Deep Groove Ball Bearings Ball Bearings Series Specifications & Uses

R22-2RS Deep Groove Ball Bearing | Inch Series | Double Rubber Seals | 1-3/8" × 2-1/2" × 9/16"mm
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.

Hot Tags : R22-2RS inch series sealed deep groove ball bearing 1-3/8 bore sealed ball bearing 2RS Double rubber seal ball bearing 34.925x63.5x14.288 R Series inch sealed bearing grease lubricated R22-2RS bearing for pump and agricultural equipment R22-2RS replacement bearing for conveyor and textile machinery
Read More
R22 Open Inch Series Deep Groove Ball Bearing For High-Speed Motor | 34.925 × 63.5 × 11.112 mm
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.

Hot Tags : R22 open inch series deep groove ball bearing 1-3/8 bore open ball bearing grease oil lubricated Unshielded ball bearing 34.925x63.5x11.112 R Series inch open bearing 13000 RPM R22 open bearing for gearbox and high-speed motor R22 open bearing ABMA Conrad-type replacement
Read More
R22-ZZ Inch Series Double-Shielded Deep Groove Ball Bearing | 1-3/8" × 2-1/2" × 9/16"
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.

Hot Tags : R22-ZZ inch series deep groove ball bearing 1-3/8 bore ball bearing ZZ shielded Double steel shield ball bearing 34.925x63.5x14.288 NACHI R22ZZ equivalent bearing R22ZZ shielded bearing for conveyor and agricultural equipment R Series inch ball bearing double shield
Read More
R3-ZZ Miniature Shielded Ball Bearing | High-Speed Low-Friction Metal Shield Performance | 4.762×12.700×4.978 mm (3/16×1/2×0.196 in)
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.

Hot Tags : 3/16x1/2x0.196 Inch Bearing High Speed RC Motor Bearing R3-ZZ Miniature Ball Bearing Low Friction Miniature Bearing Double Metal Shielded R3 Bearing Welink R3ZZ Precision Bearing
Read More
R2-5 Open Inch Series Miniature Ball Bearing | Ultra-Low Friction & High-Speed Dynamics | 3.175×7.938×2.779mm
The R2-5 Open is a precision-engineered, inch-dimensional miniature deep groove ball bearing developed specifically for applications demanding absolute minimum rotational resistance. With a standard 1/8" bore diameter, this bearing utilizes an entirely unshielded (open) architecture. By eliminating the physical barriers of shields or rubber seals, the R2-5 Open achieves a zero-contact environment that eradicates frictional drag. This design is highly favored for mechanisms housed within clean, enclosed environments or oil-bath systems, where maximum RPM and rapid heat dissipation are critical for system performance.

Hot Tags : R2-5 Open Bearing Low Torque Ball Bearing Unshielded Miniature Bearing SAE 52100 Chrome Steel Bearing 1/8" Inch Series Bearing NMB RI-518 Equivalent
Read More
R2-5-2RS Inch Series Miniature Ball Bearing | Sealed Contamination Defense | 3.175×7.938×3.571mm
The R2-5-2RS is a highly resilient inch-series miniature deep groove ball bearing engineered to deliver reliable rotation in environments prone to dust and moisture. Featuring a standard 1/8" inner diameter, this micro bearing is equipped with dual contact rubber seals (2RS) crafted from durable NBR (Nitrile Butadiene Rubber). Unlike standard metal shields, these contact seals create a physical barrier against external particle ingress and fluid splashes. This heavily shielded architecture effectively locks in premium factory grease while preventing abrasive contaminants from reaching the raceways, making the R2-5-2RS an essential component for demanding outdoor applications and exposed micro-mechanisms.

Hot Tags : R2-5-2RS Sealed Bearing SAE 52100 Chrome Steel Bearing 1/8" Bore Miniature Bearing R2-5DDU Equivalent Rubber Sealed Micro Bearing RC Car Wheel Bearing
Read More
R2-5-ZZ Inch Series Miniature Ball Bearing | High-Performance Precision | 3.175×7.938×3.571mm
The R2-5-ZZ is a precision-engineered, inch-series miniature deep groove ball bearing designed for applications where rotational stability and radial clearance control are paramount. With a 1/8" bore diameter, this model is slightly more robust than the ultra-micro series, offering a balanced power-to-size ratio. It is equipped with dual metallic shields (ZZ) that provide a physical barrier against workplace debris while maintaining a non-contact interface with the inner ring to prevent friction-induced heat. This specialized construction ensures the R2-5-ZZ remains the preferred choice for high-speed micro-motors and sensitive transmission systems.

