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Double Row Super-Precision Cylindrical Roller Bearings NNU 4964 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4964 B/SPW33

The NNU 4964 B/SPW33 is a double-row cylindrical roller bearing with a 320mm bore and 440mm outer diameter, built from tough chrome steel. It handles combined loads up to 238500 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 55kg, it’s a robust option for demanding applications. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NNU 4964 B/SPW33
  • Size 320 mm x 440 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 320 mm
  • Bore Dia Tolerance -0.023mm to 0
  • Outer Dia 440 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 238500 lbf
  • Static Radial Load 562500 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 55 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
  • Shoulder Dia Outer Ring 399 mm
  • Raceway Diameter Inner Ring 359 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4964 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4964 B/SPW33 Bearing

NNU 4964 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 238500 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 high performance and durability.

NNU 4964 B/SPW33 Bearing operates efficiently in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, simplifying maintenance.

The precise chamfer dimensions and permissible axial displacement of 5.5 mm ensure smooth installation.
This bearing is ideal for applications requiring high precision and long service life.

Application

Industrial Uses of NNU 4964 B/SPW33 Bearing
NNU 4964 B/SPW33 Bearing is commonly used in heavy industrial machinery, such as large lathes and rolling mills, where its double-row design handles combined loads effectively. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

Where Is NNU 4964 B/SPW33 Bearing Used?
In wind turbines, NNU 4964 B/SPW33 Bearing supports the main shaft, providing stability under high radial and axial loads. Its chrome steel construction ensures durability even in harsh outdoor environments.

Built for Heavy-Duty Use: NNU 4964 B/SPW33 Bearing
This bearing excels in paper manufacturing equipment, where its high dynamic radial load capacity keeps production lines running smoothly. The grease or oil lubrication options make it adaptable to different operational needs.

Automotive vs Aerospace: Applications of NNU 4964 B/SPW33 Bearing
In automotive testing rigs, NNU 4964 B/SPW33 Bearing handles extreme loads during durability tests. For aerospace applications, its precision and temperature tolerance make it suitable for ground support equipment.

Key Fields for NNU 4964 B/SPW33 Bearing
NNU 4964 B/SPW33 Bearing is ideal for large pumps and compressors, where its combined load capability ensures reliable performance. The wide temperature range also makes it suitable for both hot and cold operating environments.

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