Forging Steel Cold Rolling Mill Backup Roller

AstraRoll's Forging Steel Cold Rolling Mill Backup Rollers are the high-performance structural pillars of precision rolling systems. Specifically engineered for copper foil, aluminum plate, and thin-gauge steel production, our backup rollers are manufactured from premium vacuum-degassed alloy steels (such as 9Cr3Mo and 9Cr5Mo). Through a rigorous multi-directional forging process, we achieve a dense internal microstructure that facilitates the smooth moving of strips even under the most extreme reduction forces.

These rollers are designed to provide maximum rigidity and resistance to elastic deformation, ensuring a higher loading capacity across the entire roll face. By utilizing advanced differential heat treatment and deep induction hardening, AstraRoll delivers a product that combines a hard, wear-resistant surface with a tough, crack-resistant core. This ensures exceptional driving quiet wear resistance and stable smooth driving, maintaining tight gauge tolerances throughout the rolling cycle.

Technical Parameter

Material Grades: 9Cr3Mo, 9Cr5Mo, 86CrMoV7, MC3 / MC5 Forged Steel

Surface Treatment: High Quality Precision Grinding & Induction Hardening

Surface Hardness: 60–80 HSD (Customizable for foil or plate rolling)

Hardened Depth: 20mm – 50mm (Radius) for long-term driving quiet wear resistance

Concentricity / TIR: ≤0.005mm for ultra-high precision smooth moving

Roughness (Ra): ≤0.2μm for flawless metal surface finish

Dynamic Balance: ISO G1.0 standard to ensure stable smooth driving

Application Industrial

Copper Foil Production: Essential for 5G electronic foils and lithium battery current collectors.

Aluminum Plate & Foil: Supporting the high-speed rolling of beverage can stock and aerospace alloys.

Precision Strip Mills: Ideal for stainless steel and carbon steel reduction in 4-Hi and 6-Hi stands.

Non-Ferrous Metallurgy: Processing of brass, zinc, and titanium strips requiring high quality support.

Automotive & Energy: Manufacturing of high-strength plates with a focus on higher loading capacity.

Why choose AstraRoll's Forging Steel Cold Rolling Mill Backup Roller?

Ultra-High Precision Standards: We achieve a TIR of ≤0.005mm, making our rollers the preferred choice for the smooth moving of sensitive foil materials.

Advanced 9Cr3Mo Alloy Expertise: Our specialized alloy formulations provide a higher loading capacity and better thermal stability than standard forged steels.

Extended Fatigue Life: Engineered for driving quiet wear resistance, our rolls feature a deep hardened layer that resists spalling and extends the intervals between regrinds.

Flawless Surface Integrity: Every roller is precision-ground to ensure smooth driving, protecting the work rolls and the substrate from marking or uneven pressure.

Direct Manufacturer Integration: Furthermore, as a professional manufacturer, our backup rollers are fully customizable to interface seamlessly with various models of international rolling mill brands and AGC systems.

FAQ

Q: Why is 9Cr3Mo preferred for copper foil backup rollers?

A: 9Cr3Mo provides a superior balance of hardness and contact fatigue resistance, which is critical for maintaining the higher loading capacity and precision required for ultra-thin foil.

Q: How do you ensure the internal quality of the forging?

A: Every high quality roller undergoes 100% ultrasonic testing (UT) after forging to ensure no internal defects, facilitating safe and smooth moving under high tension.

Q: Can these rollers handle the high speeds of modern cold mills?

A: Yes. AstraRoll rollers are dynamically balanced and ground to extreme concentricity to ensure smooth driving and zero vibration at maximum operational speeds.

Q: Are the dimensions customizable for legacy mill stands?

A: Absolutely. Our backup rollers are fully customizable to interface seamlessly with various models of specialized or older mill housings and bearing assemblies.

Q1. Are you a trader or direct factory?

We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.

Q2. What are your main products?

AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.

Q3. What about delivery time?

We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.

Q4. How can I get a quote for customized products?

Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.

Q5. What is your payment?

TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.