NTN6314LLUC3Deep Groove Ball Bearing – Straight Bore, 70 mm ID, 150 mm OD, 35 mm Width, Contact Rubber Seals Both Sides, C3 Internal Clearance.

Product Description

What this part is

NTN 6314LLUC3 single row deep groove ball bearing. Bore 70 mm, outside diameter 150 mm, width 35 mm. Contact rubber seals on both faces, pressed steel cage, straight bore, C3 internal clearance.

Decoding the designation

63 is the medium 6300 dimension series and 14 is the bore code, five times fourteen giving 70 mm. LLU is the NTN code for contact rubber lip seals fitted to both sides. C3 is radial internal clearance greater than normal.

What these specs mean in practice

A deep groove ball bearing takes radial load with moderate thrust in either direction. Load ratings are 119 kN dynamic and 76.5 kN static, with a limiting speed of 3400 rpm. The 6300 series gives a heavier section and higher capacity than the 6200 series at the same bore, in exchange for a larger outside diameter.

Closure and lubrication

Contact seals run a rubber lip against the inner ring, so dirt exclusion and grease retention are better than a shield gives, at the cost of a little more running torque and a lower speed ceiling. Supplied greased and sealed for life — there is no relubrication provision. Working range −30 °C to 120 °C.

Internal clearance

C3 leaves more room between balls and raceways than normal clearance. That extra room absorbs the loss of clearance caused by an interference fit on the shaft and by a hot inner ring running warmer than the housing, which is why C3 is specified on electric motors, fans and gearboxes with a temperature gradient across the bearing.

Quantity and configuration

1 Pc. Complete bearing, sealed both sides, no snap ring groove.

Interchange guidance

SKF 6314-2RS1/C3 and FAG 6314-2RSR-C3 are the same envelope, the same contact-seal closure and the same C3 clearance. A 6314-2Z or 6314-2RS at normal clearance is a related size rather than a substitution, because the closure type and the clearance class both change.