Power HD Continuous Rotation Servo AR-3606HB

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Pololu item #: 2149
Brand: Power HD
Status: Not Recommended for New Design 
RoHS 3 compliant


The AR-3606HB is a standard-sized servo that has been built by Power HD specifically for continuous rotation, making it an easy way to get your robot moving. It features two ball bearings on the output shaft for reduced friction, and it offers easy access to the rest-point adjustment potentiometer. This is the strongest continuous rotation servo we carry.

Key specs at 6 V: 71 RPM (no-load), 93 oz-in (6.7 kg-cm), 40 g, CCW rotation for pulse widths above the rest point.

Pictures

Power HD AR-3606HB continuous rotation servo

An example of hardware included with the Power HD AR-3606HB continuous rotation servo. Actual hardware might vary.

90 mm and 70 mm Pololu Wheels for Standard Servo Splines on FEETECH’s FS5106R and Power HD’s AR-3606HB continuous rotation servos.

Rear view of Power HD Continuous Rotation Servo AR-3606HB and Solarbotics red servo wheel with Mounting Bracket for Standard-Size Servos.

Power HD Continuous Rotation Servo AR-3606HB and Solarbotics red servo wheel with Mounting Bracket for Standard-Size Servos.

The servo cable is terminated with a Futaba-compatible JR-style connector.

Continuous rotation servo size comparison. From left to right: SpringRC SM-S4303R, Power HD AR-3606HB, FEETECH FS5106R, Parallax Feedback 360°, Parallax (Futaba S148), and FEETECH FS90R.




The servo cable is terminated with a Futaba-compatible JR-style connector.

Overview

The AR-3606HB is a standard-sized servo that has been built by Power HD specifically for continuous rotation. At 6 V, it has a maximum rotation speed of 71 RPM (no-load) and can produce up to 93 oz-in (6.7 kg-cm) of torque. It features two ball bearings on the output shaft for reduced friction, and it offers easy access to the rest-point adjustment potentiometer. The servo can be controlled using a direct connection to a single microcontroller I/O line without any additional electronics, which makes it a great actuator for beginner robotics projects. You can find more information about this servo under the specifications tab and in its datasheet (399k pdf).

The AR-3606HB continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. The default rest point is 1.5 ms, but this can be adjusted by using a small screwdriver to turn the middle-point positioner. Pulse widths above the rest point result in counterclockwise rotation, with speed increasing as the pulse width increases; pulse widths below the rest point result in clockwise rotation, with speed increasing as the pulse width decreases.

The servo has a 12″ (300 mm) lead that is terminated with a JR-style connector and includes additional servo horns and mounting hardware. The following picture shows an example of the hardware that might be included (actual hardware could vary):

This robotics servo, which also sometimes goes by the Power HD part number AR3606HB, is compatible with our servo controllers and has a Futaba-compatible output shaft, which means it works with our servo wheels for standard servos (25T, 5.8 mm spline). This servo is also compatible with our Mounting Bracket for Standard-Size Servos:

If you are looking for a similar servo that is capable of limited-range position control as opposed to continuous rotation speed control, consider the Power HD standard servo 6001HB, which has almost the same size, weight, speed, and torque as the AR-3606HB.

Note that, as with most hobby servos, stalling or back-driving this servo can damage it.

Continuous rotation servo comparison

Continuous rotation servo size comparison. From left to right: SpringRC SM-S4303R, Power HD AR-3606HB, FEETECH FS5106R, Parallax Feedback 360°, Parallax (Futaba S148), and FEETECH FS90R.

6 V 4.8 V Weight (g) Size (mm) Direction
vs pulse
(1ms → 2ms)		 Digital? Feed­back? Price
Max speed
(RPM)		 Stall torque
(oz·in)		 Max speed
(RPM)		 Stall torque
(oz·in)
SpringRC SM-S4303R 54 71 43 46 41  41.3 × 20.7 × 40.2  CW→CCW $14.95
SURPLUS SpringRC SM-S4303R 2-Pack 54 71 43 46 41  41.3 × 20.7 × 40.2  CCW→CW $19.95 for a pair of servos
FEETECH FS5106R 95 83 75 67 43  40.8 × 20.1 × 38.0  CW→CCW $15.95
Parallax Feedback 360° 140 35 – – 41  40.0 × 20.0 × 37.2  CW→CCW yes yes $27.99
FEETECH FT90R 135 21 108 18 9  22.9 × 12.1 × 26.5  CW→CCW yes $8.95
FEETECH FS90R 130 21 100 18 9  22.5 × 12.1 × 23.4  CW→CCW $5.95

Dimensions

Size: 40.5 × 20.0 × 38.0 mm
Weight: 40 g

General specifications

Digital?: N
Speed @ 6V: 71 rpm
Stall torque @ 6V: 93 oz·in
Speed @ 4.8V: 62 rpm
Stall torque @ 4.8V: 83 oz·in
Hardware included?: Y
Lead length: 12 in

File downloads

Frequently-asked questions

What are the wires coming out of my servo?

Most standard radio control (RC) servos have three wires, each a different color. Usually, they are either black, red, and white, or they are brown, red, and orange/yellow:

  • brown or black = ground (GND, battery negative terminal)
  • red = servo power (Vservo, battery positive terminal)
  • orange, yellow, white, or blue = servo control signal line

Please check the specs for your servo to determine the proper power supply voltage, and please take care to plug the servo into your device in the proper orientation (plugging it in backwards could break the servo or your device).

Note: Some of the servos we carry also have an optional fourth green wire that is separate from the three standard ones. This wire provides access to the feedback potentiometer, allowing you to directly measure the position of the output. The servos with this extra wire have "with Position Feedback" at the ends of their product names. The picture below is an example of such a servo.

FEETECH Sub-Micro Servo FS0403-FB with Position Feedback.

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