DTH90-E is the pneumatic-electric member of Huada's quarry drilling range. Rotation is electric and feed is pneumatic, while compressed air still drives the down-the-hole hammer and clears the hole.
DTH90-E working range
Why the mixed power arrangement matters
This model requires both electricity and compressed air at the drill. It is therefore a better fit for sites that can provide a stable electrical connection near the working face and an air supply within the listed pressure and flow range. Compressor selection should be checked at the actual hose length and elevation, not only at the compressor outlet.
Positioning and drilling direction
The source lists several fastening points for relocating the machine in confined areas. A double-hinge or universal ball connection allows vertical, horizontal or inclined drilling, and the slide/propulsion design is intended to support feed and hole straightness. Available hammer and bit sizes must still be matched to the rock and Ø65–90 mm hole requirement.
Before mobilising the drill
- Mark hole diameter, direction, depth and collar positions
- Confirm electric supply plus 7–9 m³/min compressed air at working pressure
- Check rod, hammer and bit compatibility
- Plan fastening, relocation and drill-rod handling
- Record penetration rate and straightness during the first representative hole
Original product images
