High-Quality Leveler Roller Manufacturers & Factory

Surface indentation on sensitive materials (such as 304/316 BA stainless steel or automotive 5000/6000-series aluminum) is primarily caused by embedded foreign debris, particulate scale, or micro-spalling on soft roller surfaces. We eliminate this issue through 6-high cassette configurations using mirror-polished (Ra ≤ 0.05 μm) and industrial hard-chrome-plated rollers (≥ HV 900), paired with felt-cleaning wipers, high-pressure roll washing systems, and non-marking entry pinch rolls.

Roller diameter is governed by the plastic bending radius required to achieve at least 70% to 80% outer-fiber yield strain across the strip cross-section. Smaller roller diameters achieve higher curvature and yield penetration on thin gauges (0.3–2.0 mm), while thicker structural plates (6.0–20.0 mm) require larger diameters to resist catastrophic elastic deflection and mechanical yielding of the shaft itself under high separation forces.

A 4-High machine consists of work rolls directly supported by segmented backup bearings, ideal for hot-rolled steel and heavy structural plates. A 5-High machine incorporates intermediate rolls on one bank to prevent backup shadow striping. A 6-High cassette features full intermediate roller sets between both the upper and lower work rolls and backup assemblies, essential for cold-rolled, electro-galvanized, and automotive-surface coils.

Because our rollers feature an induction hardening depth of 4.0mm to 8.0mm, a typical work roll can undergo between 6 and 12 precision CNC regrind cycles (removing 0.1mm to 0.2mm on diameter per cycle) before the hardened case depth is compromised. This equates to an operational lifespan of 3 to 7 years under multi-shift operation.

Yes. Our engineering department regularly retrofits and manufactures bespoke replacement roller sets, intermediate rolls, and custom-machined backup roller bearings for European, Japanese, and American leveling and cut-to-length lines. Precision coordinate-measuring machine (CMM) reports and material test certificates are supplied with every order.

All finished rollers undergo multi-stage ultrasonic degreasing, followed by the application of MIL-spec heavy-duty anti-corrosion barrier oil. Rollers are sealed inside vacuum-nitrogen foil barriers with desiccant packs, wrapped in protective high-density EVA shock padding, and secured in fumigated solid wooden crates engineered for cross-ocean container transport.