{"id":551,"date":"2026-10-09T08:13:21","date_gmt":"2026-10-09T00:13:21","guid":{"rendered":"http:\/\/www.sarobarclinic.com\/blog\/?p=551"},"modified":"2026-10-09T08:13:21","modified_gmt":"2026-10-09T00:13:21","slug":"what-is-the-vibration-level-of-a-customized-motor-4e04-1d6a3d","status":"publish","type":"post","link":"http:\/\/www.sarobarclinic.com\/blog\/2026\/10\/09\/what-is-the-vibration-level-of-a-customized-motor-4e04-1d6a3d\/","title":{"rendered":"What is the vibration level of a customized motor?"},"content":{"rendered":"

Hey everyone, it\u2019s Jake from the customized motor shop \u2013 the guy who\u2019s actually on the floor tweaking windings instead of just staring at spreadsheets. Last week I got a call from a small robotics startup that\u2019s been driving me a little nuts, honestly. They kept asking the same question on repeat: \u201cWhat\u2019s the vibration level of your customized motors?\u201d Like, it\u2019s not a one-number answer, and I think that\u2019s where most people go wrong \u2013 they expect a static spec, but when you build a motor from scratch for your<\/em> application, vibration isn\u2019t just a metric. It\u2019s make-or-break for their robot arm that handles microchips, right? One bad vibration and they\u2019re tossing $50k of silicon down the drain. Let me break this down like I would over a cold soda in the break room, no fancy jargon that makes your eyes glaze over. Customized Motor<\/a><\/p>\n

<\/p>\n

First, let\u2019s get this straight: generic off-the-shelf motors have a set vibration level, right? Like, you can grab a NEMA 23 motor from any catalog and it\u2019ll list a \u201cvibration severity\u201d number, usually in mm\/s or g-force, at a specific speed. But that\u2019s for a one-size-fits-all motor, built to work for 10 random tasks. Customized motors? We start with the end goal. That startup\u2019s arm runs at 1,200 RPM, carries a 2kg load, and has to stop in 0.1 seconds without shaking. So when we build a motor for that, we\u2019re not just tuning the windings \u2013 we\u2019re adjusting every tiny part that causes vibration. Let\u2019s talk about where motor vibration even comes from, because that\u2019s half the battle. Most off-the-shelf motors get vibration from things like imperfectly stamped laminations (the metal stacks that make up the core), slight imbalances in the rotor, or even the bearings that get pressed on by a machine with 0.05mm of tolerance. For a custom motor? We fix those before assembly, not after.<\/p>\n

Let\u2019s talk numbers, because everyone loves numbers. Wait, but not the random ones the catalogs throw at you. For context, let\u2019s use common vibration severity ratings \u2013 the ISO 10816 standard, which everyone in the motor world actually uses (I swear, this is the only standard I don\u2019t skip). For general-purpose industrial motors, ISO says a \u201cgood\u201d level is under 2.8 mm\/s at rated speed. That\u2019s like, a motor driving a conveyor belt, who cares if it\u2019s a little shaky. But for precision applications \u2013 think robotics, medical devices, 3D printers, those microchip handling arms we talked about \u2013 you need way lower. Like, 0.1 to 0.5 mm\/s. That\u2019s quiet, almost unnoticeable vibration. But wait, here\u2019s the catch: that number only matters at the exact speed and load you\u2019re using the motor for<\/em>. I can build a custom motor that hits 0.3 mm\/s at 1,200 RPM under 2kg load, but if you spin that same motor at 6,000 RPM, the vibration goes up \u2013 because centrifugal force makes even tiny imbalances bigger. That\u2019s the part the startup missed, and it\u2019s why they were bugging me so much. They were comparing my custom motor\u2019s 0.3 mm\/s at their operating speed to a generic motor\u2019s 1.0 mm\/s at its max<\/em> speed, which is apples to oranges.<\/p>\n

Now, how do we actually get that vibration level? When I\u2019m building a custom motor, every step checks for vibration hot spots. First, the rotor: we dynamic balance it, not just static balance. Generic motors get static balanced, which means they spin it slow and add weight to offset heavy spots. But when you spin a rotor fast, tiny bends or uneven mass cause what\u2019s called dynamic imbalance \u2013 that\u2019s when the top is heavy but the bottom is light, so it wobbles like a top when you speed it up. For our custom rotors, we spin them up to 120% of their max operating speed and trim the rotor stack or adjust the magnets until the dynamic imbalance is less than 0.1 gram-inch. That\u2019s crazy tight \u2013 a single grain of sand is about 0.0005 grams, so we\u2019re balancing to less than 20 grains of sand difference. Small stuff, but it makes a huge dent in vibration.<\/p>\n

