model, scale 1:5, Mannesmann's tube rolling mill, plus components (see 2 stroke nos).

Gebruder Mannesmann was established by brothers Max and Reinhard Mannesmann, who together are credited with developing the first process for producing seamless steel pipes, in 1884. Models of the Mannesmann machine also exist in the Deutsches Museum, Munich, and the Technical Museum in Vienna, the latter by the same maker as the Science Museum's.

This type of tube rolling mill was patented in 1885 by Reinhard and Max Mannesmann and subsequently developed by them.

An iron billet at bright red heat is rapidly rotated by a pair of tapered rollers so that a cavity is formed by centrifugal force. The rollers are inclined to the axis of the billet with the result that the la tter is also fed forward, and, in consequence, reduced in diameter by the action of the rollers. The billet is also guided and supported by plates above and below and in passing out from the rolls is forced over a removable mandrel, which smooths the interior.