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Double Row Super-Precision Cylindrical Roller Bearings NN 3068 K/SPW33

Double Row Super-Precision Cylindrical Roller Bearings NN 3068 K/SPW33

The NN 3068 K/SPW33 is a double-row cylindrical roller bearing with a 340mm bore and 520mm outer diameter, built from sturdy chrome steel. It handles combined loads up to 371250 lbf and runs smoothly at speeds up to 2000 RPM.

Its open design allows easy lubrication with grease or oil, while the tapered bore ensures a secure fit. The bearing operates well in temperatures 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 industrial gearboxes or large machinery where precision and durability are key.

Weighing 94.5kg, it’s a robust option for demanding environments. Compliant with RoHS and REACH standards for safe use.

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Product Parameters

  • Part Number NN 3068 K/SPW33
  • Size 340 mm x 520 mm x 133 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 340 mm
  • Bore Dia Tolerance 0 to +0.040mm
  • Outer Dia 520 mm
  • Outer Dia Tolerance -0.028mm to 0
  • Width 133 mm
  • Width Tolerance -0.40mm to 0
  • Chamfer Dimension Outer Ring(r1,2)(min.) 5 mm
  • Chamfer Dimension Inner Ring(r3,4)(min.) 2.5 mm
  • Permissible Axial Displacement(max.) 10.9 mm
  • Ring Material Chrome Steel
  • Roller Material Chrome Steel
  • Dynamic Radial Load 371250 lbf
  • Static Radial Load 731250 lbf
  • Max Speed 2000 rpm
  • Lubrication Grease, Oil
  • Temperature Range -30° to 110 °C
  • RoHS Compliant
  • REACH Compliant
  • Weight 94.5 kg
  • Width Annular Lubrication Groove Outer Ring(B1) 16.7 mm
  • Diameter Lubrication Hole (outer Ring) (K) 9 mm
Double Row Super-Precision Cylindrical Roller Bearings NN 3068 K/SPW33 dimension drawing
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Features

Performance Features of NN 3068 K/SPW33 Bearing

NN 3068 K/SPW33 Bearing is built with chrome steel rings and rollers, offering high resistance to combined loads.
Its dynamic radial load capacity reaches 371250 lbf, making it suitable for heavy-duty applications.

The double-row cylindrical design ensures stability and precision, even at high speeds up to 2000 rpm.
With a tapered bore of 1:12, it provides secure fitting and easy installation.

NN 3068 K/SPW33 Bearing operates efficiently in temperatures ranging from -30° to 110°C.
Its open design allows for flexible lubrication options, either grease or oil, ensuring smooth performance.

The bearing’s chamfer dimensions and permissible axial displacement of 10.9 mm enhance its adaptability.
This design reduces stress concentrations, prolonging the bearing’s service life in demanding conditions.

Application

Industrial Uses of NN 3068 K/SPW33 Bearing
NN 3068 K/SPW33 Bearing is commonly used in heavy machinery like rolling mills and gearboxes, where its double-row design handles high radial and axial loads with ease. The tapered bore ensures a secure fit, reducing slippage during operation.

In wind turbines, NN 3068 K/SPW33 Bearing supports the main shaft, offering stability under varying wind conditions. Its chrome steel construction provides long-lasting performance even in harsh environments.

For precision machine tools, NN 3068 K/SPW33 Bearing’s open design allows for efficient lubrication, ensuring smooth operation at high speeds. The wide temperature range makes it suitable for both hot and cold working conditions.

What Makes NN 3068 K/SPW33 Bearing a Preferred Choice?
NN 3068 K/SPW33 Bearing excels in applications like paper mills, where its high dynamic load capacity ensures reliable performance under constant stress. The grease or oil lubrication options add versatility for different operational needs.

In construction equipment, NN 3068 K/SPW33 Bearing’s robust design withstands heavy loads and shocks, making it ideal for cranes and excavators. The metric sizing ensures compatibility with a range of international machinery standards.

Built for Heavy-Duty Use: NN 3068 K/SPW33 Bearing
NN 3068 K/SPW33 Bearing is a go-to choice for mining equipment, where its durability and high load capacity are critical. The open seal design simplifies maintenance, even in dusty or wet conditions.

For marine applications, NN 3068 K/SPW33 Bearing’s corrosion-resistant materials and grease lubrication ensure reliable performance in saltwater environments. Its tapered bore design also aids in easy installation and removal.

Automotive vs Aerospace: Applications of NN 3068 K/SPW33 Bearing
In automotive manufacturing, NN 3068 K/SPW33 Bearing is used in large presses and stamping machines, where precision and strength are key. Its combined load handling makes it versatile for various production stages.

In aerospace, NN 3068 K/SPW33 Bearing supports ground equipment like aircraft tugs and loading systems. The high-speed capability and temperature tolerance ensure consistent performance under demanding conditions.

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