Rotocast #22 | Reduce downtime and breakdowns in rotomolding — Maintenance (Pt.2) — LIVE

What you gain by watching

• Discover how to transform maintenance from reactive to preventive and eliminate the downtime that steals hours and days of production from your factory.
• Learn how to create an equipment history and an occurrence log to map critical points and avoid rework, with real cases of failures that halted entire lines.
• Understand how to choose the right part, lubricant, and grease for each application, and see how a simple 'lazy' person on the team can be your best investment against invisible waste.

Episode chapters

1. 1

   Maintenance is not a cost: the number one mistake that hides waste on the factory floor

   In this episode, we follow the Invisible Waste series beyond the powder that falls on the scale: now the target is the hours and even days of production stopped due to a lack of maintenance guidelines. We show that it is not possible to calculate exact losses because of the variables, but we reveal the most critical starting point — the absence of equipment history — and argue that maintenance is not about swapping parts, but rather planning that prevents the losses that directors who see the department as an unnecessary cost end up learning the hard way.

   Maintenance is not swapping parts, you know? It is, there is all this planning. Sometimes people think maintenance is an unnecessary cost.

   ▶ Watch at approximately 4:19
2. 2

   Occurrence logbook: the record that keeps maintenance from firefighting blindly

   The conversation exposes a classic factory-floor bottleneck: when maintenance is not on the plant 24 hours a day and an abnormality happens outside the shift, information travels by word of mouth until it gets distorted and turns into a bigger problem. We then talk about the practical solution that changes the game — the occurrence logbook, this simple record, often neglected, that works as the living memory of production and feeds the history to map the critical points on the ABC curve.

   Anything abnormal that happens in production, whether mechanical or on the production side, if you track it daily, you can also do a full mapping and put it on the ABC curve of the most critical points

   ▶ Watch at approximately 9:59
3. 3

   A five-meter shaft stopped a factory for two days: the invisible cost of reactive maintenance

   We start with the simple record of failures, which seems like bureaucracy, but is what separates a quick stop from a disaster — the operator feels the strange noise, passes it on to maintenance, and that is where it is discovered whether it was service life or an assembly error, as in the case of bearings handled with gloves, a detail that brings down an entire line. And that is exactly what a five-meter shaft, with more than fifteen years of service, proved in practice: when it broke with no spare, it halted a factory with six hundred employees for two days, with three lathe operators and three milling machine operators taking turns nonstop to machine a part made of certified steel.

   People do not care about the bearing. There we use gloves to be able to handle the bearing, you know? To show you how much this, it is– a tiny little detail stopped an entire factory, an entire factory because of a bearing.

   ▶ Watch at approximately 14:59
4. 4

   Six mechanics per shift to change one shaft: the cost of not having a critical part in stock

   When a giant piece of equipment stops and six mechanics per shift are needed to disassemble it, the damage goes far beyond the repair: it breaks the schedule, diverts the team from other tasks, and even increases the risk of accidents due to the rush. We talked about the importance of mapping the critical points of production, showing that the part that cannot be missing is specific to each piece of equipment and process, and that a smart solution is to use reverse logic — from the finished product back to the start of the line — to find out where a failure would be fatal.

   The vast majority of accidents happen outside normal hours, mainly due to fatigue, lack of attention, overconfidence.

   ▶ Watch at approximately 19:59
5. 5

   Maintenance that thinks: when an adaptation becomes a permanent solution on the factory floor

   In this section, we dive into the world of maintenance beyond the simple act of swapping parts: we highlight the need to critically analyze what makes a component vital, considering not only the replacement time, but the real impact of a production stoppage. The discussion comes to life with a practical example from an injection molding factory where an old cylinder depended on an obsolete 'chevron' seal — instead of a makeshift fix, what we showed was an engineering line of reasoning that designed a permanent solution, machining an adapter ring for a modern oil seal.

   That was not a makeshift fix, it was a permanent adaptation.

   ▶ Watch at approximately 25:41
6. 6

   Perfectionism in the factory: what organizing the lathe teaches about maintenance and waste

   Is perfectionism a flaw or a quality? We talked about how the obsession with organization — from the cleanest lathe in the machining shop to the maintenance workshop — separates the professional who finds any tool when needed from the one who loses hours and money in chaos. And we showed, with a real case of a bearing that was never found, how the lack of a preventive method turns into pure waste, because the biggest cost hidden on the factory floor is that of time thrown away.

   I think this is something beneficial and very good, right? As long as it doesn't go beyond the acceptable limit.

   ▶ Watch at approximately 30:47
7. 7

   The hidden cost of not having the right part in rotomolding

   On the factory floor, the lack of preventive maintenance and suitable products can become a silent money drain: there were three cans of WD-40 per day and a stick of ordinary silicone to seal molds, an expense that exceeded R$ 5,000 per month without solving the real problem. We showed that switching to high-temperature silicone and overhauling bearings and chains with the right parts reduced waste and downtime, revealing that the biggest mistake is not the machine, but the lack of technical knowledge about what to use in each application.

   I think the waste already starts right there. It's you not knowing what to put in or not having the knowledge that there's a product on the market that can meet that need there.

