Hello All, I just found this website and thank goodness it exists. So I have a motor turning an eccentric arm that drives a rod pushing a plate back and forth (imagine an old locomotive). The motor is running at 3 HP at 1725 RPM. The stoke is 1.75" (so the radius of the eccentric arm assuming it is a disk is .875"). It moves a plate that weighs 75 lbm. I need to find the tonnage force the plate pushes. I'm thinking I need to get torque and translate that to the linear motion in one direction (the push stroke vs the pull stroke), but it seems like I keep getting too low of a force....thoughts?