If you’ve ever stood on an escalator, barely noticing the step that shifts smoothly under your feet or the hinge that keeps each step aligned with the next, you’re not alone. Most of us don’t think twice about the parts that make this daily commute work—until one small component fails and brings the whole ride to a halt. As someone who’s spent the last decade as an escalator parts supplier, I can tell you the step chain is one of the most unsung heroes of the entire system. It’s what carries every step around the truss, balances the weight of dozens of passengers, and keeps the whole escalator moving in perfect sync. But not all step chains are the same. In my years in this business, I’ve seen every type under the sun, each built for a specific job, each with its own quirks. Today, I want to break down the different types of escalator step chains, so the next time you hear about one, you’ll know exactly what it does and why it matters. Escalator Parts
First, let’s start with the basics. Step chains are not like bike chains or car timing chains—they’re designed for heavy, sustained loads, often in high-traffic areas like shopping malls, airports, or subway stations. A standard escalator has two step chains, one on each side, connected by the steps themselves. Every link has to be strong enough to support hundreds of pounds of people, durable enough to run 12+ hours a day, and precise enough to keep steps from wobbling or slipping. Getting the right chain for your escalator isn’t just about replacement parts—it’s about safety and uptime. That’s why I never cut corners on matching the right chain type to the application.
The most common type you’ll find on standard indoor escalators is the double pitch step chain. I’ve sold more of these than any other, and for good reason. Double pitch chains get their name from their pitch—the distance between the centers of two adjacent pins, which is 2 inches (or 50.8 mm) for this type. That 2-inch pitch is the industry standard for most mid-sized escalators used in retail spaces and office buildings. What makes double pitch chains so popular is their balance of strength and flexibility. The double pitch design means each link is a bit longer than standard, so they can handle longer runs without needing extra support. They’re also easy to service—most repair technicians keep double pitch pins and rollers in their toolkits because they’re universal across so many brands.
A few months back, I got a call from a maintenance manager at a regional mall that was installing three new escalators for their newly expanded wing. They were initially considering a more heavy-duty chain, but after explaining their foot traffic was around 8,000 people a day—nothing extreme for a mall—I recommended double pitch. It’s cheaper upfront, easier to replace in a pinch, and holds up perfectly for that kind of regular use. The catch with double pitch? They’re not for heavy loads. If you put a double pitch chain on an escalator that’s meant for 10,000+ people an hour, you’ll end up with stretched links and broken rollers within a year. That’s the mistake people make all the time: assuming a chain is a chain, and not accounting for traffic volume.
Next up is the helical rivet step chain, which is the workhorse for high-traffic locations like airports and subway stations. Helical rivets aren’t the straight, solid pins you see in double pitch chains—they’re twisted (helical) steel pins that lock the links together from the inside out. This design is built to handle way more stress than standard chains. Airports, for example, have escalators that run 18 hours a day, 7 days a week, moving thousands of passengers with rolling suitcases. Those suitcases bump into steps, putting extra lateral force on the chain, and helical rivets don’t budge under that pressure. The rivet’s twist creates a stronger grip than a straight pin, so there’s no risk of the link shifting or the pin falling out, even after years of heavy use.
I worked with a major international airport a couple of years ago to replace all their step chains on 12 escalators. The old chains were straight rivet types, and they were failing every 18 months because of the constant impact from luggage. We switched to helical rivet chains, and so far, three years later, they haven’t had a single major chain failure. The downside? Helical rivet chains are more expensive, and they require specialized tools to install or repair. You can’t just swap a pin and go—you need a press to compress the helical rivet back into place, which means most small repair teams don’t carry that equipment. That’s why I always tell clients in high-traffic areas: it’s worth the upfront cost of helical rivet chains, because you’ll spend less on emergency repairs and downtime in the long run.
Then there’s the mono-rail step chain, a type you don’t hear about as much, but one that’s critical for specialized escalators. Mono-rail chains are designed for escalators with a single track, usually in compact spaces like narrow subway tunnels, small office elevators that convert to escalators, or portable escalators for events. The biggest difference here is that mono-rail chains run along a single central rail, instead of two side-by-side rails like standard chains. That makes them lighter, more flexible for tight turns, and perfect for installations where space is at a premium.
