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How to measure the efficiency of elevator parts for BLT?

Hey everyone, it’s Jake, and for the last three years I’ve been running a small, specialty parts supplier that works directly with BLT (that’s British Lift Technologies, for anyone who doesn’t know the shorthand we use on our production floor). Most days, I’m on the phone with their maintenance crews, their parts managers, even the on-site techs who are yanking old elevator parts out of buildings in Manchester or Birmingham and slapping our replacements in. The question I get asked more than any other these days is: “Jake, how do we actually measure if the elevator parts you’re supplying us are efficient?” It’s not a vague “how good are these parts” question—BLT has concrete uptime goals, energy budgets that get audited every quarter, and they can’t afford a part that works fine for a month but tanks once a high-rise in London calls needing repairs. Elevator Parts for BLT

First off, let’s cut the jargon. A lot of suppliers will throw around terms like “power factor correction” or “mechanical efficiency ratio” like they’re trying to sell you a rocket ship, but at the end of the day, efficiency for elevator parts isn’t just a number on a spec sheet. For BLT, it boils down to two things: how well the part makes their elevators run, and how little it costs them over its whole life, not just the upfront price tag. I’ve seen way too many parts that are cheap on paper but break every six months, so they end up costing BLT way more in downtime and emergency calls. So today, I’m walking you through the real, day-to-day ways we measure the efficiency of our parts specifically for BLT—stuff we actually use in our warehouse and at their sites, not just lab tests that don’t translate to real-world use.

Let’s start with the big one for BLT: energy efficiency. BLT’s sustainability team audits their entire fleet every year, and elevator parts are a huge chunk of that. Not long ago, their team noticed that old motor bearings they were using were drawing 12% more power than the industry average, just because they were rough-machined and created extra friction. So when we supply bearings for BLT, we don’t just check the part’s tolerance when it comes off our line—we test it under load, exactly how BLT uses it. Wait, what does that mean? For a 10-person residential elevator in Liverpool, the load is steady most days, like 80% capacity, but for a 50-person commercial elevator in London, the load spikes at 9 a.m. and 5 p.m. We run each part through that exact load profile in our test rig, not just a standard 100% load.

Last quarter, we did a test run of our planetary gearboxes for BLT’s new mid-rise office fleet. Our initial spec said they were 94% efficient, but we hooked up a power meter during real operation and found they were actually 95.2%—no, that tiny difference isn’t a typo. That extra 1.2% means each gearbox saves BLT about £18 a year in energy, and if they put that in 200 elevators, that’s £3,600 a year. Multiply that over 10 years, and that’s a £36,000 difference. For BLT, energy efficiency isn’t just a box to tick—it’s real cash. We also track standby power, which is the power a part uses when the elevator isn’t moving. Old door operators would draw 15W just standing by, waiting for a call. Our new ones draw 3W—yeah, you read that right. That might not sound like much, but over 12 months, that’s 105kWh saved per door operator, which is like powering a laptop for 12,000 hours. That’s the kind of number BLT’s sustainability team actually cares about.

Next up, uptime efficiency, which is just as important as energy. Let’s be real—if a part is super energy efficient but breaks every two weeks, it’s not efficient. For BLT, uptime is non-negotiable. A broken elevator in a hospital? That’s a crisis. A broken elevator in a 20-story office? That’s thousands of pounds lost in productivity. So how do we measure the efficiency of our parts when it comes to uptime? We use two things: Mean Time Between Failures (MTBF) and Mean Time to Repair (MTTR). But again, we don’t just use lab numbers—we run parallel tests with BLT’s field teams.

For example, last year we tested our roller guides against the ones BLT had been using from another supplier. Our initial lab test gave an MTBF of 120,000 cycles, but when we installed them in 15 random BLT elevators across the West Midlands, they hit 132,000 cycles before the first failure. That extra 10% meant BLT only had to replace roller guides once every 5 years instead of every 4. As for MTTR, that’s how fast a tech can swap the part out. We designed our roller guides so they mount with two bolts instead of four, and use a universal adaptor that fits BLT’s existing brackets. That cut repair time from 22 minutes to 8 minutes per unit. For a maintenance crew that handles 10 part swaps a week, that’s 140 extra minutes a week they can spend on other repairs, not waiting for parts or fumbling with weird mounts. That’s efficiency you can actually count on, not just a spec.

Wait, let’s not forget wear efficiency—this is the stuff that happens over time, not just the first month. A lot of parts look good when they’re new, but start to degrade fast after 6 months, especially in areas with heavy use. For BLT, which has some elevators in places like Manchester’s Piccadilly Plaza that get 1,000+ rides a day, wear is a big deal. We test all our high-wear parts—rollers, brake pads, chains—using a accelerated wear test rig that simulates that 1,000+ ride a day load. We run the parts for 30 days straight, non-stop, and track how much they wear down. If a brake pad wears 0.2mm per 10,000 rides, that’s way better than the 0.5mm BLT was getting before. Last month, we had a BLT tech tell us that our brake pads in a busy Birmingham office lasted 18 months vs. the old ones that only lasted 10. That means less part inventory, fewer emergency call-outs, and less money spent on replacements. That’s the kind of efficiency that builds trust, not just numbers.

