SPG785A Gear Drive Pan System (4:1)

• Hitec HS-785HB Servo sold separately
• 4:1 Plastic gear down
• 315 Degree rotation with external potentiometer
• Requires assembly and modification to servo
• Power gearbox torque 228 in-oz
• Power gearbox speed 60° in .64 seconds

Introducing the ServoCity SPG785A Gear Drive Pan System (4:1). Now you can build a servo to your own specifications. A stock HS-785HB servo can rotate 3.5 turns (1.75 turns left or right from center) or 1260° total. When you install the HS-785HB servo into the gearbox, the total amount of rotation is decreased but the power and accuracy is increased. Position feedback remains since the potentiometer is not removed. Trading total rotation for power and precision is what this gearbox is all about. Building your own camera mount and need 360° of pan, this system works perfectly. Simply choose the gear ratio you need along with the amount of rotation your application requires. The lower the gear ratio, the more precision and power you will have but with less rotation. The SPG785A can handle tremendous side loads with the dual ABEC-5 precision ball bearing supported hardened 3/8” stainless steel hollow shaft. The shaft is hollow with a .290” inner diameter to allow wires from cameras, sensors or other devices to not tangle during multi-turn rotations. The frame of the SPG785A is machined from 6061-T6 aluminum (anodized) and offers six strong mounting holes in the top plate. Easily mount various attachments to the aluminum hub with four 5-40 tapped holes.

As shown in above images dual ball bearings support the 3/8” hollow shaft. The SPG785A can take on tremendous slide loads. The Servo can be moved slightly forward to adjust the gear mesh. The SPG785A with an SPT785A attached for tilting. The 3/8” hollow shaft can easily be adjusted. The hollow shaft allows wires from cameras, sensors or other attachments to go through the center shaft. The SPG785A is about the same size as a soda can. Plenty of room for wires coming through the .290” ID hollow shaft. Attaching devices is easy using the four (4) tapped 5-40 holes in the gear hub.