Butt welding is a welding technique used to connect parts which are nearly parallel and don't overlap. Butt-welding is an economical and reliable way of...

This machine was built 1926 in Köln, Germany. Killebergs Kettingfabrik In 1905 Otto Jönsson built a workshop in Killeberg and started chain manufacturing...

In the chain forge iron links are welded into a chain. Forge welding is a solid-state welding process that joins two pieces of metal by heating them to...

The rod cutter from the 1920s cuts approximately 3m long steel rods into accurately dimensioned pieces, called “pins” which can then be bent into chain...

Recording 1, at Olofsfors Iron Works. Iron rods are rolled into a link shape package. Before welding the chain the workers have to cut the package into...

Recording 2, at Olofsfors Iron Works. Iron rods are rolled into a link shape package. Before welding the chain the workers have to cut the package into...