Forged Rolls

Sistemska tehnika has rich experience and long tradition in the production of forged rolls for cold rolling of sheet metal, strip and foil. We manufacture all kinds of trough and surface hardened rolls for cold rolling and straightening of sheets metal , steel strips and non-ferrous metals.

Dimensional range of roll production:

• From 20 (0,79'') to 850 (33'') mm diameter
• Up to 5500 (216'') mm length and
• Up to 10.000 kg (22,000 lbs) weight.

Sistemska tehnika Rolls Key characteristics:

• Application of ultra pure steels
• Application of steels developed specifically for cold rolls
• Computerized guidance and control of the volume and surface heat treatment processes
• production of high quality rolls based on rich experience
• Permanent and sustained efforts to improve quality and application of rolls in form of research and development
• Application of modern ND inspection methods 
• Independent quality assurance system
• Partnership relations with the customer based on experiences

Quality assurance

All business and production processes in Sistemska tehnika are led in accordance with ISO 9001:2008 and ISO 14001. Rolls must have proper hardness - depending upon roll type - usualy in the range between 52 to 67 HRC (73 to 103 HSc). Rolls provide a lot of specific properties like high rupture resistance, high wear resistance, resistance to spalling and exellent grindability and polishability.

During production process, rolls will be frequently inspected for inner defects using ultrasound. Surface defects are controlled with a combination of magnetic methods. Final inspection for dimensions and hardness follows. We guarantee uniformity of hardness in the range +/- 1 HRC.

• Conversation table for hardeness scales