• High-speed balance motors for drones and mini quadcopters
  
• Extruder drive gears for desktop 3D printers
  
• Small cooling fans and blowers for compact electronics
  
• Rollers for RC car and hobby train sets
  
• Spindles for miniaturized power tools and engravers

• High-speed dental handpieces and drills
  
• Laboratory micro-centrifuges and vortex mixers
  
• Micro-pumps for medical drug delivery devices
  
• Rotating components in surgical robots and tools

• Stepper motors for small actuators
  
• Precision pulleys in office automation (scanners, copiers)
  
• Focusing mechanisms in laser cutting and marking heads
  
• Rotating joints in miniature robot arms

01. Space-Saving Architecture

With a 7 mm inner diameter and a razor-thin 5 mm width, the 687-2RS is engineered for mechanisms where every millimeter counts. It provides a high load capacity relative to its size, supporting a static load rating of 0.72 kN, which is sufficient for light-duty and instrument applications.

02. Engineered for Extreme Speeds

The 687-2RS is built for rotation. The cage-guided ball set and precision raceways allow for a limiting speed of 33,000 r/min with grease. This makes it an excellent choice for high-rpm spindles and dental tools where low heat generation and smooth running are critical.

03. Robust Sealing in a Small Package

The double rubber seals (2RS) are designed with a low-torque lip contact. This provides a tight seal against fine particulates without creating excessive drag, ensuring the bearing maintains its efficiency even in less-than-ideal operating environments.

Interchange Part Numbers

This bearing is a direct cross for industry-standard miniature bearings:

• SKF: 687-2RS
• NSK: 687DD / 687VV
• FAG: 687-2RS
• NTN: 687LLU
  • EZO: 687-2RS

Design & Configuration

While the 687-2RS (double rubber seal) is ideal for most dust-sensitive applications, we also offer this size in other configurations. For minimal friction, the open 687 variant is available. For applications with high temperatures or specific grease requirements, custom lubrication services are available.

"The 687-2RS proves that great performance comes in small packages, delivering high-speed rotation and reliable sealing for the world's most compact mechanical systems."