Sandvik Underground Drill Rigs: 3 Scenarios for Choosing the Right Fit (A Procurement Perspective)

There’s no single “best” Sandvik drill rig

Here’s the thing: if you Google “best underground drill rig” you’ll get a lot of articles that try to pick a winner. But in my experience—processing about 60-80 equipment orders annually across a handful of vendors—the answer depends entirely on your situation.

I’m not a mining engineer, so I can’t speak to rock hardness or blast patterns. What I can tell you, from a procurement and operations standpoint, is how to match a Sandvik rig to your specific operational reality.

Three common scenarios I’ve seen

Basically, the choice comes down to three questions:

• Are you building a new production line from scratch?
• Are you replacing aging equipment in an existing fleet?
• Are you trying to standardize across multiple sites?

The right answer for one is often the wrong answer for another. Let’s break it down.

Scenario A: Greenfield site, new operations

If you’re setting up a new mine or a new production area, you have a rare opportunity—no legacy equipment to worry about. Here, I’d look at Sandvik’s DD series (like the DD422i) or the DL series. These are their newer, more integrated platforms.

Why? Because you can set up a unified fleet from day one. In 2024, I helped consolidate orders for a client starting a new decline. We went with the DL420i—it was roughly $X per unit (don’t hold me to the exact figure—pricing changes quarterly). The big win was unified parts inventory and operator training. One spare parts kit fits all. That cut our onboarding time from what used to be 3 months down to about 6 weeks.

Honestly, the upfront cost is higher than mixing brands. But the total cost of ownership—maintenance, downtime, parts availability—is lower. If you’ve ever had a rig sit idle for a week waiting on a non-standard part, you know that feeling.

Scenario B: Replacing an old rig in a mixed fleet

This is the most common situation I deal with. You have a 10-year-old rig that’s becoming a downtime headache. Or it failed a safety audit. Or the manufacturer stopped supporting it. (Should mention: I once had a vendor who couldn’t provide a proper invoice—turns out their legacy parts support was equally bad. That cost us about $2,400 in rejected expenses before we switched.)

In this scenario, you don’t need the latest and greatest. You need something that integrates well with your existing equipment. Here, Sandvik’s DS series (like the DS211 or DS311) is often a good fit. They’re proven, reliable, and you can usually find used or refurb units if your capital budget is tight.

I’ll be honest: the “new is always better” thinking comes from an era when digital options were limited. Today, many well-maintained used Sandvik rigs outperform new ones from lesser brands. But—and this is a big “but”—make sure your service team can support it. I once went with a cheaper used rig and it turned out the specific model required a diagnostic tool our team didn’t have. That was a $4,000 mistake I won’t make again.

Scenario C: Multi-site standardization

If you’re managing operations across two or more sites, the equation shifts again. Now, efficiency gain isn’t just about the rig itself—it’s about the network.

In this case, Sandvik’s newer i-Series (like the DL432i or the battery-electric LH518B) makes a lot of sense—if the power infrastructure is there. The LH518B is genuinely impressive for ventilation cost savings—it eliminates diesel fumes in underground environments. But switching to battery-electric needs charging infrastructure. That’s another capital project.

We looked at this in 2022 for a client with 3 Australian sites. The battery-electric rigs offered about 40% reduction in ventilation costs—industry-standard figures, not mine. But the charging setup added about 8% to project costs upfront. In that case, the payback was about 18 months. If you’re planning a 5-year production cycle, that’s a no-brainer. If you’re on a 12-month project, maybe not.

People think electric is always cheaper today. Actually, the upfront cost is still higher. The savings come over time. The causation runs the other way—lower operating costs make the higher acquisition cost acceptable, not the other way around.

How to figure out which scenario you’re in

Here’s a quick self-check I do when evaluating a purchase:

• Do you have existing Sandvik rigs? If yes, you probably want to stay with the same series for parts commonality.
• Is this a short-term (less than 3 years) project? Then new tech like battery-electric probably won’t pay back. Stick with diesel.
• Is your electric infrastructure ready? If not, add that cost into your comparison—it’s often forgotten.
• How consistent is your operator training? Standardizing on one rig type across sites can save you months in onboarding.

To be fair, sometimes you just need a machine that works. The DD422i is a workhorse for a reason—it’s not fancy, but it runs. If you’re in Scenario B, that might be all you need.

Take it from someone who’s had to explain a bad equipment choice to a VP: the right rig for your operation is better than the “best” rig on paper. Match the machine to your reality, not the marketing.