I’ve stopped looking at motor quotes the way I used to.

After six years of managing procurement for a mid-sized industrial automation company—roughly $180,000 in motor and drive system spending across 200+ orders—I can tell you this with confidence: The lowest-priced maxon motor quote is rarely the cheapest option when you factor in the total cost of ownership.

That’s not a guess. That’s from tracking every invoice, every lead-time delay, every reorder due to an underspecified model. Period.

Let me show you what I mean.


Why I Started Tracking TCO Instead of Unit Price

It took me about 18 months and a half-dozen painful reorders to figure this out. Early on, I’d compare quotes for, say, a maxon DC motor—maybe a 40mm brushless model—and go with the vendor who was 12% cheaper. Felt good at the time.

But after tracking those orders in our procurement system, a pattern emerged. About 30% of my “budget wins” turned into cost overruns within three months. The cause? Almost always the same: hidden costs baked into the “cheap” quote."

I built a simple cost calculator after getting burned on hidden fees twice. Now every quote goes through it. The framework is straightforward:

Total Cost = Base Price + Setup/Engineering Fees + Shipping + Potential Rework + Downtime Risk

Most procurement people forget the last two. Those are the ones that bleed your budget dry.


The $4,200 Lesson That Changed My Approach

In Q2 2024, we needed a batch of servo motors for a new robotic arm assembly. Three vendors bid:

  • Vendor A (maxon distributor): $4,200 for the package, quoted with integrated controllers and a 6-week lead time.
  • Vendor B (online surplus): $3,450 for what looked like identical motors, 8-week lead time, no controller integration included.

My gut said Vendor B. The numbers said Vendor A. Something felt off about B’s responsiveness—slow to reply, vague on specs. I almost went with B. Glad I didn’t.

Before signing, I ran B’s quote through my TCO sheet. Here’s what it revealed:

  • Setup/engineering: $500 to integrate their motors with our controls (Vendor A included it).
  • Shipping: $180 (expedited, because 8 weeks was cutting it close).
  • Potential rework: $300 (based on 15% defect rate from surplus vendors in our history).
  • Downtime risk: $1,200 estimated (if the motors failed, the assembly line would pause).

Vendor B’s “cheap” quote total: $5,630.
Vendor A’s all-in price: $4,200.
That’s a 25% difference hidden in fine print.

We went with Vendor A. The motors arrived on time, integrated without issue, and we’ve had zero failures. Cost-wise, it wasn’t even close.


What a ‘Good’ TCO Looks Like for a maxon Motor

Based on my data, here’s a realistic breakdown for a standard brushed DC motor order (say, a maxon DC motor for a conveyor system):

  • Base price: 60-70% of total cost
  • Lead time / expedite fees: 5-10% (if you need it fast, you pay)
  • Engineering support / integration: 10-15% (hidden if you don’t ask)
  • Rework / returns: 5-10% (especially with low-spec or surplus vendors)
  • Downtime risk: 10-20% (hard to quantify, but real)

If the quote is cheap on base price but the supplier can’t answer spec questions or offers no integration support, the TCO will climb. That’s where the “Swiss-made” argument comes in—not as a luxury, but as a risk reduction factor. A maxon motor failure in a critical assembly line costs more than the motor itself. I’ve seen it happen.


When the ‘Cheapest’ Quote Actually Works

I’m not saying you should always go with the premium quote. There are exceptions.

If you’re prototyping or building a one-off test rig, a surplus motor might be fine. The rework risk is lower because you’re not putting production on hold. I’ve done it myself for lab projects. For production runs, though, don’t gamble.

Also, if the vendor has a solid track record and you’ve verified their quality with a small test order, the TCO gap narrows. But I’d still run the numbers.

My experience is based on mid-to-high-volume orders for industrial use. If you’re buying for a hobby project or a small robot, your risk profile is different. The TCO framework still applies—just adjust the risk numbers.


A Quick Way to Estimate TCO Yourself

I built a simple spreadsheet for this. Here’s a rough version:

  1. Base price—the quote, plain.
  2. Add 5% if lead time is > 6 weeks (you’ll likely need expedited shipping).
  3. Add 10% if engineering support isn’t included (you’ll pay for integration).
  4. Add 10% if the supplier isn’t authorized (higher risk of defects).
  5. Add 15% if it’s a critical application (downtime cost).

If the total is higher than a competitor’s base quote, that “cheap” option isn’t cheap. Simple.

Prices as of early 2025; verify current rates with suppliers.