I'm a maintenance planner at a packaging plant. For six years, I've been the person ordering Tsubaki Chain products for our site—roller chain, chain breakers, bearings, and actuators—and I've kept a failure log the whole time. Fourteen mistakes. About $18,000 in wasted budget when you add reordering, rush shipping, downtime, and a bruised ego or two.
That log is the reason our team has a checklist now. And it's the reason I'm writing this: so you don't repeat the parts of my job I'd rather forget.
The biggest thing the log taught me? There is no universal answer. What you should buy depends on whether you're fixing a broken line at 3:30 p.m., building a new machine with tight space, or simply trying to replace a part you haven't actually identified yet. I've made expensive mistakes in all three situations. Here's what happened and what I'd do differently.
The tsubaki chain breaker mistake that cost more than the chain
In September 2022, a conveyor on line 2 lost a section of #60 chain at about 3:30 in the afternoon. We had a replacement roll on a pallet. What we didn't have was a chain breaker in the right size. The one in our toolbox was for #40/#41 chain. I know this now. Back then, I thought a breaker is a breaker.
“Just use the punch,” I said. “It's basically the same.”
It was not basically the same. The punch slid off the hardened pin, gouged the side plate, and bent a link. The chain section went in the scrap bin. The line stayed down until a local technician brought out a properly sized breaker the next morning.
That one mistake cost roughly $1,100: the service call, the overtime, and the rush delivery of the right tool. The chain itself was around $320. The lesson wasn't about chain quality. It was about using the right tool for the chain number.
What I now know about Tsubaki chain breaker sizing
Chain breakers are matched to chain size for a reason. A #60 chain has a wider pin than a #40 or #41 chain. If the punch and die don't match the pin diameter, you're damaging the chain—and maybe the tool.
If your plant runs more than one chain size, get a breaker with interchangeable die sets or keep a dedicated breaker for each size. I'm not going to claim that only the Tsubaki brand works; a well-made breaker from any reputable manufacturer can do the job. What I will say is that “universal” doesn't mean “one die fits every chain.”
And please, hear me on this: a Tsubaki zip chain is not spare roller chain.
The phrase “tsubaki zip chain” makes it sound like something you cut with a chain breaker. Tsubaki's Zip Chain actuators work differently: they use interlocking chain that zips together to form a rigid lifting column. That chain is part of an engineered actuator system. If it's damaged, you replace parts according to the manufacturer's documentation or call technical support. You don't improvise with a chain breaker.
If a line is down right now: check the chain number stamped on the side plate, confirm the breaker size, and ask your supplier for a delivery time they can commit to. If a rush fee buys you certainty, pay it. I once paid $400 extra for overnight delivery of the right part; the alternative was another day of downtime. The extra cost was a rounding error compared to the loss.
Even after I paid that fee, I kept second-guessing. What if the replacement was wrong too? I didn't relax until the die clicked into place the next morning.
Choosing between a tiny linear actuator and a 24v linear actuator
In March 2024, our R&D group asked me to source a tiny linear actuator for a 10-lb inspection flap. The request said “smallest one you can find.” I found a compact unit, ordered it, and it stalled on day two.
Why did it stall? Because I hadn't checked duty cycle, mounting geometry, or the actual force required at the point of application. “Small” was the only spec I had. The actuator was rated for the load—barely. No margin. No airflow.
That $170 actuator turned into two $170 actuators plus a week of “is it fixed yet?” emails.
There's no one-size-fits-all recommendation here, so let me split it by situation.
Situation A: You're replacing an existing actuator
Match these before ordering: voltage, stroke, retracted length, mounting ends, and speed. A 24v linear actuator is common in industrial control systems, but if the original ran on 12V or AC with a built-in controller, you're not just swapping the actuator—you may be swapping a power supply or control logic too. I once ordered a replacement because the brand and stroke were right. I skipped voltage and watched the correct part sit on a shelf for a month.
Situation B: You're designing something new with limited space
Define the motion first: load, speed, stroke, duty cycle, mounting, environment. Then filter for size. If your panel already has a 24V DC bus, a slightly larger 24v linear actuator is often the better system choice than a slightly smaller actuator with an odd voltage. The goal is a machine that runs, not a parts bin where everything is technically a linear actuator.
