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

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

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

Its open design allows easy lubrication with grease or oil, while the double-row construction provides 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 industrial machinery like gearboxes or presses where precision and durability are key.

Weighing 30.5kg, 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 4952 B/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 Cylindrical
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Bore Dia 260 mm
  • Bore Dia Tolerance -0.018mm to 0
  • 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.) 2.1 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 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4952 B/SPW33 Bearing

NNU 4952 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 168300 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 2000 rpm, it balances durability and efficiency in high-performance settings.

NNU 4952 B/SPW33 Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for flexible lubrication options, either grease or oil, to suit different operational needs.

The precise chamfer dimensions and permissible axial displacement of 4.5 mm ensure easy installation.
This bearing is ideal for applications requiring high precision and long service life.

Application

Industrial Uses of NNU 4952 B/SPW33 Bearing
NNU 4952 B/SPW33 Bearing is commonly used in heavy industrial machinery, such as large lathes and rolling mills, 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.

Where Is NNU 4952 B/SPW33 Bearing Used?
In wind turbines, NNU 4952 B/SPW33 Bearing supports the main shaft, providing stability under high dynamic loads. Its chrome steel construction ensures durability even in harsh outdoor environments.

Optimized for Performance: NNU 4952 B/SPW33 Bearing
For paper manufacturing equipment, NNU 4952 B/SPW33 Bearing’s high radial load capacity makes it ideal for rollers and drying cylinders. The grease or oil lubrication options adapt to different operational needs.

Automotive vs Aerospace: Applications of NNU 4952 B/SPW33 Bearing
In automotive testing rigs, NNU 4952 B/SPW33 Bearing ensures precise alignment under heavy loads. Meanwhile, in aerospace ground support equipment, its high-speed capability and temperature resistance are key advantages.

Essential Roles of NNU 4952 B/SPW33 Bearing
NNU 4952 B/SPW33 Bearing is vital in steel production lines, where it supports conveyor systems handling molten metal. The wide temperature range ensures reliable performance from -30°C to 110°C.

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