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

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

The NNU 4964 BK/SPW33 is a double-row cylindrical roller bearing with a 320mm bore and 440mm outer diameter, built for combined loads. Made from chrome steel, it handles radial loads up to 238500 lbf and spins smoothly at 2000 RPM.

Its open design allows easy lubrication with grease or oil, while the tapered bore ensures a secure fit. The bearing operates in temperatures from -30°C to 110°C, making it versatile for various conditions.

This model is interchangeable with SKF bearings, ideal for heavy-duty applications like industrial gearboxes or large machinery. Weighing 48kg, it’s robust yet designed for precision performance.

Compliant with RoHS and REACH standards, it’s a reliable choice for engineers needing durability and high load capacity. The annular lubrication groove simplifies maintenance, extending its service life.

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Product Parameters

  • Part Number NNU 4964 BK/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 Taper 1:12
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Bore Dia 320 mm
  • Bore Dia Tolerance 0 to +0.040mm
  • 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.) 1.5 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 48 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 BK/SPW33 dimension drawing
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Features

Performance Features of NNU 4964 BK/SPW33 Bearing

NNU 4964 BK/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 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 4964 BK/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 various operational needs.

The tapered bore design ensures secure fitting and easy installation.
This feature, combined with precise tolerances, enhances the bearing’s alignment and overall performance.

Application

Industrial Uses of NNU 4964 BK/SPW33 Bearing
NNU 4964 BK/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 taper bore ensures a secure fit, reducing slippage during high-speed operations.

In automotive applications, NNU 4964 BK/SPW33 Bearing supports components like drivetrains and axles, offering stability under heavy radial and axial forces. Its chrome steel construction provides long-lasting performance even in demanding conditions.

For precision equipment like CNC machines, NNU 4964 BK/SPW33 Bearing’s high dynamic load capacity ensures smooth, accurate movements. The open seal design allows for easy lubrication, maintaining optimal performance over time.

Where Is NNU 4964 BK/SPW33 Bearing Used?
NNU 4964 BK/SPW33 Bearing is ideal for wind turbines, where its ability to handle high radial loads and moderate axial displacements is crucial. The grease or oil lubrication options make it adaptable to various environmental conditions.

In robotics, NNU 4964 BK/SPW33 Bearing provides reliable support for articulated arms, ensuring precise movement and durability. Its wide temperature range makes it suitable for both indoor and outdoor applications.

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