Product Category

　　Product Highlights
　　1. Hard on the outside, tough on the inside—harder with every impact: The entire body is cast from ZGMn13Cr2 high-manganese steel and undergoes a water‑toughening treatment at 1050–1100°C to obtain a single austenitic microstructure. During service, the surface undergoes impact hardening to HB 500–600, while the core retains high toughness.
　　2. Chromium upgrade for extended service life: Compared with standard Mn13, adding 1.5–2.5% chromium reduces early wear at the tooth tips by approximately 30% and significantly increases overall lifespan. During prolonged operation, it maintains excellent tooth profile integrity and ensures stable discharge particle size.
　　3. Compact structure and smooth operation: The toothed rollers feature a compact design, with the two rollers capable of differential-speed operation to reduce sticking and blockages, ensuring smooth and reliable performance.
　　User Pain Points
　　In coarse and intermediate crushing operations across industries such as coal, mining, metallurgy, and building materials, toothed rollers are subjected to harsh operating conditions characterized by high‑impact loads and severe wear from large‑size feed material. Conventional toothed rollers typically suffer from two major issues: first, insufficient toughness—large, hard particles readily cause chipping or breakage of the teeth, often resulting in prolonged downtime; second, poor wear resistance—the tooth tips wear down rapidly, compromising the tooth profile and leading to uncontrolled product particle size, which in turn causes a decline in production capacity.
　　Solution
　　Our company’s toothed rollers are cast entirely from high-manganese steel. Compared with standard Mn13, the addition of chromium reduces early wear at the tooth tips by approximately 30%, resulting in a longer overall service life, excellent shape retention during operation, and stable discharge particle size. The compact design ensures smooth operation, making it particularly well suited for applications involving severe impact and high wear.
　　I. Product Description
　　Our company’s toothed rollers are entirely cast from ZGMn13Cr2 (Mn13‑4) high-manganese steel. After water‑toughening treatment at 1050–1100°C, they develop a uniform austenitic microstructure, with an initial hardness of only HB 180–220. Under conditions of impact and compression from large‑size materials, the surface undergoes impact‑induced hardening to HB 500–600, while the core retains exceptional toughness, truly achieving “hard exterior, tough interior; the harder it is struck, the harder it becomes; resistant to impact without chipping or breaking.”
　　II. Product Specification Sheet
　　The toothed roll is cast entirely from ZGMn13Cr2 (Mn13-4) high-manganese steel; its chemical composition and properties are as follows:

　　III. Product Features and Advantages
　　1. Differential-speed operation for automatic cleaning and prevention of material buildup: The two toothed rollers can operate at differential speeds, using the speed difference to automatically clear material from between the teeth. This effectively reduces clogging caused by wet, sticky materials, ensuring continuous and stable crushing operations.
　　2. Excellent tooth profile retention and stable product size: Chromium addition reduces early wear of the tooth tips by approximately 30%, ensuring high tooth profile retention during long-term operation, minimal variation in product size, and reduced downstream screening workload.
　　3. Compatible with mainstream models and supports custom fabrication based on provided drawings: The product is compatible with dual‑tooth roll crushers from major domestic and international OEMs, featuring precise mounting dimensions for plug‑and‑play installation. We also offer non‑standard, custom‑made solutions tailored to your specific drawings, ensuring flexible alignment with diverse equipment types and operating conditions.
　　4. Flexible customization: Supports non-standard customization based on customer-provided drawings, meeting the differentiated needs of various models and operating conditions.
　　IV. Why Choose Us
　　• Specializing in wear‑resistant castings for harsh operating conditions: We are not a foundry chasing short‑term sales; instead, we are firmly rooted in China, focusing on the R&D and manufacturing of high‑manganese steel castings for demanding applications such as mining and power generation. Take the toothed roll as an example: specifically optimized for the severe impact and high‑wear conditions encountered when crushing large‑size materials in double‑toothed roll crushers, it is entirely cast from ZGMn13Cr2 high‑manganese steel. The addition of chromium reduces early wear at the tooth tips by approximately 30%, while the modular tooth‑plate design allows individual plates to be replaced without scrapping the entire assembly, significantly extending service life and reducing downtime‑related losses at the source.
　　• We let the data speak, not empty promises of perfection: Casting processes are complex; we don’t promise “zero defects,” but we do commit to “zero excuses.” Each batch of toothed rollers undergoes a comprehensive inspection process—including hardness testing, precise measurement of tooth profile dimensions, and magnetic particle inspection—to ensure assembly accuracy and seamless fit. Complete test reports accompany every batch, demonstrating our accountability through data and concrete action.
　　• Long-term partnerships—delivery is just the beginning: Our digital systems let you track production progress in real time, eliminating opaque operations; we respond immediately to quality concerns without delay; and every shipment includes a detailed test report for your quality records. We believe that a supplier’s attitude toward resolving issues truly reflects its value.
　　V. Production and Quality Assurance
　　Premium raw materials: Carefully selected high-quality scrap steel and high-manganese steel additives, free of rust and oil, ensure the purity of the toothed roll material at the source, laying the foundation for impact hardening performance.
　　Ultimate density: ceramic sand plus a large-diameter heating riser eliminates shrinkage porosity and cavities; the internal structure of the toothed roll is dense, enabling it to withstand high-impact loads from large pieces without cracking.
　　Precision melting: Japanese Fuji electric furnace melting, with real-time spectral analysis to verify composition, precisely controlling C, Cr, and Mn content to ensure work hardening and impact toughness.
　　Flawless casting: 850°C ladle preheating combined with bottom pouring ensures the elimination of sand‑hole defects, while the working surfaces of the toothed rollers and spliced tooth plates are smooth and free of casting imperfections.
　　Case hardening: 30-second rapid quenching produces a uniform austenitic microstructure, achieving “hard exterior, tough interior”—with the surface hardened to HB500–600 while the core retains high toughness.
　　Powerful shot blasting: cleans and hardens the surface, enhancing the wear resistance of the toothed roll’s working face while maintaining excellent tooth profile integrity.
　　Rigorous quality inspection: precise dimensional measurement and magnetic particle testing ensure the assembly accuracy of the toothed rollers and their tight fit.
　　Transparent delivery: Scan a code to track progress in real time, with full visibility from material input to shipment.
　　VI. Frequently Asked Questions (FAQ)
　　Q1: What is the minimum order quantity for toothed rollers?
　　Minimum order quantity is one piece. Bulk purchases qualify for discounted pricing.
　　Q2: What is the delivery time?
　　Custom-made toothed rollers based on your drawings take 45–60 days. Rush orders can be expedited upon negotiation.
　　Q3: What packaging options are supported?
　　Fixed with iron brackets and protected with stretch film, or packed in wooden crates, to meet the sea and land transportation requirements for toothed rollers.
　　Q4: Can the customer’s logo be printed on the packaging?
　　Yes, but cast lettering is only supported on the non-working surface of the casting.
　　Q5: What is the recommended material for toothed rollers?
　　We recommend using ZGMn13Cr2 (Mn13-4) high-manganese steel. After water toughening, the surface achieves impact hardening to HB 500–600 while the core retains high toughness, resulting in “hard exterior, tough interior; harder with continued impact; resistant to chipping under impact.” Compared with standard Mn13, the addition of Cr reduces early wear at the tooth tips by approximately 30%. Other material options can also be provided upon customer request.