OEM vs Aftermarket: What I Learned Buying Parts for Epiroc Drills and Breakers

OEM vs Aftermarket: What I Learned Buying Parts for Epiroc Drills and Breakers

If you've ever managed parts procurement for a fleet of Epiroc surface drill rigs or hydraulic breakers, you've faced the question: OEM or aftermarket? It's basically a cost-versus-risk tradeoff, and there's no one-size-fits-all answer.

I'm an office administrator for a 150-person mining services company. I manage about $800k in annual MRO spending across 12 vendors. When I took over purchasing in 2020, I quickly learned that the cheapest part isn't always the cheapest—and that who inspects the equipment matters just as much as what's bolted on.

Here's what I've found after five years of buying Epiroc hammer parts, breaker bars, and service for everything from Denali trucks to underground jumbos.

The Comparison Framework

Let's put two approaches side by side:

• Approach A: Buy genuine Epiroc parts and use Epiroc-certified technicians for scheduled inspections
• Approach B: Buy aftermarket parts (sometimes called “will-fit”) and use in-house or third-party mechanics for inspections

I'm going to compare them across four dimensions: unit cost, total cost of ownership, compliance & warranty, and inspection reliability. Fair warning: the conclusion won't be “always go OEM.” That's too simple—and I've made that mistake.

Cost Per Part: The Obvious Winner

Aftermarket parts are cheaper. That's not controversial. A breaker bar for a hydraulic hammer might list at $400 from Epiroc and $220 from a reputable aftermarket supplier. On paper, you save 45%.

But here's the thing: I've had aftermarket parts fail prematurely more than once. One time, a cheap Epiroc hammer seal kit leaked within 40 hours of operation. The machine had to be pulled off a development heading—oops—costing us about $3,200 in downtime and labor. The original “savings” of $180 disappeared fast.

Honest limitation: Not all aftermarket parts are created equal. Some are indistinguishable from OEM. But without a reliable supplier vetting process, you're gambling. My advice: if you're buying a critical wear part (like a breaker bar or piston), stick with OEM until you've tested a specific aftermarket brand on a non-critical machine.

Total Cost of Ownership: Where Experience Bites You

It's tempting to think “cost per part” is the whole picture. But the real metric is cost per operating hour.

I ran a comparison last year on epiroc surface drill rigs—specifically the feed beam wear strips. OEM strips cost $1,100 per set; aftermarket was $640. Over 2,000 drill meters, the OEM set lasted 25% longer. That alone killed the price advantage. Plus, the OEM set came with a technician-friendly installation guide that saved our mechanics an hour of trial-and-error (approx. $85/hour labor).

So the math: OEM $1,100 ÷ 2,500 hours = $0.44/hr; aftermarket $640 ÷ 2,000 hours = $0.32/hr. Aftermarket still wins on paper, but only by 27%. Add in installation time and the margin shrinks to ~$0.04/hr. That's not nothing, but it's close enough that other factors (like warranty) tip the scale.

I should add: that calculation assumed no premature failures. If you hit a bad batch, the numbers reverse hard.

Compliance & Warranty: The Hidden Trap

Many Epiroc warranty policies state that use of non-approved parts can void coverage. If a new Epiroc hammer fails because of an aftermarket bushing, you might be on the hook for thousands in repair costs. That's not speculation—I had a colleague in a sister company who lost a $15,000 warranty claim over a $70 aftermarket filter.

And then there's the regulatory side. For who should inspect a crane?—or a drill rig, or any lifting/breaking equipment—many mining jurisdictions (like MSHA in the U.S.) require periodic inspections by a qualified person. “Qualified” often means factory-trained or certified by an accredited body. Using aftermarket parts doesn't automatically disqualify an inspector, but it can raise questions during audits if the parts don't match the manufacturer's specifications.

Reference: According to MSHA 30 CFR Part 56.15005, “All machinery and equipment shall be maintained in safe operating condition.” That includes using parts that meet original design requirements. (Source: MSHA Code of Federal Regulations, current as of 2025.)

If you're in a highly regulated environment, OEM parts may be the path of least resistance for compliance. It's not that aftermarket can't pass—it's that it adds an extra layer of documentation burden.

Inspection Responsibility: Who Should Really Look?

This ties back to the keyword “who should inspect a crane?”—or a breaker, or a drill rig. My view, from a procurement perspective: don't let cost-cutting bleed into safety inspection.

I'm not a mechanical engineer, so I can't tell you the specific bolt torque spec for a breaker bar. But I can tell you that when we tried to save money by having our own operators do daily visual inspections (instead of a certified third-party), we almost missed a hairline crack in a boom arm. That could have been a catastrophic failure.

Now we use a hybrid approach: operators do pre-shift walk-arounds, but every 500 hours we bring in an Epiroc-certified technician for a full inspection. The cost is about $1,200 per visit—but it covers both the hammer and the carrier (like a Denali truck). Insurance companies and site safety officers seem to like that model.

Honest limitation: If your equipment is older and out of warranty, you might get away with a competent local mechanic. But for anything newer than five years, I'd stick with OEM-trained inspectors.

So, When Should You Choose Which?

Here's my framework—no absolutes, just scenarios:

• Use OEM parts when:
  • Equipment is under warranty (don't void it)
  • Part is safety-critical (breaker bar, piston, accumulator)
  • You lack a trusted aftermarket supplier track record
  • Regulatory compliance heavily references OEM specs
• Aftermarket may be fine when:
  • Equipment is out of warranty (or you're self-insured)
  • Part is non-critical (shrouds, bolt-on guards, filters that you change often)
  • You've tested the specific aftermarket brand on a spare machine
  • Your in-house mechanics are comfortable with fit variations

And for inspections: who should inspect a crane?—or a drill rig, or a breaker—the answer is someone who is properly trained for that specific model. If Epiroc offers a certified inspection program, it's usually the best bet. But if that's too expensive, at least use a third-party inspector with documented credentials and liability insurance.

Bottom Line

There's no single right answer. I've gone through phases where I was 100% OEM and phases where I mixed in aftermarket. The key is knowing why you're choosing one over the other—and being honest with yourself about the risks.

Take it from someone who ate a $3,200 downtime cost to save $180: the cheapest path isn't always the cheapest path. Do your homework, test before committing, and never let cost pressure push you into an unsafe inspection shortcut.

Pricing as of April 2025; always verify current rates.