 Bearing
NNU 4924 BK/SPW33 Bearing is ideal for robotic arms and automated production lines, where its low friction and high accuracy enhance performance. The metric dimensions ensure compatibility with a wide range of industrial equipment.

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