Pneumatic rock drills can be used to create controlled holes in oversize quarry rock when the quarry's approved secondary-breaking method calls for drilling. The tool purchase does not define the blasting method. Licensed and competent quarry personnel must control hole location, diameter, depth, explosives, exclusion zones and firing procedures under local law.
The procurement job is narrower and practical: match the drill, support arrangement, H22 steel, bit, air and flushing package to the approved hole requirement and the real access around the boulder or rock mass.
Start with the approved breaking method
Secondary rock reduction may use drilling and blasting, hydraulic breakers, mechanical splitting or other methods. Confirm that drilled holes are part of the quarry's approved plan before requesting equipment. Then give the supplier only the information needed to configure the drilling system.
| Site input | Why it changes the package |
|---|---|
| Rock type and fracture condition | Affects bit wear and drilling response |
| Approved hole diameter/depth | Defines steel and bit selection |
| Boulder position and access | Controls drill orientation and handling |
| Surface stability and work area | Determines whether the equipment can be positioned under site rules |
| Air source and hose route | Determines pressure loss and simultaneous capacity |
| Water/dust-control method | Defines flushing connections and operating limits |
| Moves per shift | Affects hose handling, portability and package quantity |
Select handheld or supported drilling
A handheld rock drill offers mobility for shorter holes and changing positions. An air-leg or other supported arrangement may suit different orientations and feed needs. The correct choice depends on the offered product, approved work posture and site controls; do not use an air leg or improvised support in an orientation the manufacturer does not permit.
Record the expected drilling direction and the space available for the drill body, steel changes and hose management. A package that works on a clear bench may not work safely beside an irregular oversize boulder.
Match H22 steel and bits as one system
For tapered systems, define shank dimensions, H22 steel length, taper angle, bit type and nominal diameter. The bit must fit the approved hole requirement and rock conditions, while the steel length must be practical for positioning and extraction.
Plan how worn bits will be identified and segregated. An undersize or damaged bit can change the hole and increase drilling difficulty. Do not mix tapers or shanks because parts appear to fit.
Verify compressed air at the drill
Quarry work often involves long hose routes and mobile compressor positioning. Use the manufacturer's required inlet pressure and air consumption, then account for hose internal diameter, length, couplings, leaks, elevation where material and simultaneous air users. Check dynamic pressure during operation rather than relying only on compressor nameplate pressure.
Include line lubrication, isolation, hose restraints and routing in the package. Hoses should not cross uncontrolled vehicle routes or create an unplanned trip and whip hazard.
Package the work for repeated moves
A practical field package may include the drill, approved support, line oiler, hose and couplings, water connection, starter/follow-on steels, bits, basic tools, wear parts and transport protection. Define a field box or controlled inventory so components are not lost or mixed when the crew moves.
| Before drilling | Ready when | Hold when |
|---|---|---|
| Work plan | Approved secondary-breaking method and location are released | Crew is asking equipment vendor to define blast design |
| Tool | Exact drill and support arrangement are known | Generic “rock drill” requested without orientation |
| Drill string | Shank, steel, taper and bit are matched | Mixed components or unidentified wear state |
| Air/water | Face pressure, hose and flushing are controlled | Only compressor model is known |
| Work area | Quarry isolation and access controls are in force | Equipment would be placed in an unstable or uncontrolled area |
RFQ fields
Provide the quarry application, approved hole range, rock description, drilling orientation, boulder/access conditions, number of drills operating, compressor and face-pressure data, hose route, flushing/dust method, existing H22 interfaces, package quantity, destination and required spare/packing documents.
Use the Rock Drills collection to review the commercial family and submit site inputs through Request a Quote. Product suitability and availability require final confirmation.
FAQ
Does this guide specify a secondary blast pattern?
No. The quarry's licensed and competent personnel must design and authorize the blasting work.
Can one long hose be used for any quarry location?
No. Hose diameter, length, couplings and simultaneous demand determine pressure loss. Verify pressure at the tool.
Should the longest H22 steel be selected?
Not automatically. Match steel length to the approved hole and the available positioning and handling space.