Tungaloy’s DrillMeister series of head-changeable drills are designed to offer the productivity of solid carbide drills with the economic and cycle time reductions associated with indexable drills. The tools are suitable for drilling and can be equipped for chamfering in alloy steels, low-carbon and carbon steels; stainless steel; gray and ductile cast irons; aluminum alloys; and titanium. The cutting edge is designed to break chips into smaller, more compact swarf, and the head geometry features margins similar to that of solid carbide drills to improve hole accuracy. The tools are available in diameters ranging from 0.393" to 0.783" (10.0 to 19.9 mm) with whole depths ranging to length-to-diameter ratios of 3 and 5.
A chamfering adapter slides onto the drill body to enable drilling and chamfering in one process, reducing machining time. It is available with 30-, 45- and 60-degree inserts for flexibility. Two inserts rigidly secured with screws enable stable, precise machining and chamfering. The adjustable chamfering connections accommodate all three of the chamfer angle inserts to reduce tool inventory and costs, and are freely adjustable by altering the clamping screw.