6708-2RS Sealed Deep Groove Ball Bearing For Compact Applications | 40×50×6 Mm
The 6708-2RS is an Extra-Thin, Double Rubber-Sealed Deep Groove Ball Bearing designed for applications where space is at an absolute premium. Featuring a unique extremely slim cross-section (6 mm width) and a relatively large 40 mm bore, this bearing provides a compact rolling solution for mechanisms requiring low frictional torque and reliable sealing. Equipped with two contact rubber seals (2RS) , it provides superior protection against moisture and fine contaminants, ensuring long-term, maintenance-free operation in precision instruments and light-duty systems.
6708-2RS Deep Groove Ball Bearing 40×50×6 mm | ISO 6700 Series | Double Shielded
Engineered specifically for thin-section applications, this sealed bearing utilizes a miniature deep groove geometry to handle light radial and axial loads in both directions. It is optimized for speeds up to 6,500 r/min (Grease), offering a durable solution for equipment where shaft rigidity is required but housing space is constrained.

Suited for precision instruments and space-constrained rotating components requiring sealed-for-life performance:
Manufactured from high-purity chrome steel (GCr15), this bearing features a 6 mm width while maintaining a large 40 mm inner diameter. This "thin-section" design allows for significant downsizing of housings and shafts without compromising rotational stability.
The double rubber seals (2RS) are manufactured from synthetic rubber (NBR) and lightly contact the inner ring. This provides a labyrinth-like barrier that permanently retains the factory-applied grease while preventing ingress of dust and moisture, effectively creating a "lubricated for life" component.
The miniature balls and precision-ground raceways are manufactured to strict vibration standards. This ensures exceptionally quiet operation and low vibration levels, which is critical for medical and office automation equipment where noise pollution is a primary concern.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 6700 Series – Extra Thin Section |
| Basic Designation | 6708 |
| Suffix | 2RS (Double Contact Rubber Seals) |
| Bore Diameter (d) | 40 mm |
| Outer Diameter (D) | 50 mm |
| Width (B) | 6 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | Standard / P5 Grade Available |
| Cage Material | Pressed Steel or Polyamide (depending on version) |
| Dynamic Load Rating (Cʳ) | 4.36 kN |
| Static Load Rating (C₀ʳ) | 4.05 kN |
| Limiting Speed (Grease) | 4,300 r/min |
| Limiting Speed (Oil) | 5,000 r/min |
| Weight (approx.) | 0.028 kg |
Common manufacturer equivalents include:
The 6708-2RS comes standard with double rubber seals, making it the preferred choice for applications requiring "fit and forget" reliability in environments with fine dust or incidental moisture exposure. For applications requiring the absolute lowest possible torque, a metal-shielded version (6708-ZZ) is available as an alternative, though it offers less contaminant resistance.
"Where space is the constraint and reliability is the requirement, the 6708-2RS delivers precision performance in an ultra-compact form factor, ideal for medical, automation, and light industrial drives."
The 673-ZZ is a compact and lightweight miniature deep groove ball bearing engineered for precision applications where space is limited and reliability is paramount. Featuring double metal shields (ZZ) , this miniature bearing provides effective protection against dust ingress and ensures the retention of lubricating grease in confined assemblies. With a 3mm bore, 6mm outer diameter, and 2.5mm width, it is the ideal solution for small electric motors, dental handpieces, 3D printer components, and radio-controlled models where smooth, consistent operation under light loads is required.
Details
The 6708-2RS is an Extra-Thin, Double Rubber-Sealed Deep Groove Ball Bearing designed for applications where space is at an absolute premium. Featuring a unique extremely slim cross-section (6 mm width) and a relatively large 40 mm bore, this bearing provides a compact rolling solution for mechanisms requiring low frictional torque and reliable sealing. Equipped with two contact rubber seals (2RS) , it provides superior protection against moisture and fine contaminants, ensuring long-term, maintenance-free operation in precision instruments and light-duty systems.
Details
The 6709-2RS is an Extra-Thin Section, Double Rubber-Sealed Deep Groove Ball Bearing engineered for applications requiring minimal weight and compact axial space. Featuring an ultra-narrow 6 mm cross-section paired with a 45 mm bore, this bearing delivers reliable rotational support where traditional bearings cannot fit. Equipped with two non-removable rubber contact seals (2RS) , it provides lifelong grease retention and effective exclusion of dust and moisture, ensuring maintenance-free operation in precision instruments and light industrial drives .
Details
The 6709-ZZ is a precision Thin Section Deep Groove Ball Bearing designed for applications where space is limited and weight reduction is critical. Featuring a double shielded design (ZZ) with pressed steel covers on both sides, it effectively retains grease and excludes light contamination while maintaining minimal rotational torque. With its ultra-slim 45x55x6 mm cross-section, this bearing is engineered for compact mechanical and electromechanical systems .
Details
The 6710-2RS is a precision Thin Section Deep Groove Ball Bearing engineered for applications demanding minimal radial space and enhanced protection. Featuring a double contact rubber seal (2RS) on both sides, it provides superior exclusion of moisture, dust, and fine contaminants while retaining lubricant for extended maintenance-free operation. With its ultra-slim 50x62x6 mm cross-section, this bearing is ideal for compact industrial drives, medical devices, and automation equipment .
Details
Engineered specifically for restricted-space environments, the 6710-ZZ is an ultra-thin section deep groove ball bearing that delivers uncompromising precision without unnecessary bulk. Equipped with dual non-contact metal shields (ZZ), this bearing effectively blocks particulate contamination while permanently retaining its high-quality factory lubrication. Featuring a large 50mm bore, a 62mm outer diameter, and a remarkably slim 6mm width, it is the ultimate solution for robotics, optical equipment, and industrial automation assemblies where weight reduction and tight radial clearances are critical.
Details
The 6711-2RS is a high-performance, extra-light metric bearing designed for applications where radial space is at a premium and environmental protection is a necessity. Featuring contact rubber seals (2RS) on both sides, this thin-section bearing provides a superior barrier against moisture, dust, and fine particulates compared to shielded versions. With a 55mm bore and a slim 7mm width, it offers a perfect balance of large-diameter shaft support and a minimalist mounting footprint, making it indispensable for modern automated machinery.
Details
The 6711-ZZ is a specialized thin-section radial bearing engineered for high-speed rotation where space efficiency is a primary design requirement. Featuring dual non-contact metal shields (ZZ), this bearing provides a robust barrier against dust and debris while maintaining the lowest possible rotational friction. With a 55mm bore diameter and a slim 7mm width, it is the premier choice for large-diameter shafting in robotics, optical instruments, and precision automation where thermal buildup must be kept to a minimum.
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