   ▶ Watch at approximately 35:55
8. 8

   Bearing burning out every week? The play in the shaft was the real culprit

   When a bearing on the label machine was stopping production weekly, we discovered that the problem wasn't the part, but the play left in the shaft: when it expanded with heat, the bearing touched the hub wall and destroyed itself. We talked about how adjusting that play solved the issue and how critical items such as sensors, thermocouples, and belts require a cost-benefit analysis and strategic stock, avoiding downtime on the second shift, when everything tends to happen.

   We saw that the problem wasn't the bearing. The problem is that the play that was left in the shaft, when it expanded, the bearing touched the hub wall.

   ▶ Watch at approximately 41:01
9. 9

   The checklist that prevents downtime: critical parts you need on the shelf

   Corrective maintenance that burns an entire cycle because of a little flame control board irritated the factory floor — until we learned to replace it right there. In the episode, we told the real case of replacing bearings, belts, splices, and sensors, and revealed the solution we are preparing: an introductory burner maintenance course so you can identify the problem and decide when to call the technician or fix it yourself, with an advanced one for those who want to become specialists. We also talked about Start Roto, our free Wednesday track at 6 p.m., which teaches the basics of rotomolding for those just starting out.

   What are we going to do? What are we going to make available? A burner maintenance course.

   ▶ Watch at approximately 46:10
10. 10

    Lubrication in rotomolding: the mistake that locks up an entire oven

    On the factory floor, a customer who only resold parts decided to start producing and came to us without knowing where to begin; we showed him that he could start with partner molds and build up the structure little by little. Next, we talked about a critical mistake: assuming that blue grease is the same as red grease, without realizing that each color serves a specific application and temperature — and that a bearing without the right lubrication can lock the arm inside the oven, halt production, and even damage the mold. The warning is clear: the mechanic needs to know the critical points and even how to store grease correctly, because proper maintenance is what prevents disaster.

    What happens? It's you not knowing how to identify the type of equipment and the type of grease. Not just any grease will do.

    ▶ Watch at approximately 51:44
11. 11

    Scheduled downtime vs. Unexpected breakdown: the history that saves your mold from the sledgehammer

    On the factory floor, the difference between preventive maintenance and an emergency repair lies in a habit that seems simple but requires consistency: recording breakdowns, causes, and frequencies until you can see the pattern. Only with this history is it possible to schedule interventions before disaster strikes, sparing the machine and, above all, the mold — which often suffers at the hands of those who try to force it open with a sledgehammer or grinder, damaging the aluminum and creating burrs that turn into holes and rework.

    I actually saw the guy grab the grinder, on the mold. Good Lord, it hurt even my heart, it hurt even our soul, just watching.

    ▶ Watch at approximately 57:18
12. 12

    The invisible waste: why the 'lazy' one on the team may be your best investment

    In the factory routine, preventive maintenance isn't just changing grease — it's creating scheduled windows and knowing every part to avoid the invisible waste that eats away at productivity. We told the real case of a company that wasted more time opening molds with a wrench than in the machine cycle itself, until a simple power screwdriver solved most of the problem. And we defend the importance of having someone with a critical eye on the team — the one who complains about the manual labor and proposes solutions — because, in the end, it's that 'lazy' one who finds the way for the operator to arrive more rested and for production to yield much more.

    Always put a lazy person in the middle of your crew and you can be sure that this will be the first guy to say: "No, wow, this can't be done here

    ▶ Watch at approximately 1:02:24
13. 13

    Fatigue breaks logic: the sledgehammer won't assemble a self-aligning bearing

    On the factory floor, exhaustion beats reasoning: a team spent hours trying to assemble a giant gearbox, insisting on the lead sledgehammer until their physical and mental limit. That's when our host stepped in, not with force, but with preparation — he shimmed the bearing balls with strips of tin and showed that the logic of the situation is worth more than the blow. We talked about how necessity becomes the mother of invention and why multidisciplinary teams, who see beyond the task, solve problems that fatigue hides.

    You guys aren't reasoning. You learned that with the sledgehammer you can assemble it, that's not how it works.

    ▶ Watch at approximately 1:07:37
14. 14

    When a factory in 140 countries copied the Brazilian factory floor

    In the closing, we recalled a case that reveals the weight of factory-floor experience: a pioneering self-managed team effort not only prepared a national unit for market opening, but became a reference to the point that headquarters took two or three mechanics to share the experience in other countries — proof that those who live the problem up close carry the solution. It was this school of over forty years that gave us the foundation to speak about maintenance with authority, and it is with that same confidence that we recommend partners and stay attentive to the news we are preparing in the marketplace.

    That was a school for me, because it was an opening that was happening in the national market… the work that was done in there served as an example. So much so that they took two or three mechanics, the company's private jet, and sent them around the world to tell their experience in the self-managed team.

    ▶ Watch at approximately 1:12:51
15. 15

    Recycled resin, new episodes and the community that calls us out when we're late

    We talked about the behind-the-scenes of our work recommending and selling molds, used machines and partnerships with suppliers — including a quality resin that serves everything from the agricultural line to agro, always reinforcing that we don't own the truth and that we still have a lot to learn. We shared that we have already extended the invitation to bring Reciplast to a Rota Cast focused on recycled resin, and that next week there is confirmed news on Start Rota — this time with two episodes about a subject we prefer to leave in suspense.

    ▶ Watch at approximately 1:17:56