Cylindrical Roller Bearings SKF NJ304 ECP/C3

SKF single-row cylindrical roller bearing NJ304 ECP/C3 with a 20 mm bore, polyamide cage and increased C3 clearance for radial guidance applications.

The SKF NJ304 ECP/C3 cylindrical roller bearing combines an optimised internal design with high load-carrying capacity in a compact footprint. With dimensions of a 20 mm bore, 52 mm outer diameter and 15 mm width, this single-row roller bearing can withstand very high radial loads. As an open design without an integrated seal, the bearing operates directly within the lubrication circuit of your assembly. The NJ design acts as a support bearing, guiding the shaft in the axial direction whilst simultaneously compensating for thermal expansion.

For which operating conditions is the NJ304 ECP/C3 cylindrical roller bearing suitable?

This support bearing is primarily used where heavy radial loads act on rotating shafts and axial guidance in one direction is required. Typical applications include bearing arrangements where thermal longitudinal expansion of the shaft must be accommodated. As the inner ring can be removed from one side, the bearing rings are fitted separately onto the shaft and housing. This simplifies routine maintenance and inspections in industrial plants.

What are the advantages of a polyamide cage and C3 clearance?

The polyamide cage reduces the centrifugal forces acting on the rollers and promotes smooth, low-vibration operation within a temperature range of -30 to +120 degrees Celsius. The increased C3 radial clearance compensates for dimensional changes when temperature differences arise between the inner and outer rings during continuous operation, or when tight fits reduce the operating clearance. When designing the assembly, you should take the lubricant supply into account, as the outer ring is designed without a lubrication groove.