Function: Straightening of bar is carried out by two rolls which have the form of hyperboloid of rotation and are arranged at an angle with the bar axis. Both rotary and feed motion is imparted to the bar by the rolls. The bars are straightened due to contact with the rolls which have variable radii and constant speed of rotation. Polishing action takes place due to variable peripheral speed of different points of contact of the bar with the rolls at constant peripheral speed of the bar.

Construction: Two rolls hardened and tempered with barrel shape and concave shape are place one upon another in a skewed configuration. The rolls are driven by drive motor through gear box and cardan shafts.The rolls are supported on antifriction bearings.

Incoming bar: Hot rolled 20-120mm diameter

Grades: low alloy steels, carbon steels, Cr- Ni steels, Spring steels

Bar Length:  2.5 to 7 m

 Yield strength: <=1000 MPa     

 Outgoing Bar: straightness after straightening <= 1 mm per m

Surface condition: Free of dent, scratch, roll mark, groove mark.