Bearings by size

170×360×120 mmbearing

2 standard bearings share the 170×360×120 mm envelope (bore × outside diameter × width). They fit the same shaft and housing bore but are different bearing types.

DesignationTypeLoadsSize
NU2334 / NJ2334 / NUP2334Cylindrical roller bearingHigh radial; NJ/NUP limited axial170 × 360 × 120 mm
22334Spherical roller bearingVery high radial, axial both directions170 × 360 × 120 mm

Same size is not the same bearing. These types carry loads in different directions, have different speed limits and may need different fits, preload or lubrication. Swapping one for another needs an engineering check, not just a matching size.

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