Hot Tags : R2-5-ZZ Inch Bearing R2-5ZZ Chrome Steel Bearing 1/8 Bore Miniature Bearing NMB RI-518ZZ Equivalent High Speed 50000 RPM Bearing Micro Motor Precision Bearing
Read More
R2-6-2RS Sealed Miniature Ball Bearing | Moisture & Dust Protection | 3.175 × 9.525 × 3.967 mm
The R2-6-2RS is a high-performance imperial miniature bearing specifically engineered for environments where exposure to moisture, dust, or fine particulates is a concern. Featuring a dual-contact rubber seal ("2RS") design, this bearing provides a superior airtight enclosure compared to metal shields. The synthetic rubber seals are reinforced with steel inserts, ensuring that the factory-applied grease remains securely inside the raceways while effectively blocking external contaminants. With a standard 1/8-inch bore and a 3/8-inch outer diameter, the R2-6-2RS is the ideal choice for outdoor equipment, small power tools, and high-precision mechanical assemblies operating in demanding conditions.

Hot Tags : 3.175×9.525×3.967 mm Bearing High Performance R2-6 Bearing R2-6-2RS Sealed Bearing GCr15 Precision R2-6-2RS 1/8 Inch Bore Rubber Sealed Bearing 1/8" Shaft Miniature Bearing
Read More
R2-6-ZZ Shielded Deep Groove Ball Bearing | High-Stability Miniature Rotation | 3.175 × 9.525 × 3.967 mm
The R2-6-ZZ is a high-performance miniature imperial ball bearing engineered for applications that require a balance of compact sizing and enhanced structural rigidity. Featuring dual metal shields (ZZ), this bearing is designed to retain high-speed lubricant while providing a robust physical barrier against larger contaminants and debris. With its 1/8-inch bore and a wider-profile 5/32-inch width, the R2-6-ZZ offers superior radial load support compared to ultra-slim variants, making it ideal for precision motors and mechanical drive systems.

Hot Tags : R2-6-ZZ Shielded Bearing GCr15 Chrome Steel R2-6ZZ 1/8 Inch Bore Miniature Bearing High Speed RI-618ZZ Bearing Double Metal Shield R2-6 Bearing Precision 1/8x3/8x5/32 Bearing
Read More
R2A-ZZ Shielded Miniature Ball Bearing | Heavy-Duty Micro Rotation | 3.175 × 12.7 × 4.366 mm
The R2A-ZZ is a specialized imperial miniature ball bearing designed for applications that require a small 1/8-inch bore but demand higher load-bearing stability than standard micro-bearings. Featuring an exceptionally robust 1/2-inch outer diameter relative to its bore size, the R2A-ZZ offers enhanced structural rigidity and radial strength. The double-shielded ("ZZ") configuration utilizes two non-contact metal plates to retain high-performance lubricant while acting as a barrier against dust and environmental contaminants, making it a reliable choice for high-speed, maintenance-free operation.

Hot Tags : 3.175×12.7×4.366 mm Bearing High Speed R2A-ZZ Ball Bearing R2A-ZZ Shielded Bearing GCr15 Chrome Steel R2A Bearing 1/8 Inch Bore Precision Bearing Precision Inch Series Miniature Bearing
Read More
R155-2RS Sealed Deep Groove Ball Bearing | Precision Shielded Micro Rotation | 3.967 × 7.938 × 3.175 mm
The R155-2RS is a high-performance miniature imperial ball bearing engineered for specialized applications requiring a contaminant-free environment within a compact footprint. Featuring dual-sided Nitrile Rubber (2RS) contact seals, this bearing provides an exceptional barrier against dust, moisture, and fine particulates while ensuring excellent grease retention. Designed for 5/32-inch shafts, the R155-2RS is a vital component for high-precision instruments and micro-mechanisms where long-term reliability and zero maintenance are paramount.

Hot Tags : R155-2RS Sealed Bearing 5/32 Inch Miniature Ball Bearing Double Rubber Seal R155 Bearing GCr15 Chrome Steel R155DDU High Speed 5/32x5/16 Bearing Precision RI-5532DD Bearing
Read More
R155-ZZ Shielded Miniature Ball Bearing | 5/32" Bore Precision | 3.967 × 7.938 × 3.175 mm
The R155-ZZ is a precision-engineered imperial miniature ball bearing specifically developed for applications requiring a 5/32-inch shaft interface. Featuring a dual-shielded ("ZZ") construction, this model provides a robust defense against dust and debris, ensuring the internal raceways remain clean and well-lubricated. This enclosed design makes the R155-ZZ an ideal, "set-and-forget" component for high-speed micro-motors, precision encoders, and small-scale mechanical linkages where reliability and low-maintenance operation are paramount.

Hot Tags : 3.967×7.938×3.175 mm Bearing High Speed Miniature R155ZZ R155-ZZ Shielded Bearing Precision GCr15 R155 Bearing 5/32 Inch Bore Ball Bearing 5/32" Imperial Series Bearing
Read More