servo Motors

Last week I told all about the calcomp I got, well it is almost apart
what I need now is to find out the OZ rating on it .Would anyone
knowwhere I can get some infomation on a Hathaway Servo Motor . I
sent an e-mail to Hathaway and received no reply,They are 30 volt
servos . I do know that the servos will take 15lbs of pulling force
before the overload kicked out on the Calcomp I used a pull scale to
see when the servo's would kick ,Yes I know not a good way of
checking but what the heck right .Almost like the sand and cup
Thanks group

John