R8-2RS Premium Sealed Ball Bearing for Electric Motors & Power Equipment | 1/2" × 1-1/8" × 5/16"

The R3-ZZ is a high-precision, double-shielded single-row miniature ball bearing engineered for exceptional rotational performance in applications where low starting torque and high speeds are critical. Unlike contact rubber seals, this model features dual non-contact pressed steel shields (ZZ) that effectively retain the factory grease and block larger dust particles without generating additional frictional resistance. Designed with fractional inch dimensions—a 3/16-inch bore, 1/2-inch outer diameter, and 0.196-inch width—the R3-ZZ provides a perfect mechanical solution for compact devices, micro-motors, and high-frequency appliances.

The R22-ZZ is a single-row inch-series deep groove ball bearing fitted with double pressed-steel shields (ZZ), purpose-built for applications where reliable dust exclusion and low-maintenance operation are priorities. With a 1-3/8" (34.925 mm) bore, 2-1/2" (63.5 mm) outer diameter, and 9/16" (14.288 mm) width, it serves as a direct-fit solution across North American inch-dimensioned machinery platforms. The metal-shield configuration keeps friction torque lower than rubber-sealed equivalents, making this bearing a preferred selection for higher-speed assemblies including motors, textile drives, CNC spindles, conveyor roller heads, and agricultural equipment where light contamination protection is needed without sacrificing rotational performance.

The R22 is the base open configuration of the R-series inch-dimensioned Conrad-type ball bearing, offered without shields or seals for applications where lubrication access, higher operating speeds, or field-selectable lubricants take priority over self-contained contamination protection. With a 1-3/8" (34.925 mm) bore, 2-1/2" (63.5 mm) outer diameter, and 7/16" (11.112 mm) width — notably slimmer than the shielded R22-ZZ or sealed R22-2RS variants — the open design is the preferred fit for enclosed gearboxes, oil-bath housings, clean-environment motor shafts, and any application where lubrication is managed externally by the machine's own system. It ships without grease and accepts both oil and grease lubrication, giving maintenance engineers full control over lubricant type and repack intervals.

The R22-2RS is a single-row, inch-dimensioned deep groove ball bearing sealed on both sides with contact rubber seals, designed for operation in environments where contamination control and lubricant retention are the primary concerns. Sharing the same 1-3/8" (34.925 mm) bore, 2-1/2" (63.5 mm) outer diameter, and 9/16" (14.288 mm) width as the R22 family, the 2RS variant distinguishes itself through its contact-lip rubber seal design, which actively wipes against the inner ring to block dust, moisture, and fine particles from reaching the raceway. Factory pre-greased and permanently sealed, it is suited for pump drives, agricultural machinery, textile equipment, packaging lines, and any inch-shaft application where re-lubrication access is limited or impractical.

Engineered for applications requiring reliable performance in environments prone to dust and moisture, the R10-2RS is a premium inch-series deep groove ball bearing. Featuring dual contact rubber seals (2RS), it excels in locking out particulate matter and liquid contaminants while securely retaining essential factory lubrication. Because these rubber seals make direct contact with the inner ring, the R10-2RS delivers superior environmental protection compared to shielded variants, making it the premier choice for 5/8-inch bore applications like electric motors, agricultural equipment, and heavy-duty power tools.

Designed specifically for machinery that operates in harsh, contamination-prone environments, the R8-2RS is a highly durable inch-series deep groove ball bearing. Equipped with twin nitrile rubber (NBR) contact seals on both sides, this model creates a physical barrier against moisture, dirt, and abrasive particles while securely locking in the factory-applied grease. Unlike shielded variations, the tight contact seal of the R8-2RS prioritizes ultimate internal protection and longevity, making it the go-to solution for 1/2-inch shaft applications such as lawn and garden equipment, go-karts, electric motor stators, and mobility devices.

Designed for precision mechanical systems requiring a compact footprint and reliable high-speed capabilities, the R6-ZZ is a premium inch-series deep groove ball bearing. Equipped with dual metallic shields (ZZ), it actively deflects particulate matter and debris while successfully retaining essential factory lubrication. Because these steel shields maintain a microscopic clearance from the inner ring, the R6-ZZ ensures remarkably low friction and minimal starting torque compared to rubber-sealed alternatives. This makes it an exceptional choice for 3/8-inch bore applications such as small power tools, robotics, and high-RPM fractional horsepower motors.

Engineered to deliver unwavering stability in environments exposed to dust, dirt, and moisture, the R6-2RS is a premium inch-dimensioned radial ball bearing. Fortified with two synthetic rubber contact seals (2RS), this component effectively blocks external contaminants from entering the raceways while retaining critical lubricating grease. Because the flexible seal lips maintain light, constant contact with the inner ring, the R6-2RS offers vastly superior ingress protection compared to metal-shielded designs. This makes it an essential choice for 3/8-inch shaft assemblies found in fractional horsepower motors, lawn equipment, and automated conveyor systems.