Gear Dept. We hope that you try our gear dept. to buy or sell your surplus gears and we can guarantee that we will do our best to meet our needs. Typically our range of required types include the followings: Worm Gear units – single & double reductionHelical and worm combination gear unitsHelical gear unitsHelical and bevel helical gear unitsShaft mounted helical gear unitsVariable speed drivesCustom made worm gear sets – including dual lead technologyCustom made and high volume loose helical gearsStandard and custom made worm gear lift / escalators drive packageSpecial custom made gear units and package drive solutionsGear unit service and refurbishment