Hello I was wondering if anyone know a servo or stepper motor that has a motor arm length of 5cm that can supply at least 0.6N.m torque. A lot of the websites I have looked at does not specify the motor arm length.
Don't confuse stepper motors with servos. Stepper motors don't have arms, they are usually connected to gears or toothed-belt drives.
Servos are the things (often used in model aircraft) that you can command to move to different angles. And they normally do have arms. I don't think it is common to have an arm as long as 5cm, but it is an easy matter to attach a longer arm made, for example, from a scrap of aluminium.
...R
You can add an arm to a stepper motor, its not taboo - you will have to make it
though, they are not, as mentioned, supplied with one.
The length of the arm is irrelevant if you already know the torque - normally
you calculate the torque from the arm length and linear force needed.
For instance this one is 0.5N-m (5.1 kgf-cm) at 6V, seems to have a variey of
arms. DSS-P05 Standard Servo (5kg) - DFRobot