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Cylindrical Roller Bearings — SKF NU/NJ/NUP Series — SKF pneumatic product available at Shri Narayan Machinery LLP Noida
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Cylindrical Roller Bearings — SKF NU/NJ/NUP Series

SKF Cylindrical Roller Bearings in the NU, NJ, and NUP configurations deliver the highest radial load capacity of any rolling bearing type relative to their size. The separable inner ring design of the NU type allows free axial displacement of the shaft relative to the housing, making these bearings ideal for non-locating bearing positions in electric motors, gearboxes, and pumps. NJ and NUP types provide limited axial guidance in one or both directions respectively. SKF's Explorer class cylindrical roller bearings feature a logarithmic roller profile that eliminates edge stress under heavy loads, extending fatigue life by up to 3 times compared to conventional designs. Available in bore sizes from 20mm to 200mm, these bearings are manufactured to ISO 15 standards. Shri Narayan Machinery LLP in Noida supplies the full SKF cylindrical roller bearing range with technical guidance for proper selection, fit, and lubrication.

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Type: Single Row Cylindrical RollerConfigurations: NU (no axial guidance), NJ (one-direction), NUP (both directions)Bore Size Range: 20mm to 200mmOuter Diameter Range: 47mm to 360mm

Key Features

Highest radial load capacity per unit cross-section of any bearing type
Separable inner ring (NU type) enables easy mounting and free axial shaft movement
NJ type provides one-direction axial guidance; NUP provides both directions
SKF Explorer logarithmic roller profile eliminates edge stress for 3x longer life
High-speed capability — optimized cage designs for speeds up to 15,000 RPM
Available with pressed steel, machined brass, or polyamide cages
Full complement (no cage) variants for maximum load in low-speed applications
Conforms to ISO 15 for global dimensional interchangeability

Technical Specifications

TypeSingle Row Cylindrical Roller
ConfigurationsNU (no axial guidance), NJ (one-direction), NUP (both directions)
Bore Size Range20mm to 200mm
Outer Diameter Range47mm to 360mm
Width Range14mm to 58mm
Dynamic Load Rating (max)Up to 540 kN (NUP 2300 series, large sizes)
Static Load Rating (max)Up to 560 kN
Limiting SpeedUp to 15,000 RPM (small bores, caged variants)
Clearance OptionsCN (Normal), C3, C4
StandardsISO 15
Cage MaterialPressed steel, machined brass, or polyamide

Applications

The Cylindrical Roller Bearings is used across a wide range of industrial applications:

  • Electric motors — non-locating bearing position in medium and large motors
  • Industrial gearboxes — high radial loads on intermediate and output shafts
  • Centrifugal pumps — drive-end bearings handling impeller and coupling forces
  • Traction motors — rail and metro locomotive wheel-set bearings
  • Rolling mills — work roll and backup roll bearings in metal processing
  • Compressors — main shaft bearings in screw and reciprocating compressors

Industries Served

Electric Motors & GeneratorsPower Transmission & GearboxesPumps & Fluid HandlingRail & TransportationSteel & Metal Processing

Need Cylindrical Roller Bearings? Get the Best Dealer Price

As your SKF dealer, Shri Narayan Machinery LLP offers competitive pricing on the entire Cylindrical Roller Bearings range. Contact us for availability and your best quote.

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C-101, Sector 9, Noida, Uttar Pradesh 201301 | SKF Dealer

Frequently Asked Questions — Cylindrical Roller Bearings

NU bearings have flanges on the outer ring only, allowing free axial movement of the shaft — ideal for non-locating positions. NJ bearings add a loose flange on the inner ring for one-direction axial guidance. NUP bearings have both a fixed and a loose inner ring flange for axial guidance in both directions. Choose based on whether your application requires pure radial support (NU), limited axial retention (NJ), or full axial guidance (NUP).

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