360 degree servo motor, DS04-NFC 360 degree continuously rotating DC servo servo DC gear motor with continuous rotation for RC robot etc, power consumption <1000mA, torque 5.5kg / cm (at 4.8V) :
How to Make ANY servo rotate 360° - EASY and FAST - YouTube
Wheel for FS90R (360 degree servo motor) 60mm x 8mm – ETC Educational Technology Connection (HK) Ltd
1x Servo 360 Degree Continuous Rotation Servo Ds3115 Metal Gear Arduino Servo Digital Servo 10kg/cm - Parts & Accs - AliExpress
Amazon.com: KOOKYE 1PCS Mini Servo Motor 360 Degree Continuous Rotation w/ Servo Horn Set (Arm, X, Wheel, Star) for RC Car Robot Helicopter Airplane Model : Toys & Games
Pololu - Parallax Feedback 360° High-Speed Servo
Wireless Robo-car Using 360° Servo Motor : 7 Steps - Instructables