Undercarriage spare parts for excavator

Introduction to towed Undercarriage spare parts for excavator

A towed excavator, also known as a tracked or tire mobile excavator, is a type of heavy equipment that is widely used in the construction and mining sectors.Undercarriage spare parts for excavator refers to a variety of parts that are used to maintain, repair, or replace worn-out parts of this machine.

Features and advantages of towed Undercarriage spare parts for excavator

Durability: made of high-quality materials to ensure long life and high durability.

Compatibility: Designed to meet OEM specifications for a wide range of makes and models.

Economical: Third-party spare parts are usually less expensive compared to OEM parts.

Ease of Replacement: Standardised design allows for quick and easy installation and replacement.

Reliability: rigorously tested to ensure stable and reliable performance.

(Undercarriage spare parts for excavator)

Specification of Undercarriage spare parts for excavator

The undercarriage spare parts for excavators are critical components designed to ensure optimal performance, durability, and stability of heavy machinery in demanding environments. These parts include track chains, sprockets, rollers, idlers, and track shoes, each engineered to withstand high stress, abrasion, and heavy loads. Below are detailed specifications for these components:

Track Chains: Constructed from high-grade alloy steel, track chains feature a hardened surface for wear resistance. Standard pitch sizes range from 170mm to 216mm, with pin and bushing diameters between 45mm and 55mm. Hardness levels reach 55-60 HRC (Rockwell C scale) for extended service life. Tensile strength exceeds 1500 MPa to handle heavy loads without deformation.

Sprockets: Precision-machined sprockets are heat-treated for durability, with tooth profiles matching track chain pitch specifications. Common tooth counts range from 9 to 12, depending on excavator model. Material composition includes forged steel or ductile iron, hardened to 50-55 HRC. Flange diameters vary between 500mm and 800mm, ensuring smooth engagement with track links.

Rollers (Carrier and Track): These components feature sealed, lubricated bearings to minimize friction and prevent contamination. Roller diameters range from 150mm to 200mm, with widths of 70-120mm. Hardness levels are maintained at 55-60 HRC for resistance to ground impacts. Load capacity ranges from 10,000 to 20,000 lbs, depending on excavator size.

Idlers: Front idlers guide the track chain and absorb shocks. They are built with high-carbon steel, hardened to 55-60 HRC, and include replaceable flange rings. Diameters range from 150mm to 250mm, with widths matching roller specifications. Sealed bearings ensure longevity in muddy or dusty conditions.

Track Shoes: Available in single, double, or triple grouser configurations, track shoes are made from high-tensile steel with hardness levels of 350-450 BHN (Brinell Hardness Number). Shoe widths vary from 400mm to 800mm, with thicknesses of 40-60mm. Bolt-hole patterns correspond to standard track chain layouts for easy replacement.

General Specifications: All undercarriage parts comply with ISO 9001 standards for quality assurance. Materials are corrosion-treated with phosphate or epoxy coatings. Compatibility spans major excavator brands (e.g., CAT, Komatsu, Hitachi). Operating temperature tolerance ranges from -30°C to 120°C. These components are interchangeable with OEM parts, ensuring seamless integration and reliable performance in mining, construction, and forestry applications. Regular maintenance of undercarriage systems enhances machine efficiency and reduces downtime.

(Undercarriage spare parts for excavator)

Applications of Undercarriage spare parts for excavator

Undercarriage spare parts for excavators are critical components that ensure the machine’s stability, mobility, and durability in demanding environments. These parts support the excavator’s weight, absorb shocks, and enable smooth operation across diverse terrains. Key undercarriage components include track chains, track shoes, rollers, idlers, sprockets, and bushings, each serving distinct functions.

Track Chains and Shoes form the foundation of the excavator’s movement. Track chains link the undercarriage system, while track shoes (pads) provide traction. Their applications are vital in construction, mining, and forestry, where they navigate mud, rocks, and uneven surfaces. For example, in mining, heavy-duty track shoes prevent slippage on abrasive terrain, while in agriculture, wider shoes reduce ground pressure on soft soil.

