screwholding

Screwholding refers to the devices, fixtures, and methods used to securely hold screws in place during insertion, assembly, or machining. It encompasses manual holding tools as well as automated systems that prepare, present, and drive screws.

In manual operations, magnetic bit holders, magnetic screw cups, and other magnetic or mechanical guides help prevent dropped screws and allow one-handed operation. In automated environments, screw feeding systems deliver individual screws to a driver and hold them in a collet or nozzle until driven. Jigs and fixtures align components and stabilize screws for precise insertion, while pneumatic or vacuum-based screw presenters bring screws to the point of operation.

Common technologies include magnetic tool-holders with or without integrated torque control, screw dispensing magazines, screwdrivers with built-in grippers, and robotic end-effectors equipped for screw-holding. Torque-controlled drivers and sensors verify that the correct torque is achieved and that secure fastenings are produced.

Applications span electronics assembly, automotive and aerospace manufacturing, furniture production, and the assembly of consumer devices, as well as maintenance tasks in various industries.

Benefits of screwholding include increased insertion speed, reduced dropped fasteners, improved repeatability, and reduced operator fatigue. Limitations can include incompatibility with non-magnetic screws, potential contamination or magnetization of nearby parts, higher equipment costs, and the need for careful alignment and regular maintenance.