Automated longhole drilling.
One-hole automation is standard, with fan automation and teleremote drilling available by package.
ProductSandvik · Underground Mining
Sandvik DL422i Underground Longhole Drill Rig
A fully automated top-hammer longhole drill for underground mass mining in production drifts from approximately 4 × 3.5 m. DL422i supports vertical, inclined, single and parallel holes up to 54 m with intelligent drilling control and optional fan automation or teleremote operation.
Product imagery3 views
The main white-background image is a standardized visual based on the official machine appearance; application images are from Sandvik product materials.
01Hole diameter76–127 mm
02Hole lengthUp to 54 m
03Drilling power90 kW
04Boom coverage4 m
Technical dataView all specificationsProduct parameters
Technical specifications.
Values shown are reference data. Final equipment configuration and regional compliance are confirmed in the technical agreement.
| Parameter | Specification |
|---|---|
| Technical specifications | |
| Brand | Sandvik |
| Model | DL422i |
| Drilling method | Top-hammer longhole |
| Hole diameter | 76–127 mm |
| Maximum hole length | 54 m |
| Boom coverage | 4 m |
| Rod length | 1.22–1.83 m |
| Drilling power | HPP1590, 90 kW |
| Tramming engine | QSB4.5, 127 kW Tier 3 |
| Operating weight | Approx. 32,000 kg, depending on options |
| Dimensions | 10,960 × 2,480 × 3,100 mm |
Configuration note: Rock drill, automation package, rod system, emissions version and operating weight vary with the selected equipment package.
Product details
Designed around real drilling conditions.
A fully automated top-hammer longhole drill for underground mass mining in production drifts from approximately 4 × 3.5 m. DL422i supports vertical, inclined, single and parallel holes up to 54 m with intelligent drilling control and optional fan automation or teleremote operation.
Accurate positioning.
The instrumented ZR35 telescopic boom supports stable positioning and hole accuracy.
Connected production.
Drill plans, process data and digital workflows can be integrated through the available automation packages.
Jobsite fit
Configured around your rock, hole plan and climate.
Send us the target diameter, depth, rock hardness, altitude and local emission requirements. We will recommend the drill string, hammer and regional machine configuration before quoting.
Discuss your application →01Underground mass mining02Production longholes03Fan drilling04Remote drilling
Heavy Rig support
From configuration to productive drilling.
Application review
We verify ground conditions, hole plan and production targets.
Factory configuration
Drill tools, options, documents and delivery scope are locked before production.
Parts & service planning
Recommended startup spares and consumables help protect your first operating season.
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Need a rig matched to your rock, depth and site conditions?
Send your target hole diameter, depth, rock type and timeline. Heavy Rig will help narrow the configuration.