691 Miniature Deep Groove Ball Bearing | 1x4x1.6 mm | High-Precision Micro Bearing

Specifically developed for compact spaces and high-speed operations, the 694-ZZ is a single-row miniature deep groove ball bearing equipped with double metal shields. With a 4 mm bore, 11 mm outer diameter, and a slim 4 mm profile, this micro-bearing is engineered to handle radial loads and light axial loads efficiently. The "ZZ" configuration means it is pre-lubricated with high-quality grease for life, offering excellent protection against dust and particle contamination while eliminating the need for periodic maintenance. Crafted from premium chrome steel, the 694-ZZ guarantees exceptional rotational accuracy and low friction for your most delicate mechanisms.

Engineered for micro-mechanics and assemblies with extreme space constraints, the 692-ZZ is an ultra-miniature single-row deep groove ball bearing. Featuring a microscopic 2 mm bore, a 6 mm outer diameter, and a 3 mm width, this precision component is designed to facilitate smooth rotational movement in the most compact devices. Fitted with double steel shields (ZZ), the bearing securely retains its internal lubrication while blocking microscopic dust and contaminants. Manufactured from premium-grade chrome steel, the 692-ZZ offers an exceptional balance of wear resistance, extremely low friction torque, and extended operational longevity for intricate mechanical systems.

The 691-2RS represents the pinnacle of miniaturization in rolling bearing technology. Designed for ultra-precision assemblies where installation space is extremely restricted, this single-row bearing features a 1 mm bore, 4 mm outer diameter, and a 1.6 mm width. The "2RS" designation indicates high-quality contact rubber seals on both sides, providing superior protection against moisture, fine dust, and environmental contaminants compared to shielded versions. Pre-filled with premium synthetic grease, the 691-2RS ensures stable, low-noise rotation for sensitive electronic and medical micro-devices.

The 691 is an ultra-small, single-row miniature ball bearing designed for high-precision instruments and compact mechanical assemblies. With a 1 mm bore, 4 mm outer diameter, and 1.6 mm width, this open-type bearing is engineered to provide minimal friction and high-speed stability in extremely confined spaces. Its open configuration allows for low-torque performance and the flexibility to use specific precision oils or greases depending on the application’s RPM requirements.

The 6905-2RS is a Double Rubber-Sealed Ultra-Thin Series Deep Groove Ball Bearing designed to deliver reliable performance in space-constrained applications that also require environmental protection. Fitted with two effective rubber contact seals (2RS), it guards against dust, moisture, and contaminants while retaining grease for extended service life. With a 25 mm bore and a slender 9 mm width, this bearing is an excellent choice for compact motors, gearboxes, actuators, and other light industrial or automotive mechanisms operating in potentially harsh conditions.

The 6908-2RS is a Double Rubber-Sealed Extra-Light Series Deep Groove Ball Bearing engineered for applications demanding minimal cross-section with reliable contamination protection. Featuring two rubber contact seals (2RS) on both sides, it effectively shields against dust, moisture, and fine particles while preserving internal lubrication. With a 40 mm bore and a slim 12 mm width, this bearing is an excellent choice for compact machinery, precision instruments, and light-duty drive systems where sealing integrity and space efficiency are equally important .

Engineered for compact rotary assemblies requiring maintenance-free operation and enhanced protection, the 695-2RS is a precision miniature ball bearing featuring a 5 mm bore, 13 mm outer diameter, and a 4 mm width. This model belongs to the 6900 series, renowned for its lightweight design and suitability for high-speed applications. The integrated dual rubber seals (2RS) provide an effective barrier against fine dust and moisture while retaining a precisely measured charge of high-speed lithium-based grease, ensuring consistent performance in space-constrained environments.

The 695-ZZ is a versatile metric miniature ball bearing engineered for mechanical systems requiring a balance of compact dimensions and reliable load capacity. Featuring dual metal shields (ZZ), this bearing provides effective protection against contamination while retaining the benefits of low-friction operation. With a 5mm bore, 13mm outer diameter, and 4mm width, it serves as a fundamental component for electric motors, automotive accessories, and precision desktop machinery.