Gears may be made in any and all types of machinable materials, such as plain carbon, alloy and stainless steels, brass or bronze, aluminum, phenolic, nylon and delrin. General configuration of the blank is a definite competitive factor for the manufacturer of the entire part. Common secondary operations include heat treating and applied finishes. There are many types of gears, including Spur, Helical, Splines, Worms/Worm Gears, Sector or Segment Gears, Shaped Spur Gears, and Face Gears. KEYWORDS for this process: gear hobbing, helical, hobbed, gears, spur, splice, hobs, timing pulley, worms, worm gears, bevel, gearmakers