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Double Row Super-Precision Cylindrical Roller Bearings NNU 4926 BK/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4926 BK/SPW33

The NNU 4926 BK/SPW33 is a double-row cylindrical roller bearing with a 130mm bore and 180mm outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 42075 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 3.85kg, 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 4926 BK/SPW33
  • Size 130 mm x 180 mm x 50 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 130 mm
  • Bore Dia Tolerance 0 to +0.025mm
  • Outer Dia 180 mm
  • Outer Dia Tolerance -0.015mm to 0
  • Width 50 mm
  • Width Tolerance -0.25mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 1.5 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 1 mm
  • Permissible Axial Displacement(max.) 2.2 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 42075 lbf
  • Static Radial Load 87750 lbf
  • Max Speed 5000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 3.85 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 5.5 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 162 mm
  • Raceway Diameter Inner Ring 146 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4926 BK/SPW33 dimension drawing
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Features

Performance Features of NNU 4926 BK/SPW33 Bearing

NNU 4926 BK/SPW33 Bearing is designed with double-row cylindrical rollers, providing excellent load capacity for combined radial and axial loads.
Its chrome steel construction ensures durability and resistance to wear in demanding applications.

The bearing’s dynamic radial load capacity reaches 42,075 lbf, making it suitable for heavy-duty machinery.
With a maximum speed of 5,000 rpm, it maintains reliable performance under high-speed conditions.

NNU 4926 BK/SPW33 Bearing operates efficiently in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, reducing maintenance needs.

The tapered bore design ensures secure fitting and alignment, enhancing operational stability.
Precision engineering minimises friction, contributing to smoother and quieter performance.

Application

Industrial Uses of NNU 4926 BK/SPW33 Bearing
NNU 4926 BK/SPW33 Bearing is commonly used in heavy industrial machinery, such as large lathes and milling machines, where its double-row design handles combined radial and axial loads efficiently. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

What Makes NNU 4926 BK/SPW33 Bearing a Preferred Choice?
In automotive manufacturing, NNU 4926 BK/SPW33 Bearing supports high-precision applications like gearbox assemblies, thanks to its tapered bore for secure fitting. Its chrome steel construction ensures durability even under continuous high-speed operation.

Built for Heavy-Duty Use: NNU 4926 BK/SPW33 Bearing
For automation systems, NNU 4926 BK/SPW33 Bearing is ideal for robotic arms and CNC machines, where its high dynamic load capacity ensures smooth movement. The grease or oil lubrication options provide flexibility for different operational environments.

Medical vs Industrial: Where NNU 4926 BK/SPW33 Bearing Excels
In medical imaging devices, NNU 4926 BK/SPW33 Bearing offers reliable performance due to its precision engineering and minimal axial displacement. Industrial applications benefit from its robust design, capable of withstanding heavy loads in harsh conditions.

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