Rollway Bearings 6308ZZC3EMQ Bearing

The Rollway Bearings 6308ZZC3EMQ is a high-performance 40mm deep groove ball bearing engineered for heavy-duty HVACR and industrial motor applications. This single-row radial bearing features a 90mm outer diameter and a 23mm width, providing robust support for both radial and axial loads in high-speed environments. Designed with a C3 internal clearance, this unit allows for thermal expansion during continuous operation, preventing premature fatigue in high-heat scenarios common in blower motors and pump assemblies. The double shielded (ZZ) configuration utilizes metal plates to retain high-quality grease while effectively excluding large contaminants, ensuring low-friction operation and extended service life. As an Electric Motor Quality (EMQ) rated component, it meets rigorous standards for noise and vibration reduction, making it an ideal choice for contractors looking for a direct replacement for 6308-2Z or standard 6308ZZ bearings. Integrating this precision-ground bearing ensures reliable shaft alignment and system efficiency.

• Electric Motor Quality (EMQ): Specifically tested for low-noise and low-vibration performance in sensitive motor applications.
• C3 Radial Clearance: Optimized for high-speed equipment where thermal growth is expected, preventing internal binding.
• Dual Metal Shields: Protects the internal raceway from debris while maintaining lubrication in harsh mechanical rooms.
• Interchangeable Design: Serves as a drop-in technical substitute for 6308-2Z and standard 6308ZZ series units.
• Durable Construction: High-carbon chromium steel provides the structural integrity required for industrial HVAC duty cycles.

Common HVACR Technical Questions

Does this bearing require manual lubrication upon installation?
No, the Rollway 6308ZZC3EMQ comes pre-lubricated from the factory. The dual metal shields are designed to retain the internal grease charge for the duration of the bearing's service life in standard operating conditions.

What is the benefit of C3 clearance over standard clearance?
A C3 internal clearance provides more room between the balls and the races than a standard "Normal" fit. This is critical for HVAC motors where the shaft may heat up more rapidly than the housing, allowing the bearing to operate without seizing due to thermal expansion.

Can this bearing be used in vertical shaft applications?
Yes, this deep groove ball bearing is capable of handling moderate thrust loads in addition to radial loads, making it suitable for both horizontal and vertical motor mounting configurations.

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.