623-ZZ Miniature Deep Groove Ball Bearing | 3×10×4 mm for 3D Printers & Precision Micro-Motors

The 6215 is a high-precision single-row radial bearing designed for larger industrial shafts requiring a combination of high-speed capability and significant radial load support. With a 75 mm bore, 130 mm outer diameter, and 25 mm width, this open-type bearing is a cornerstone component in heavy-duty machinery. Its open architecture allows for seamless integration into oil-bath or circulating lubrication systems, ensuring optimal heat dissipation and minimal friction torque during continuous operation.

The 6215-ZZ is a robust, medium-series deep groove ball bearing engineered to handle significant radial and axial loads in demanding industrial environments. Equipped with dual-sided metal shields (ZZ), this bearing provides an effective barrier against dust and metallic particles while retaining high-quality internal lubrication. With a 75 mm bore and a reinforced 25 mm width, the 6215-ZZ is the preferred choice for heavy-duty electric motors, agricultural machinery, and power transmission systems requiring long-term operational stability.

The S6203-2RS is a premium, single-row deep groove ball bearing engineered specifically for harsh, corrosive environments. Manufactured from high-grade stainless steel rather than standard chrome steel, this bearing provides exceptional resistance to rust, moisture, and chemical exposure. Featuring dual Nitrile Butadiene Rubber (NBR) seals, it securely locks in high-quality grease while keeping out water and particulate matter. With standardized dimensions of a 17mm bore, 40mm outer diameter, and 12mm width, the S6203-2RS delivers a reliable, long-lasting solution for washdown and outdoor applications.

The 6215-2RS is a robust, premium-grade single-row deep groove ball bearing engineered to deliver unyielding reliability in demanding industrial environments. Unlike open or metal-shielded variants, this model is equipped with dual contact rubber seals (2RS) that create a formidable barrier against moisture, dirt, and heavy particulate contamination while permanently retaining the factory-applied lubricant. Manufactured to precise metric dimensions—featuring a 75 mm bore, 130 mm outer diameter, and 25 mm width—the 6215-2RS offers an optimal balance of high radial load capacity and steadfast durability for large-scale machinery, heavy electric motors, and agricultural equipment.

The 6207-2RS is a premium-grade, single-row deep groove ball bearing engineered to deliver robust performance and exceptional load support in demanding industrial environments. Unlike low-friction metal-shielded variants, this model is equipped with dual nitrile rubber contact seals (2RS) that create a tight, physical barrier against moisture, dirt, and heavy abrasives while securely locking in the factory grease. Featuring standard metric dimensions—a 35 mm bore, 72 mm outer diameter, and 17 mm width—the 6207-2RS serves as an essential mechanical component for electric motors, agricultural equipment, and heavy-duty transmission systems.

The 629-ZZ is a premium-grade miniature radial ball bearing engineered for applications that demand high rotational speeds, minimal friction, and reliable debris protection. Encased with dual pressed-steel shields (ZZ), this bearing effectively retains internal lubrication while preventing the entry of larger particulates. Featuring a versatile 9mm inner bore, a 26mm outer diameter, and an 8mm width, the 629-ZZ is the component of choice for handheld power tools, high-performance hobby mechanics, and automated manufacturing systems requiring exceptionally smooth continuous rotation.

The 626 Open is a high-precision miniature radial ball bearing designed for internal machinery applications where external contamination is not a factor. Manufactured without shields or rubber seals, this unshielded bearing provides completely unrestricted access to the balls and raceways. This open architecture makes it the ultimate choice for enclosed systems that utilize continuous oil bath or oil mist lubrication. With a 6mm bore, a 19mm outer diameter, and a 6mm width, it delivers absolute minimum rolling resistance and exceptional heat dissipation.

The 623-ZZ is an ultra-compact, high-precision miniature ball bearing engineered for micro-mechanical systems where space is strictly limited but high-speed performance is essential. Outfitted with twin pressed steel shields (ZZ) to safely retain high-grade lubricant and deflect micro-debris, this bearing delivers exceptionally low rotational resistance. With a tiny 3mm bore, a 10mm outer diameter, and a 4mm width, the 623-ZZ is the definitive solution for 3D printer extruders, micro-scale drone motors, and delicate instrumentation requiring frictionless, ultra-smooth movement.