Chain Type: Heavy-duty Drop Forged Chain (for rivetless & conveyor applications)
Chain Sizes: X348, X458, X678 and other standard formats
Material: Alloy steel forged links with case-hardened pins & sidebars
Heat Treatment: Surface hardened + core tempered for wear & fatigue resistance
Application: Overhead, trolley & bulk conveyor systems in industrial material handling
The Drop Forged Chain is a premium industrial chain crafted through precision forging and heat-treatment processes to deliver exceptional strength, durability, and wear resistance. Engineered for the most demanding conveyor systems, this chain adapts to heavy-duty material handling tasks across mining, bulk logistics, automotive assembly, and other industrial sectors.
Available in popular sizes such as X348, X458, and X678, the Drop Forged Chain provides reliable load-bearing performance with excellent fatigue life and serviceability. Its robust forged construction ensures consistent operation, minimal elongation under load, and ease of installation or maintenance—making it a trusted solution for overhead conveyors, trolley lines, and custom power transmission systems.
High Tensile Strength: Each Drop Forged Chain link is made from specially alloyed steel with case-hardened surfaces and ductile cores, providing exceptional tensile strength and resistance to breakage under heavy loads.
Superior Wear Resistance: Precision heat treatment delivers a hard exterior surface that withstands high abrasion and long wear life, reducing the frequency of replacements and maintenance.
Shock & Impact Durability: The balance of surface hardness and ductile core increases shock resistance, ensuring reliable chain performance in systems with frequent starts/stops or high dynamic loads.
4B Components
Flexible Assembly: Designs like X348, X458, and X678 include features such as loose-link or rivetless construction, enabling easier chain disassembly/assembly when needed, reducing downtime.
Versatile Sizes & Attachments: Available in multiple sizes and attachment options, this Drop Forged Chain can be adapted for specific conveyor designs and material handling requirements.

Standard | Chain No. | Reference pitch P (mm) | Diameter of pin d2 (mm) | Length of pin L (mm) | Standard length (min/max) (mm) | Number of pitch within standard length | Sideward bending angle α (°) | Width of sidebar h2 (mm) | Tensile strength (KN) | Weight per meter (kg/m) |
British system series | X348 | 76.6 | 12.7 | 47 | 3050.5/3095.2 | 40 | 9 | 27 | 98 | 2.7 |
X458 | 102.4 | 16 | 58 | 3063.1/3090.2 | 30 | 9 | 35 | 187 | 5.2 | |
468H | 102.4 | 19.5 | 84.1 | 3063.1/3090.2 | 30 | 9 | 47.8 | 311.7 | 11.5 | |
X678 | 153.2 | 22.3 | 77 | 3055.1/3082.8 | 20 | 7 | 51.6 | 318 | 9.5 | |
698 | 153.2 | 28 | 95.3 | 3055.1/3082.8 | 20 | 7 | 60 | 515 | 17 | |
698H | 152.4 | 39 | 154 | 3039.2/3066.6 | 20 | 7 | 72 | 1078 | 37.7 | |
Metric system series | F100X16 | 100 | 15.5 | 77 | 2991.3/3018.3 | 30 | 9 | 35 | 187 | 4.7 |
F100X17 | 100 | 17 | 77 | 2991.3/3018.3 | 30 | 9 | 35 | 187 | 4 | |
F160X24 | 160 | 23.5 | 96 | 3190.7/3219.5 | 20 | 7 | 51.6 | 318 | 10.3 | |
British system series | X348 | 76.6 | 12.7 | 47 | 3050.5/3095.2 | 40 | 9 | 27 | 98 | 2.7 |
X458 | 102.4 | 16 | 58 | 3063.1/3090.2 | 30 | 9 | 35 | 187 | 5.2 | |
468H | 102.4 | 19.5 | 84.1 | 3063.1/3090.2 | 30 | 9 | 47.8 | 311.7 | 11.5 | |
X678 | 153.2 | 22.3 | 77 | 3055.1/3082.8 | 20 | 7 | 51.6 | 318 | 9.5 | |
698 | 153.2 | 28 | 95.3 | 3055.1/3082.8 | 20 | 7 | 60 | 515 | 17 | |
698H | 152.4 | 39 | 154 | 3039.2/3066.6 | 20 | 7 | 72 | 1078 | 37.7 | |
Metric system series | F100X16 | 100 | 15.5 | 77 | 2991.3/3018.3 | 30 | 9 | 35 | 187 | 4.7 |
F100X17 | 100 | 17 | 77 | 2991.3/3018.3 | 30 | 9 | 35 | 187 | 4 | |
F160X24 | 160 | 23.5 | 96 | 3190.7/3219.5 | 20 | 7 | 51.6 | 318 | 10.3 |
Our drop forged chains utilize automatic welding technology, high-frequency heating treatment, and corrosion-resistant surface processes, have a longer lifespan compared to ordinary chains, especially in environments with severe wear and harsh conditions.
Suitable for various operating speed ranges, it can run stably whether at low speeds for precise conveyance or at medium to high speeds for grain processing, thus avoiding chain damage or reduced transmission efficiency due to mismatched speeds.
Designed for extreme environments, our drop forged chains can operate across a wide temperature range, from -40°C to +300°C.
Thanks to precise surface treatment processes, our drop forged chainss have excellent corrosion resistance, making them particularly suitable for environments with high humidity and strong corrosive conditions.
Using high-frequency heating and surface reinforcement, long-term use ensures no significant wear or performance degradation.
Precise welding techniques and stable structural design reduce friction and collisions between chains, thereby lowering mechanical noise and improving the working environment in factories.
Overhead & Trolley Conveyors: Ideal for automotive lines, assembly systems, and enclosed track conveyors with complex routing.
Drag & Bulk Material Conveyors: Handles coal, ash, cement, minerals and other bulk materials in en-masse or trough conveyors.
Steel, Mining & Heavy Industry: Suited for rugged environments requiring high strength and wear tolerance.
Manufacturing & Assembly Lines: Efficient for product transfer and material movement in industrial production systems.
As leading drop forged chains manufacturer, DONGCHUAN has obtained multiple international quality certifications, including ISO 9001 and CE certification. Each batch of products undergoes rigorous quality control and testing to ensure compliance with industry standards and provide reliable quality assurance to customers.
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Our company has successfully obtained API and ISO 9001 certifications, ensuring that all products meet international standards.
DONGCHUAN drop forged chainss establish extensive collaboration with Changzhou University, for Digital Design and Production Engineering of Chain Transmission. we have significantly improved production efficiency and effectively reduced production costs.
In the course of more than 10 years of operation, we have provided consistent quality and cost-effective products to more than 40 countries and regions around the world, and won a wide range of trust and praise.
Committed to technological innovation and continuous improvement, we consistently stay at the forefront of industry technology development.
We focus not only on short-term cooperation but also on establishing long-term, stable partnerships with our clients.Our products come with a warranty period of up to 24 months.
A1: A Drop Forged Chain is manufactured by forging alloy steel links and heat treating them for superior strength, wear resistance, and durability compared with conventional welded conveyor chains.
4B Components
A2: These codes represent standard chain sizes/pitch formats of Drop Forged Chain, with increasing pitch and load capacity — X348 for lighter to medium loads, X458 for medium to heavy, X678 for heavy industrial conveyor use.
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A3: Yes, versions like rivetless X-type designs support multidirectional flexibility, suitable for horizontal, incline, and vertical runs.
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A4: Regular lubrication, tension checks, and inspection for wear or fatigue on links and pins help ensure long service life and reliable operation.