The HSR-2645CRH Continuous Rotation Digital Robot Servo is a non-proportional, continuous rotation servo that delivers the commanding force you require, with intense, powerful torque, wide voltage capability and Hitec’s impressive metal gear train.
Responsive high speed motion and quick directional shifts make this the go-to servo for your most complex and specialized applications. Its programmability and "all-in" solid build will have radio control, robotic and engineering enthusiasts cheering.
Best servos ever!!!!!, very small and hardly no deadband
Do yourself a favour, if you got a Towerpro servo, throw it in the trash where it belongs. Stick with Hitec Servos. Used a continuous servo to power a 3d printed auger for my custom dog feeder