RotoShear P.O. Box 667 , Forestburg , Alberta T0B 1N0 Canada About Solutions products Companies RotoShear Products Model BMPH-N - Orbital Motor Model BMPH-N - Orbital Motor 0 Share 920 RPM at 12 gallons/minute. Normal output on a swather is 9 gallons/minute (690 RPM). Customer reviews No reviews were found for Model BMPH-N - Orbital Motor. Be the first to review! Add your review Publish your review Great! review successfully added!