Paper: Rod Rotator Torque in Rod Strings

In the last several years, the question has been frequently raised as to how much torque can a typical rod rotator transfer to a rod string. This is an especially important consideration for fiberglass rods. This paper discusses testing on three popular rod rotator models, the T-164TM, T-252TM, and T-302TM, plus an optional version, designated as T-302SGTM (slow gear version). The test results are based on carrier bar loads versus output torque measured at the instant that slippage occurs at the frictional interface located between the worm gear or ratchet table and the cover cap of the various rod rotator designs. In addition, a case history involving a new, positive drive version known as a "T-302 No-Slip" Rod Rotator, for situations involving extreme wear on one side of rod guides, will be discussed. This new style of rod rotator uses special components to lock the worm gear to the cover cap and also to prevent the rod clamp from slipping on top of the cover cap.