The Quackenbush A2 Series is a lightweight automatic positive feed drilling machine built for aerospace assembly applications where access is tight, operator fatigue matters, and hole quality is non-negotiable. At just 5 lb (2.3 kg) base weight, the A2 is two pounds lighter than the larger A1 Series while sharing the same fully automatic drill cycle — start, feed, retract, stop — and delivering repeatable results with no manual feed variation.

Like its larger sibling, the A2 uses proven Mitis chip-breaking technology to perform one-shot drill-and-countersink operations with controlled chip fragmentation. This eliminates the need for separate countersinking passes, even in multi-material stacks, and the feed rate and Mitis parameters can be reconfigured in under 15 minutes. With a nominal capacity of 1/2" (12.7 mm) in aluminum and up to 400 lb (1,800 N) of thrust, the A2 is sized for the majority of fastener hole applications found in airframe skin and substructure work.

Available with either a governed turbine motor (2.95 hp) or a vane motor (1.4 hp), the A2 offers an exceptionally wide speed range — from 250 to 5,400 RPM depending on configuration — with seven selectable feed rates from .001 to .008 in/rev. Both right-angle and inline models are offered, with fixturing options including twist lock bushings (standard and vacuum), depth-sensing twist locks, concentric collets, and template feet. An external shear pin protects the gear head, and preventive maintenance intervals of up to 500 hours or 100,000 cycles keep the tool on the line and out of the repair shop.

For aerospace manufacturers comparing mid-range positive feed drills such as the Desoutter Setitec ST1200 or the Lübbering L.ADU pneumatic 56, the A2 Series provides a competitive combination of power, precision, and field-serviceability — with 15-minute feed rate changeovers, an external shear pin for gear head protection, and PM intervals up to 500 hours. Contact our engineering team for configuration assistance tailored to your specific aircraft program and material requirements.