The Ugly Truth of Blind Riveting

Anytime I see an operator reach for pliers, I already know we’re off track.

Not because they’re doing something wrong—but because by the time we get there, the problem’s obviously already been there for a while.

One of the first things I hear is, “This tool is a problem.”

And I get it. I really do. This part of the plant is frustrating. The line has to keep moving, parts have to go out, and when something isn’t working, you don’t have the luxury of sitting around theorizing.

You do what you can.

You work around it.

You fight through it.

You grab pliers.

And while all of that is happening, no one knows why. There are plenty of meetings. Lots of speculation. Occasionally, some unkind words of blame.

But no answers.

Talk to Me

When someone tells me it’s the tool, I don’t argue. I ask one question:

How many brands of blind rivet tools do you have in your plant?

Because that answer tells me a lot.

If you’ve got multiple brands—and they’ve all had issues on the same application—it’s probably not the tool. And if you don’t know how many brands you have, that tells me something too. It usually means the problem was handed to you, and we need to go talk to the people closest to it.

I don’t start by asking more questions after that. I start by watching.

How the tool is being used. Whether the rivet is being pre-loaded into the substrate. Whether the operator is fighting the process instead of working with it.

And then I start looking for one thing: the spent mandrels.

Because that’s where the truth is.

Most people throw them away. I collect them.

Because they tell a story—if you know how to read them.

Multiple jaw marks usually mean the jaws are catching late—wrong nosepiece? low stroke? A stretched mandrel that didn’t break but instead pulled like taffy—the metal heating up and leaving that tell-tale “J” shape. Breaking high points toward an application issue. Breaking low? Now you start questioning the rivet itself.

That little piece of metal most people toss in the trash is evidence. It’s the one thing in the entire process that tells you what happened—with no assumptions, opinions, or guesses.

You're Paying for This. More Than You Know.

Here’s where things usually go sideways.

Most people believe the tool is the smart one in the relationship. It’s not.

The tool pulls. The rivet decides.

The rivet determines when it breaks, how it behaves, and what the outcome is. The tool just delivers force. But in this industry, we’ve flipped that. We treat the rivet like it’s untouchable and the tool like it’s the problem.

And there’s a reason.

I’ve never seen an overconfident engineer when it comes to blind riveting. What I’ve seen instead is hesitation.

Because when you say, “we need to look at the rivet,” what people hear is, “we have to change the part.” And that feels big.

Locked specs.

OEM control.

Escalation.

So instead, we stay where it feels safer.

“Let’s just try a new tool.”

And this is where the real damage happens.

Good tools get rejected. Suppliers get blamed. Distributors get stuck in the middle. Maintenance gets burned out trying to compensate for something they didn’t create. Everyone is frustrated.

Yet, the line keeps running—but it’s running wrong.

And you know it.

Maintenance, What’s Your 20?

Maintenance gets blamed a lot in these situations—and to be fair, sometimes it is a maintenance issue. Wrong or unknown hydraulic fluid. Low prime. Water in the system. Mixed internal parts across brands.

But most of the time, they didn’t create the problem.

They inherited it.

And I don’t think a lot of people realize, but I’ll tell you: the rivet is not untouchable. The tool is overtrusted. And maintenance is expected to win a fight they don’t even know they’re in.

And when all else fails, we buy something new—and expect maintenance to fix it.

But here’s the rub: it rarely solves the problem.

Start Here

If there’s one thing I’d tell you to do before you blame the tool, it’s this:

Dry fire a rivet. Then look at what it leaves behind.

Just start there.

Because here’s the ugly truth:

Most people don’t understand blind riveting as well as they think they do. And the one thing that tells the whole story—the spent mandrel—gets thrown away without a second look.

I’ve walked into plants where people are frustrated, getting blamed, trying to keep things moving while nothing is actually getting better.

And I’ve also seen what happens when it finally clicks.

When people understand the why—why the rivet goes in the tool first, why grip matters, why the tool behaves the way it does—they don’t just fix one problem.

They stop repeating it.

When I walk out of a plant, I don’t want people thinking, “we fixed the tool.”

I want them thinking, “I finally understand why this works… and why it wasn’t before.”

Because once that happens, everything gets...quieter.

If you read this and thought, “I wish I could talk to her for 10 minutes”—

Good.

Start by dry firing a rivet.

Until next time... M