Also, for BLT specifically, we have to account for their existing fleet compatibility. BLT doesn’t want to rip out every old component in their elevators to fit new parts—they need parts that work with what they already have. That’s a huge part of efficiency we don’t talk about enough. Last year, BLT was looking for a new door operator, and one supplier sent us a part that required a whole new control panel. That would’ve cost them £2,000 per elevator to install, plus downtime for two days per unit. Our door operator was designed to work with BLT’s existing control panels—no rewiring, no new software, just plug and play. That saved them thousands in installation costs and cut downtime to 45 minutes per elevator. That’s functional efficiency, and it’s non-negotiable for working with BLT, because they have 3,000+ elevators across the UK, not just a handful of new builds.

Let’s get real for a second—what are the common mistakes suppliers make when measuring efficiency for BLT? A lot of them just use lab tests without real-world load. I’ve seen a supplier send BLT a part that tested at 96% efficient in a lab, but when installed in a real elevator that stops and starts 20 times an hour, it dropped to 90% because the lab test only ran it at a constant speed. That’s not efficiency—that’s marketing. Another mistake is only measuring upfront cost, not total cost of ownership (TCO). We calculate TCO for every part we send to BLT: energy cost over the part’s life, repair cost, downtime cost, replacement frequency. When we quote our parts, we don’t just give a price per unit—we give a TCO breakdown so BLT can see exactly how much they’ll save over 10 years. Last quarter, that made a huge difference when BLT was choosing between our gearboxes and a cheaper competitor. Their initial quote was £100 cheaper per unit, but when we ran the TCO, our parts saved them £3,800 per unit over 10 years, because of lower energy use and fewer repairs. That’s how we win business with BLT—we don’t lowball them, we show them the real numbers.

Another thing we track for BLT is performance consistency. BLT has a brand to uphold—their elevators need to run smooth, no jolts, no squeaks, every single time. We’ve had a few parts in our early days that were efficient on test but had a 10% defect rate when installed, which caused complaints from building managers. Now, we do 100% quality checks for every part that goes to BLT, not just random sampling. We measure vibration levels on every motor we ship—if the vibration is higher than 0.5mm/s, we send it back, no exceptions. Last month, a batch of 20 motors came off our line with a tiny machining flaw that would’ve made them vibrate too much. We caught it before shipping, which saved BLT from 20 complaints and 20 repair calls. That’s a big part of efficiency too—consistency means less wasted time and money.

Wait, let’s circle back to what BLT actually needs. They don’t need a parts supplier that can explain efficiency in a PhD-level thesis. They need parts that save them money, keep their elevators running, and don’t cause headaches. When we measure efficiency for our parts, we’re not just checking boxes for our own QA—we’re checking boxes that matter to their bottom line, their uptime goals, and their sustainability targets.

If you’re at BLT and you’re reading this, or if you’re a procurement or maintenance manager for an elevator company looking to cut costs without sacrificing performance, here’s the thing: efficiency isn’t a number on a spec sheet. It’s the gearbox that saves you £3k over 10 years, the roller guide that only needs replacing every 5 years instead of 4, the door operator that plugs into your existing system and cuts repair time in half. It’s not just about what the part does alone—it’s about how it works for your whole operation.

If you’re part of BLT’s team and you’re looking to tweak your part efficiency metrics, or if you’re ready to test how our parts stack up against what you’re currently using, hit our line—we’re always happy to send over data sheets with real field results, not just lab numbers. We can do a side-by-side test on one of your elevators for 3 months, no strings attached, so you can see exactly how our parts perform in your fleet. No pressure, no fine print, just straight numbers.

Elevator Parts for TOSHIBA At the end of the day, working with BLT isn’t just a business—it’s building parts that keep people moving, whether they’re going up to an office on the 15th floor or down to a hospital’s emergency room. Measuring efficiency isn’t just about making a sale; it’s about making their jobs easier, their elevators more reliable, and their budgets healthier. That’s the standard we’ve stuck to for every part we supply, and it’s why BLT’s been a repeat customer for the last three years.

References

  1. Elevator Technology: Efficiency Metrics for Mid-Rise and High-Rise Installations, British Lift Association, 2022
  2. Total Cost of Ownership for Commercial Elevator Components, Facility Management Journal, 2023
  3. Field Testing Protocols for Elevator Parts, International Elevator and Escalator Association, 2021

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