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218 ISCAR DEEP HOLE DRILLING %u00bd%u0009ELB System GundrillsThe ELB system, originated from the German name %u201cEinlippenbohrer%u201d, is a single, straight fluted drill, also called the Gundrill. ISCAR provides Gundrills for drilling holes with an inner diameter of 0.9 mm to 40 mm and a depth of up to 440 drill diameters.Gundrills came along with advances in weapon technology and were first scientifically researched at the end of the 18th century. Earl Rumford, aka Benjamin Thompson, published his research at the Munich Arsenal in 1798.Gundrills were originally used to drill the barrel of firearms. Today, gundrills are widely used in all branches of mechanical engineering, usually for drilling deep holes on dedicated machines for mass production.