Rollers (carrier and track rollers) distribute the excavator’s weight and maintain track tension. In large-scale earthmoving projects, rollers ensure smooth travel under heavy loads, minimizing wear. Track rollers guide the track chain, crucial for stability during digging or lifting operations.

Idlers and Sprockets guide and drive the tracks. Front idlers maintain track alignment, especially during sharp turns on construction sites. Sprockets mesh with track chains to transfer engine power into motion, essential for tasks like demolition, where precise movement is required.

Bushings and Pins secure track chain links, reducing friction and wear. Regular replacement prevents chain elongation, which can lead to derailment or inefficient power transfer.

Applications of undercarriage parts span industries: In mining, reinforced components withstand harsh, rocky environments. In urban construction, durable tracks and rollers enable operation on paved surfaces without damage. For forestry, specialized shoes prevent soil compaction in sensitive ecosystems.

Maintaining undercarriage parts reduces downtime and extends excavator lifespan. Worn parts increase fuel consumption and strain on other components. Timely replacement of rollers, sprockets, or track shoes ensures optimal performance, lowers operating costs, and enhances safety.

Quality undercarriage spare parts are engineered for resilience, offering resistance to abrasion, corrosion, and high impact. Investing in genuine components guarantees compatibility and reliability, ensuring excavators operate efficiently in any condition, from rugged quarries to dense urban job sites.

Company Introduction

Established in 2007, Excavator Attachments Heavy Machinery Co.,ltd. focus on metal research and mining machinery spare parts. 2 factories over an area of 13,300 square meters, based on 100+ sets of equipment, our production capacity reaches 12000 Tons/Year. has passed ISO 9001 quality managment system certification in 2008.

Our mainly products are dragline excavator spare parts,rotary kiln spare parts, large modulus gear (gear shaft), gearbox ect. 40+ patents with over 45 years experience to help focus on improve the service life of spare parts. We belive that more than 80% reason of mechanical parts’ working life depends on hot processing (steel making/forging/casting/welding/heat treatment). Eight material engineers will control the quality from the original resource.

If you are interested, please feel free to contact us.

5 FAQs of Undercarriage spare parts for excavator

1. What are the main components of an excavator undercarriage?
The primary undercarriage parts include track chains, track shoes (pads), rollers (carrier and track rollers), idlers, sprockets, and bolts/bushings. These components work together to support the excavator’s weight, ensure smooth movement, and distribute stress during operation. Regular inspection of these parts is critical to maintain stability and prevent breakdowns.

2. How often should undercarriage parts be inspected or replaced?
Inspection intervals depend on usage intensity and operating conditions. Generally, check undercarriage parts every 250–500 hours of operation. Replace components like track shoes, rollers, or sprockets when wear exceeds 10–15% of their original thickness. Always follow the manufacturer’s guidelines and adjust schedules for harsh environments (e.g., rocky terrain or wet conditions) to avoid unexpected failures.

3. What are the signs of undercarriage wear or damage?
Common signs include uneven track shoe wear, elongated track links, excessive noise during movement, visible cracks in rollers or idlers, and misaligned tracks. Reduced maneuverability or increased fuel consumption may also indicate issues. Address these symptoms immediately to prevent further damage to the excavator’s frame or hydraulic systems.

4. Can I mix OEM and aftermarket undercarriage parts?
While mixing parts is possible, it’s not recommended. OEM parts are engineered for compatibility and durability, while aftermarket components may vary in quality or dimensions. Mismatched parts can accelerate wear, reduce performance, and void warranties. Always consult your equipment manual or a technician to ensure parts meet specifications.

5. How does terrain affect undercarriage lifespan?
Abrasive surfaces like rocks or gravel accelerate wear on track shoes and rollers. Muddy or wet conditions promote corrosion and track slippage, while uneven terrain strains sprockets and idlers. Use terrain-specific undercarriage configurations (e.g., wide pads for soft ground) and clean debris regularly to prolong component life. Lubricate bushings and adjust track tension to minimize stress.

(Undercarriage spare parts for excavator)