Transmission chain

anodized steelroundforged

JULI specializes in manufacturing high-tension structural round link chains engineered specifically for the harsh and abrasive environments of underground mining. Widely utilized in high-capacity scraper conveyors (AFC), stage loaders (BSL), and coal plows, our chains are built to deliver maximum uptime and superior fatigue resistance under immense dynamic stress. Premium Material Selection: Forged from advanced Cr-Ni-Mo alloy steel with specialized heat treatment. High Breaking Loads: Manufactured to meet and exceed DIN 22252 and ISO 614 structural safety standards. Advanced Wear Resistance: Case-hardened outer links provide high surface hardness while maintaining a ductile core to absorb shock loads. Comprehensive Size Range: Available in bar diameters ranging from 14mm up to 52mm+ for heavy-duty longwall mining systems. Superior Case Hardening for Abrasive Environments: Mining chains constantly rub against abrasive coal, rock, and steel pans. JULI chains undergo a proprietary induction heat-treatment process that creates a dual-zone microstructure: a rock-hard outer shell to resist wear, and a highly resilient, tough inner core to prevent sudden brittle fractures. Exceptional Fatigue & Shock Resistance: Underground mining involves constant starting, stopping, and jamming. Our chains are engineered with a high elastic limit, meaning they absorb the immense energy of sudden blockages without suffering permanent elongation or micro-cracking.