Inter structure
Programmable Function-- Support to adjust the servo parameters, soft start, inversion and etc., so that it can better meet our own needs
Brushless Motor--Greatly increased servo torque, reliability and lower maintenance requirements
Steel + Titanium Gear--their stiffness is very similar, but the use of titanium gear can greatly reduce the servo’s weight
Metal Three Ball Bearings--solid metal material so that it can better handle servo higher loads and movements
Travel Angle--it have 180°operating travel angle and 220°mechanical angle
Potentiometer Angle Sensor--able to have a more stable field in flight
Outer design
25T Spline Output Shaft--Suitable for most applications
Fully CNC Heat Sink Case--Not only does it look textured, it also keeps servo in a low temps while running
Neat 3PIN Cable--The use of wear-resistant wire to resist the wear and tear caused by daily use, easy to fold and convenient storage
Difference between these two servos
The mainly difference of these two is the Stall Torque & Operating Speed, please see follow
A80BHSF: 36 kg-cm (500 oz-in) & 0.071 sec/60°at 8.4V
A80BHMF: 40 kg-cm (556 oz-in) & 0.085 sec/60° at 8.4V