+86 15806631151 [email protected]
TFL BEARINGS
REQUEST A QUOTE
Double Row Super-Precision Cylindrical Roller Bearings NNU 4936 BK/SPW33

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

The NNU 4936 BK/SPW33 is a double-row cylindrical roller bearing with a 180mm bore and 250mm outer diameter, designed for combined loads. Made from durable chrome steel, it handles radial loads up to 90450 lbf and operates smoothly at speeds up to 3000 RPM.

Its open design allows for easy lubrication with grease or oil, while the tapered bore ensures a secure fit. The bearing works well in temperatures ranging from -30°C to 110°C.

This model is interchangeable with SKF bearings, making it a reliable choice for replacements. Ideal for heavy-duty applications like machine tools or industrial gearboxes where precision and durability are key.

Weighing 10.5kg, it’s built to last and complies with RoHS and REACH standards for safe use. The annular lubrication groove and holes make maintenance straightforward.

Get A Free Quote
    Description Features Application Q&A Featured Products Our Process

Product Parameters

  • Part Number NNU 4936 BK/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 Taper 1:12
  • For Load Direction Combined
  • Construction Double Row
  • Seal Type Open
  • Bore Dia 180 mm
  • Bore Dia Tolerance 0 to +0.025mm
  • 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.) 1 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 BK/SPW33 dimension drawing
Download DWG Download PDF

Features

Performance Features of NNU 4936 BK/SPW33 Bearing

NNU 4936 BK/SPW33 Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 90,450 lbf, making it suitable for demanding industrial applications.

The double-row cylindrical design ensures stability and precision in high-speed operations.
With a maximum speed of 3,000 rpm, it delivers reliable performance under various conditions.

NNU 4936 BK/SPW33 Bearing’s tapered bore design simplifies installation and alignment.
The open seal type allows for easy lubrication with grease or oil, enhancing its longevity.

This bearing operates efficiently within a temperature range of -30° to 110°C.
Its robust construction ensures durability even in challenging environments.

Application

Industrial Uses of NNU 4936 BK/SPW33 Bearing
NNU 4936 BK/SPW33 Bearing is commonly used in heavy industrial machinery, such as large lathes and rolling mills, where its double-row design handles both radial and axial loads efficiently. The open seal type allows for easy lubrication, making it suitable for high-speed operations up to 3000 rpm.

In the automotive sector, NNU 4936 BK/SPW33 Bearing is ideal for gearboxes and drivetrains, thanks to its high dynamic radial load capacity of 90450 lbf. The chrome steel construction ensures durability even under demanding conditions.

For precision equipment like CNC machines, NNU 4936 BK/SPW33 Bearing provides stable performance due to its tight tolerances and tapered bore design. The grease or oil lubrication options make it adaptable to various operational environments.

What Makes NNU 4936 BK/SPW33 Bearing a Preferred Choice?
NNU 4936 BK/SPW33 Bearing is a reliable option for wind turbines, where its combined load capacity and high-speed tolerance are essential. The annular lubrication groove ensures consistent performance in remote or hard-to-access locations.

In robotics and automation, NNU 4936 BK/SPW33 Bearing supports precise movements in robotic arms and linear guides. Its chrome steel rollers and rings offer long service life, reducing maintenance needs.

Built for Heavy-Duty Use: NNU 4936 BK/SPW33 Bearing
NNU 4936 BK/SPW33 Bearing excels in construction equipment like cranes and excavators, where its static radial load capacity of 191250 lbf is crucial. The wide temperature range (-30° to 110 °C) ensures reliability in diverse climates.

For paper manufacturing machinery, NNU 4936 BK/SPW33 Bearing’s resistance to wear and high load capacity make it a practical choice. The metric sizing ensures compatibility with standard industrial components.

Automotive vs Aerospace: Applications of NNU 4936 BK/SPW33 Bearing
In automotive applications, NNU 4936 BK/SPW33 Bearing is often found in high-performance transmissions, where its precision and durability are key. The tapered bore design simplifies installation and alignment.

In aerospace, NNU 4936 BK/SPW33 Bearing is used in landing gear systems, benefiting from its high load capacity and temperature stability. The open seal design allows for easy inspection and maintenance.

Q&A

SEND INQUIRY