Just measure it.
Divide the rotation in 3 equal segments. Use a multimeter and measure the resistance. If it is 0ohm 25k, 75k und 100k it is linear.
I doubt I'd get a decent reading off it as the motor speed is totally random when I turn it.
A speed control pot is almost sure to be linear.
I need a 100k pot for a job but not sure if it's linear or not. It's used as a speed control on a scroll saw , any help appreciated.
View attachment 192931
View attachment 192932
Usually pots are marked A or B after the value to indicate the curve... it's been while but I thought it was A for log and B for Lin but then I found this:
http://www.resistorguide.com/potentiometer-taper/ just to muddy the waters
In that application I would have said linear.
It is certainly a 100 Kohm linear potentiometer with a body and axis made entirely of plastic in order to electrically isolate it from the outside of the circuit container. It is very common as an electronic component.I need a 100k pot for a job but not sure if it's linear or not. It's used as a speed control on a scroll saw , any help appreciated.
View attachment 192931
View attachment 192932