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BM-5485HB-180 Servo Gearbox

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BM-5485HB-180 Servo Gearbox
BM-5485HB-180 Servo Gearbox
Status
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Price
$114.98
$114.98 - $164.98
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Details

623 oz-in of torque from an HS-5485HB! This servo gearbox is to the HS-5485HB as the Iron Man suit is to Tony Stark. The gearbox transforms this economical sport servo into a high torque servo capable of very demanding applications. Patented

Mechanics: The Bottom Mount Servo Gearbox framework is fully machined from 6061-T6 aluminum and anodized to resist scratches and wear. The 3/8" diameter solid stainless steel output shaft is supported by a pair of ABEC-5 double shielded ball bearings for smooth operation no matter the orientation of the load. The Bottom Mount Servo Gearbox has tabs on the bottom edge of the gearbox so that it can be mounted right to a flat surface.  An excellent choice for panning devices, FPV antenna trackers and base gearboxes on robotic arms.

Electronics: The servo installed into the gearbox gets modified and connected to an external potentiometer so that the amount of rotation is not limited by the servo but dependent on the relationship between the output shaft of the gearbox and the potentiometer connected to it. This patented setup allows the BM-5485HB-180 to rotate up to 180 degrees (see below for rotation options). An assembled servo gearbox will plug into a servo controller just like any other servo; no additional wiring will be necessary to put it to work!

In order to fit your application, all gearboxes are made to order. Use the guide below to make the appropriate selections for your BM-5485HB-180 Servo Gearbox:

⦁ Ratio:  The balance between torque and speed - The 7:1 ratio provides the highest torque and lowest speed while the 2:1 provides the highest speed and lowest torque.  Check out the chart under 'Specs' for details.

⦁ Rotation Programming:  This refers to how far the Servo Gearbox output shaft will rotate.  The stock programming will allow the output shaft to rotate 90 degrees with a 1000-2000μsec PWM signal range.  The max rotation programming will allow the output shaft to rotate 180 degrees provided the same 1000-2000μsec PWM signal range. Most servo controllers on the market are able to send this range however there are some transmitters that send a slightly lesser range which would limit the rotation achieved. If you're unsure what your servo controller is capable of sending, please check with the manufacturer.  

*This programming can be done with a Hitec servo programmer that's compatible with the servo installed into the gearbox if you have a programmer available or wish to purchase one to tweak your gearbox.

⦁ Direction Programming:  This refers to which direction the Servo Gearbox output shaft will rotate when provided an increased PWM signal from the servo controller.  All servo gearboxes are bi-directional (they're able to rotate either way).  The default programming is counter clockwise which means the gearbox output shaft will rotate CCW when the PWM signal is increased and it will rotate CW when the signal is decreased.  

*This programming can be done with a Hitec servo programmer that's compatible with the servo installed into the gearbox if you have a programmer available or wish to purchase one to tweak your gearbox.

⦁ Assembly: Servo Gearbox assembly can be tedious and does require soldering.  Modifying the HS-5485HB servo is the most time consuming step in the assembly process.  The internal stop must be cut out of the gear train inside of the servo, the stock potentiometer must be removed and the wires must then be connected to the external potentiometer.  If you are not comfortable assembling your servo gearbox, select 'Assembled' to have one of our technicians assemble it for you! 

SPECS

Ratio

Maximum
Rotation

Weight
(oz.)

4.8V Torque
(oz-in)

6.0V Torque
(oz-in)

4.8V Speed  
(sec/60°)

6.0V Speed 
(sec/60°)

2:1

180°

12.77

144

178

0.4

0.34

3:1

180°

12.73

216

267

0.6

0.51

3.8:1

180°

12.7

273.6

338.2

0.76

0.646

5:1

180°

12.73

360

445

1

0.85

7:1

180°

12.66

504

623

1.4

1.19


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

 

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

5485BM Gearbox Schematic

Product Weight 0.61 lbs
Output Shaft Diameter 0.375" (3/8")
Servo Included Yes
Servo Size Compatibility Standard
Voltage Range (Recommended) 4.8V - 6.0V
Max PWM Signal Range (Standard) 750 - 2250 μsec
Max PWM Signal Range (Increased Rotation) 878-2115 μsec
Travel per 1µs Signal Change (Standard Rotation) 0.096°/μsec
Travel per 1µs Signal Change (Increased Rotation) 0.162°/μsec
Max Travel (Standard Rotation) 144°
Max Travel (Increased Rotation) 201°
Direction w/ Increasing PWM Signal Counter Clockwise
Feedback Style 5KΩ Potentiometer
TECH TIPS

In closed loop control, the system is self adjusting. Data does not flow one way, it may pass back from a specific amplifier (such as velocity or position) to the start of the control system, telling it to adjust itself accordingly. Many physical systems are closed loop control at the lowest level since the data about velocity and current position modify the output (also position) at consistent rate.

Click here to see more on our closed loop systems 

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