Centers
Pins used in conjunction with a lathe for holding work while revolving. They are usually made of steel. They are of two forms, known as male and female centers.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
Pins used in conjunction with a lathe for holding work while revolving. They are usually made of steel. They are of two forms, known as male and female centers.