1,281 oz-in.

 

0.46 sec/60° (2:1 ratio)

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 6-32 tapped holes. Patented

 Build Your Power Servo

Price:

 $139.98 w/Servo

Part:

 SPG785A-BM

Status:

 In-Stock

Servo:

 

Ratio:

 

Kit:

 

Qty:

 

(Shown with optional 5:1 metal gears)

Shown with round ABS Platform

SPG755A-BM-CR End
SPG785A-BM with disk1

Click here to watch a video of our SPG785A-BM Bottom Mount Servo Gearbox in action.

ServoCity video - click to play
Patented
SPG785 Bottom Mount Gearbox with text1
SPG785 Bottom Mount Gearbox - side view
SPG785 Bottom Mount Gearbox - top view
SPG785 Bottom Mount Gearbox - with can for scale

Four 6-32 tapped holes in the mounting hub allows for various attachments.

SPG400 Power Gearbox - Standard (.770) - clamping hub

 SPG785A-BM

Rotation

Weight
(With 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°

13.6 oz.

306

366

.57 sec.

.46 sec.

HS-785HB (3:1 ratio)

420°

13.6 oz.

459

549

.84 sec.

.69 sec.

HS-785HB (3.8:1 ratio)

332°

13.6 oz.

581.4

695.4

1.06 sec.

.874 sec.

HS-785HB (5:1 ratio)

252°

13.6 oz.

765

915

1.40 sec.

1.15 sec.

HS-785HB (7:1 ratio)

180°

13.7 oz.

1,071

1,281

1.96 sec.

1.61 sec.

Closed Loop - Click here to learn more

Want to try a different gear ratio on your Servo Power Gearbox?

This product utilizes a 0.770” hub pattern.

770 pattern
End Cap Link - Bottom Mount Gearbox

Want to attach this gearbox to a Tube Gearbox? Use an Aluminum End Cap.

785 bottom mount1

Ratio

Servo Gear

Servo Gear
 Part Number

Hub Gear

Hub Gear
Part Number

2:1

32T

615290

64T

615194

3:1

24T

615286

72T

615198

3.8:1

20T

615282

76T

615202

5:1

16T

615278

80T

615206

7:1

12T

615274

84T

615210

Copyright 1999-2013 Robotzone, LLC. - All Rights Reserved
ServoCity is a registered trademark of Robotzone, LLC.

We have the parts for your ideas!
SPG785A-BM Bottom Mount
Shopping Cart Button
Customer Login
Register
ServoCity on YouTube
ServoCity on Facebook!
ServoCity on Twitter!
ServoCity Blowout Deals Newsletter Sign-Up!
ServoCity on Google+

Newsletter Sign-up

New Products! - Click Here

Proud Distributor of

Proud Actobotics Distributor