Demag Cranes: 8 Questions You Should Ask Before Buying (From Someone Who Made the Mistakes)

Demag Cranes: What I Wish Someone Had Told Me

I've been handling Demag crane orders for about 7 years now. Started in 2017, fresh-eyed, thinking "a crane is a crane."

Three major mistakes later—each one costing somewhere between $2,000 and $12,000 to fix—I keep a checklist on my wall. Not proud of it. But I'd rather you learn from my facepalms than your own.

Here are the questions people actually ask me, plus a few they should have.

1. What exactly does the model number on a Demag crane tell me?

More than you think, less than you'd hope.

A typical Demag model code like DH 10-16 breaks down like this:

• DH = the series ("Demag Hoist")
• 10 = lifting capacity in tonnes
• 16 = lifting speed class or motor frame size

But—and this is where I messed up my first year—not all units follow the same naming convention. Older pre-Konecranes models? Different logic. Post-2019 Tadano-era parts? Also different.

"I decoded a model wrong in 2018. Ordered a 5-ton hoist drum for a 10-ton unit. Return shipping was brutal."

Lesson: If you're buying used or sourcing parts, always cross-check the serial number against Demag's legacy documentation. The model code alone isn't enough.

2. Should I buy a new or used Demag overhead crane?

Depends on your risk tolerance. And your timeline.

New cranes from Demag—now typically supplied through Konecranes or Tadano channels—come with full warranties and load-testing certifications. Lead times? In 2024, we saw quotes ranging from 14 to 28 weeks for a custom overhead crane.

Used Demag cranes can be tempting. They're built like tanks. But here's the catch: older models (pre-2010) often use discontinued electrical components. I've seen buyers pay $8,000 for a "bargain" used crane, then spend another $15,000 retrofitting the control panel.

My rule of thumb:

• Need it certified for heavy production (>>8 hours/day)? Go new.
• Light-duty backup crane or yard use? Used can work—but budget for potential modernization.

3. Are Demag spare parts interchangeable with Konecranes or R&M parts?

Short answer: sometimes. Long answer: don't bet on it.

After Konecranes acquired portions of Demag's industrial crane business, some component designs were merged. The Demag DK chain hoist, for example, shares certain parts with newer Konecranes models.

But I learned this the hard way in 2021: I ordered a "compatible" motor brake for a Demag DR hoist from a third-party supplier. Claimed fit. Didn't fit. Lost a week of production.

"The vendor said it was cross-compatible. I should have checked the mounting flange dimensions myself. Cost: $600 and a 3-day delay."

Advice: Original Demag parts are still widely available through authorized distributors. For critical components—brakes, motors, load chains—don't risk it. For non-critical wear items (paint, seals), alternatives are more forgiving.

4. What capacity Demag crane do I actually need?

Not the same as your max load weight.

I've seen maintenance teams spec a 5-ton overhead crane for a 4.5-ton load. Sounds logical. But you have to factor in:

• Hoist weight: Your trolley and hook block weigh something. Add 200-500 kg.
• Dynamic loading: Sudden stops, swinging loads, and acceleration add force.
• Future expansion: Are you planning heavier molds or equipment in 3 years?

Industry standard: spec for 125% of your heaviest planned load. That's what I do now.

Excess capacity isn't cheap. A 20-ton Demag bridge crane costs roughly 30-40% more than a 10-ton unit. But upgrading later? That's a structural modification. Way more expensive.

5. How do I know if a "Demag crane for sale" is the real deal?

This is the question nobody asks until it's too late.

I almost bought a "Demag crane" in 2019 from a broker. Looked right. Plate looked right. Turns out it was a rebadged Chinese unit with a Demag-style plate riveted on.

Here's how to verify:

• Check the serial number with the Demag legacy parts database (accessible through authorized dealers).
• Look for dual naming: After Konecranes/Tadano transitions, many cranes show both brands. Total fakes usually don't.
• Ask for load test certification from a recognized inspection body (e.g., TÜV, SGS, or local equivalents).

Real Demag cranes have robust build quality—thick steel, precise welds, vibration tags from the factory. A fake feels lighter, sounds hollow. Not scientific, but after 7 years, I can tell.

6. What should I ask when getting a quote for a Demag overhead crane?

Three things I learned to include—because they cost me extra once:

1. Is installation included? A crane isn't plug-and-play. Rail mounting, power supply, load testing, commissioning. That's 10-20% of total project cost.
2. What's excluded in the price? Shipping? Taxes? Runway beams? Control panel wiring? I've seen base quotes that exclude everything except the crane block.
3. Lead time guarantee? In 2023-2024, lead times fluctuated. Some suppliers quote "12 weeks" without penalty for delays. Others commit in writing. Guess which one delivers.

"I once accepted a quote that excluded crane runway installation. $4,200 surprise. Check. Everything."

7. Is it worth buying Demag replacement motors and hoists separately?

Yes—if you know what you're matching.

Demag electric motors (especially the older Z series and newer MF series) are well-known in the industry. They're reliable, and spare parts are available. But I've made two mistakes here:

Mistake 1: Buying a motor with different mounting flange dimensions. Even 5 mm off means custom adapters. Delay, cost, headache.

Mistake 2: Assuming the motor's duty cycle rating matches your use. A standard S3 duty motor isn't designed for continuous high-intensity lifting. I watched a $3,000 motor overheat in 6 months because of this.

What works: Sticking to the original specs when replacing within the same crane. If you're upgrading—like adding a faster hoist speed—get a proper engineering review.

8. Demag, Konecranes, or Tadano—who should I buy from today?

This is the elephant in the room. The brand lineage is a bit tangled:

• Demag's industrial crane division (overhead cranes, hoists) → absorbed into Konecranes years ago.
• Demag's mobile crane division (crawler & mobile cranes) → acquired by Tadano in 2019.

So if you see "Demag" on an overhead crane today, it's probably a Konecranes-built product carrying the legacy name. If it's a mobile crawler crane, it's Tadano.

For buyers: Both are reputable. Konecranes has a broader service network for overhead cranes. Tadano focuses on mobile. I don't favor either—I just check what's best for my specific application. And I always ask: "What's the actual after-sales support in my region?"

That question has saved me more than any brand loyalty ever did.