# Parallax (Futaba S148) Continuous Rotation Servo \#900-00008

**Type:** Product page · **SKU:** POLOLU-536 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/parallax-futaba-s148-continuous-rotation-servo-900-00008.html ([markdown](https://core-electronics.com.au/parallax-futaba-s148-continuous-rotation-servo-900-00008.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: POLOLU-1248.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/POLOLU-1248

## Description

| [![](https://core-electronics.com.au/media/remote_images/0J515.250_8sAWpQ.jpg%3F45cb6ffa09ba45a1a4a90e9f2b7ff4e8)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_BfAw38.png)](https://core-electronics.com.au/#) |
|---|
| Parallax (Futaba S148) continuous rotation servo. |

## Overview

The Parallax (Futaba S148) continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. It can be controlled directly by a microcontroller without any additional electronics, which makes it a great actuator for robotics projects. The servo includes an adjustable potentiometer that can be used to center the servo and comes with a star-shaped servo horn and an 11″ (270 mm) lead.

### Specs

- Power: 4.8 – 6 V
- Top 6 V speed: 50 RPM (with no load)
- Torque: 2.7 kg-cm/38 oz-in at 6 V
- Weight: 43 g/1.5 oz with servo horn and screw
- Size (L x W x H): 40.5 mm x 20.0 mm x 38.0 mm / 1.60" x 0.8" x 1.50"
- Control interface: RC servo pulse width control, 1.50 ms neutral
- Manual adjustment port
 
This servo is compatible with Pololu's [servo controllers](https://core-electronics.com.au/#) and Pololu's [servo wheels and sprockets](https://core-electronics.com.au/#).

## Continuous rotation servo comparison

| [![](https://core-electronics.com.au/media/remote_images/0J5406.600_WDlTpk.jpg%3Fb6374314f3f370df6cd04f2f02da02d1)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_BfAw38.png)](https://core-electronics.com.au/#) |
|---|
| Continuous rotation servo size comparison. From left to right: SpringRC SM-S4303R, Power HD AR-3606HB, Parallax, and FEETECH FS90R. |

 |  | ![](https://core-electronics.com.au/media/remote_images/0J2319.100_sfqNEP.jpg) | ![](https://core-electronics.com.au/media/remote_images/0J4907.100_M6XhQG.jpg) | ![](https://core-electronics.com.au/media/remote_images/0J4913.100_CI2onx.jpg) | ![](https://core-electronics.com.au/media/remote_images/0J5403.100_AO1orn.jpg) |
|---|---|---|---|---|
|  | [SpringRC SM-S4303R](https://core-electronics.com.au/springrc-sm-s4303r-continuous-rotation-servo.html) | [**PowerHD AR-3606HB**](https://core-electronics.com.au/power-hd-continuous-rotation-servo-ar-3606hb.html) | [**Parallax (Futaba S148)**](https://core-electronics.com.au/parallax-futaba-s148-continuous-rotation-servo-900-00008.html) | [**FEETECH FS90R**](https://core-electronics.com.au/feetech-fs90r-micro-continuous-rotation-servo.html) |
| Max Speed @ 6 V: | 54 RPM | 71 RPM | 50 RPM | 130 RPM |
| Stall torque @ 6 V: | 71 oz-in | 93 oz-in | 42 oz-in | 21 oz-in |
| Max Speed @ 4.8 V: | 43 RPM | 62 RPM | 39 RPM | 100 RPM |
| Stall torque@ 4.8 V: | 46 oz-in | 83 oz-in | 33 oz-in | 18 oz-in |
| Weight: | 41 g | 40 g | 43 g | 9 g |
| Size (mm): | 41.3×20.7×40.2 | 40.5×20.0×38.0 | 40.5×20.0×38.0 | 23.2×12.5×22 |
| Price: | $12.95 | $14.95 | $13.95 | $4.95 |

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/a/parallax__futaba_s148__continuous_rotation_servo_900_00008__pololu_536__00.jpg)