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UNDER CARRIAGE Iran

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under carriage

Road base components include aggregates, stabilized soils, geotextiles, and asphalt concrete for constructing sub-base and base layers of roads. Aggregate particle size typically ranges from 5 to 50 mm with compressive strength of 50–250 MPa. Cement- or lime-stabilized soil has permeability of 10^-5 to 10^-7 m/s and shear strength of 150–300 kPa. Geotextiles made from polypropylene or polyester provide tensile strength of 20–60 kN/m. These components are designed to enhance stability, reduce settlement, and distribute load uniformly.

Structurally, the road base layers consist of 15–30 cm thick aggregate layers, 20–40 cm stabilized soil layers, and geotextile placement between layers. Aggregates are shaped and angled to maximize friction and prevent slippage. Final compaction is performed at 95–100 percent of standard Proctor. This design ensures heavy traffic load capacity, minimizes water infiltration, and provides long-term road durability, optimized for urban and intercity road construction projects.


Original-Komatsu	021-55422386-55422387

Original-Komatsu

Iran

021-55422386-55422387

under carriage

Road sub-base components include crushed and graded aggregates, stabilized soil, geotextiles, and asphalt concrete used for constructing base and sub-base layers. Aggregate particle size ranges from 5 to 50 mm with compressive strength of 50–250 MPa. Cement- or lime-stabilized soil has permeability of 10^-5 to 10^-7 m/s and shear strength of 150–300 kPa. Geotextiles made of polypropylene or polyester provide tensile strength of 20–60 kN/m to ensure stability, reduce settlement, and distribute load uniformly.

Structurally, the layering consists of 15–30 cm thick aggregate layers, 20–40 cm stabilized soil layers, and geotextile placement between layers. Aggregates are designed with appropriate angles and grooves to increase friction and reduce slippage. Final compaction is performed at 95–100 percent of standard Proctor. This design ensures heavy traffic load capacity, minimizes water infiltration, and provides long-term road durability, optimized for urban and intercity road projects.


Original-Komatsu	021-55422386-55422387

techno-liebherr

Iran

021-55777575

UNDER CARRIAGE

The undercarriage of bulldozers and excavators is the primary support and mobility system, designed for operation in tough soil and rocky environments. It includes a high-strength steel frame, reinforced tracks or tires, steel gears, and bearing rollers. Undercarriage width and length vary from 2 to 4 meters and 3 to 6 meters depending on operational weight. Roller load capacity typically reaches up to 150 tons. Pins and joints are made of high-hardness alloy steel for wear and impact resistance.

For excavators, the undercarriage connects to the boom and chassis through hydraulic joints for smooth movement. The hydraulic system includes high-pressure cylinders, abrasion-resistant hoses, and precise flow control valves. Rails and tracks are easily replaceable with a lifespan exceeding 5,000 operating hours. This structure is optimized for earthmoving, road construction, and heavy industrial projects, ensuring device stability and operator safety.