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Double Row Super-Precision Cylindrical Roller Bearings NNU 4992 B/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4992 B/SPW33

The NNU 4992 B/SPW33 is a double-row cylindrical roller bearing with a large 460mm bore and 620mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 470,250 lbf and runs smoothly at speeds up to 1000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction provides extra 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 heavy machinery or industrial equipment where high radial and axial loads are common.

Weighing 142kg, it’s a robust component designed for demanding applications. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NNU 4992 B/SPW33
  • Size 460 mm x 620 mm x 160 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 460 mm
  • Bore Dia Tolerance -0.028mm to 0
  • Outer Dia 620 mm
  • Outer Dia Tolerance -0.028mm to 0
  • Width 160 mm
  • Width Tolerance -0.45mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 4 mm
  • Permissible Axial Displacement(max.) 3.2 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 470250 lbf
  • Static Radial Load 1237500 lbf
  • Max Speed 1000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 142 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
  • Shoulder Dia Outer Ring 567 mm
  • Raceway Diameter Inner Ring 510 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4992 B/SPW33 dimension drawing
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Features

Performance Features of NNU 4992 B/SPW33 Bearing

NNU 4992 B/SPW33 Bearing is built with chrome steel rings and rollers, offering strong resistance to combined loads.
Its dynamic radial load capacity reaches 470,250 lbf, making it suitable for heavy-duty applications.

The double-row cylindrical design ensures stability and precision in high-performance settings.
With a maximum speed of 1,000 rpm, it balances durability and efficiency for industrial use.

NNU 4992 B/SPW33 Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open seal type allows for easy lubrication with grease or oil, reducing maintenance needs.

The precise bore and outer diameter tolerances ensure a secure fit in demanding machinery.
This bearing’s robust construction makes it a reliable choice for long-term performance.

Application

Industrial Uses of NNU 4992 B/SPW33 Bearing
NNU 4992 B/SPW33 Bearing is commonly used in heavy industrial machinery, such as large machine tools and rolling mills, where its double-row design handles high radial and axial loads. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

Where Is NNU 4992 B/SPW33 Bearing Used?
In wind turbines, NNU 4992 B/SPW33 Bearing supports the main shaft, providing stability under varying wind loads. Its chrome steel construction ensures durability in harsh outdoor environments.

Built for Heavy-Duty Use: NNU 4992 B/SPW33 Bearing
NNU 4992 B/SPW33 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 4992 B/SPW33 Bearing
In automotive testing rigs, NNU 4992 B/SPW33 Bearing handles combined loads during endurance tests. For aerospace, its precision makes it suitable for ground support equipment, though not for in-flight use.

Key Fields for NNU 4992 B/SPW33 Bearing
NNU 4992 B/SPW33 Bearing is ideal for steel processing plants, where its large bore diameter fits heavy shafts. The temperature range ensures reliability even in high-heat environments.

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