Multiple Spindle Screw Machines have been considered the back bone of high volume turned parts since the early 1900’s. They consist of 5 to 8 horizontal lathe spindles with horizontal end working attachments and 4 to 6 cross slides with attachments to form or thread the outside of parts. Various attachments are available to due various secondary operations. In our view Multiple Spindle Screw Machines are best for standard parts not requiring extensive secondary operations. Typical cycle times are 4 to 15 seconds. This is approximately the same amount of time required to feed barstock or to load a blank in CNC machinery.
Disadvantages of Multiple Spindle Screw Machines include tooling expense and long setup time required. Multiple Spindle Screw Machines begin to be a cost effective option when annual production volumes (or part families) exceed 50,000 pieces.