Bucking bar is a work tool received behind work surfaces to provide a backing member in applying impact fasteners and including intermitted tool head and handle parts with a low-recoil impact-absorbing spacer provided there between to take shock loads in compression and shear.
Bucking bars are used on the backside of a metal rivet to counter the force of the hammering on the other side. They also can be used to absorb the force of rivet guns, reducing the vibration of bucking.
Bucking bars used to form buck tails on rivets. And come in many different shapes and sizes. They are normally made from alloy steel similar to tool steel. The particular shape to be used depends upon the location and accessibility of the rivet to be driven.
The size and weight of the bar depend on the size and alloy of the rivet to be driven. Under certain circumstances, and forspecific rivet installations, specially designed bucking bars are manufactured locally.