Davall Gears Spiradrive

The geometry of a Spiradrive gear set is such that, apart from applications where minimal to zero backlash is required, the mounting distance does not have to be controlled to the fine limits required by other gear forms, thus helping to reduce the machining time for the housing and facilitating easier assembly. Furthermore, the face form of the gear lends itself to high production techniques such as die-casting, sintering, plastic moulding and precision forging, whilst the pinion can be thread rolled if required in economic batch quantities.
Understanding that Spiradrive gears do not involve the use of standard tooth and pitch sizes, the designer is then able to design into them specific performance characteristics, such as high efficiency, self-locking, reversibility, high strength, exceptionally smooth angular velocity etc.: The permutations of these features are almost unlimited.