R144-ZZ Shielded Miniature Deep Groove Ball Bearing for Precision Applications | 3.175×6.35×2.779 mm

The R144 Series is a precision miniature deep groove ball bearing, designed primarily to accommodate radial loads with the ability to support light axial loads in both directions. Characterized by its extremely compact dimensions, this bearing ensures smooth, low-friction rotation and high running accuracy. It is engineered for applications where space is at a premium and reliable performance is critical, making it ideal for small precision motors, sensitive instruments, medical devices, and miniature drive systems.

The R144-ZZ is a Double Metal Shielded Miniature Deep Groove Ball Bearing engineered for high-speed precision equipment where low friction and reliable operation are essential. Fitted with two non-contact metal shields (ZZ) on both sides, it provides effective protection against dust and larger particles while maintaining minimal torque and allowing high rotational speeds. With a 3.175 mm bore and ultra-compact cross-section, this bearing is ideal for small motors, instrumentation, robotics, and miniature drives operating in clean environments.

The R24-2RS is an inch-sized single-row deep groove ball bearing engineered for applications requiring inch-dimension components with metric-equivalent performance. With a 1.5-inch (38.1 mm) bore, 2.625-inch (66.675 mm) outer diameter, and 0.5625-inch (14.288 mm) width, this bearing delivers reliable radial and light axial load capacity in a compact form factor . Featuring double rubber seals (2RS) on both sides, it provides effective protection against dust, moisture, and contaminants while retaining lubricant for extended maintenance intervals . This bearing is commonly specified for small electric motors, conveyor rollers, agricultural equipment, and various industrial machinery where inch-dimension components are preferred .

The R188-ZZ is a precision miniature ball bearing featuring inch-dimensional specifications, engineered for compact mechanisms requiring smooth operation at high rotational speeds. Featuring double metal shields (ZZ), this miniature bearing provides effective protection against contaminant ingress while maintaining grease retention in space-constrained assemblies. With a 6.35mm bore (1/4 inch), 12.7mm outer diameter (1/2 inch), and 3.175mm width (1/8 inch), it serves as the ideal solution for RC hobby applications, dental handpieces, 3D printer components, and precision rollers where consistent performance under light loads is essential.

The R188-2RS is a precision sealed miniature ball bearing featuring inch-dimensional specifications, engineered for mechanisms requiring enhanced protection against moisture and fine contaminants. Featuring double contact rubber seals (2RS), this miniature bearing provides superior defense against liquid ingress and particulate contamination while retaining lubricating grease in space-constrained assemblies. With a 6.35mm bore (1/4 inch), 12.7mm outer diameter (1/2 inch), and 4.763mm width (3/16 inch), it serves as the ideal solution for food processing equipment, medical devices, laboratory instruments, and outdoor RC applications where exposure to moisture or washdown procedures is common.