In the demanding environment of modern mining, a conveyor chain’s reliability is non-negotiable. A single point of failure can lead to catastrophic downtime and significant financial loss. While the Cincinnati Mine Machinery Co. DA-350 conveyor chain is a well-known industry name, we offer a superior, high-performance alternative designed to exceed the rigorous demands of today’s mining applications. Our products guarantee an extended service life, reduced maintenance, and enhanced operational efficiency.We are a global leader in the manufacturing of heavy-duty mining chains, specializing in providing robust conveyor solutions for both surface and underground operations. With decades of industry experience and an unwavering commitment to excellence, we offer a product that is not just a simple replacement for the Cincinnati DA-350—it's a significant upgrade.| Cincinnati Model No. | Width (Inches) | Our Replacement Model | Scraper Width (Inches) |
| DA-350, DA-3502 | 27−1/2 | DA642A | 27−1/2 (698.5 mm) |
| DA-3502-A | 36−1/8 | DA719A | 36.28 (921.5 mm) |
| DA-3502-B | 34−1/16 | DA719A | 36.28 (921.5 mm) |
| DA-3502-G | 34−1/2 | DA719A | 36.28 (921.5 mm) |
| DA-3502-L | 33−1/2 | DA719A | 36.28 (921.5 mm) |
| DA-3502-VA | 29 | DA622A / DA622B | 29 (737 mm) |

| DA642 CONVEYOR CHAIN SELECTION CHART | |||||
| DA642A | Chain Unit Length is 11 Inch (279.5mm)(one Flight Section and one outer link) | WIDTH: 27 1/2 INCH(698.5mm) | |||
| Secondary Component | |||||
| DA642A01Flight Section | DA642A02Outer Link | ||||
| Tertiary Component | |||||
| DA642A002Outer Plate | DA642A003Irregular Hole Inner Link | DA642A004Scraper | DA642A005Pin | DA642A006Scraper Pin | DA622B007T-pin |
| Note : DA chain products are suitable for continuous miners, borer miners, road headers (mining/tunnelling). DA chains pitch range is from 2 5/8 inches to 3 1/4inches, product data sheet other than those listed are available upon request. | |||||

| DA711 & DA719 CONVEYOR CHAIN SELECTION CHART | |||||||
| DA711A | Chain Unit Length is 13 Inch (330.2mm) (one Flight Section and one outer link) | WIDTH: 28 INCH (711mm) | |||||
| DA719A | WIDTH: 36.28 INCH (921.5mm) | ||||||
| Secondary Component | |||||||
| DA711A02/ DA719A02Flight Section | DA711A03Outer Link | DA 711A01Cross-shaped Link | |||||
| Tertiary Component | |||||||
| DA711A001Single Lug ForkEnd | DA711A002Slotted TongueEnd | DA711A003Cross Pin | DA711A004Outer Plate | DA711A005 DA719A005Scraper | DA711A007Pin | DA711A008Scraper Pin | DA711A009cross pinjoint |
| Note : DA chain products are suitable for continuous miners, borer miners, road headers (mining/tunnelling). DA chains pitch range is from 2 5/8 inches to 3 1/4inches, product data sheet other than those listed are available upon request. | |||||||

| DA622 CONVEYOR CHAIN SELECTION CHART | ||||||
| DA622A | Chain Unit Length is 12 inches (304.78mm)(one Flight Section and one outer link) | 刮板宽度: 29英寸(737mm)WIDTH: 29 INCH(737mm) | ||||
| DA622B | Chain Unit Length is 18 inches (457mm)(one Flight Section, two Outer Links, and one Standard Inner Link) | |||||
| Secondary Component | ||||||
| DA622B01Flight Section | DA622B02Outer Link | |||||
| Tertiary Component | ||||||
| DA622B001Standard InnerLink | DA622B002Outer Plate | DA622B003Irregular HoleInner Link | DA622B004Scraper | DA622B005Pin | DA622B006Scraper Pin | DA622B007T-pin |
| Note: Raydafon’s DA chain products are suitable for continuous miners, borer miners, and road headers (mining/tunnelling). DA chains pitch range is from 2 5/8 inches to 3 1/4 inches. Product data sheets for other than those listed are available upon request. | ||||||
Our extensive experience in the mining sector is the driving force behind our product innovation. For decades, we have focused on producing top-tier mining chains and sprockets, developing a profound expertise in heavy-duty chain conveyor solutions for a wide range of applications. This experience allows us to anticipate industry needs and design products that are robust, reliable, and perfectly suited for the harsh, abrasive, and high-stress conditions of underground and surface mining.Our DA series, in particular, is a testament to this expertise. It is a product of meticulous design, engineered to withstand the high stresses and constant abrasion that continuous mining operations present. Each chain link and component is the product of our refined manufacturing processes, ensuring exceptional performance where it matters most. Our special heat-treated pins, for example, are a direct result of our commitment to improving product durability and wear resistance, which is crucial for maximizing service life and minimizing maintenance downtime.
Our authority in the industry is proven by our status as a trusted supplier to world-class original mining machinery manufacturers. This relationship is built on a foundation of trust, integrity, and consistent product quality. The durability and reliability of our DA series chains are renowned in demanding underground mining environments, and they are specifically designed as direct replacements for original equipment manufacturer (OEM) parts.Trustworthiness isn't just a claim; it's a promise we fulfill every day. We ensure that every link of our DF drop forged series chains is meticulously made using professional manufacturing techniques and is subjected to rigorous quality control measures. This same standard of excellence is applied across our entire product line, including the DA series. By choosing our products, you are partnering with a company committed to building long-term relationships based on mutual success. Our dedicated team provides comprehensive technical support and expert consultation to assist you with everything from chain selection to installation and maintenance, ensuring your operation runs smoothly and efficiently.Address
Luotuo Industrial Area, Zhenhai District, Ningbo City, China
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