Case Studies

Client

Paper Industry

The PORTABLE ROTARY LATHE

Timeframe

6 weeks

The Brief:

In 1959 the paper industry was faced with another engineering problem. In order to remove one single roll from the paper mill for machining, it had been necessary to knock down a wall, construct a bridge, hire a special transporter with police escort, and be without the roll for 18 months. The enormous cost of this operation, and the consequent downtime, was crippling.

To remove one single roll from the paper mill for machining, it had been necessary to knock down a wall, construct a bridge, hire a special transporter with police escort, and be without the roll for 18 months.

The Solution:

John D Hotchkiss devised a simple but effective solution: take the lathe to the mill and machine the parts in-situ. He then set to work and designed a prototype portable, rotary lathe which was able to machine the journals on six cylinders at the paper mill during the time usually taken for just one to be completed by traditional methods. This unique invention revolutionised the whole concept of machining.