Double Row Super-Precision Cylindrical Roller Bearings NNU 4936 B/SPW33

The NNU 4936 B/SPW33 is a double-row cylindrical roller bearing with a 180mm bore and 250mm outer diameter, built for combined loads. Made from durable chrome steel, it handles radial loads up to 90450 lbf and spins smoothly at 3000 RPM.
Its open design allows easy lubrication with grease or oil, while the double-row construction provides stability under heavy loads. The bearing operates in temperatures from -30°C to 110°C, making it versatile for various conditions.
With a weight of 10.5kg, it’s robust yet manageable for industrial use. Compliant with RoHS and REACH standards, it’s a reliable choice for machinery requiring precision and durability.
Ideal for applications like machine tools or heavy equipment where high radial loads and precision alignment are needed. Its interchangeable design with SKF bearings simplifies replacements.

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Description

Features

Application

Q&A

Product Parameters

Part Number NNU 4936 B/SPW33
Size 180 mm x 250 mm x 69 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 180 mm
Bore Dia Tolerance -0.013mm to 0
Outer Dia 250 mm
Outer Dia Tolerance -0.018mm to 0
Width 69 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.) 1.1 mm
Ring Material Chrome Steel
Roller Material Chrome Steel
Dynamic Radial Load 90450 lbf
Static Radial Load 191250 lbf
Max Speed 3000 rpm
Lubrication Grease, Oil
Temperature Range -30° to 110 °C
RoHS Compliant
REACH Compliant
Weight 10.5 kg
Width Annular Lubrication Groove Outer Ring(B1) 8.3 mm
Diameter Lubrication Hole (outer Ring) (K) 3 mm
Shoulder Dia Outer Ring 226.05 mm
Raceway Diameter Inner Ring 202 mm

Double Row Super-Precision Cylindrical Roller Bearings NNU 4936 B/SPW33 dimension drawing

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Features

Performance Features of NNU 4936 B/SPW33 Bearing

NNU 4936 B/SPW33 Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 90450 lbf, ensuring reliable performance in demanding conditions.

The double-row design enhances stability and load distribution, making it suitable for precision applications.
With a maximum speed of 3000 rpm, it balances efficiency and durability.

NNU 4936 B/SPW33 Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open construction allows for easy lubrication with grease or oil, reducing maintenance needs.

The precise tolerances and chamfered edges ensure easy installation and alignment.
This bearing is ideal for applications requiring high precision and long service life.

Application

Industrial Uses of NNU 4936 B/SPW33 Bearing
NNU 4936 B/SPW33 Bearing is commonly used in heavy industrial machinery, such as large lathes and milling machines, where its double-row design handles combined loads efficiently. The open seal type allows for easy lubrication, ensuring long service life in demanding conditions.

What Makes NNU 4936 B/SPW33 Bearing a Preferred Choice?
In wind turbine gearboxes, NNU 4936 B/SPW33 Bearing’s high dynamic radial load capacity ensures reliable performance under fluctuating forces. Its chrome steel construction also resists wear, making it suitable for continuous operation.

Perfect Fit for Automation: NNU 4936 B/SPW33 Bearing
For robotic assembly lines, NNU 4936 B/SPW33 Bearing provides precise movement due to its cylindrical roller design. The grease or oil lubrication options adapt well to varying operational speeds and temperatures.

Automotive vs Aerospace: Applications of NNU 4936 B/SPW33 Bearing
In automotive applications, NNU 4936 B/SPW33 Bearing supports drivetrain components, while in aerospace, it’s used in auxiliary systems for its high static radial load capacity. The metric sizing ensures compatibility across industries.

Medical vs Industrial: Where NNU 4936 B/SPW33 Bearing Excels
NNU 4936 B/SPW33 Bearing is found in industrial presses for its durability, whereas in medical imaging devices, its precision ensures smooth operation. The temperature range suits both sterile environments and factory floors.