Spreader rolls

Mario Cotta’s most recent division is in charge of spreader rolls, also known as bow rolls, but recent doesn’t mean inexperienced.

From engineering to manufacturing, Mario Cotta is committed to the highest quality standards. All the production process is followed by a team of highly skilled engineers and technicians that develop the best solution for customers’ application.

Mario Cotta guarantees high quality components and materials due to highly technological machines used. Balancing machine to balance all the segments and Mitutoyo for tolerances check.

Mario Cotta can offer:

  • Up to 8 meters face length
  • Up to 280mm diameters
  • Metallic or rubber rolls, with special treatments and sleeves
  • Fixed or variable bow
  • Special and Customized Project

Up to8meters

face length

Up to280mm

outside diameter

Test Machine

Completed rolls are tested at high speed on test machine. it could fit rolls up to 9 meters. This test returns fundamental values to guarantee rollers quality.

During tests, Mario Cotta measures vibration, critical speed and temperatures reached all along the face length.




  • New Application – Mario Cotta’s experience in engineering customized solution, allows to help customer for new application
  • Replacement for existing application – With all the information, Mario Cotta can offer replacement rolls for existing machines
  • Refurbishment – Technicians and Workshop are equipped and skilled for existing roll refurbishment