Trailer or skid mounted blasting systems can range in size from 50 to 500 HP, with required speeds up to 3,000 RPM on smaller units. With SAE size bells from No. 7 up to No. 0, and torque ranges from 159 lb. ft. (216 Nm) to over 7,838 lb. ft. (10,628 Nm) Logan Bell Housing PTO's are properly sized to handle even the toughest demands in system torque and HP.