Why Your Flexco Lacing Keeps Failing (It's Not the Lacing)

A house divided against itself cannot stand.

Abraham Lincoln said that. He wasn't talking about conveyor belts, but he might as well have been. A splice is the one place where a belt is divided, and if you're ordering lacing the way we used to, that divided house is going to fall down on your shift.

I'm a purchasing coordinator for a 120-person material handling operation. I don't design conveyor systems or turn wrenches. I manage about $300,000 a year in MRO supply orders. When I first started this job, I assumed stronger lacing meant better lacing. It took a year of failures—and a pile of invoices—to unlearn that.

The Problem That Started It

In early 2024, our maintenance lead requested a bigger size of Flexco lacing. The current lacing was pulling out at the splice every couple of weeks. He was sure the fix was a stronger fastener. I approved the order. What else was I going to do?

The heavier lacing didn't last longer. If anything, it failed faster.

Even after choosing the bigger lacing, I kept second-guessing the decision. What if the splice wasn't the issue? What if I was ordering the wrong thing? I didn't relax until we installed it. And then it broke.

Here's the thing: when a splice keeps failing, the lacing is usually the symptom, not the disease.

What's Really Going On Under That Lacing

Let me rephrase that. The lacing itself can be perfectly fine. It might be great lacing. But if it's the wrong lacing for your belt and your pulleys, it's going to fail.

I do not mean you should ignore the selection chart. Charts help. But they don't tell the whole story. According to Flexco's published selection guide, the starting points are belt thickness, pulley diameter, and operating tension. Those three numbers matter more than a marketing phrase like 'heavy duty.'

Pulley Diameter Is a Bigger Deal Than Most People Think

Heavier lacing means a stiffer hinge. A stiff hinge on a small pulley gets flexed to its limit every single revolution. That's the paperclip effect: bend it enough times, and it cracks. If you're running a critical transfer point with a small tail pulley, a 'stronger' fastener can be the worst thing you can install. We learned this the hard way on a belt that had a 16-inch tail pulley. The heavier Flexco lacing we'd chosen had no chance.

The Belt Behind the Splice May Be Done

Before you blame the lacing, look at the belt. If the carcass has started to separate, if the plies are stretched, or if there's a worn spot near the old splice, new lacing has nothing to grab. I've seen belts with so many old holes around the splice area it looked like a used punch card. You can't anchor a new splice to swiss cheese.

Installation Mistakes Happen When the Pressure Is On

I'm not going to list every installation detail here. But I will say this: alignment matters, skiving matters, and tightening torque matters. If one side of the splice is loaded more than the other because of misalignment, the fastener will work loose. That's not a Flexco problem. That's a 'we were in a hurry and didn't follow the procedure' problem.

The Cost of Not Digging Deeper

Our failed splice was more than a nuisance. It shut the line down three times in one month. That's overtime, wasted labor, and approximately $38,000 in lost production and replacement material. And the frustrating part is that we kept ordering the same answer.

There was one more hidden factor: dust. The transfer point was dusty enough that fines accumulated inside and around the splice area. That packed-in dust accelerated wear and made the fastener look like it was being torn out when it was really being attacked from outside. It wasn't until we installed a Flexco Minimist dust suppression system that the splice area stayed clean enough to actually diagnose the problem.

Did the Minimist system fix the splice? No. But it removed the variable that was hiding the real issue.

What I'd Do Differently

Looking back, I should have called Flexco's technical team before placing the first order. At the time, it felt like questioning our maintenance lead's judgment. But a 15-minute conversation would have saved us six weeks of failures.

What they asked wasn't complicated. They wanted belt thickness, pulley diameter, splice angle, tension rating, and whether the belt had been spliced before. We didn't have those answers. That was the real problem.

This isn't like the Hercules vs Dassault 900 debate people have on aviation forums. 'Which is better?' depends on whether you need cargo capacity, range, or a boarding staircase. Same with belt lacing. There is no 'best' lacing in the abstract. There is only lacing that fits your belt and your operating conditions.

Flexco lacing has been around for more than a century for a reason. But if you buy it the way we first did—by guessing at a heavier part number—you'll get exactly the results we got.

The Honest Truth About Limitations

Real talk: mechanical lacing is not always the right answer. If you're running a food-grade line that requires a continuous, smooth belt surface, a vulcanized splice might be required. If there are regulatory restrictions or extreme tension loads, the design may call for an endless splice. I'm not going to tell you Flexco lacing is the solution to every conveyor problem. That would be a lie.

But for the majority of above-ground material handling applications, a properly selected, properly installed mechanical splice is reliable, inspectable, and replaceable in a fraction of the time of a vulcanized joint. That's why we standardized on Flexco lacing after getting the specification right.

If I could give you one piece of advice: stop asking for 'stronger lacing.' Start asking for 'the right lacing.' Measure your belt, know your pulley diameters, and talk to someone who knows what to do with that information. Then order with confidence.

I can't promise you'll never have a splice fail. Anyone who does is lying. But I can tell you the difference between ordering a part and solving a problem. It starts with asking the right question before you hit 'confirm.'