About

About Kobelco Stewart Bolling, Inc. KOBELCO STEWART BOLLING, INC. manufactures calenders from laboratory to 4-roll, full-size production models. All calenders can be fitted with a wide range of gauge and crown compensation devices including: Roller Bearings, Roll Bending, Zero Clearance Device, Cross Axis, and patented Hydraulic Roll Positioning. All Kobelco production calender roll and bearing block assemblies are tested on our hot roll test stand at operating temperatures. Prior to final assembly, KSBI measures toll concentricity and temperature profiles. KSBI can also design and manufacture complete upstream and downstream components such as letoffs, accumulators and a wide range of material handling devices. Kobelco Stewart Bolling, Inc., a global leader in high-performance mixing technology, designs and manufactures advanced machinery for the tire, rubber, and plastics industries. With over a century of engineering expertise and innovation, KOBELCO delivers custom-built solutions including internal mixers, Twin Screw Roller (TSR) Head Extruders, mills, rotors, and lab equipment—all engineered to meet the rigorous demands of modern manufacturing. Our patented six-wing rotor and versatile mixer designs enable faster cycle times, consistent batch uniformity, and reduced energy consumption. Whether you're mixing engineered rubber for automotive applications or developing high-performance plastics, KOBELCO’s technology ensures precision, durability, and efficiency. From aftermarket parts and equipment service to our state-of-the-art mixing lab, we support our customers with comprehensive solutions and global reach. Visit us to explore how KOBELCO can elevate your production capabilities and help you stay ahead in a competitive market.