NU 309 ECML Bearings
NU 309 ECJ Bearings
NU 309 ECJ Bearings

NU 309 ECM Bearings

NU 309 ECM Bearings
NU 309 ECM

NU 309 ECM Single row cylindrical roller bearing, NU design

Technical Specification of NU 309 ECM Bearings

Dimensions of NU 309 ECM Bearings

45 mm
Bore diameter
100 mm
Outside diameter
25 mm
83.2 mm
Shoulder diameter of outer ring
58.5 mm
Raceway diameter of inner ring
min.1.5 mm
Chamfer dimension
min.1.5 mm
Chamfer dimension
max.1.7 mm
Permissible axial displacement

Abutment Dimensions of NU 309 ECM Bearings

min.54 mm
Diameter of spacer sleeve
max.56 mm
Diameter of spacer sleeve
min.60 mm
Diameter of shaft abutment
max.91.4 mm
Diameter of housing abutment
max.1.5 mm
Radius of fillet
max.1.5 mm
Radius of fillet

Caliculation Data of NU 309 ECM Bearings

Basic dynamic load ratingC
112 kN
Basic static load ratingC0
100 kN
Fatigue load limitPu
12.9 kN
Reference speed 
7 500 r/min
Limiting speed 
8 500 r/min
Minimum load factorkr
Limiting valuee
Calculation factorY

Mass of NU 309 ECM Bearings

1 kg

Product Features of NU 309 ECM Bearings

  • high carrying capacity
  • high stiffness
  • Adapt to axial displacement
    Bearings with ribs on both inner and outer rings are excluded.
  • low friction
  • Open flange design
    Together with the roller end design and surface finish, it promotes lubricant film formation, which reduces friction and increases axial load capacity.
  • long lasting
    Logarithmic roller profile reduces edge stress at roller/raceway contact and susceptibility to misalignment and shaft deflection.
  • Enhanced operational reliability
    The surface finish of the roller and raceway contact surfaces supports the formation of a hydrodynamic lubricant film.
  • separable and interchangeable
    The separable parts of cylindrical roller bearings are interchangeable. This facilitates installation and removal as well as maintenance inspections.

Applications of NU 309 ECM Bearings

  • Here are examples of applications in which Cylindrical roller bearings might be used:​
  • Mining operations, paper mills, oil fields, marine industry, steel, electrical, construction machinery, all types of specialized machinery and all types of heavy industry.
Applications of W 618/0.6 Bearings
Applications of Bearings
Wind Turbines
Applications of Bearings
Steel Industry
Applications of Bearings
Applications of Bearings
Food Processing Machinery
Applications of Bearings
Applications of Bearings
Mining & Construction
Applications of Bearings
Electric motors and generators

Product classification of Cylindrical roller bearings

FAQ of NU 309 ECM Bearings

  • Ball bearings are ideal for high-speed rotation, while roller bearings are more suited for high loads.
  • Because cylindrical roller bearings have separable inner and outer rings, they generally do not come with seals (open specification). As such, please apply seals or other protection around the equipment mounting.
  • EW Series bearings are small and utilize a pressed cage, making them suitable for standard operating conditions. ET Series bearings use a polyamide-resin cage suited for high temperatures. Finally, EM Series bearings have machined cages for use in harsh conditions such as gearboxes or vibrating machinery or in applications where the bearing must be quiet, such as in mid-to-large size motors.

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