The HS-488HB servo is based around the popular HS-485HB but with a few noteworthy changes. To be more compatible with a wider spectrum of the servos and attachments on the market, the HS-488HB has a 25 tooth spline. This makes bulking up supporting parts much easier as you are able to stick to one spline size rather than bouncing back and forth between 24 and 25. The new spline comes with a larger servo screw that has a 2.5mm hex drive rather than a Phillips drive. The HS-488HB also has an updated potentiometer which has allowed the removal of the mechanical stops in the geartrain. Without mechanical stops you can drive the servo to the extremes in terms of range of motion without concern of contacting a mechanical stop which puts the servo in a stall situation.
The answer to this question is partially dependent on what you are using to control the servo.
Click for a quick video explanation.
With an Average Radio System:
Your average transmitter and receiver will output a relatively narrow PWM signal range.
Radio System + Travel Tuner:
Adding a Servo Travel Tuner to your radio system setup will allow you to achieve wide PWM signal ranges.
Wide Signal Controllers:
Controllers such as the Servo Commander, Arduinos, and Raspberry Pi servo hats can usually send a wide signal.
|Output Shaft Style||H25T Spline|
|Voltage Range||4.8V - 6.0V|
|No-Load Speed (4.8V)||0.22sec/60°|
|No-Load Speed (6.0V)||0.18sec/60°|
|Stall Torque (4.8V)||66.6 oz-in. (4.8 kg.cm)|
|Stall Torque (6.0V)||83.3 oz-in. (6.0 kg.cm)|
|Max PWM Signal Range||553-2425μsec|
|Travel per µs||.102°/μsec|
|Operating Temperature||-20°C to +60°C|
|Current Drain - idle (4.8V)||8mA|
|Current Drain - idle (6.0V)||8.8mA|
|Current Drain - no-load (4.8V)||150mA|
|Current Drain - no-load (6V)||180mA|
|Continuous Rotation Modifiable||Yes|
|Direction w/ Increasing PWM Signal||Clockwise|
|Motor Type||3 Pole Ferrite|
|Feedback Style||5KΩ Potentiometer|
|Output Shaft Support||Top Ball Bearing, Bottom Bushing|
|Wire Length||11.81" (300mm)|