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N Bearing Series

The SKF N Bearing cylindrical roller bearing is commonly found in gearboxes and pumps. These roller bearings have an outer ring which slides in both directions. They have a high radial load capacity and excellent running properties.

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Key characteristics of SKF N series bearings

Function:

  • Take radial loads only (no axial load capacity).
  • Allow free axial displacement in both directions, making them ideal as the “floating” bearing in a bearing arrangement.

Design features:

  • Inner ring with two flanges; flange‑less outer ring.
  • Single row of cylindrical rollers with line contact for high load capacity and stiffness.
  • Suitable for high-speed operation with low friction, when correctly lubricated.

Typical use cases:

  • As the floating bearing in motor and gearbox arrangements, paired with a locating bearing (e.g. NJ or NUP type).
  • Applications where thermal expansion or shaft movement must be accommodated without inducing axial stress in the bearing.

SKF N Bearing Series FAQs

What is an SKF N Series bearing?

The N Series is a single-row cylindrical roller bearing in which:

  • The inner ring has two flanges, and the outer ring has none.

  • Designed to carry heavy radial loads.

  • Allows the axial displacement of the shaft relative to the housing (useful in thermal expansion or misaligned shafts).

Applications of N Series bearings

  • Electric motors and generators

  • Gearboxes and speed reducers

  • Machine tool spindles (radial load only)

  • Pumps and compressors

  • Automotive gearboxes and shafts

Ideal where high radial load is applied and axial displacement of the shaft is required.

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