Amarillo Gear Company began designing and manufacturing Spiral Bevel Right Angle Pump Drives in 1934, primarily for the irrigation industry. Amarillo Gear Pump DriveToday, standard models include a wide variety of drives in a wide range of ratios and configurations. All spiral bevel gears are precision machined from nickel alloy steel, case hardened, and lapped in pairs. Efficiency varies with speed, power, and thrust. Normal ranges are 96-98% efficient. For more details, visit