SG20 Series Servo Gearbox (3.8:1 Ratio, Continuous Rotation, 1794 oz-in, 18 RPM)

• SG20 Series Servo Gearbox (3.8:1 Ratio, Continuous Rotation, 1794 oz-in, 18 RPM)
• Offers a 1/2 inch diameter stainless steel shaft
• Bidirectional and fully proportional
• Is easily attached to Actobotics Channel
• Programmed for continuous rotation
• Utilizes Hitec HSR-M9382TH servo

The SG20 Series Servo Gearbox (3.8:1 Ratio, Continuous Rotation, 1794 oz-in, 18 RPM) utilizes the Hitec HSR-M9382TH servo that has been programmed for continuous rotation.

This means that the servo driving the gearbox has no limitation to the amount of travel. The signal that you send to the servo will determine the speed at that the servo rotates.

It is bidirectional and fully proportional, meaning that you can vary the speed and direction with the signal being sent from your servo controller.

This 3.8:1 ratio model will result in the large aluminum gear spinning a little more than one fourth the speed of the original servo, but with nearly four times the torque!

The 1/2" diameter stainless steel shaft of the Servo Gearbox is supported by a pair of 1/2" ball bearings and held in place with retaining rings above and below the bearings so that it can withstand loads from any direction.

The Servo Gearbox is easily attached to the Actobotics Channel, given it is overall width of 1.32" (to match the internal width of the U-Channel). For those of you installing in an R/C vehicle, the 585506 bracket is a popular choice as it creates ears to mount the servo gearbox down to a flat surface.

This model is programmed for continuous rotation, you can actually toggle back and forth between continuous (open loop) and feedback (closed-loop) mode, using the Hitec DPC11 servo programmer and BLDC Ver 3.1 firmware.

Given the 3.8:1 ratio, when programmed to feedback mode, the gearbox is capable of up to 1.8 turns and the speed will be 0.53 sec/60°.