Testing servo torque

[Izzy]

Oz-in is torque - measured as a force at a distance (perpendicular distance of force to the point of pivot)

So if you have a rating as 100 oz-in and your testing with a servo horn pivot point 1/2" from center then your scale should hit around 200 oz. Conversely if you horn was 2" then your reading would be 50 on the device.

Something else to remember is the idea of safety factor. Even though it may put out 200 they may only rate it at 150 so it will perform well for a longer time. Whereas a lesser company might rate it at 185 thinking that you won't try to go too far. There are very few instances of design safety factors for products. Those that do exist are primarily things like military related and measuring devices.