6908-2RS Sealed Deep Groove Ball Bearing for Thin-Section Applications & Precision Drives | 40×62×12 Mm
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 .
6908-2RS Deep Groove Ball Bearing 40×62×12 mm | ISO 69 Series – Extra Light | Double Rubber Sealed
Built on a thin-section deep groove geometry, this sealed bearing delivers quiet and stable performance at speeds up to 11,000 r/min (Grease). It accommodates light to moderate radial loads and limited axial loads, making it particularly suitable for applications in automation equipment, medical devices, and industrial robotics where environmental resistance and extended service life are required in confined spaces .

Ideal for compact and precision-oriented designs across multiple sectors where sealing reliability and minimal cross-section are critical:
With dimensions of 40×62×12mm, this extra-light series bearing features minimized ring cross-sections, making it ideal for applications with strict radial space limitations while maintaining reliable load support.
Precision-engineered chrome steel raceways and balls, combined with optimized internal clearance, ensure quiet running with minimal vibration across various operating speeds.
Integrated rubber contact seals on both sides provide dependable protection against contaminants and moisture, significantly extending bearing life in challenging or dirty environments.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 69 Series – Extra Light |
| Basic Designation | 6908 |
| Suffix | 2RS (Double Rubber Contact Seals) |
| Bore Diameter (d) | 40 mm |
| Outer Diameter (D) | 62 mm |
| Width (B) | 12 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | Standard (P0 / ABEC 1); P5/P6 Grades Available |
| Cage Material | Stamped Steel |
| Dynamic Load Rating (Cʳ) | 12.2 kN |
| Static Load Rating (C₀ʳ) | 8.9 kN |
| Limiting Speed (Grease) | 11,000 r/min |
| Limiting Speed (Oil) | — |
| Weight (approx.) | 110 g |
Common manufacturer equivalents include:
The 6908-2RS features double rubber contact seals, making it well-suited for environments exposed to light contaminants and humidity. For applications requiring even higher speeds or different sealing options, the double shielded variant (6908-ZZ) or open version (6908) may be considered as alternatives.
"A preferred choice for compact motor designs, precision automation, and medical devices, the 6908-2RS delivers effective sealing and dependable performance where space constraints and protection requirements are equally demanding."
The 698-ZZ is a Durable Miniature Deep Groove Ball Bearing designed for applications that require a robust yet compact bearing solution with built-in contamination resistance. Featuring double steel shields (ZZ), it provides effective two-side sealing against dust and airborne particles while ensuring smooth, low-friction performance. With an 8 mm bore, 19 mm outer diameter, and a 6 mm width, this bearing is well-suited for small industrial motors, geared mechanisms, and electromechanical devices where reliable operation in varied environments is essential.
Details
The 699-2RS is a Double Rubber-Sealed Miniature Deep Groove Ball Bearing designed for compact, high-reliability applications where protection against moisture and fine contaminants is essential. With two rubber contact seals (2RS) on both sides, this bearing provides superior sealing performance, retaining lubrication and preventing ingress of dust, dirt, and fluids. Featuring a 9mm bore and an ultra-light cross-section, it is ideal for sensitive precision instruments, small motors, and devices operating in challenging environments where space is limited and cleanliness is critical.
Details
The 6901-2RS is a Double Rubber-Sealed Ultra-Thin Section Deep Groove Ball Bearing designed for space-sensitive applications requiring reliable sealing and low-profile design. Equipped with two rubber contact seals (2RS), it effectively shields against dust, moisture, and contaminants while retaining grease for extended service. Featuring a 12 mm bore and an exceptionally slim 6 mm width, this bearing is ideal for small motors, precision instruments, and compact mechanisms where axial space is limited.
Details
The 6902-ZZ is a Double Metal-Shielded Ultra-Thin Series Deep Groove Ball Bearing engineered for applications demanding a slim profile, high rotational speeds, and effective dust protection. Featuring two non-contact steel shields (ZZ) on both sides, it guards against dry contaminants while minimizing friction and heat generation. With a 15 mm bore and an exceptionally low 7 mm cross-section, this bearing is perfectly suited for small motors, precision spindles, and space-constrained devices where reliable high-speed performance is essential.
Details
The 6903-2RS is a Double Rubber-Sealed Ultra-Thin Series Deep Groove Ball Bearing designed for applications where space constraints and environmental protection are equally critical. Equipped with two effective rubber contact seals (2RS), it provides reliable defense against dust, moisture, and fine contaminants while retaining lubrication. Featuring a 17 mm bore and a slim 7 mm width, this bearing is an excellent choice for compact motors, precision instruments, and small mechanisms operating in potentially contaminated or humid conditions.
Details
The 6904-2RS is a Double Rubber-Sealed Ultra-Thin Deep Groove Ball Bearing engineered for applications requiring a slender profile along with reliable contamination protection. Fitted with two rubber contact seals (2RS) on both sides, it effectively shields against dust, moisture, and fine particles while maintaining internal lubrication. With a 20 mm bore and a slim 9 mm width, this bearing offers an ideal solution for compact motors, precision equipment, and small devices where space savings and environmental sealing are essential.
Details
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.
Details
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 .
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