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Double Row Super-Precision Cylindrical Roller Bearings NNU 4968 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4968 B/SPW33

The NNU 4968 B/SPW33 is a double-row cylindrical roller bearing with a 340mm bore and 460mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 247500 lbf and runs smoothly at speeds up to 2000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction provides extra stability. 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 are common.

Weighing 59kg, it’s a robust option for demanding applications. Compliant with RoHS and REACH standards for safe and reliable use.

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Product Parameters

  • Part Number NNU 4968 B/SPW33
  • Size 340 mm x 460 mm x 118 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 340 mm
  • Bore Dia Tolerance -0.023mm to 0
  • Outer Dia 460 mm
  • Outer Dia Tolerance -0.023mm to 0
  • Width 118 mm
  • Width Tolerance -0.40mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 3 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 3 mm
  • Permissible Axial Displacement(max.) 5.5 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 247500 lbf
  • Static Radial Load 596250 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 59 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
  • Shoulder Dia Outer Ring 419 mm
  • Raceway Diameter Inner Ring 379 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4968 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4968 B/SPW33 Bearing

NNU 4968 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 247500 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 2000 rpm, it balances durability and efficiency in demanding conditions.

NNU 4968 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 makes NNU 4968 B/SPW33 Bearing a practical choice for industrial machinery.

Application

Industrial Uses of NNU 4968 B/SPW33 Bearing
NNU 4968 B/SPW33 Bearing is commonly used in heavy industrial machinery, such as large gearboxes and rolling mills, where its double-row design handles combined loads efficiently. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

What Makes NNU 4968 B/SPW33 Bearing a Preferred Choice?
In wind turbine applications, NNU 4968 B/SPW33 Bearing’s high dynamic radial load capacity makes it reliable for supporting rotor shafts. Its chrome steel construction also resists wear, even in variable weather conditions.

Built for Heavy-Duty Use: NNU 4968 B/SPW33 Bearing
For mining equipment, NNU 4968 B/SPW33 Bearing’s robust design withstands extreme loads and vibrations. The grease or oil lubrication options provide flexibility for different operational environments.

Automotive vs Aerospace: Applications of NNU 4968 B/SPW33 Bearing
In automotive manufacturing, NNU 4968 B/SPW33 Bearing is used in large presses and stamping machines. For aerospace, its precision ensures smooth operation in landing gear systems.

Where Is NNU 4968 B/SPW33 Bearing Used?
NNU 4968 B/SPW33 Bearing finds its place in paper mills, where its high-speed capability and axial displacement tolerance are essential. The metric dimensions make it compatible with European machinery standards.

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