Custom Retractable Rubber Track Undercarriage with 300–400 mm Extension

Short Description:

YIJIANG manufactures custom hydraulic extendable track undercarriages with adjustable track width for drilling rigs, access platforms, lifting equipment and special machinery.

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Extendable Track Undercarriage Manufacturer

YIJIANG designs and manufactures custom extendable track undercarriages with hydraulic track-width adjustment for machinery that needs a compact transport configuration and a wider working stance.

Our variable-width crawler undercarriage systems can be engineered for drilling rigs, spider lifts, aerial work platforms, lifting equipment, crawler cranes, demolition robots and other special machinery.

Key Advantages

Hydraulic track-width adjustment
Typical extension travel of 300–400 mm on selected configurations
Rubber or steel track options
Custom mounting interface and center frame
Hydraulic drive systems available
Designed for narrow-access and stability-critical applications
OEM and ODM manufacturing
Custom engineering from one prototype to production orders

Primary Applications

Lift Winches
Spider Lifts
Aerical Work Platforms
Compact Lifting Equipment
Special Machinery

Typical extension travel of 300–400 mm on selected configurations

This retractable crawler undercarriage is designed with 300–400 mm of hydraulic extension travel, allowing the track assemblies to move between a narrower transport configuration and a wider working configuration.

Parameter	Specification
Retracted Width	850 mm
Extended Width	1250 mm
Extension Travel	300–400 mm

Why Use an Extendable Crawler Undercarriage?

A fixed crawler undercarriage provides one track width. An extendable design allows the machine to operate with different track-width configurations.

This is particularly useful when the machine must combine transportability with working stability.

Key Benefit	Description
Narrower Transport Width	The undercarriage can be retracted when the machine needs to pass through narrow entrances, gates, elevators, corridors or other restricted areas.
Wider Working Stance	After reaching the working position, the track assemblies can be extended to provide a wider support stance and improve machine stability.
Hydraulic Width Adjustment	Hydraulic cylinders and the associated telescopic frame structure allow the track width to be adjusted without manually removing or repositioning the track assemblies.
Custom Machine Integration	The center frame, mounting plate, hydraulic system, track width and connection structure can be designed around the upper machine, making the extendable crawler undercarriage suitable for OEM machinery and specialized equipment.

Extendable Track Undercarriage Specifications

There is no single standard specification for an extendable crawler undercarriage because the system is normally engineered around the customer's machine.

Typical engineering parameters include:

Parameter	Typical / Custom Configuration	Parameter	Typical / Custom Configuration
Undercarriage Type	Hydraulic Extendable / Retractable Crawler	Gradeability	Application dependent
Track Type	Rubber Track or Steel Track	Drive System	Hydraulic Motor
Extension Travel	300–400 mm on selected configurations	Hydraulic Extension	Hydraulic Cylinder / Telescopic Mechanism
Load Capacity	Application dependent	Mounting Interface	Custom
Track Width	Custom	Center Frame	Custom
Retracted Overall Width	Custom	Upper-Machine Connection	Custom
Extended Overall Width	Custom	Track Pattern	Standard, Non-Marking or Engineering Track
Ground Clearance	Custom	OEM / ODM	Available
Travel Speed	Application dependent	Prototype Quantity	From 1 set

Customization Options for This Undercarriage?

Every extendable crawler undercarriage project begins with the customer's machine requirements.

YIJIANG can customize the following major engineering parameters.

Parameter	Customization & Engineering Considerations
Track Width	Track width can be selected according to machine weight, ground pressure, terrain and required overall dimensions.
Extension Travel	The extension stroke determines the difference between the retracted and extended configurations. Common YIJIANG configurations use 300–400 mm of extension travel, while other values can be engineered when required.
Load Capacity	Undercarriage load capacity is calculated according to the machine's operating weight, working load, center of gravity and dynamic conditions. The rated capacity should be confirmed for each complete machine.
Mounting Interface	The upper mounting structure can be customized to match the customer's chassis, frame, slewing structure, mounting holes, bolts and connection points.
Hydraulic Drive System	Hydraulic travel motors, planetary drives and related hydraulic components can be selected according to the machine's required travel speed, torque and hydraulic system.
Center Frame & Cross Structure	The center frame connects the crawler assemblies and upper machine. Its dimensions and structural configuration can be customized to accommodate beams, platforms, slewing devices, hydraulic components and other equipment.
Track Type	Customers can select rubber tracks, non-marking rubber tracks or steel tracks according to the operating environment and machine requirements.
Ground Clearance	Ground clearance can be designed according to terrain conditions, obstacles and the required machine geometry.

How YIJIANG Manufactures Extendable Track Undercarriages

YIJIANG follows an engineering-led process for custom crawler undercarriage projects.

1. Requirement Analysis

Customers provide the machine weight, dimensions, required track width, extension travel, hydraulic requirements and working environment.

2. Structural Engineering

Our engineers determine the crawler frame structure, extension mechanism, mounting interface and drive system.

3. CAD and 3D Design

The undercarriage is developed using engineering drawings and 3D CAD models for dimensional confirmation and machine integration.

4. Component Manufacturing

Frame components, track systems, drive components and hydraulic mechanisms are manufactured according to the approved design.

5. Assembly and Testing

The completed crawler undercarriage is assembled and inspected before shipment.

Testing and inspection focus on dimensions, movement, hydraulic operation, track alignment and overall structural performance.

6. Delivery and Technical Support

The finished undercarriage is prepared for international transportation and supplied with the necessary technical information for machine integration.

Extendable Track Undercarriage FAQ

Q: Can you customize an extendable track undercarriage?

A: Yes. YIJIANG manufactures custom extendable crawler undercarriages according to machine weight, dimensions, required track width, extension travel, hydraulic requirements and mounting interface.

Q: What is the typical extension travel?

A: Selected YIJIANG extendable crawler configurations use approximately 300–400 mm of extension travel. The actual travel can be customized according to the required retracted and working widths.

Q: Can you manufacture an extendable undercarriage according to our drawings?

A: Yes. Customer drawings, CAD files, dimensions and machine photographs can be used as engineering references. Our engineers can review the interface and develop the crawler chassis around the upper machine.

Q: What load capacity can an extendable crawler undercarriage handle?

A: Load capacity depends on the complete machine configuration, including machine weight, working load, center of gravity, frame structure and operating conditions. YIJIANG has existing extendable configurations across different capacity ranges and can engineer the chassis according to the required application.

Q: Can I order one custom extendable undercarriage?

A: Yes. YIJIANG supports custom prototype and small-quantity orders, including projects requiring only one crawler undercarriage.

Q: Are hydraulic drive motors included?

A: Hydraulic travel motors can be integrated into the crawler undercarriage. Motor specifications are selected according to machine weight, travel speed, required torque and the customer's hydraulic system.

Q: How long does a custom extendable undercarriage take?

A: Production time depends on the design complexity, quantity, component availability and engineering requirements. The delivery schedule is confirmed after the technical design and order specifications are finalized.