Instructions
The YONDA YDH803A combines hydraulic rotation and percussion, delivering up to 25,000 Nm of rotation torque for anchoring, water well and Ø178 mm casing drilling applications. Three rotation speeds selectable through hydraulic circuit switching, together with three percussion frequency options, allow operating settings to be selected according to drilling requirements.
Key Features
• High rotation torque: Maximum torque of 25,000 Nm.
• Three rotation speeds: Selectable through hydraulic circuit switching.
• Three percussion frequency options: Selectable to suit operating requirements.
• Casing drilling capability: Suitable for Ø178 mm casing drilling.
Parameter
Product Video
FAQ
1. What applications is the YDH803A suitable for?
The YDH803A is suitable for anchoring, water well and casing drilling applications requiring hydraulic rotation and percussion. Suitability depends on ground conditions, borehole diameter, drilling depth and tooling.
2. How does the YDH803A differ from a rotary-only drilling head?
The YDH803A provides both rotation and percussion, while a rotary-only head does not generate percussion within the head itself. Selection depends on the drilling method and whether the tooling requires percussion from the head.
3. Does Ø178 mm refer to the casing size or the maximum borehole diameter?
It refers to the applicable casing size, rather than a universal maximum borehole diameter. Please specify the casing outside diameter, drill bit diameter and target depth for configuration review.
4. Can the YDH803A replace an existing drilling head?
Replacement can be evaluated against the existing rig specifications. Mounting interface, available space, load capacity, hydraulic pressure and flow, and tooling connections must be checked. Torque alone does not determine compatibility.
