In industrial conveyor systems and agricultural machinery, long pin chains are always a top choice thanks to their ability to operate reliably over extended distances. Unlike standard industrial chains, this type features an extended pitch design that reduces friction and significantly lowers operating costs. Let's take a closer look at the structure, advantages, and applications of this specialized chain.
What Is a Long Pin Chain?
A long pin chain is a variant of the standard industrial roller chain, with its defining characteristic being a longer pitch compared to conventional chain types. It is designed to solve the challenge of transmitting force or motion over long distances at moderate speeds, while maintaining high durability and strong load-bearing capacity.
Technical Construction
At its core, the long pin chain retains the same fundamental structure as a standard roller chain:
- Pin: A hardened alloy steel rod that serves as the primary load-bearing axle, connecting the chain links together.
- Roller: The component that makes direct contact with the sprocket, converting sliding friction into rolling friction to minimize wear.
- Bushing: A sleeve positioned between the pin and roller, ensuring smooth and quiet chain operation.
- Link Plates: Consisting of inner and outer plates that form the structural backbone of the chain.
- Key difference: The link plates are extended, increasing the distance between two pins. This reduces the number of components (rollers, pins) per meter of chain length, thereby lowering the overall weight.
Operating Principle & Key Specifications
How It Works
The long pin chain operates on the mechanical engagement between the rollers and the teeth of a specially matched sprocket (typically a double-pitch sprocket). As the drive shaft rotates, pulling force is transmitted smoothly thanks to the low friction coefficient.
Important Parameters to Consider When Selecting a Long Pin Chain
To choose the right chain for your machinery, pay attention to the following:
- Pitch (P): The chain pitch — the distance between the centers of two pins.
- Roller Diameter (d1): The outer diameter of the roller.
- Tensile Strength: The maximum breaking load.
- Allowable Load: The permitted working load under normal operating conditions.
Reference Table: Common Long Pin Chain Specifications
| Type | Pitch (P) | Roller W | Roller D | Pin d | Pin A | Pin B | Plate T | Plate H | Pin Length DH | Pin Length L | Attach. Weight D-1 | Attach. Weight D-3 | Links/m |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KCM 35 | 9.525 | 4.78 | *5.08 | 3.59 | 5.77 | 7.28 | 1.25 | 8.8 | 9.52 | 14.5 | 0.0007 | 0.0014 | 320 |
| KCM 40 | 12.7 | 7.95 | 7.95 | 3.97 | 8.07 | 9.48 | 1.5 | 11.7 | 9.52 | 16.6 | 0.0009 | 0.0018 | 240 |
| KCM 50 | 15.875 | 9.53 | 10.16 | 5.09 | 10.17 | 11.63 | 2.0 | 14.6 | 11.91 | 20.9 | 0.0017 | 0.0034 | 192 |
| KCM 60 | 19.05 | 12.7 | 11.91 | 5.96 | 12.7 | 14.2 | 2.4 | 17.5 | 14.27 | 25.6 | 0.0034 | 0.0060 | 160 |
| KCM 80 | 25.4 | 15.88 | 15.88 | 7.94 | 16.15 | 19.25 | 3.2 | 23.0 | 19.05 | 33.6 | 0.0070 | 0.0140 | 120 |
| KCM 100 | 31.75 | 19.05 | 19.05 | 9.54 | 20.10 | 23.05 | 4.0 | 28.9 | 23.83 | 41.6 | 0.0120 | 0.0240 | 96 |
| KCM 120 | 38.10 | 25.4 | 22.23 | 11.11 | 25.20 | 28.60 | 4.8 | 35.0 | 28.58 | 51.2 | 0.0200 | 0.0400 | 80 |
| KCM 140 | 44.45 | 25.4 | 25.4 | 12.71 | 27.30 | 31.30 | 5.6 | 40.7 | 33.32 | 57.6 | 0.0300 | 0.0600 | 68 |
| KCM 160 | 50.80 | 31.75 | 28.58 | 14.29 | 32.45 | 37.15 | 6.4 | 46.7 | 38.10 | 67.3 | 0.0440 | 0.0800 | 60 |
Why Choose a Long Pin Chain?
Here are the four standout advantages that make long pin chains a preferred choice in power transmission:
- Efficiency over long distances: The extended pitch design reduces the number of joints, minimizing cumulative chain elongation on conveyors stretching tens of meters in length.
- Reduced friction and energy savings: Fewer chain links mean less friction generated, allowing the motor to run more smoothly and consume less electricity.
- High durability: When properly maintained, long pin chains offer excellent service life thanks to their load-bearing alloy steel construction.
- Versatility: Easy to install and compatible with a wide range of conveyor accessories such as bucket attachments and scraper bars.
Real-World Applications Across Industries
- Agriculture: An essential component in combine harvesters, plows, and soil cultivators.
- Food Processing: Powers drying conveyors, packaging lines, and vegetable washing systems.
- Heavy Industry: Used in lifting systems and production lines for wood, paper, and pulp processing.
- Warehousing & Logistics: Drives conveyor systems handling cartons and pallets inside manufacturing facilities.
Where to Buy Reliable Long Pin Chains?
Finding a supplier that provides industrial chains with accurate specifications and clear origins is a critical factor in ensuring factory productivity. Belota is proud to be a trusted supply partner offering a wide range of long pin chains compliant with ANSI and ISO standards.
Conclusion
Investing in a high-quality drive system is the most effective way to optimize long-term production costs. With deep industry expertise and a comprehensive product inventory, Belota is committed to delivering the most durable material solutions for your business. Contact us now via Hotline/Zalo 0917 657 946 for technical consultation and a competitive quote on long pin chains today!
