The motor works as described. However, the description did not mention that the 4.9 mm shaft has an unusual number of splines (25 instead of 21.). I was planning to use it for a robot drive motor, but I'm unable to find a wheel to fit the shaft.

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Product details
Here, for all your mechatronic needs, is a simple, high quality continuous rotation servo motor. This servo is able to take in 6 volts and deliver 30.6 oz-in. of maximum torque at 0.14 sec/60° A standard 3-pin power and control cable is attached and all hardware listed below is included. Features: Voltage: 4.8-6.0 Volts Torque: 27.8/30.6 oz-in. (4.8/6.0V) Speed: 0.16/0.14 sec/60° (4.8/6.0V) Rotation: 360° Dual Ball Bearing Plastic Gears Includes: 1x SM-S3317S Full Rotation Servo 1x Single Arm Horn 1x Double Arm Horn 1x Four Point Horn 4x Rubber Grommets 4x 2x15mm Phillips Screw 4x Brass Eyelets Dimensions: 31.3 x 16.3 x 28.5mm Wire Length: 160mm Weight: 18g Documents: Dimensional Drawing Datasheet (SM-S3317S)
