H Transfer Rooftop Цепи, also known as camelback or rooftop chains, are heavy-duty conveyor chains designed for transferring bulk materials like lumber, boxes, barrels, and crates in industries such as forestry, packaging, and manufacturing. Typically used in troughs with two or more parallel strands, only the bevel tops of the links protrude, allowing transverse loading and unloading. Constructed from high-strength materials or malleable iron, they feature riveted designs with tensile strengths ranging from 11,700 to 30,000 pounds. Models like H78A, H78B, H130, H131, and H138 vary in roof shape (peaked or flat) and are built for one-directional operation at speeds up to 100 feet per minute, ensuring durability in abrasive environments.
H Transfer Rooftop Chain Dimensions
| Chain No. | Pitch in Inches | Style of Top | Links Per 10 Feet | Weight Per Foot LBS. | Average Ultimate Strength Load LBS. | Recommended Maximum Working Load LBS. | Ar | Br | C | Db | Dp | E | E1 | F | J | P | W |
| H78A | 2.609 | А | 46 | 5.6 | 16,000 | 2.820 | 3.25 | 1.62 | 1.56 | 0.88 | 0.5 | 1.12 | 1.88 | 1.00 | 1.12 | 1.69 | 2.81 |
| H78B | 2.609 | B | 46 | 6.1 | 16,000 | 2.820 | 3.25 | 1.62 | 1.56 | 0.88 | 0.5 | 1.12 | 1.88 | 1.00 | 1.12 | 1.69 | 2.81 |
| H130 | 4.000 | А | 30 | 5.2 | 14,000 | 2.440 | 3.25 | 1.62 | 1.62 | 1.00 | 0.5 | 1.00 | 1.62 | 1.06 | 1.16 | 1.69 | 2.81 |
| H131 | 4.000 | А | 30 | 8.4 | 24,000 | 4.700 | 4.00 | 2.06 | 1.94 | 1.25 | 0.625 | 1.62 | 2.50 | 1.56 | 1.47 | 2.25 | 3.44 |
| H138 | 4.000 | B | 30 | 5.8 | 16,000 | 2.440 | 3.25 | 1.62 | 1.62 | 1.00 | 0.5 | 1.00 | 1.62 | 1.06 | 1.16 | 1.69 | 2.81 |
Types of H Transfer Rooftop Chains
We stock and deliver rooftop chains in different styles: H78, H130, H138, C55 and our most popular 81X. Depending on what you intend to accomplish, you may decide to use a specific style of rooftop chain.
H78A Rooftop Transfer Chain: The H78A chain is a heavy-duty and durable rooftop transfer chain with a tensile strength of 19,500 lbs. The H78 rooftop chain finds application in lumber mills where it is used to transfer lumber. Something notable about this chain is its fully heat-treated construction. Due to this, the chain has much higher strength and working life.
H78B Rooftop Transfer Chain: The H78B chain is a heavy-duty and durable chain like the H78A but with a tensile strength of 20,800 lbs. This chain, like others in the H-Series, is manufactured to perform and hold up in transfer conveyor applications, as well as abrasive atmospheres.
H130 Rooftop Transfer Chain: The H130 chain is a strong and durable rooftop transfer chain. It has a tensile strength of 18,200 lbs, making it a solid mid-range chain that has been used for decades and is trusted by many.
C55 Rooftop Transfer Chain: The C55 rooftop chain is a cast combination chain that has a variety of uses. It is a high-quality, durable and long-lasting conveyor chain that is manufactured using high-quality components. The C55 rooftop chain is used in a wide range of applications such as bucket elevators, flight conveyors, forest products, grain handling and sugar processing. C55A rooftop chain links are symmetrical and can travel in either direction. This chain is supplied as a riveted construction equipped with pinheads on the same side. The tensile strength is 117,000 lbs.
81X Rooftop Transfer Chain: The 81X rooftop chain is a roof-top style conveying chain designed to convey heavy loads from one point to another. It's one of the most commonly used conveyor-type chains used in the lumber and aggregate industries because of its extremely rugged design. This design boasts high-quality, heat-treated, shot-peened steel components for optimal strength, durability and fatigue resistance. Our 81X chains meet the standards required of an ideal steel bushed roller (SBR) chain, made with solid bushings and sturdy rollers because of the highly prolonged wear life and performance that comes from this design. The tensile strength of the 81X is 30,000 lbs.
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Applications of H Transfer Rooftop Chains
The rooftop transfer chain is most often intended for operation in troughs, in two or more parallel stands on transfer conveyors, with only the bevel tops of the links projecting about the guides. This permits transverse loading and unloading. The name “camelback chain” is used for this class of chain because of its ability to carry heavy concentrated loads, handle bulk material, and transport products. In industry, a rooftop transfer chain is the choice material to carry and transport lumber, boxes, barrels, crates, packages, barrels, bars and so on.
- Lumber Industry Conveyors: H Transfer Rooftop Chains are widely used in lumber mills to transfer heavy timber, logs, and processed wood across conveyor systems, ensuring efficient movement due to their high tensile strength and durability in abrasive environments.
- Rooftop Conveyors in Construction: These chains are employed in rooftop conveyor systems at construction sites to move heavy materials like bricks and lumber, offering robustness to handle concentrated loads in harsh outdoor conditions.
- Material Handling in Warehouses: In warehouse systems, H Transfer Rooftop Chains facilitate the movement of boxes, crates, and packages, supporting heavy loads and enabling transverse loading/unloading for efficient logistics and distribution processes.
- Mining and Quarrying Operations: Used in mining and quarrying, these chains transport heavy materials like coal and ore, withstanding abrasive conditions and high loads, ensuring reliable performance in rugged, demanding environments.
- Industrial Paint Mixing Facilities: H Transfer Rooftop Chains, such as the H78B, transfer viscous paint in corrosive environments, with oil-impregnated bushings ensuring maintenance-free operation and resistance to high temperatures and humidity.
- Packaging Industry Applications: These chains are utilized in packaging lines to convey barrels, crates, and boxes, designed for trough operation with protruding link tops, allowing transverse loading for streamlined processes.
- Forestry Product Handling: In forestry, H Transfer Rooftop Chains move bulk materials like wood chips and logs, leveraging their high-strength design to handle concentrated loads in abrasive, outdoor settings efficiently.