If you're exploring compact lifting options, a Tsubaki Zip Chain actuator is worth a look because its chain retracts into a small housing while supporting a load when extended. But I won't recommend it here as a blanket fix. That would be exactly the mistake I'm describing—choosing a technology before defining the need. Let an applications engineer size it for your load and duty cycle.
Situation C: You're not sure you need an electric actuator at all
Describe the motion in plain words. Is it pushing, pulling, lifting, holding, or pressing? Is the force continuous? Does the load need to stay put if power is lost? Once you can answer those, the actuator type starts to choose itself.
The surprise wasn't that the tiny actuator stalled. The surprise was how much hidden detail sits behind a two-word request like “tiny actuator.” From my perspective, that phrase is a red flag—it means someone hasn't finished the engineering yet.
(Note to self: our checklist now requires a simple sketch of the mounting before any motion component gets ordered. This lesson cost me $340 and a piece of my reputation.)
What's a ball bearing? A question that ended up costing $128
A few months ago, a new procurement coordinator asked me, “What's a ball bearing?” My first answer was useless: “It's what you need to fix the conveyor motor.”
The question is fair if you've never had to identify one. A ball bearing has steel balls between an inner and outer ring so two rotating parts can move with less friction. But for maintenance and purchasing, “ball bearing” is only a category. It doesn't tell anyone which bearing.
Our coordinator sent a purchase request for a “ball bearing” for a failed motor. We didn't want to pull the motor apart until the replacement was on hand, so we ordered from the motor's nameplate. Two days later, when the damaged bearing was finally out, the exact marking was printed on its outer ring. We'd ordered the right bore—but the wrong shield/seal type.
The correct bearing cost $14. The expedite fee to get it the next morning was $114. Total extra: $128. I still wince at that invoice.
What I should have told the coordinator from the start:
- Read the marking on the old bearing before ordering. It's usually printed right on the ring. A number like 6204-2RS gives the series, bore size, and seal type. “Ball bearing” gives a supplier nothing.
- If you're in procurement, ask for a photo and a part number. It's not about distrusting your colleagues; it's about not guessing. That one habit has caught 47 potential errors in the past 18 months on our team.
- If you're an engineer, remember that bearings with the same bore can still be different in load rating and sealing. A 6204 and a 6304 both fit a 20 mm shaft, but they're not automatically interchangeable.
I'm not trying to turn you into a bearing design engineer. I'm saying that reading the number is a five-minute step that can save you a two-day delay. “What's a ball bearing?” is a beginner question. I answered it with a shrug and paid the price for a sloppy answer.
How to know which situation you're really in
If you're still unsure which advice applies to you, here's a quick self-check:
- Is a line down right now? You don't need a lecture on comparison shopping. Confirm the part marking, call a supplier, and ask for a guaranteed delivery time. Pay for certainty if it's available. The total cost isn't the part price—it's the downtime, the overtime, and the second delivery if the first one is wrong.
- Are you designing or retrofitting a machine? Write down the requirements before choosing anything: voltage, stroke, speed, load, duty cycle, and mounting constraints. If 24V DC fits your controls, choose a 24v linear actuator over a smaller unit with an unusual voltage. If you need a compact lifting actuator, investigate products like the Tsubaki Zip Chain actuator—but let someone qualified do the final sizing.
- Are you replacing a part you haven't identified? Stop. Read the marking. Take a photo. Look it up in the catalog or configurator. A chain number and a bearing number make the difference between a ten-minute fix and a three-day delay.
The most expensive mistakes in my log share the same root cause: I treated “probably” as a delivery date. Probably fits. Probably works. Probably arrives on time. That's how I burned about $18,000 over six years.
Certainty is a feature, and it's worth paying for. Sometimes it's a rush fee. Sometimes it's buying the correct tool instead of forcing the wrong one. Whatever form it takes, it costs less than the alternative. I can say that with confidence—not because I read it in a textbook, but because I paid the tuition.
Check the number. Check the sizing. Check the delivery promise. Then order.