Robotis - Dynamixel RX-24F Servo HN07-N101
Robotis RX line of Dynamixel Serial servos is designed for high end Robotics applications offering great reliability (with Full Metal Gears), High torque and High Speeds (in this RX-24F version).
The servos have RS485 serial interface for reliable communication and include a protocol with several complaince and status parameters that can be queryed and configured at speeds up to 1Mbps.
The RX-24F is the Fast version of the RX-28 and is one of the fastest servos from Robotis, with amazing 126RPM (no load speed).
RX24F/RX-28 Comparison Charts
Complete Specifications and Manual