Cast Steel Track Shoes for Crawler Mining and Construction Equipment
Track shoes—also called track pads or track plates—are the ground contact elements of a crawler undercarriage. Bolted to the track links, they distribute the machine weight over the ground contact area, provide traction for propulsion and grading operations, and protect the track links from direct ground abrasion. In mining environments—where operating surfaces range from soft overburden to blasted rock, competent hard floor, and abrasive ore body material—track shoe design and material quality directly determine the undercarriage service life between major overhauls.
Mine Components produces cast steel track shoes for crawler excavators, hydraulic mining shovels, draglines, bulldozers, pipe layers, and tracked heavy lift equipment. We manufacture to OEM drawing equivalents and to custom specifications for non-standard or specialized equipment.
Applications and Equipment Types
Hydraulic mining excavators and shovels — operating on hard rock benches in open-cut mines, these machines impose the most severe loading on track shoes: high ground-bearing pressure from machine weight, abrasion from hard rock surfaces, and impact from rock fragments caught under the shoe during travel. Track shoe service life on hard rock benches can be significantly shorter than manufacturer estimates based on soft ground operating assumptions, making material and geometry selection critical to managing undercarriage costs.
Crawler bulldozers (dozers) — used for overburden stripping, ripping, and push-loading operations. Dozer track shoes are subject to high drawbar pull forces that stress the shoe-to-link bolted connection, and to abrasion from soil, gravel, and rock being displaced by the blade. Single-grouser and multi-grouser shoe designs are available depending on the operating surface and traction requirements.
Draglines — large dragline excavators use track shoes on an extremely large and heavy undercarriage that walks the machine across the mine bench. Dragline track shoes must distribute the enormous machine weight (some draglines exceed 8,000 tonnes) over competent ground with minimal track damage. Shoe width is a critical parameter, and custom-width shoes are sometimes required for machines that have been modified from their original configuration.
Tracked lifting and pipe-laying equipment — specialized crawler equipment for construction, pipeline, and installation work. Track shoes for these applications are often required in non-standard widths and with specific bolt patterns that are no longer supplied by the original equipment manufacturer.
Grouser Profile Options
The grouser—the raised rib or pattern on the ground-contact face of the track shoe—determines traction, turning resistance, and ground disturbance. We produce the following grouser configurations:
Single grouser (one central rib) — the standard configuration for most crawler mining equipment. Provides good traction in firm ground conditions and allows clean material release from the grouser as the shoe exits the ground. Suitable for hard rock bench and general mining floor surfaces.
Triple grouser (three parallel ribs) — provides better traction in soft or loose ground by increasing the ground engagement area. More common in dozer and lifting equipment applications on soft overburden or loose fill. Triple grouser shoes produce higher turning resistance than single grouser, which increases track and sprocket wear on machines that perform frequent turns.
Flat shoes (road liner) — used when operating on concrete, asphalt, or other finished surfaces where grouser shoes would cause surface damage. Flat shoes are typically rubber-padded or steel flat, with low ground pressure. Not suitable for production mining environments.
Custom grouser profiles — for machines with specific traction or ground disturbance requirements, or for replacement of shoes with non-standard grouser geometry. We produce custom profiles to client drawings or to measurements taken from worn originals.
Material and Heat Treatment
Track shoes for mining equipment are produced in boron alloy steel or chromium-molybdenum alloy steel, heat-treated by quenching and tempering to achieve surface hardness in the range of 350–450 HB with a tough core that resists fracture under impact loading from rock fragments. The combination of hard surface and tough core is essential: a shoe that is uniformly hard will fracture under point impact loading; a shoe that is uniformly tough will wear rapidly in abrasive conditions.
We produce track shoes in the following material options:
Boron alloy steel, quenched and tempered (370–420 HB) — the standard material for most crawler mining and construction equipment. Provides the balance of wear resistance and toughness required for typical mine floor conditions. Widely used because it machines cleanly for bolt hole drilling and is compatible with standard bolt torque specifications.
Chrome-molybdenum alloy steel, quenched and tempered (420–460 HB) — for applications on highly abrasive surfaces (blasted quartzite, iron ore, hard rock mine floors) where standard boron alloy shoes wear at an unacceptably high rate. Higher hardness reduces ductility and requires careful handling during installation to avoid edge chipping from impact.
Manganese steel — used in specific applications where very high impact loading is present and where the work-hardening characteristic of manganese steel provides progressive hardening during service. Less common than alloy steel for track shoes but effective in high-impact underground haulage applications.
Dimensional Accuracy and Bolt Pattern
Track shoes must fit the track links without modification and must allow the mounting bolts to be correctly torqued to the OEM specification. Dimensional deviations in the bolt hole pattern, shoe width, or shoe-to-link interface geometry result in installation difficulty, incorrect bolt stress, or shoe movement relative to the link during operation—which accelerates link wear and can cause premature bolt fatigue failure.
We produce shoes to the dimensional specification of the OEM drawing or client-supplied equivalent, and inspect bolt hole positions and critical dimensions after machining. For shoes being manufactured to match a worn original, we identify and document which dimensions are derived from measurement and which are confirmed from a drawing source.
Supply: New Equipment and Replacement
We supply track shoes for both new equipment builds and as replacement components for machines in service. For equipment in service, we can produce replacement shoes compatible with the existing track link set, allowing individual shoe replacement rather than full undercarriage renewal when the shoes have worn before the links reach their service limit.
For obsolete equipment models where OEM replacement shoes are no longer available, we have produced replacement shoes for a range of older excavator and dozer models. Contact our engineering team with the machine model, serial number, and any available dimensional data for a feasibility assessment.
Quality Assurance
Each track shoe delivery is accompanied by: material test certificate (chemical composition and mechanical properties), heat treatment records, dimensional inspection records including bolt hole position verification, hardness test results at shoe surface and where specified at cross-section, and batch traceability to the production heat. NDT (magnetic particle inspection) is available on request.
Ordering and Lead Times
Standard track shoes for common excavator and dozer models: 4–6 weeks. Custom dimensions, non-standard grouser profiles, or large shoes (above 150 kg each) for dragline or large mining shovel applications: 6–10 weeks. For undercarriage overhaul projects requiring a complete set of shoes, provide the machine model and current shoe dimensions for a production schedule assessment.
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Related Heavy Cast Steel Components
Clients sourcing track shoes also frequently require other undercarriage and structural cast components. See our full Heavy Cast Steel Components range, including Industrial Housings and Planetary Carriers for drive system components.