Double Row Super-Precision Cylindrical Roller Bearings NNU 49/500 BK/SPW33X

The NNU 49/500 BK/SPW33X is a double-row cylindrical roller bearing with a large 500mm bore and 670mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 524,250 lbf and runs smoothly at speeds up to 1000 RPM.

Its open design allows flexible lubrication with grease or oil, while the tapered bore ensures secure fitting. The bearing operates reliably 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-duty applications like industrial gearboxes or large machinery where precision and durability are key.

Weighing 173kg, it’s built for robust performance in demanding environments. Compliant with RoHS and REACH standards for safe use.

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Description

Features

Application

Q&A

Product Parameters

Part Number NNU 49/500 BK/SPW33X
Size 500 mm x 670 mm x 170 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 500 mm
Bore Dia Tolerance 0 to +0.045mm
Outer Dia 670 mm
Outer Dia Tolerance -0.035mm to 0
Width 170 mm
Width Tolerance -0.45mm to 0
Chamfer Dimension Outer Ring(r1,2)(min.) 5 mm
Chamfer Dimension Inner Ring(r3,4)(min.) 3 mm
Permissible Axial Displacement(max.) 3.5 mm
Ring Material Chrome Steel
Roller Material Chrome Steel
Dynamic Radial Load 524250 lbf
Static Radial Load 1372500 lbf
Max Speed 1000 rpm
Lubrication Grease, Oil
Temperature Range -30° to 110 °C
RoHS Compliant
REACH Compliant
Weight 173 kg
Width Annular Lubrication Groove Outer Ring(B1) 22.3 mm
Diameter Lubrication Hole (outer Ring) (K) 12 mm
Shoulder Dia Outer Ring 611.6 mm
Raceway Diameter Inner Ring 554 mm

Double Row Super-Precision Cylindrical Roller Bearings NNU 49/500 BK/SPW33X dimension drawing

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Features

Performance Features of NNU 49/500 BK/SPW33X Bearing

NNU 49/500 BK/SPW33X Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 524,250 lbf, making it suitable for heavy-duty applications.

The double-row design enhances stability and load distribution, ensuring smooth operation.
With a maximum speed of 1,000 rpm, it balances performance and durability in demanding conditions.

NNU 49/500 BK/SPW33X Bearing operates efficiently in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, reducing maintenance needs.

The tapered bore design ensures secure fitting, minimising slippage during operation.
Precision engineering extends its service life, even under continuous heavy loads.

Application

Industrial Uses of NNU 49/500 BK/SPW33X Bearing
NNU 49/500 BK/SPW33X Bearing is commonly used in heavy industrial machinery, such as large gearboxes and rolling mills, 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.

What Makes NNU 49/500 BK/SPW33X Bearing a Preferred Choice?
In wind turbine applications, NNU 49/500 BK/SPW33X Bearing provides reliable performance due to its high dynamic radial load capacity and tapered bore for secure fitting. Its chrome steel construction ensures durability even in harsh outdoor environments.

Built for Heavy-Duty Use: NNU 49/500 BK/SPW33X Bearing
NNU 49/500 BK/SPW33X Bearing excels in paper manufacturing equipment, where its precision cylindrical rollers reduce friction and wear. The wide temperature range makes it suitable for both hot and cold processing stages.

Automotive vs Aerospace: Applications of NNU 49/500 BK/SPW33X Bearing
In automotive testing rigs, NNU 49/500 BK/SPW33X Bearing supports high-speed rotations with minimal vibration. For aerospace ground equipment, its large bore diameter accommodates heavy shafts while maintaining precise alignment.

Key Fields for NNU 49/500 BK/SPW33X Bearing
NNU 49/500 BK/SPW33X Bearing is ideal for steel production lines, where its static radial load capacity withstands extreme pressures. The grease or oil lubrication options provide flexibility for different operational needs.