Jumbo Drills
The J.H. Fletcher line of jumbo drills are designed for drilling of slopes, bunkers, tunnels. The line features single boom, dual boom, and bench drills.
J151 DE single boom jumbo is designed for development and production drilling in headings from 10 ft. by 10 ft. (3m by 3m) up to 24 ft. wide by 21 ft. high (7.3 m high by 6.4m wide).
Two boom jumbo is designed specifically for limestone mines and efficient drilling of headings as large as 60 ft. wide and 35 ft. high in one set up.
J152 DE dual boom jumbo is designed for development and production drilling in headings up to 28 ft. wide by 21 ft. high (8.5 m high by 6.4 m wide) in one carrier set up.
Single boom jumbo is designed specifically for limestone mines and efficient drilling of headings as large as 50 ft. wide and 35 ft. high in one set up.