A Down The Hole Drilling Machine helped an Australian quarry solve slow, unstable borehole drilling in fractured granite. This case study covers the client’s daily struggles and the measurable output after installation. You will see the machine parameters, the site conditions, and the factors behind a DTH Boring Machine Price quote.
YGS Series Parameters and Drilling Hole Diameter
The table below lists specifications for the YGS series used in this Australian project. These parameters cover total weight, walking speed, tank capacity, and drilling hole diameter across five model options.
| Model | YGS100A | YGS153 | YGS180 | YGS300 | YGS350 |
| Total weight | 5.95T | 3.8T | 6.3T | 6.8T | 8T |
| Walking speed | 2.5km/h | 2.5km/h | 2.5km/h | 2.2/3.8km/h | 4km/h 2km/h |
| Diesel tank capacity | 85L | 70L | 85L | 85L | 225L |
| Shipping size | 6500*2100*2400mm | 4640*1980*2260mm | 6600*2110*2500mm | 6600*2220*2600mm | 7600*2350*2800mm |
| Drilling hole diameter | 90-146mm | 83-130mm | 90-146mm | 90-152mm | 90-165mm |
| Power configuration | YCD4R22T-80 | YC2108 33kw/2400rpm | YCD4R22T-80 55kw | YC4DK80-T302 | YC4DK100-T304 73.5kw/2200rpm |
| Highest horizontal hole height | 3.2m | 2.8m | 3.6m | 3.25m | 3.5m |
Project Background
Our client operates a hard-rock quarry in Western Australia. The site supplies crushed granite aggregate for regional road and construction projects. Dense, fractured granite with quartz veining wears down conventional rotary bits quickly.
Before contacting YG Machinery, the client ran an older DTH drilling rig. That rig struggled with hole deviation and frequent bit changes. Production needed 90-150mm diameter blast holes at consistent depth, plus predictable fuel and maintenance costs.
Their schedule required roughly 3,000 meters of drilling monthly to keep the crusher feed steady. Rig downtime meant a direct hit to output targets. After reviewing three suppliers, the client chose YG Machinery’s YGS180 model.
Hole diameter range and walking speed on rough terrain drove the decision. A large diesel tank capacity also mattered, since it reduces refueling interruptions during long shifts.
Drilling Challenges Before Upgrading the Down-The-Hole Drilling Rig
The client’s previous setup created three recurring problems. These issues slowed production and raised costs across the site.
Hole Deviation in Fractured Rock
Quartz veins and rock fractures pushed the old drill string off-line. Deviated holes meant uneven blast patterns and wasted explosive charges. Operators had to redrill sections, adding hours to every shift.
Frequent Bit and Hammer Wear
The previous machine lacked adequate power for hard granite. Bits wore out roughly every 800 meters, below the expected service life. Local suppliers often ran out of replacement parts, so crews waited days for shipments.
Limited Mobility on Uneven Terrain
The quarry floor has slopes and loose rock debris. Slow walking speed on the old rig could not match relocation needs between blast zones. Setup time between holes stretched the daily schedule.
Together, these issues cost roughly 25% of planned drilling capacity each month. Management needed a Down The Hole Drilling Machine built for steady performance in abrasive, fractured ground.
YG Machinery DTH Drilling Machine Solution
YG Machinery recommended the YGS180, paired with a drilling plan matched to site geology and production targets.
Matching Power to Rock Hardness
The YGS180 runs on a YCD4R22T-80 power configuration. This setup delivers steady torque through fractured granite without stalling. Reduced side-loading means blast holes stay straighter across the full depth.
Extended Hole Diameter Range
A 90-146mm drilling hole diameter range covered every blast hole size the quarry needed. One machine handled the full range, cutting changeover time between production zones.
Terrain-Ready Mobility
At 2.5km/h walking speed, the YGS180 moved between blast sites faster than the previous rig. An 85L diesel tank supported full shifts with fewer refueling stops.
Our team also trained the client’s operators on maintenance routines for abrasive rock. This training extended component life and reduced unplanned downtime.
Measurable Results After Installation
The client tracked performance for four months after installation. Results confirmed the Down The Hole Drilling Machine met and exceeded production targets.
Drilling time per hole dropped by 40%. Reduced hole deviation and fewer redrills drove most of that gain. Bit service life extended from 800 meters to roughly 1,400 meters in the same rock.
Monthly drilling output rose from 2,250 meters to over 3,100 meters, past the original 3,000-meter target. Downtime for equipment relocation fell by nearly a third, thanks to faster walking speed across the site.
Fuel use per meter drilled also dropped. Fewer redrills and faster relocation meant less idle running time. The site manager noted improved crusher feed consistency within the second month.
Client Feedback
“The hole straightness changed how we plan our blasts,” said the quarry’s operations manager. “We used to budget extra time for redrilling almost every shift. That buffer is mostly gone now, and our crusher feed schedule runs closer to plan.”
The client also praised YG Machinery’s remote support team. Quick responses during the first weeks helped the crew adjust to the new rig without losing production days.
FAQ About Down The Hole Drilling Machine
A Down The Hole Drilling Machine handles hard, abrasive rock such as granite, basalt, and quartz-bearing formations well. The pneumatic hammer strikes rock directly at the bit face. This design manages fractured or dense ground more efficiently than standard rotary drilling. It suits quarrying, mining, and water well projects in hard-rock regions.
Drilling depth depends on the model and mast setup. A single pass typically ranges from 20 to over 50 meters. Multipass setups extend total depth further. Site geology, hole diameter, and compressor capacity all shape the practical depth range for a project.
Price depends mainly on hole diameter range, power configuration, and shipping requirements. Buyers should also weigh spare parts availability and after-sales support against the quote. A lower upfront price sometimes brings higher long-term costs when maintenance support falls short.
The hammer’s position directly behind the bit keeps impact energy close to the rock face. This limits the string flex that causes deviation. Matching power configuration to rock hardness, as in this Australian project, further reduces side-loading. Correct bit selection also helps maintain straight holes.
Yes, many DTH Drilling Machine models cover a diameter range rather than one fixed size. The YGS180 in this case drills 90-146mm holes without swapping rigs. This flexibility lowers equipment costs for sites with varied blast hole needs.
DTH Boring Machine Price – YG Factory Direct
YG Machinery manufactures the full YGS Down The Hole Drilling Machine lineup. Models range from the compact YGS100A to the heavy-duty YGS350. Factory-direct pricing skips distributor markups. Buyers get transparent costs tied to model specifications, not negotiated margins.
Share your target hole diameter, rock type, and monthly production goals for a tailored quote. Our team matches project requirements to the right YGS model and configuration.
YG Machinery also supplies a Small Water Well Drilling Rig line and Hydraulic Core Drilling Rig equipment. Our range covers Horizontal Directional Drilling Equipment and a Rotary Piling Machine. Core Drilling Rig Machine models and RC Drill Rig options round out the lineup. Contact our team today for a factory quote suited to your site.
