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Double Row Super-Precision Cylindrical Roller Bearings NNU 4930 BK/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NNU 4930 BK/SPW33

The NNU 4930 BK/SPW33 is a double-row cylindrical roller bearing with a 150mm bore and 210mm outer diameter, crafted from sturdy chrome steel. It handles combined loads up to 74250 lbf and runs smoothly at speeds up to 4000 RPM.

Its open design allows for easy lubrication with grease or oil, while the double-row construction ensures stability under heavy loads. The bearing operates well in temperatures from -30°C to 110°C.

With a tapered bore for secure fitting, this model is interchangeable with SKF bearings, making it a reliable choice for replacements. Ideal for precision applications like machine tools or industrial gearboxes where high radial loads are common.

Weighing 6.25kg, it’s built for durability while maintaining precision. Compliant with RoHS and REACH standards for safe industrial use.

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Product Parameters

  • Part Number NNU 4930 BK/SPW33
  • Size 150 mm x 210 mm x 60 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 150 mm
  • Bore Dia Tolerance 0 to +0.025mm
  • Outer Dia 210 mm
  • Outer Dia Tolerance -0.015mm to 0
  • Width 60 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.) 2 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 74250 lbf
  • Static Radial Load 147375 lbf
  • Max Speed 4000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 6.25 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 5.5 mm
  • Diameter Lubrication Hole (outer Ring) (K) 3 mm
  • Shoulder Dia Outer Ring 190.9 mm
  • Raceway Diameter Inner Ring 168.5 mm
Double Row Super-Precision Cylindrical Roller Bearings NNU 4930 BK/SPW33 dimension drawing
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Features

Performance Features of NNU 4930 BK/SPW33 Bearing

NNU 4930 BK/SPW33 Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 74,250 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 4,000 rpm, it balances efficiency and durability.

NNU 4930 BK/SPW33 Bearing operates smoothly in temperatures ranging from -30° to 110°C.
Its open design allows for easy lubrication with grease or oil, extending service life.

The tapered bore design ensures secure fitting, minimising slippage during operation.
Precision engineering guarantees consistent performance even under heavy radial loads.

Application

Industrial Uses of NNU 4930 BK/SPW33 Bearing
NNU 4930 BK/SPW33 Bearing is commonly used in heavy machinery like lathes and milling machines, where its double-row design handles combined loads with ease. The open seal type allows for efficient lubrication, ensuring long service life in demanding conditions.

What Makes NNU 4930 BK/SPW33 Bearing a Preferred Choice?
In automotive applications, NNU 4930 BK/SPW33 Bearing supports high-precision components such as gearboxes and drivetrains. Its chrome steel construction offers durability, while the tapered bore ensures a secure fit for high-speed operations.

Perfect Fit for Automation: NNU 4930 BK/SPW33 Bearing
For robotics and automation systems, NNU 4930 BK/SPW33 Bearing provides reliable performance in robotic arms and CNC machines. The grease or oil lubrication options make it adaptable to various operational environments.

Medical vs Industrial: Where NNU 4930 BK/SPW33 Bearing Excels
In medical imaging devices, NNU 4930 BK/SPW33 Bearing’s precision ensures smooth operation, while in industrial settings, it excels in conveyor systems and heavy-duty equipment. Its wide temperature range adds to its versatility.

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