The NU306EJ/C3 cylindrical roller bearing is a standard metric single-row bearing characterized by its separable outer ring with two ribs and an inner ring with no ribs, which allows for axial expansion.
Its key dimensions and specifications include:
- Inside Diameter (Bore): 30 mm
- Outside Diameter: 72 mm
- Width: 19 mm
- Radial Clearance: C3 (greater than normal clearance, which helps accommodate thermal expansion)
- Design & Features: "NU" means the inner ring is completely loose/separable, while the "EJ" or "ECJ" suffix denotes an optimized internal design with robust roller guidance, often featuring a pressed steel or engineered plastic cage