Last year, a event planning company reached out to me looking for replacement parts for a portable outdoor escalator they use for concert venues and trade shows. The old chain they were using was a standard double pitch, but it kept slipping off the track because the portable escalator had a narrower frame than permanent installations. We supplied mono-rail step chains, and it solved the problem immediately. The mono-rail design lets the chain adapt to the smaller track without compromising strength. The only downside is that mono-rail chains are application-specific—they don’t work on standard permanent escalators, so you have to get the exact size and pitch that matches the unique escalator. That’s why I always ask for the model number or measurements of the escalator when someone comes to me asking for mono-rail chains—one size doesn’t fit all here.
Another type I deal with regularly is the corrosion-resistant step chain, made for outdoor or high-moisture environments. Standard steel chains will rust if exposed to rain, snow, or the humidity of a pool or parking garage, which is a big safety risk. Rusted links can break, causing steps to drop or the entire escalator to jam. Corrosion-resistant chains are made from materials like stainless steel, or have a special coating (like zinc plating or black oxide) that prevents rust from forming.
A few years back, I got a call from a hotel that had an outdoor escalator leading from their parking garage to the lobby. The area gets heavy rain and salt air in the winter from road treatments, and their standard chains were rusting through in less than two years. We replaced them with zinc-plated corrosion-resistant step chains, and they’ve been running smoothly for four years now. Stainless steel chains are even more durable, but they’re more expensive, so I usually recommend zinc plating for most outdoor applications and stainless steel for places like swimming pools or coastal areas where salt exposure is constant. The key with corrosion-resistant chains is that they require regular cleaning—salt and dirt can still build up, so you have to wipe them down every few months to keep the coating working.
I also want to mention high-temperature step chains, a niche type but one that’s essential for specific industries. Escalators in places like foundries, industrial plants, or bakeries have to operate in environments with extreme heat, sometimes up to 200 degrees Fahrenheit. Standard steel chains will stretch and weaken in that kind of heat, leading to failure. High-temperature chains are made with heat-treated steel alloys that can withstand high temperatures without losing their strength.
Last year, I worked with a large bakery that had an escalator moving flour and dough between floors. The area around the escalator was kept warm for product storage, and the standard chains were stretching so much they had to be adjusted every two weeks. We supplied high-temperature step chains, and they haven’t had to adjust the chain in over a year. These chains are less common, but if you’re working in an industrial setting, you can’t cut corners here—standard chains just won’t hold up.
Now, after walking through all these types, I want to circle back to what I’ve learned in 10 years as an escalator parts supplier: there’s no one “best” step chain—only the right one for the job. Too often, people try to save a few bucks on a cheap chain, only to end up paying for costly downtime and repairs later. I’ve seen malls shut down entire wings for a day because a cheap chain broke, costing them thousands in lost revenue. Airports have had to reroute thousands of passengers because of a failed chain, which is a logistical nightmare.
That’s why I take the time to talk to every client, ask questions about their escalator, their foot traffic, their environment, and their maintenance schedule before recommending a chain. I don’t just sell parts—I help them make smart decisions that keep their escalators running safely and reliably. If you’re a maintenance manager, a property owner, or someone who works with escalators on a regular basis, you know how important uptime is. Don’t let a bad chain ruin your day.
Elevator Car Components If you’re in need of replacement step chains, or you’re upgrading your current system and want to make sure you get the right type, reach out to our team to discuss your needs. We carry all the types I mentioned, plus custom chains for specialized applications, and our team has the expertise to help you pick exactly what works for your escalator. Don’t wait until a chain fails—get the right parts now to avoid downtime later.
- "Escalator Component Specifications and Safety Standards." American Society of Mechanical Engineers, 2021.
- "Step Chain Design and Application Guidelines." Elevator and Escalator Manufacturers Association, 2022.
- "Corrosion Resistance in Heavy-Duty Industrial Chains." Journal of Mechanical Engineering Materials, 2020.
- "High-Temperature Material Performance for Power Transmission Chains." International Journal of Industrial Engineering, 2021.
Huzhou Kenai Elevator Technology Co., Ltd.
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