Industrial Screwdrivers and Screwfeeders

Industrial screwdrivers and screwfeeders are automated tools that are used to turn screws while providing close control of screw torque. Pneumatic devices use compressed air and are suitable for low-torque applications such as woodworking or sheet metal repair. Electric devices use AC or DC power and are designed for applications that require higher levels of torque. For both types of industrial screwdrivers, actuation methods include buttons, triggers, levers, and press-down heads or bits. Screwdrivers with both forward and reverse motions are commonly available. Clutches use continuous or discontinuous drives. Industrial screwdrivers that use continuous drive clutches deliver power continuously and without interruptions. These devices are usually gear-driven and include both external torque control and an automatic shut-off function. Industrial screwdrivers with discontinuous drive clutches deliver power in short bursts, but do not provide torque between bursts. Some devices generate torque with a small chamber of oil. Others generate torque by pounding small, internal metal hammers against an anvil. 

Industrial screwdrivers vary in terms of head styles, drive types, sizes, and mounting styles. In-line devices rotate concentrically with the drive. Offset devices follow an axis of rotation that is parallel, but offset to the drive axis. Right-angle screwdrivers rotate perpendicularly to the drive axis. Flat-bladed screwdrivers are designed to tighten screws with slotted heads. Cross-head or Phillips screwdrivers use X-shaped bits are designed to ride out or cam out under strain to prevent over-tightening. Hex screwdrivers use a hexagonal head that is either 1/4” or 3/8” across the flats. Metric devices with 4 mm or 5 mm diameter drives are also available. Some industrial screwdrivers are designed for mounting in a fixed position. Others, such as cylindrical and pistol grip models, are handheld and portable. Typically, these handheld devices feature a positive clutch, consistent torque, and forward and reverse actions.

Industrial screwdrivers provide many ergonomic and safety features that are also designed to improve productivity and reliability. For example, devices that generate torque with a small chamber of oil are designed to absorb “kicks” to the operator while reducing cam outputs and possible damage to the repaired product. Devices with an automatic shutoff feature also provide controlled levels of speed and torque. Low-voltage industrial screwdrivers are commonly available. Some industrial screwdrivers include a magnetic head for picking up screws made of materials such as iron. Others include a vacuum pump for picking up screws made of nonmagnetic materials such as stainless steel and plastic. While a screwfeeder automatically feeds and presents the screw to the driver head. Integral transducers are used to provide torque feedback. Hardware extensions are used to lengthen bits.  Soft stop, a mode in which tightening softens as screws approach final torque, is another important feature to consider.

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