# Power HD Continuous Rotation Servo AR-3606HB **Type:** Product page · **SKU:** POLOLU-2149 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/power-hd-continuous-rotation-servo-ar-3606hb.html ([markdown](https://core-electronics.com.au/power-hd-continuous-rotation-servo-ar-3606hb.html.md)) ## Retired product This product is retired and no longer available for purchase. Replaced by: POLOLU-3430. **Replacement:** https://core-electronics.com.au/catalog/product/view/sku/POLOLU-3430 ## Description | [![](https://core-electronics.com.au/attachments/localcontent/0J7699_11143eac3a9.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7699_12110ecac47.jpg) | |---| | The servo cable is terminated with a Futaba-compatible JR-style connector. | 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](https://core-electronics.com.au/attachments/localcontent/AR-3606HB_39882fbb749.pdf) (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): | ![](https://core-electronics.com.au/attachments/localcontent/0J4908_51056f8d952.jpg) | |---| This robotics servo, which also sometimes goes by the Power HD part number AR3606HB, is compatible with Pololu's [servo controllers](https://core-electronics.com.au/breakout-boards-and-modules/motor-drivers-controllers/servo-controllers.html) and has a Futaba-compatible output shaft, which means it works with Pololu's [servo wheels](https://core-electronics.com.au/hardware/wheels.html) for standard servos (25T, 5.8 mm spline). This servo is also compatible with Pololu's [Mounting Bracket for Standard-Size Servos](https://core-electronics.com.au/mounting-bracket-for-standard-size-servos.html): | [![](https://core-electronics.com.au/attachments/localcontent/0J9429_260781b6772.jpg)](https://core-electronics.com.au/attachments/localcontent/0J9429_556009b7886.jpg) | |---| 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](https://core-electronics.com.au/power-hd-standard-servo-6001hb.html), 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** | [![](https://core-electronics.com.au/attachments/localcontent/0J5406_2508732d798.jpg)](https://core-electronics.com.au/attachments/localcontent/0J5406_15837f1c99f.jpg) | |---| | 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**](https://core-electronics.com.au/springrc-sm-s4303r-continuous-rotation-servo.html) | 54 | 71 | 43 | 46 | 41 | 41.3 × 20.7 × 40.2 | CW?CCW | | | $15.95 | | [**SURPLUS SpringRC SM-S4303R 2-Pack**](https://core-electronics.com.au/surplus-springrc-sm-s4303r-continuous-rotation-servo-pair-two-servos.html) | 54 | 71 | 43 | 46 | 41 | 41.3 × 20.7 × 40.2 | CCW?CW | | | $19.95 for a pair of servos | | [**PowerHD AR-3606HB**](https://core-electronics.com.au/power-hd-continuous-rotation-servo-ar-3606hb.html) | 71 | 93 | 62 | 83 | 40 | 40.5 × 20.0 × 38.0 | CW?CCW | | | $16.95 | | [**FEETECH FS5106R**](https://core-electronics.com.au/feetech-continuous-rotation-servo-fs5106r.html) | 95 | 83 | 78 | 70 | 39 | 40.8 × 20.1 × 38.0 | CW?CCW | | | $15.95 | | [**Parallax Feedback 360°**](https://core-electronics.com.au/parallax-feedback-360-high-speed-servo.html) | 140 | 35 | – | – | 41 | 40.0 × 20.0 × 37.2 | CW?CCW | ![yes](https://core-electronics.com.au/attachments/localcontent/check-fa31fa0963023302eb66fe206c0d1e8cb1135facdac9a4e8f5b5ffcc3c3ea377_29454a38f.png) | ![yes](https://core-electronics.com.au/attachments/localcontent/check-fa31fa0963023302eb66fe206c0d1e8cb1135facdac9a4e8f5b5ffcc3c3ea377_29454a38f.png) | $27.99 | | [**FEETECH FT90R**](https://core-electronics.com.au/feetech-ft90r-digital-micro-continuous-rotation-servo.html) | 135 | 21 | 108 | 18 | 9 | 22.9 × 12.1 × 26.5 | CW?CCW | ![yes](https://core-electronics.com.au/attachments/localcontent/check-fa31fa0963023302eb66fe206c0d1e8cb1135facdac9a4e8f5b5ffcc3c3ea377_29454a38f.png) | | $8.95 | | [**FEETECH FS90R**](https://core-electronics.com.au/feetech-fs90r-micro-continuous-rotation-servo.html) | 130 | 21 | 100 | 18 | 9 | 22.5 × 12.1 × 23.4 | CW?CCW | | | $5.95 | **People often buy this product together with:** | [![Power HD Standard Servo 3001HB](https://core-electronics.com.au/attachments/localcontent/0J2142_5750078ddc.jpg)](https://core-electronics.com.au/power-hd-standard-servo-3001hb.html) | [Power HD Standard Servo 3001HB](https://core-electronics.com.au/power-hd-standard-servo-3001hb.html) | |---|---| | [![Micro Maestro 6-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/attachments/localcontent/0J1951_59595b5951.jpg)](https://core-electronics.com.au/micro-maestro-6-channel-usb-servo-controller-assembled.html) | [Micro Maestro 6-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/micro-maestro-6-channel-usb-servo-controller-assembled.html) | |---|---| | [![Mini Maestro 12-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/attachments/localcontent/0J2330_574777fc8e.jpg)](https://core-electronics.com.au/mini-maestro-12-channel-usb-servo-controller-assembled.html) | [Mini Maestro 12-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/mini-maestro-12-channel-usb-servo-controller-assembled.html) | |---|---| **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** - **[Power HD AR-3606HB continuous rotation servo datasheet](https://core-electronics.com.au/attachments/localcontent/AR-3606HB_39882fbb749.pdf) (399k pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/p/o/power_hd_continuous_rotation_servo_ar_3606hb__pololu_2149__00.jpg)