Tvingar

Tvingar are a family of clamps used to hold two or more pieces of material together temporarily during processing, assembly, or gluing. In woodworking, metalworking, upholstery, and electronics assembly, they keep parts in fixed relation so operations can be performed accurately and safely. The basic purpose is to apply steady pressure to secure the workpiece without shifting.

A tving consists of two jaws, one fixed and one movable, connected by an adjustment mechanism. The most common mechanisms are a threaded screw, a bar or pipe frame, or a quick-release lever. The contact surfaces are often equipped with pads or protective inserts to prevent marring of delicate surfaces.

Types vary by design and application. Screw clamps use a threaded rod and nut to set precise pressure. Bar clamps and pipe clamps provide long, straight reach for wider workpieces. Quick-release clamps allow rapid adjustment and release, which speeds up clamping during layout or glue-up. C-clamps and locking pliers are smaller or more portable options for general purpose use.

Materials and sizes vary widely. Clamps may be made of steel or aluminum, with rubber, plastic, or wooden pads to protect surfaces. They range from compact clamps suitable for small components to long clamps designed for large panels or boards.

Care and safety involve avoiding overtightening to prevent glue squeeze-out or damage, keeping threads clean and lubricated, and using appropriate pads to protect surfaces. Proper alignment and even pressure help ensure joints cure correctly and workpieces remain undistorted. In Swedish, the term tvingar reflects this general category of fastening tools.