David Brown Santasalo, formerly David Brown Engineering, is a British engineering company, principally engaged in the manufacture of gears and gearboxes. Their major gear manufacturing plant is in Swan Lane, Lockwood, Huddersfield, adjacent to Lockwood railway station. It is named after the company's founder, David Brown, though it is more closely associated with his grandson, Sir David Brown (1904–1993).

Sir David Brown was an English industrialist, managing director of his grandfather's gear and machine tool business David Brown Limited and more recently David Brown Tractors, and once the owner of shipbuilders Vosper Thorneycroft and car manufacturers Aston Martin and Lagonda.