Quarrying and mine drilling projects in the North American market keep growing. More and more contractors are looking for cost-effective and reliable DTH drilling equipment. The down the hole drilling machine delivered by YG Machinery to a Canadian customer has been put into smooth operation for quarry blasting work. This unit balances mobility and drilling efficiency. It supports multi-angle drilling from 0 to 90 degrees and works well for open-pit mines, quarries, earth and rock blasting, and other projects. An optional dust collector is available to meet strict on-site environmental rules in North America.
The customer is a local professional drilling and blasting contractor in Canada. They took on rock stripping and blasting work at an open quarry, which required a large number of blast holes. The quarry project had a tight schedule, with clear requirements for continuous operation, consistent hole quality, and on-site dust control for drilling equipment. The customer planned to purchase one DTH drilling rig suited to local rock conditions to keep the blasting drilling process on track.
Customer Requirements & Geological Conditions
Rock layers on site are mixed. Most areas feature medium-hard rock or harder formations with high abrasion and uneven rock surfaces. Key customer requirements:
Maintain stable drilling speed in hard rock;
Blast hole drilling angle adjustable from 0 to 90°;
Crawler undercarriage to travel easily over rough quarry ground;
Equipped with a dust collection system to comply with Canadian environmental construction codes;
Maximum hole diameter up to 127 mm, economical working depth of 21 m.
Considering the medium-hard and harder rock conditions at this Canadian quarry, our technical team recommended the YG420 down the hole drill rig for the customer. This model is fitted with a 4-inch DTH hammer, delivering sufficient rotation torque. It drills holes from Φ90–127 mm with an economical depth of 21 m. Its strong feed force and steady rotation reliably support high-volume blast hole drilling in hard rock, fully matching the customer’s construction parameters.
Field Performance & Project Results
After delivery, installation, commissioning, and operator training, the YG420 DTH drilling equipment officially started work at the quarry.
Fast relocation: The crawler down the hole drilling machine moves easily between hole positions, greatly cutting downtime for repositioning;
High drilling efficiency: Stable penetration in medium-hard rock. 0–90° adjustable drilling angles support flexible blast hole layouts;
Dust control: Optional dust collector meets Canadian worksite environmental standards;
Consistent hole quality: Reliably produces Φ90–127 mm blast holes with an economical working depth of 21 m.
The customer’s site supervisor commented that this YG DTH drilling rig cuts idle downtime and raises daily drilling footage, with predictable blasting outcomes. The machine can run long continuous shifts. Its simple structure makes routine inspection and maintenance easy for field technicians.
Three key reasons led the customer to select YG420 for this Canadian project: First, accurate model matching. The site has medium-hard rock plus quartz veins that demand high rotation torque. The YG420 is purpose-built for such conditions. Instead of suggesting the YG412 just to lower the quotation, we proposed the right solution based on actual geology. The YG420’s 2,200 N·m torque and 3,670 mm feed travel leave extra capacity for hard rock drilling. This built trust during technical discussions.
Second, balanced hard rock performance and mobility. The quarry has scattered working zones requiring frequent moves, without sacrificing hard rock drilling capacity. At 4,620 kg compact weight and 2.5 km/h travel speed, YG420 outperforms the customer’s old equipment for relocation. Its 4-inch hammer and 26 m/s maximum feed speed deliver solid drilling speed in medium-hard and harder rock. This balance directly answers the customer’s core need: strong hard rock penetration plus fast movement.
Third, balanced cost and support. In Canada, long lead times and high prices for spare parts of European and American DTH drilling equipment create heavy pressure for small and mid-sized contractors. Our “spare parts package + remote support” solution lowers total ownership cost while leveraging the customer’s own repair capability. It avoids costly waiting downtime for original manufacturer service. For this down the hole drill rig, the customer does not need complicated service contracts. They need a machine that drills steadily in hard rock and gets problems fixed quickly.
Get Your Down the Hole Drilling Machine Solution
Beyond quarry blast drilling, YG DTH drilling equipment is also used for metallurgical mines, earthwork, railway, hydropower, and underwater rock blasting. If you have plans for open-pit drilling projects, send us your project details, and our engineers will prepare a professional solution for you.
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