Skf 61904 Thin Section Ball Bearing 20mm Bore Open

Product Description

The SKF 61904 is a single-row, open-style thin section ball bearing designed for applications where radial space is limited and precise rotational performance is required. With a 20 mm bore diameter, 37 mm outside diameter, and 9 mm overall width, this bearing fits compact shaft and housing configurations common in light industrial machinery, HVAC blower assemblies, and rotating equipment. It carries a dynamic load capacity of 1,430 pounds and a static load capacity of 821 pounds, with a maximum rated speed of 26,000 RPM. The steel cage construction and open design make it well suited for clean, lubricated environments where external sealing is handled by the application housing.

The SKF 61904 is used in a wide range of mechanical applications requiring a compact, high-speed radial bearing. Typical installations include electric motors, small pumps, fans, and precision rotating assemblies in both residential and light commercial equipment. The open configuration allows for shop-applied lubrication at install time and is appropriate where the bearing operates in a controlled or enclosed housing that provides adequate contamination protection. Installers working with rotating equipment in HVAC, pump, or general mechanical service will find this bearing a standard dimensional replacement in the 61904 series.

Key Features

• 20 mm bore diameter with round bore geometry for standard shaft fitment
• 37 mm outside diameter and 9 mm width for compact radial envelope
• 1,430 pound dynamic load capacity and 821 pound static load capacity
• 26,000 RPM maximum rated speed suits high-speed rotating equipment
• Steel cage construction for durability in lubricated environments
• Open design without flange or snap ring for straightforward housing installation
• Conforms to ISO 15 dimensional standards

Compatibility

Designed as an OEM-style replacement for applications requiring a Series 61904 single-row thin section ball bearing with a 20 mm bore, 37 mm outside diameter, and 9 mm width per ISO 15 standards.

Installation Notes

Installation should be performed by a qualified mechanic or equipment technician familiar with bearing press-fit procedures. Always de-energize and lock out the equipment before removing or installing bearings. Use a proper bearing press or driver tool that applies force only to the press-fit ring to avoid damaging the races or cage. The open design requires adequate lubrication applied to the bearing prior to or at the time of installation.