Couplers & Bearing 6311-2RS Sealed Bearing

As a veteran tech, I know you need a 6311-2RS Sealed Bearing that can handle the grit of a mechanical room without failing. This deep groove ball bearing is a standard workhorse for HVAC blower motors and heavy-duty industrial pump applications, featuring a 55mm bore, 120mm outer diameter, and a 29mm width. The dual rubber seals (2RS) provide a critical contact barrier, locking in the high-temperature Chevron SRI-2 grease while locking out the dust and moisture that kill open bearings. Designed to manage both heavy radial and axial loads, this chrome steel component operates at limiting speeds up to 3,800 RPM, making it ideal for the high-torque demands of electric motor repair. When you are swapping out a noisy unit, the 6311-2RS1 or 6311-2NSE interchange ensures you are getting a precision part that drops right onto the shaft with the correct C3 internal clearance for thermal expansion.

• Dual-Sided Rubber Seals: Provides superior grease retention and protection against contaminants in harsh mechanical environments.
• High Load Capacity: Engineered for heavy radial and axial loads, with a dynamic load rating up to 74.1 kN.
• Precision Tolerance: Optimized for low noise and minimal vibration in commercial HVAC systems.
• Pre-Lubricated Design: Factory-packed with high-grade grease for immediate installation in pumps and conveyors.

What equipment uses the 6311-2RS bearing?
This part is a common fit for large electric motors, centrifugal pumps, industrial fans, and agricultural machinery where an airtight seal is required to protect the raceways.

Can I use this in high-temperature applications?
Yes, the synthetic rubber seals and specialized lubrication enable stable operation in ambient temperatures ranging from -30°C to +110°C.

How does 2RS compare to ZZ shielding?
The 2RS rubber seals offer better protection against liquid and fine particulates than metal shields (ZZ), making them the preferred choice for dirty or damp environments.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.