Steinert Magnetic Separators: What the Spec Sheet Doesn't Tell You

When I took over purchasing in 2020, I thought a magnetic separator was a magnetic separator. A year later, I was explaining to our finance director why we needed to replace the belt on a sorter that was supposed to be “turnkey.” That was a fun budget meeting.

I'm an office administrator for a 40-person metal recycling and recovery company. I manage roughly $2 million in annual purchasing across 12 vendors, and I report to both operations and finance. So I see the same thing from both sides: equipment that has to work, and equipment that has to be worth the money.

Searching for “Steinert” should be straightforward. It isn't. Type it into Google and you'll get the German magnetic separation company, a few people named Kelly Steinert and Carmen Steinert, and sometimes a detour to a streaming page for The Continental: From the World of John Wick, which is a different kind of sorting. If you landed here looking for where to watch that series, this isn't that article. But if you're comparing a Steinert WSG or a Henry sorter, here's what I wish someone had told me before the purchase order went out.

The surface problem: Which Steinert model is right?

Every equipment search starts the same way. You pull up specs, compare models, and try to match capacities to your tonnage. For us, that meant staring at a WSG data sheet and a set of Henry stats side by side. I circled the “up to” numbers, checked the power requirements, and thought we were done. We were not.

The surface problem looks like a selection problem: Which Steinert model—WSG for eddy current separation, Henry for non-ferrous recovery, KSS for magnetic separation, PLASMAX for X-ray sorting—best fits your flow? The official product pages give you dimensions and capacity ranges, and those are useful. But they are only the starting point. The spec sheet says “throughput up to X tons per hour” and “purity up to Y percent.” To be fair, those values are real under defined conditions. The question is whether your material matches those conditions.

The deeper problem: Specs describe perfect material. You don't process perfect material.

This is the part I didn't understand at first. The feed you test in a brochure, or even in a short demo, is not the feed you get on a Tuesday afternoon in February.

The same WSG eddy current separator that recovers non-ferrous metals from clean shredder granules will behave differently on a load with high fines, wet cardboard, and tangled copper wire. The machine doesn't change. Your feed changed. And the spec sheet didn't tell you that, because it couldn't.

There is also the upstream dependency. A magnetic separator or sensor sorter is only as good as the material preparation before it. If your pre-screening and ferrous removal are inconsistent, every downstream sort gets harder. We learned this after a string of “off-spec” loads turned out to be our own fault. The separator was doing its job. It was just being asked to do it on feed it was never designed to handle.

On top of that, we had a data gap. I don't have hard data on how much non-ferrous metal we were actually sending into our old system three years ago—we simply weren't tracking it. What I can say anecdotally is that when we finally tested incoming loads, our “10% metal” estimate was closer to 4% or 5%. Basically, we were comparing equipment against an assumption that was wrong by half. That changed the whole conversation.

If you ask me, the deeper problem is not “which Steinert model is the best.” It's “what do you actually know about your material, and what will your material look like when the machine is installed?” Any “up to” figure is a red flag if it isn't attached to test conditions. The answer to that question is where the real buying decision lives.

The real cost of ignoring this

I had a communication failure with a supplier once. I said “equivalent performance to the demo.” They heard “same feed as the demo.” Result: a machine that took three weeks to tune before it reached anything close to the projected recovery rate. In the meantime, the operations manager was bringing me reports with numbers that made no sense.

That report had a cost. Lost metal is just lost revenue. Contaminated product gets docked at the buyer's scale. Downtime and re-sorting hit both operations and finance. If you market your recovered product as “recyclable” or “clean,” you also need evidence for those claims—per the FTC Green Guides (ftc.gov), environmental claims have to be substantiated, not just hoped for. I'm not saying the equipment failed. I'm saying the buy decision was based on a vague version of the truth.

I get why people buy on specs alone—budgets are real. But the hidden costs add up. There is a risk weighing that happens on every big purchase. The upside of picking a lower-capacity Steinert model was a lower purchase price. The risk was a bottleneck when our volume climbed in the summer. I kept asking myself: Is the savings worth potentially missing a production window? For us, the answer was no. But I only got there after watching the first estimate fall apart.

We didn't have a formal acceptance test process at that point. The third time we ordered a sorter without a clear feed specification, I created a checklist that forced us to define incoming material before signing anything. I should have done it after the first time. The checklist doesn't guarantee perfection, but it catches the vague promises that get everyone into trouble.

What actually solves it

First, test your material. The Steinert Practice Center exists for this reason. Send them your actual feed—not a representative photo from the website—and ask for a report that includes recovery rate, purity, and a description of residue. If you need a ballpark number for budgeting, this is the number to use.

Second, write down the commercial boundary. Specify particle size, moisture, contaminants, and throughput assumptions. If the vendor says a Steinert Henry sorter can hit a certain recovery percentage, ask “on what feed?” and get it in writing. Same for the WSG.

Third, ask about service and spare parts before you need them. In my experience, lead times change fast. This was accurate as of Q4 2024—the market changes fast, so verify current lead times before you budget. But the question is worth asking regardless: what happens when the belt wears out or a sensor needs replacing? A great separator is just a paperweight if you can't get parts.

Finally, get a reference that processes something close to your material. A company shredding cars is not the same as a company sorting crushed electronics. Both may use Steinert equipment, and neither will mirror your operation. Find someone who at least starts with the same feed type. Ask them what they would do differently. That conversation is worth more than a dozen spec sheets.

Automated sorting is clearly the direction the industry is heading. But automation only creates efficiency if it is set up for the material it actually has to handle. Efficiency is not a feature on the spec sheet. It's the result of the right match between machine, feed, and process.

Bottom line

Steinert equipment is capable. “Capable” and “right for your material” are two different things. In my opinion, the biggest mistake isn't choosing the wrong model. It's choosing without testing your material, defining your feed, and understanding the costs that show up after installation.

So before you sign, ask one question: “What happens when my material isn't what we assumed?” If the answer is “we'll adjust the settings,” that's a good sign. If the answer is “that's covered by the spec sheet,” get the test report to back it up.

And if you came here to figure out where to watch The Continental: From the World of John Wick, I'm sorry. This article won't help with that. But if you're buying a separator, at least now you know what to test.