1. API Spec 11E pumping unit 2.Conventional beam pumping unit 3. simple, stable, convenient, long service life pumping ... bearing, strong endurance. Self-aligning bearings are adopted in equalizer beam bearing and crank pin bearing, reducing installationerrors and the vibration ... polished rod loadStrokeRated torque of reducer(lbs)(in)(in.lbs)C-912D-470-24047,000240, 211, 181912,000C-912D-427-21642 ...