Surface Down The Hole Crawler Mounted YUCHAI Power Drilling Rig Compact Size Design

>> Products Description

Designed for medium-depth drilling with enhanced operational flexibility, JC712 supports drilling depths up to 35meters, catering to a broad range of geological conditions. Its adaptable drilling rod lengths (2000mm or 3000mm) and hole diameter range of φ90 to 140mm provide versatile solutions for construction, water well drilling, and geological exploration. The rig features a 12-core dry-type dust collection system, enhancing environmental compliance and operator safety by minimizing airborne particulates. Combined with the machine's sturdy build and userfriendly control interface, makes JC712 a dependable. With a total weight of 5.3tons and compact transport dimensions of 5550×2290×2600 mm, JC712 offers excellent mobility and site accessibility. Its 35°climbing capacity and 450mm ground clearance enable operation on rugged terrain, while the optional winch adds. The rig delivers a powerful maximum rotary torque of2500N·m at variable speeds up to 140rpm, ensuring efficient rock penetration and stable hole formation. The robust hydraulic oil cylinder feed system offers a 3340mm stroke and 900mm extension with 15kN feeding force and 25kN lifting capacity, enabling smooth and controlled rod handling during drilling. Powered by a reliable Yuchai YC4A100-T20 diesel engine rated at 70kW, JC712 balances power and fuel efficiency supported by a 70-liter fuel tank. Its pneumatic system requires an air compressor capable of supplying 10-18m³/min at 0.7-1.8MPa, suitable for a variety of air supply conditions.versatility for demanding environments. Choice for efficient, clean, and flexible drilling operations.

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>> Features

>> Control System: Integrated rear control panel with intuitive layout simplifies drilling operations. User centered design ensures comfortable handling and easy access to core controls during complex tasks.
>> Power System: Equipped with a 70 kW Yuchai YC4A100-T20 engine. Combines 10-18m³/min air flow and 0.7-1.8 MPa pressure for flexible compatibility with both 3" and 4" hammers in various rock layers.
>> Rotation & Feed Mechanism: Dual-motor rotary head delivers up to 2500N·m torque with smooth hydraulic dual-speed shifting. Oil-cylinder feed system offers 3340mm stroke and 15kN pushing force for stable hole-forming efficiency.
>> Drilling Flexibility: Supports φ90-140mm hole diameter with φ64 rods in 2000mm or 3000mm lengths, offering adaptable configurations for different terrain and space limitations.
>> Mobility & Maintenance: Rugged undercarriage ensures 35° climbing capacity even when towing a compressor. Compact 5278kg structure with streamlined hood design makes transport and maintenance easier on challenging job sites

>> Application

Foundation Drilling in Urban and Suburban Areas
With a drilling depth of up to 35 meters and flexible rod options (φ64×2000/3000 mm), JC712 is ideal for residential, commercial, and municipal foundation works. The rig’s compact design (5.5 m transport length) and powerful torque make it suitable for limited-space jobs like basement anchoring or micro piling.

Water Well Drilling in Mixed Ground Conditions
JC712 is tailored for φ90–140 mm boreholes, making it a reliable solution for shallow to medium-depth water well drilling in both soft overburden and hard rock formations. Its 70 kW diesel engine and 2500 N·m rotary torque ensure steady penetration even in challenging strata.

Geothermal Heat Pump Boreholes
The dual-speed rotation and air compressor compatibility (10–18 m³/min at 0.7–1.8 MPa) allow efficient and clean drilling for geothermal loop installations. The dry-type 12-core dust collector improves environmental safety, especially in residential drilling operations.

Slope Stabilization and Soil Nailing
Thanks to its 3340 mm feed stroke and 35° climbing ability, JC712 excels in hilly or unstable terrain. It's suitable for soil nailing, slope protection, and anchor hole drilling in infrastructure reinforcement projects like highways, dams, and railways.

>> FAQ

Q1: What drilling applications is the JC712 best suited for?
A1: JC712 is designed for medium-depth drilling tasks including water well drilling, geothermal boreholes, foundation piling, and slope stabilization projects.

Q2: What is the maximum drilling depth and hole diameter supported?
A2: It supports up to 35 meters depth and hole diameters ranging from φ90 mm to φ140 mm, compatible with 3" or 4" DTH hammers.

Q3: Is the rig suitable for use in hilly or uneven terrain?
A3: Yes, with 35° climbing ability and 450 mm ground clearance, it performs well on rough terrain and uneven job sites.

Q4: What type of air compressor is needed for operation?
A4: JC712 requires an air compressor that provides 10–18 m³/min airflow at 0.7–1.8 MPa working pressure.

Q5: Does the rig include a dust collection system?
A5: Yes, it comes equipped with a 12-core dry-type dust collector to ensure cleaner operations and better environmental compliance.

Q6: How is the drilling rod handled during operation?
A6: It uses an oil cylinder feed system with a 3340 mm stroke and 900 mm extension, delivering smooth rod insertion and retrieval.

Q7: What is the power system configuration?
A7: The rig is powered by a 70 kW Yuchai YC4A100-T20 diesel engine with a 70 L fuel tank, delivering a balance between power and fuel efficiency.

Q8: Is a winch included with the rig?
A8: A winch is available as an optional feature and can be configured based on specific drilling needs.

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