NTN 63305LLC3/5C 25x62mm C3 Double-Sealed Deep Groove Ball Bearing

The NTN 63305LLC3/5C is a new, single-row deep groove ball bearing in the 6300 series with a 25 mm bore, 62 mm OD, and 25.4 mm width, made in Japan to NTN's exacting production standards. The "LL" suffix denotes double non-contact rubber (NBR) seals on both sides for retention of factory grease and exclusion of light contaminants, while the "C3" internal clearance designation indicates a radial clearance greater than Normal (CN), suited for applications with interference fits, elevated operating temperatures, or thermally induced shaft growth. The /5C suffix designates NTN's C5 vibration quality grade, confirming low-noise screening for precision-sensitive applications such as electric motors, compressors, gearboxes, pumps, and HVAC blower assemblies. The 6305 dimensional envelope (25×62×17 mm for the standard 6305, but this 63305 wide-series has a 25.4 mm width) carries a higher dynamic load rating than the standard-width 6305, making it well suited for combined radial and light axial loads. Supplied new in the original NTN blue box bearing this exact part number; no re-grease or rebuild required.

Product Specifications