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Double Row Super-Precision Cylindrical Roller Bearings NNU 4952 BK/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4952 BK/SPW33

The NNU 4952 BK/SPW33 is a double-row cylindrical roller bearing with a 260mm bore and 360mm outer diameter, designed for combined loads. Made from durable chrome steel, it handles radial loads up to 168300 lbf and operates smoothly at speeds up to 2000 RPM.

Its open design allows easy lubrication with grease or oil, while the tapered bore ensures secure fitting. The bearing can handle axial displacement up to 4.5mm, making it versatile for various applications.

This model is interchangeable with SKF bearings, offering a reliable replacement option. Ideal for heavy machinery, gearboxes, or industrial equipment where precision and durability are key.

Weighing 30.5kg, it’s built to last in temperatures from -30°C to 110°C. Compliant with RoHS and REACH standards for safe and eco-friendly use.

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Product Parameters

  • Part Number NNU 4952 BK/SPW33
  • Size 260 mm x 360 mm x 100 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 260 mm
  • Bore Dia Tolerance 0 to +0.035mm
  • Outer Dia 360 mm
  • Outer Dia Tolerance -0.020mm to 0
  • Width 100 mm
  • Width Tolerance -0.35mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 2.1 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 1.1 mm
  • Permissible Axial Displacement(max.) 4.5 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 168300 lbf
  • Static Radial Load 382500 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 30.5 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 13.9 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 325.6 mm
  • Raceway Diameter Inner Ring 292 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4952 BK/SPW33 dimension drawing
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Features

Performance Features of NNU 4952 BK/SPW33 Bearing

NNU 4952 BK/SPW33 Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 168300 lbf, making it suitable for heavy-duty applications.

The double-row cylindrical design ensures stability and precision in high-speed operations.
With a maximum speed of 2000 rpm, it balances performance and durability.

NNU 4952 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 simplifies installation and ensures secure fitting.
This feature enhances the bearing’s reliability in demanding industrial environments.

Application

Industrial Uses of NNU 4952 BK/SPW33 Bearing
NNU 4952 BK/SPW33 Bearing is commonly used in heavy machinery like rolling mills and gearboxes, where its double-row design handles combined radial and axial loads efficiently. The tapered bore ensures a secure fit, reducing slippage during high-speed operations.

Where Is NNU 4952 BK/SPW33 Bearing Used?
In wind turbines, NNU 4952 BK/SPW33 Bearing supports the main shaft, thanks to its high dynamic radial load capacity. Its open design allows for easy lubrication, extending service life in harsh environments.

Built for Heavy-Duty Use: NNU 4952 BK/SPW33 Bearing
NNU 4952 BK/SPW33 Bearing excels in paper manufacturing equipment, where its chrome steel construction resists wear under constant stress. The grease or oil lubrication options make it adaptable to different operating conditions.

Automotive vs Aerospace: Applications of NNU 4952 BK/SPW33 Bearing
In automotive applications, NNU 4952 BK/SPW33 Bearing is found in large truck transmissions, providing reliable performance under heavy loads. For aerospace, its precision and speed tolerance make it suitable for auxiliary power units.

Key Fields for NNU 4952 BK/SPW33 Bearing
NNU 4952 BK/SPW33 Bearing is ideal for machine tool spindles, where its high rigidity and accuracy ensure smooth machining operations. The wide temperature range also makes it suitable for varied industrial environments.

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