Feed Screwdriver System

The feed screwdriver system is a type of feeding mechanism used in some types of machine tools. This system uses single-ended screws with the blades on the side opposite the drive, which allow for both axial and off-center loading. The feed screw rotates at constant speed, while the workpiece moves along it linearly by means of various motions.

Feed Screwdriver System Basics

What are Feed Screwdrivers? Feed screws are elongated cylindrical shafts that have spiraling grooves called threads around them. The grooves are designed to match the threads on the internal gear that engages with the external driven gear. The driven gear is typically driven by a crankshaft, but may otherwise be driven by a motor.

The drive screw rotates around its axis and has a small end facing a stationary workpiece, while a driven screw spins around its axis and has a larger end facing another workpiece or the input shaft of the machine. The driven screw will have higher angular speeds than the drive screw due to its greater inertia, so it will move more slowly as well as experience contact with the workpiece as it spins.

The driven screw is threadably engaged with a driven gear on the machine, while the drive screw is threadably engaged with a driven gear on the machine. This makes it possible to move both axially and off-center between workpieces by varying the tension on each screw.

Typically, this system uses an inspection tool to ensure that all of the screws are properly tightened. The inspection tool also provides feedback to the operator to confirm proper operation.