An excavator track chain, also known as a track link assembly, is a crucial component of the undercarriage system of an excavator. It is responsible for supporting the weight of the excavator, providing traction, and enabling smooth movement over various terrains.
The track chain consists of a series of interconnected track links that form a continuous loop. Each track link is typically made of high-strength steel and has a specific design to ensure durability and reliable performance. The links are joined together by pins and bushings, allowing them to articulate and flex as the excavator moves.
The track chain is guided and driven by the sprockets and idlers located at either end of the undercarriage. The sprockets engage with the track links' drive lugs, propelling the excavator forward or backward when they rotate. The idlers help maintain tension in the track chain and guide it along the undercarriage.
Excavator track chains are exposed to significant forces, wear, and external elements during operation. Therefore, they are designed to be robust, resistant to abrasion, and capable of withstanding heavy loads. Regular maintenance, including lubrication and inspection, is essential to ensure the track chain's longevity and optimal performance.
When replacing or repairing an excavator track chain, it is crucial to consider the correct size, pitch, and configuration that match the specific excavator model and undercarriage system. Manufacturers and authorized dealers can provide the appropriate track chain options and guidance based on the excavator's specifications.
Types of excavator track chains
1. Sealed and Lubricated Track Chain (SALT): SALT track chains feature sealed and lubricated joints, which are pre-lubricated and sealed to prevent dirt, debris, and moisture from entering the link assembly. This design helps to prolong the life of the track chain by reducing internal wear and increasing durability.
2. Dry Track Chain: Dry track chains are not sealed or lubricated and rely on regular manual lubrication. They are typically more cost-effective but require more frequent maintenance to ensure proper lubrication and prevent premature wear.
3. Greased Track Chain: Greased track chains have lubrication points on the joints that require regular greasing. The grease helps to reduce friction, prevent wear, and enhance the longevity of the track chain. Greased track chains are commonly used in applications where regular maintenance intervals can be maintained.
4. Heavy-Duty Track Chain: Heavy-duty track chains are designed to withstand more demanding operating conditions, such as rocky or abrasive terrains. They are made with higher-grade materials and have reinforced components to provide increased strength, durability, and resistance to wear.
5. Swamp Track Chain: Swamp track chains, also known as swamp pads or marsh pads, are designed for excavators operating in soft, muddy, or swampy terrains. They feature wider track shoes or pads that distribute the machine's weight over a larger surface area, reducing the risk of sinking and improving traction.
6. Triple Grouser Track Chain: Triple grouser track chains have track shoes or pads with three raised protrusions, or grousers, that provide enhanced grip and traction. They are suitable for applications where the excavator needs additional traction in challenging terrains, such as loose soil or steep slopes.
7. Shoe-Type Track Chain: Shoe-type track chains are designed with integrated track shoes or pads. The track shoes are typically welded or bolted directly to the track chain links, forming a single unit. This type of track chain offers convenience in installation and replacement, as the track shoes and links are already assembled together.
8. Bolt-On Rubber Track Pad: Bolt-on rubber track pads are additional attachments that can be fitted onto standard track chains. These pads are made of durable rubber material and provide benefits such as reduced noise, improved traction, and protection of delicate surfaces. They are commonly used in applications where minimizing ground damage is necessary, such as on paved surfaces or sensitive areas.
9. Clip-On Track Pad: Clip-on track pads are similar to bolt-on rubber track pads but feature a clip or fastening mechanism for easy installation and removal. These pads can be quickly attached or detached from the track chain without the need for specialized tools. Clip-on track pads offer versatility and convenience, allowing operators to switch between different pad types based on the working conditions.
10. Ice Track Chain: Ice track chains are specifically designed for excavators operating in icy or extremely cold environments. These chains feature specialized studs or spikes on the track shoes, providing enhanced traction on icy surfaces. Ice track chains help improve stability and maneuverability in challenging winter conditions.
11. Variable Pitch Track Chain: Variable pitch track chains feature track shoes or pads with an adjustable pitch. The pitch refers to the distance between the grousers or raised protrusions on the track shoe. By adjusting the pitch, operators can optimize the excavator's performance and traction based on the specific operating conditions.
12. Steel Track Chain: Steel track chains are made entirely of steel and are highly durable and resistant to wear. They are commonly used in applications that involve heavy-duty work, such as mining or demolition, where the excavator is subjected to high impact and abrasive environments.
13. Rubber Track Chain: Rubber track chains feature rubberized track shoes or pads instead of traditional steel shoes. These chains are commonly used in compact or mini excavators to reduce ground damage, improve traction, and provide a smoother ride. Rubber track chains are particularly suitable for working on delicate surfaces or in urban areas where minimizing noise and surface impact is important.
14. Triple Labyrinth Seal Track Chain: Triple labyrinth seal track chains are designed with enhanced sealing mechanisms to prevent the entry of dirt, debris, and water into the track chain joints. The triple labyrinth seal system provides superior protection and helps to extend the life of the track chain, especially in harsh environments with high levels of contamination.
15. One-Piece Forged Track Chain: One-piece forged track chains are manufactured from a single piece of steel, resulting in increased strength and durability. These chains are commonly used in heavy-duty excavators that operate in demanding conditions, such as large construction projects or mining operations.
16. Hybrid Track Chain: Hybrid track chains combine the benefits of steel and rubber components. They feature a combination of steel track shoes or pads with rubberized inserts or lugs. This design provides improved traction, reduced ground pressure, and enhanced durability compared to traditional steel track chains.
17. Bolt-On Track Chain: Bolt-on track chains consist of individual track links that are bolted together to form the track chain assembly. This type of track chain offers flexibility in terms of replacing individual links when necessary, reducing maintenance costs.
18. Split Master Link Track Chain: Split master link track chains have a master link that can be opened or split, allowing for easy installation and removal of the track chain. This design simplifies track chain maintenance and replacement, saving time and effort.
19. Sealed Track Chain with Polyurethane Seals: Some track chains feature polyurethane seals in the joints, providing improved sealing against contaminants and extending the life of the track chain. These sealed track chains are designed to operate in environments with high levels of debris, dust, or moisture.
20. Reinforced Track Chain: Reinforced track chains are engineered with additional reinforcement in critical areas to enhance strength and durability. These chains are commonly used in demanding applications where the excavator is subjected to heavy loads, impact, or extreme operating conditions.
It's important to note that the availability of specific track chain types may vary depending on the excavator manufacturer, model, and regional preferences. It's always recommended to refer to the manufacturer's documentation or consult with an authorized dealer for accurate information on the types of track chains suitable for a particular excavator model.
Price ranges for different types of excavator track chains
1. Sealed and Lubricated Track Chain (SALT): $2,000 to $5,000 per set
2. Dry Track Chain: $1,500 to $3,000 per set
3. Greased Track Chain: $1,800 to $4,000 per set
4. Heavy-Duty Track Chain: $3,000 to $8,000 per set
5. Swamp Track Chain: $2,500 to $6,000 per set
6. Triple Grouser Track Chain: $2,000 to $5,000 per set
Please note that these price ranges are approximate and should be used as a general reference. Actual prices may vary based on the factors mentioned earlier. It's always recommended to obtain detailed quotes from manufacturers, authorized dealers, or specialized suppliers to get accurate pricing information for the specific track chain type you are interested in.
