Due to their multiple mounting possibilities worm-gear drives are employed in almost all branches of industry. Their special features are the crossed axes and a wide range of gear ratios extending in one step from i = 5 to i = 100. The sliding motion of the tooth fanks ensures silent and vibration dampened operation. The simultaneous meshing of several teeth and the line contact result in a high load bearing capacity.
Atlanta standard worm drives are manufactured from well-proven materials. The worm is of steel and has hardened and ground fanks. The worm gears are of special gear bronze and are provided with a grey cast iron hub in the case of larger diameters. All standard drives available from stock are of the right-hand type. As regards their load bearing capacity, Atlanta worm-gear drive units are classifed according to centre distances. The maximum loading values indicated in the table have been calculated for standard worm drives (without cooling fan) and adequate dip-feed lubrication using synthetic gear oil (poly-glycol basis). In the case of lubrication with mineral oils the load values are reduced by 30–40 %.