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Double Row Super-Precision Cylindrical Roller Bearings NNU 4934 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4934 B/SPW33

The NNU 4934 B/SPW33 is a double-row cylindrical roller bearing with a 170mm bore and 230mm outer diameter, crafted from durable chrome steel. It handles combined loads up to 75600 lbf and runs smoothly at speeds up to 4000 RPM.

Its open design allows for 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 pumps where precision and durability are key.

Weighing 6.95kg, 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 4934 B/SPW33
  • Size 170 mm x 230 mm x 60 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 170 mm
  • Bore Dia Tolerance -0.013mm to 0
  • Outer Dia 230 mm
  • Outer Dia Tolerance -0.015mm to 0
  • Width 60 mm
  • Width Tolerance -0.25mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 2 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 2 mm
  • Permissible Axial Displacement(max.) 2 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 75600 lbf
  • Static Radial Load 156375 lbf
  • Max Speed 4000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 6.95 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 5.5 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 210.9 mm
  • Raceway Diameter Inner Ring 188.5 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4934 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4934 B/SPW33 Bearing

NNU 4934 B/SPW33 Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 75600 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 4000 rpm, it delivers reliable performance under demanding conditions.

NNU 4934 B/SPW33 Bearing operates efficiently within a temperature range of -30° to 110 °C.
Its open seal type allows for easy lubrication with grease or oil, reducing maintenance needs.

The precise tolerances and chamfer dimensions enhance installation ease and operational smoothness.
This bearing is ideal for applications requiring both radial and axial load support.

Application

Industrial Uses of NNU 4934 B/SPW33 Bearing
NNU 4934 B/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.

In automotive manufacturing, NNU 4934 B/SPW33 Bearing supports high-precision components like gear shafts and transmission systems. Its chrome steel construction provides durability under high-speed operations, making it a reliable choice for production lines.

For automation systems, NNU 4934 B/SPW33 Bearing is ideal for robotic arms and CNC machines, where its precise tolerances ensure smooth movement. The grease or oil lubrication options offer flexibility depending on the operating environment.

What Makes NNU 4934 B/SPW33 Bearing a Preferred Choice?
NNU 4934 B/SPW33 Bearing is often selected for wind turbine applications due to its ability to withstand heavy radial loads and moderate axial displacement. The metric sizing ensures compatibility with European-designed equipment.

In paper processing plants, NNU 4934 B/SPW33 Bearing is used in rollers and drying cylinders, where its high dynamic load capacity reduces downtime. The temperature range also makes it suitable for various industrial climates.

Built for Heavy-Duty Use: NNU 4934 B/SPW33 Bearing
NNU 4934 B/SPW33 Bearing is a solid choice for construction equipment like cranes and excavators, where its robust design handles uneven loads. The chamfered edges prevent stress concentration, extending bearing life.

For printing presses, NNU 4934 B/SPW33 Bearing ensures precise alignment of rollers, contributing to consistent print quality. Its high-speed capability is particularly useful in modern high-volume printing operations.

Automotive vs Aerospace: Applications of NNU 4934 B/SPW33 Bearing
In automotive applications, NNU 4934 B/SPW33 Bearing is frequently used in wheel hubs and differential systems. The combined load capacity makes it versatile for various vehicle components.

For aerospace ground equipment, NNU 4934 B/SPW33 Bearing is employed in maintenance platforms and cargo loaders. Its precision construction meets the stringent requirements of aviation support systems.

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