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Cylindrical Roller Bearing Loose Outer Fixed Inner 300 Series

  • Loose Outer Fixed Inner.
  • 300 Series.

About Cylindrical Roller Bearing

  • Cylindrical roller bearings feature high radial load capacity because the rollers and raceway are in linear contact.
  • These bearings are suitable for applications that involve heavy radial and impact loading.
  • They are also appropriate for high-speed applications in that they can be machined very accurately due to their structure.
  • Having a separable inner ring or outer ring, these bearings can be mounted and dismounted easily.
  • The geometry allows for accurate machining to precision grade quality and uses at high speeds.
  • The inner or outer rings can be separated, simplifying mounting and removal of the bearing.

Single-row Cylindrical Roller Bearings

  • The NU and N types exhibit their best performance when used as free side bearings since they adjust to the shaft's axial movement, to a certain extent, relative to the housing position.
  • The NJ and NF types carry axial load in one direction, while the NUP and NH types can carry a certain degree of axial load in both directions.
  • Type R cylindrical roller bearings feature enhanced load rating compared with standard series, though both have equal dimensions.
  • This is because type R bearings have a different internal design.
  • They are identified by supplementary code "R".

Main Applications

  • Automotive: Internal combustion engines transmissions, and cargo transportation
  • Electrical: Large and medium sizes motors, traction motors, and generators
  • Industrial: Gearboxes and machine tool spindles, steel mills


  • AIMS SKU A0153805
  • Brand Koyo
  • Model Number N305/KOYO
  • Bore Diameter x Outer Diameter x Width (mm) 25 x 62 x 17
  • Mounting Dimension (mm) Dd Min. 40
  • Mounting Dimension (mm) Db Max. 55.5
  • Mounting Dimension (mm) Rb Max. 1
  • Mounting Dimension (mm) Da Min. 31.5
  • Basic Load Rating (kN) Cr 36.6
  • Outside Diameter D (mm) 62
  • Boundary Dimension (mm) Ew 53
  • Limiting Speed (min-1) Grease Oil 10000
  • Mounting Dimension (mm) Ra Max. 1
  • Fatigue Load Limit (kN) Cu 3.45
  • Boundary Dimension (mm) r1 min. 1.1
  • Bore Diameter d (mm) 25
  • Limiting Speed (min-1) Oil Lub 14000
  • Mounting Dimension (mm) Db Min. 55
  • Boundary Dimension (mm) r min. 1.1
  • Mounting Dimension (mm) Da Max. 55.5
  • Basic Load Rating (kN) C0r 25.2
  • Bearing Width B (mm) 17
  • Type Cylindrical Roller Bearings
  • Series 300 Series
SKU: A0153805

Koyo N305 Cylindrical Roller Bearing 25 x 62 x 17mm Loose Outer Fixed Inner

Cylindrical Bearing Loose Outer Fixed Inner 300 Series


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