Specs for JR4031 servos?
I have 4 small books showing all JR servos from about 7 or 8 years ago to the present and see no 4031 designation. There is a 4131 listed which is an older design. If this is what you are looking for specs are as follows
Coreless-----94.4 oz/in torque--------Speed .23 sec/60 deg.-------
Wgt 1.50 oz.
Jim Whitney