SPG785A-BM Standard Rotation

1,573 oz-in.

0.46 sec/60° (2:1 ratio)

SPG785A-BM	Rotation	Weight (No Servo)	4.8V Power (ounce-inch)	6.0V Power (ounce-inch)	4.8V Speed (sec/60°)	6.0V Speed (sec/60°)
HS-785HB (2:1 ratio)	630°	12.7 oz.	306	366	.57 sec.	.46 sec.
HS-785HB (3:1 ratio)	420°	12.7 oz.	459	549	.84 sec.	.69 sec.
HS-785HB (4:1 ratio)	315°	12.7 oz.	612	732	1.12 sec.	.92 sec.
HS-785HB (5:1 ratio)	252°	12.7 oz.	765	915	1.40 sec.	1.15 sec.
HS-785HB (8.6:1 ratio)	146°	14.1 oz.	1,315	1,573	2.40 sec.	1.97 sec.

Introducing the all new SPG785A-BM (Bottom Mount) Servo Power Gearbox. 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 (see chart for ratio specs) 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-BM 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-BM 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. Patented