Interroll Group Company Overview: An Integrator's 8-Point Pre-Order Checklist

If you’ve typed “Interroll group company overview” into a search engine, you probably don’t want a corporate brochure. You want to know what this company makes, and what to check before you put it on a purchase order. I can help with the second part — I’ve made most of the mistakes already.

I’m an application engineer at a systems integration firm. I’ve been specifying conveyor components and handling the technical side of component orders for about eight years. That’s roughly 400 orders, give or take — I’d have to open the CRM to get the real number. A handful of those orders went wrong in memorable ways. This checklist is what survived.

The rule I repeat to every new hire: five minutes of verification beats five days of correction. Most of our ordering problems were never product failures. They were configuration failures. And configuration failures are the preventable kind.

The Interroll group company overview that matters before you buy

It’s tempting to simplify: “Interroll? They make drum motors.” It’s not wrong, but it’s incomplete — and that simplification causes more order mistakes than you’d expect.

Interroll Group is a Swiss-headquartered, publicly traded company in the internal logistics space. Its corporate pages describe a product portfolio built around conveyor rollers, drum motors, motorized RollerDrive systems, control electronics such as the EC310 platform, plus equipment platforms for sorting and pallet/cart handling. You’ll also see “tambour moteur Interroll” on French-language datasheets — same drum motor family, same need for precise ordering.

For an integrator, the more important point is how the company operates. Interroll generally isn’t building one-off components for a custom line. The product logic is standardized and modular. That’s useful: a conveyor design can be replicated in different plants and countries, with engineering and manufacturing support in Europe, the Americas, and Asia-Pacific (per Interroll’s public company information). The flip side? The modular platform has variants. Many variants. And when the wrong variant arrives, that’s not Interroll’s fault. It’s the fault of the person who filled out the order — sometimes me.

Eight checks before I press send

These run in the order I use them. Some are boring. A couple are steps I skipped when I was starting out, and I still have the invoices to prove it.

1. Confirm voltage, phase, and frequency before you confirm the price

Obvious, you say? You’d be surprised.

A drum motor built for 230 V/400 V, 50 Hz is standard in Europe. It is not correct for a 460 V, 60 Hz plant in the United States. I’ve seen more than one specification copied from a previous project without checking the site supply. The motor looks right in the BOM, the drawing looks right, and the error doesn’t surface until someone tries to commission the line.

On your PO, write the voltage, phase, and frequency exactly as the site has them — not as the electrical drawings say, but what is actually at the terminals. And if the machine is going to another country, say that out loud in the first meeting. It changes more ordering decisions than you’d think.

2. Make belt speed and drum speed agree on paper

A drum motor has a rotational speed. The conveyor belt has a linear speed. They’re related, but they’re not interchangeable, and they can be expressed in m/s, m/min, or ft/min. Mix up m/min and ft/min and you’re off by a factor of three before the supplier even looks at your RFQ. Type 50 mm instead of 0.05 m and you’re off by a factor of 1,000.

So I include both on the RFQ: requested belt speed and the drum RPM that should follow from the specified drum diameter. If one is wrong, the mismatch shows up while the order is still on my desk. That’s where I want it to show up.

3. Send the duty cycle, not just motor power

When we started out, we sent specs like “0.37 kW, 500 mm belt, 25 m/min” and considered it done. That’s not enough.

Drum motors are enclosed. They’re cooled through the drum shell and the surrounding belt and structure, so the duty profile matters. A line that starts and stops thirty times per hour is not the same sizing case as a line that runs continuously for 24 hours. Product weight, incline, belt type, and operating hours all change the drive selection.

Give the supplier the application profile, not just the output number. A good rep who asks about starts per hour is not making conversation. And a quote that arrives without anyone asking those questions? That’s a red flag.

4. Check the cable outlet side against the mechanical layout

This is the mistake I’m least proud of, and the reason this checklist exists.

In September 2022, I processed an order for 24 drum motors on a parcel induction line. I checked power, voltage, speed, and mounting dimension. What I didn’t check was the cable outlet side.

The cable on a drum motor exits at one end, and there are left-hand and right-hand configurations for a reason. Our drawing had the drives mirrored on the second half of the line. We ordered 24 identical units. Twelve had the cable outlet on the wrong side.

We had to reorder 12 units in the correct configuration and wait for them. Total cost was around $3,200 extra plus about a week of project delay. The equipment was not at fault. My specification was.

Now, every time I order anything with a cable orientation option, I compare the order line against the physical layout — not against the previous PO.

5. Specify the shell surface for the actual incline and belt

My first expensive buying mistake happened in 2018. I ordered 14 drum motors for a line that had a 6-degree incline. I did not specify the shell surface or lagging; I left the default and moved on.

The motors were fine. They just couldn’t grip the loaded belt reliably on the incline. All 14 had to go back. Freight and re-lead time cost us somewhere around $4,200 — maybe $4,500, I don’t remember the exact figure and I won’t pretend I do. I do remember that the configurator had a lagging field, and I left it as the default.

Check the incline, the belt type, and whether the application needs rubber lagging or another traction surface. If you don’t know those details, stop the PO until you find out.

6. Match the control variant to the drive

When the BOM includes motorized rollers or drum motors with controls, matching the drive is only half the job. You have to match the control variant too. The EC310 control platform, for example, comes in several variants — different voltage ranges, communication options, operating modes. Similar-looking controllers are not always the same controller.

A colleague recently copied a BOM from a European project into an order destined for Asia. He updated the motor voltage. He didn’t update the controller variant. The mismatch was caught during pre-shipment inspection, and we dodged a bullet — one invoice line away from a very bad day.

When the quotation arrives, check the control part number against the project spec. Don’t assume the electronics are interchangeable.

7. Measure the shaft ends on the actual frame. Do not assume.

Because Interroll’s platforms are standardized, it’s easy to think: “A 50 mm drum will fit any frame that used a 50 mm drum.” Actually, “standard” means standard within the platform. It doesn’t guarantee the interface with an existing frame from another manufacturer or a custom weldment.

On retrofit orders, pick up a set of callipers and measure the opening in the frame, the required shaft-end diameter, and the shaft-end length. Compare those numbers with the supplier’s dimension sheet for the exact model you’re ordering. Do it even when the old and new units look the same size. If your frame is older than the product generation, don’t trust the previous part number — trust the measurement.

8. Know where the spares and support actually live

A global manufacturer’s footprint only helps if someone in the country where the line runs can answer the phone.

I’ve gone back and forth between a less expensive local option and a globally supported platform. On paper, the local option looked fine — for the first site. But when the customer was replicating the same line across multiple countries, the standardized platform won. One BOM, one support structure, one spare parts strategy. I understand not every project justifies that approach, but it should be a deliberate decision, not an accident.

Before you release the order, ask which service or distribution point covers the installation site, how long typical spare part deliveries take, and whether critical parts are stocked. Get the answer in writing. Future you — or the maintenance manager standing next to a stopped conveyor — will be grateful.

Notes I keep adding to this checklist

Looking back at the expensive mistakes, they share one root: assumption. The order looked fine on my screen. It was not fine on the line.

Two last reminders. First, “standard” is not a substitute for checking. Second, if someone tells you a component will never fail, don’t build your spares strategy on that sentence — regardless of how good the brand is. Good equipment fails less, not never. The cheapest insurance you can buy is the five minutes of verification between a specification and a purchase order.

For a complete Interroll group company overview — financial results, current footprint, exact product categories — the company’s official website and annual report are better sources than my memory. But for ordering a drum motor correctly the second time, the checklist above is the part you actually need.