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Double Row Super-Precision Cylindrical Roller Bearings NNU 4920 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4920 B/SPW33

The NNU 4920 B/SPW33 is a double-row cylindrical roller bearing with a 100mm bore and 140mm outer diameter, crafted from durable chrome steel. It handles combined loads up to 28800 lbf and operates smoothly at speeds up to 6000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction provides stability under heavy loads. The bearing performs reliably in temperatures ranging from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a practical choice for replacements. Ideal for industrial machinery or precision equipment where high radial and axial loads are present.

Weighing 1.9kg, it’s robust yet manageable for its size. Compliant with RoHS and REACH standards, ensuring safe and eco-friendly use. The lubrication groove and holes simplify maintenance.

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Product Parameters

  • Part Number NNU 4920 B/SPW33
  • Size 100 mm x 140 mm x 40 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 100 mm
  • Bore Dia Tolerance -0.010mm to 0
  • Outer Dia 140 mm
  • Outer Dia Tolerance -0.011mm to 0
  • Width 40 mm
  • Width Tolerance -0.20mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 1.1 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 1.1 mm
  • Permissible Axial Displacement(max.) 1.1 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 28800 lbf
  • Static Radial Load 57375 lbf
  • Max Speed 6000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 1.9 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 5.5 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 125.8 mm
  • Raceway Diameter Inner Ring 113 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4920 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4920 B/SPW33 Bearing

NNU 4920 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 28,800 lbf, ensuring reliable performance in demanding conditions.

The double-row design enhances stability and load distribution, making it suitable for precision applications.
With a maximum speed of 6,000 rpm, it balances durability and efficiency.

NNU 4920 B/SPW33 Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, reducing maintenance needs.

The precise chamfer dimensions and lubrication grooves ensure optimal performance.
This bearing is ideal for applications requiring high precision and long service life.

Application

Industrial Uses of NNU 4920 B/SPW33 Bearing
NNU 4920 B/SPW33 Bearing is commonly used in heavy-duty machine tools, where its double-row design handles both radial and axial loads efficiently. The open seal type allows for easy lubrication, making it suitable for high-speed operations up to 6000 rpm.

In automotive applications, NNU 4920 B/SPW33 Bearing supports gearboxes and drivetrains, ensuring smooth performance under combined loads. Its chrome steel construction provides durability, even in demanding conditions.

For automation systems, NNU 4920 B/SPW33 Bearing is ideal for robotic arms and precision machinery, where its high load capacity and stability are key. The metric sizing ensures compatibility with a wide range of industrial equipment.

Medical imaging devices also benefit from NNU 4920 B/SPW33 Bearing’s precision and reliability. The grease or oil lubrication options make it adaptable to various operational environments.

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