Koyo KOYO6310-2RDC3 Ball Bearing 50x110x27 C3 Clearance

Product Description

The KOYO KOYO6310-2RDC3 is a single-row deep-groove ball bearing built for applications that demand low torque operation and reliable shaft support. It features a light contact rubber seal on both sides, which reduces drag compared to a full-contact seal while still providing effective contamination protection. The C3 internal clearance rating means the bearing carries more radial play than standard CN clearance, making it well suited for applications where thermal expansion or press-fit mounting conditions require additional running clearance. Licensed HVAC technicians, pump mechanics, and equipment service professionals install this bearing as a direct OEM-style replacement or upgrade in rotating machinery.

This bearing sees use in electric motors, fans, pumps, compressors, and general industrial equipment where a 50 mm bore is required. The 110 mm outer diameter and 27 mm width place it in the 6310 series form factor, a widely specified size in commercial HVAC fan assemblies, blower motors, and light industrial drives. Its low-torque seal design is particularly useful in variable-speed and ECM motor applications where bearing drag directly affects efficiency and heat buildup.

Key Features

• Light contact rubber seals on both sides reduce rotational drag while blocking contaminants
• C3 radial clearance accommodates thermal expansion and interference-fit installations
• Deep-groove ball bearing geometry handles both radial and moderate axial loads
• 50 mm bore fits standard 6310-series motor and pump shaft applications
• Low-torque design supports efficient operation in variable-speed motor systems

Compatibility

Designed as an OEM-style replacement ball bearing for electric motors, blower assemblies, pumps, and rotating equipment requiring a 6310-series bearing with a 50 mm bore, 110 mm outer diameter, 27 mm width, double rubber seals, and C3 internal clearance.

Installation Notes

Bearing replacement should be performed by a qualified mechanic or technician. De-energize and lock out the equipment before removing the old bearing. Use a proper bearing puller and press or induction heater to remove and seat bearings without applying force through the rolling elements. Do not strike the bearing directly with a hammer, as this damages the races and seals.

Technical Specifications

• Bearing Type: Single-Row Deep-Groove Ball Bearing
• Bore Diameter: 50 mm
• Outer Diameter: 110 mm
• Width: 27 mm
• Seal Type: Light Contact Rubber Seal, Double-Sided
• Internal Clearance: C3

Standard Information

• Brand: KOYO
• Manufacturer Part Number: KOYO6310-2RDC3