Collared Joints

"... Verdigris; where engineering becomes art ..."

bronze and copper collars around stainless steel bars

Blacksmiths have traditionally used collars for joinery for thousands of years. A suitable length of metal is heated in the forge, then wrapped around the pieces being joined. As the collar cools it shrinks, which causes it to strongly grip the pieces together.

These days electrical welding has largely replaced collars for mass produced work. However, many contemporary blacksmiths find collars more aesthetically pleasing than a welded joint and use them as a design feature. In particular, a collar can be used to great effect as a contrasting metal detail, as the above image shows.