686-2RS Sealed Deep Groove Ball Bearing | Precision Metric Miniature Series | 6×13×5 mm
The 686-2RS is a high-performance miniature ball bearing engineered for versatility and durability in compact mechanical assemblies. Featuring a 6mm bore and 13mm outer diameter, this model is equipped with dual-contact rubber seals (2RS) that provide an airtight defense against contaminants while locking in premium synthetic lubrication. Designed for engineers and manufacturers who require a balance of low torque and high protection, the 686-2RS excels in environments where precision and maintenance-free operation are paramount.
686-2RS Deep Groove Ball Bearing 6×13×5 mm | ISO 618 Series – Slim Profile | Dual Nitrile Rubber Seals
This metric deep groove bearing is built to manage radial loads and light axial forces with extreme efficiency. The 686-2RS configuration is particularly valued for its "Sealed for Life" design, which eliminates the need for manual regreasing and protects the internal raceways from dust, grit, and moisture. With a limiting speed of 24,000 r/min under grease lubrication, it serves as a critical component for high-speed small-scale motors, handheld electronics, and automated robotics systems.

Optimized for micro-mechanics and precision hardware requiring consistent performance in constrained spaces:
Manufactured using high-quality GCr15 Chrome Steel, the 686-2RS features super-finished raceways that minimize friction and vibration. This ensures an ultra-quiet operation, which is essential for consumer electronics and medical devices where noise reduction is a key selling point.
Despite its miniature 13mm footprint, the 686-2RS offers a robust dynamic load rating of 1.08 kN. Its optimized internal geometry allows it to handle high-speed rotations without excessive heat buildup, making it a reliable choice for intensive duty cycles.
The dual 2RS nitrile rubber seals are designed to create a secure contact barrier. This setup is superior for applications exposed to the elements, preventing premature bearing failure caused by particle ingress and ensuring the factory-applied grease remains effective throughout the bearing’s lifecycle.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 618 Series (Metric Thin Section) |
| Basic Designation | 686 |
| Suffix | 2RS (Rubber Seals on Both Sides) |
| Bore Diameter (d) | 6 mm |
| Outer Diameter (D) | 13 mm |
| Width (B) | 5 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | Standard (P0) / P6 or P5 Available Upon Request |
| Cage Material | Pressed Steel / Reinforced Nylon |
| Dynamic Load Rating (Cʳ) | 1.08 kN |
| Static Load Rating (C₀ʳ) | 0.44 kN |
| Limiting Speed (Grease) | 24,000 r/min |
| Limiting Speed (Oil) | 30,000 r/min (with seals removed) |
| Weight (approx.) | 0.0028 kg |
Common industry equivalents for the 686-2RS:
The 686-2RS is supplied as a sealed unit for maximum reliability. For projects requiring even higher speeds and lower starting torque, the 686-ZZ (Metal Shielded) or 686 Open versions are available. We also provide stainless steel variants (S686-2RS) for specialized applications in food processing or marine environments.
"The 686-2RS is the definitive choice for engineers seeking a compact, dust-proof bearing solution that delivers high-speed precision and long-term durability."
Engineered for microscopic applications where space is an absolute premium, the 681-2RS is a highly compact, double rubber-sealed miniature deep groove ball bearing. Boasting a minuscule 1 mm bore and 3 mm outer diameter, this ultra-miniature component delivers exceptional rotational precision in micro-devices. The integration of dual non-removable contact seals (2RS) ensures the internal lubricant is strictly contained while simultaneously blocking microscopic debris, guaranteeing prolonged reliability in highly sensitive micro-electronics and precision instruments.
Details
The 681-ZZ is a high-precision, dual-shielded miniature deep groove ball bearing designed for microscopic mechanical assemblies where high rotational velocity and low frictional torque are critical. With an incredibly small 1 mm bore and 3 mm outer diameter, this component provides stable support in ultra-compact environments. Featuring two non-contact metal shields (ZZ), it offers excellent protection against larger debris while retaining factory-grade lubrication, making it the premier choice for high-speed micro-motors and sensitive optical devices.
Details
The 682-2RS is a high-performance, double rubber-sealed miniature deep groove ball bearing specifically designed for applications where rotational accuracy is paramount in a tiny footprint. Featuring a 2 mm bore and a 5 mm outer diameter, this precision component is engineered to deliver reliable support in micro-mechanical systems. Equipped with dual contact rubber seals (2RS), it offers superior protection against environmental contaminants while ensuring the internal lubricant remains sealed for the duration of the bearing's service life.
Details
The 682-ZZ is a precision-engineered, double-shielded miniature deep groove ball bearing designed for high-velocity applications where minimal friction is a critical requirement. With its compact 2 mm bore and 5 mm outer diameter, this bearing provides exceptional rotational stability in micro-scale assemblies. Equipped with two non-contact metal shields (ZZ), it effectively prevents the ingress of larger debris and retains factory-applied grease without the frictional drag associated with contact seals, making it ideal for high-RPM micro-motors.
Details
The 683-ZZ is a Premium Miniature Single Row Deep Groove Ball Bearing designed for ultra-high-speed rotation and low-friction performance in compact mechanical assemblies. Featuring a double-shielded configuration (ZZ), this micro-bearing effectively locks in pre-filled grease while keeping out dust and microscopic debris. With a highly compact 3mm bore and a 7mm outer diameter, the 683-ZZ delivers exceptional reliability for precision instruments, micro-motors, and advanced robotics where space is strictly limited but performance requirements are high.
Details
The 684-ZZ is a Premium Miniature Single Row Deep Groove Ball Bearing engineered for reliable, high-speed rotation in space-constrained mechanical environments. Characterized by its double-shielded design (ZZ), this bearing is expertly sealed with twin metallic shields that lock in essential lubrication while repelling airborne dust and fine particulates. Featuring a versatile 4mm bore and a compact 9mm outer profile, the 684-ZZ is the definitive solution for micro-motors, precision instruments, and automated assemblies demanding superior operational stability without adding excess bulk.
Details
The 685-2RS is a premium-grade miniature deep groove ball bearing designed for applications requiring high rotational speeds, low friction, and reliable protection against environmental contaminants. Equipped with dual-contact rubber seals (2RS), this model ensures superior lubricant retention while preventing the ingress of dust and moisture. With a compact 5mm bore and an 11mm outer diameter, the 685-2RS is the preferred choice for precision instruments, small-scale robotics, and high-tech electronic devices where space is limited but performance is critical.
Details
The 686-2RS is a high-performance miniature ball bearing engineered for versatility and durability in compact mechanical assemblies. Featuring a 6mm bore and 13mm outer diameter, this model is equipped with dual-contact rubber seals (2RS) that provide an airtight defense against contaminants while locking in premium synthetic lubrication. Designed for engineers and manufacturers who require a balance of low torque and high protection, the 686-2RS excels in environments where precision and maintenance-free operation are paramount.
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