SCHAAF - NEWS May 2007

Tensioning of two extruder presses in record time

Two horizontal extruder presses, each with two tie-rods and a capacity of 5MN and 10MN
(500t and 1000t) respectively, were tensioned using SCHAAF bolt tensioners.

The S 320 x 10 and S 380 x 10 SSVs were delivered in a record time of just 8 weeks after the initial enquiry.
Two tie-rods (Ø320mm) with a total length of 7125mm were used on the 10 MN extruder press. Nuts with a S 380 x 10 thread were used for mechanical countering. On the 5 MN extruder press, each tie-rod comprises of four sections with a total length of 21,928mm. The diameter measures 260mm, the thread is S 320 x 10.

Installation was performed on-site at the new Czech customer, Vitkovice Steel AS, who were assisted by the local
representative IKEMA BOHEMIA s.r.o and the fitting and installation company Hutní Montáže.

The highest levels of precision and organisation were called for to tension the extruder presses manufactured by Vitkovice Heavy Industries with SCHAAF bolt tensioners.

With the help of a special ball bearing roller support mechanism, total weight relief was able to be guaranteed, allowing a highly-precise, smooth installation in the shortest possible time.