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

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 36.1 mm / 1.60" x 0.8" x 1.42"
• Control interface: RC servo pulse width control, 1.50 ms neutral
• Manual adjustment port

This servo is compatible with our servo controllers and our servo wheels and sprockets. This servo is also compatible with our Mounting Bracket for Standard-Size Servos:

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			$21.39
SURPLUS SpringRC SM-S4303R 2-Pack	54	71	43	46	41	41.3 × 20.7 × 40.2	CCW→CW			$24.74 for a pair of servos
FEETECH FS5106R	95	83	75	67	43	40.8 × 20.1 × 38.0	CW→CCW			$24.35
Parallax Feedback 360°	140	35	–	–	41	40.0 × 20.0 × 37.2	CW→CCW			$29.95
FEETECH FT90R	135	21	108	18	9	22.9 × 12.1 × 26.5	CW→CCW			$12.63
FEETECH FS90R	130	21	100	18	9	22.5 × 12.1 × 23.4	CW→CCW			$9.82