Rock Drills/ Hammer Drills TX Model # Stroke Weight (lbs) Length Bore BPM Chuck Air Inlet Air Consumption RPM TX-29RD 1.75″ 30lbs 18.5″ 1.125″ 2450 7/8″x 3 1/4″ & 7/8″ x 4 1/4″ 1/2″ 56 CFM 250 TX-60RD 3.22″ 61lbs 23.75″ 2.625″ 2250 7/8″x 3 1/4″, 7/8″x4 1/4″ & 1″ x 4 1/4″ 3/4″ 98 CFM 200 TX-29RD TX-60RD TX-C9