Next, bearings. I don\u2019t use generic bearings from a bulk pack for custom builds. I spec high-precision angular contact bearings, or even ceramic bearings for high-speed, low-noise applications. And when we press them onto the shaft and into the motor housing, we use a press that has a load cell \u2013 no banging them on with a hammer like the old days. A bad press job can throw bearing alignment off by a tiny fraction of a millimeter, and that causes vibration that\u2019ll mess up even the best balance job. Then we do a run test: spin the motor for 30 minutes at operating speed, log vibration data with an accelerometer, and tweak alignment or shim the housing if needed. Last month we built a motor for a surgical robot\u2019s linear actuator \u2013 that one needed to hit under 0.2 mm\/s at 3,000 RPM, and the only way we got there was shimming the front bearing by 0.02 mm. No one would ever see that, but the surgeon noticed when the tool was moving too shaky during tests. That\u2019s the stuff they don\u2019t tell you about custom motors.<\/p>\n

Wait, but what if someone needs a custom motor for a different app? Let\u2019s say a farm irrigation system that needs to spin a big valve \u2013 vibration isn\u2019t a big deal there, right? We can build that to a lower, cheaper standard, like 2.0 mm\/s at 1,800 RPM, because the valve\u2019s not carrying microchips. That\u2019s the beauty of custom: we don\u2019t waste money on super tight tolerances when you don\u2019t need them. The startup realized that after I sent them their test data \u2013 their generic motor was hitting 2.2 mm\/s at 1,200 RPM, which is why their robot arm was dropping chips, and my custom one was at 0.28 mm\/s, exactly what they needed, and only cost $400 more than the off-the-shelf part they were looking at. That\u2019s the value right there: not just building a motor that fits their specs, but tuning vibration to their exact operating conditions, not a catalog spec.<\/p>\n

Another thing people forget: load matters. If you\u2019re running a motor at 50% of its rated load, vibration is lower. Run it at 120% overload, and that changes everything. Custom motors are built to run at specific loads, so we tune the winding and lamination design to minimize magnetic vibration too. Magnetic vibration comes from the gaps between the stator and rotor \u2013 if the air gap isn\u2019t uniform, the magnetic pull isn\u2019t equal, and that causes a hum or shake. For generic motors, the air gap is usually around 0.2 to 0.5 mm, and there\u2019s some variation from part to part. For custom motors, we hold the air gap to \u00b10.02 mm \u2013 that\u2019s like the thickness of a piece of paper. No more uneven magnetic pull, so no more vibration from the magnetic side. That\u2019s a big one I don\u2019t see talked about enough; most vibration blogs only mention mechanical stuff, but magnetic vibration is 30-40% of the total in many small motors.<\/p>\n

Let\u2019s get real about what\u2019s possible, because I don\u2019t want to promise the moon and then deliver a dud. If you need a custom motor for a precision application, the lowest vibration level we can consistently hit is around 0.08 mm\/s (that\u2019s super, super quiet \u2013 like, you\u2019d barely hear it over a library). For most industrial robotics, medical, or automation apps, 0.2 to 0.5 mm\/s is standard. If you don\u2019t need precision, like a fan motor or a conveyor, we can do 1.5 to 3.0 mm\/s, which is totally fine and way cheaper. And the best part? We can adjust this for any speed or load. Need a motor that hits 0.4 mm\/s at 6,000 RPM? No problem, as long as you tell us that\u2019s your operating speed, not just the max.<\/p>\n

The startup that called me last week? They ended up going with our custom motor, and just sent me a text saying their test run had a 98% success rate on microchip handling \u2013 before, they were at 72% because of vibration. That\u2019s the payoff. So if you\u2019re out there shopping for a motor, stop asking \u201cwhat\u2019s your vibration level?\u201d and start asking \u201cwhat\u2019s your vibration level at my operating speed and load<\/em>?\u201d Because that\u2019s the number that actually matters. Generic specs are a starting point, but customization is about making it work for your<\/em> needs, not the masses.<\/p>\n

<\/p>\n

Let me wrap this up. Custom motor vibration isn\u2019t a single number \u2013 it\u2019s a tailored metric, built from balancing, bearing choice, air gap control, and tuning to your exact app. It\u2019s not about the tightest tolerances for the sake of it, it\u2019s about getting exactly what you need without wasting money on stuff you don\u2019t. If you\u2019ve got a project where generic motors are too shaky, or they break too often because they\u2019re not built for your load or speed, hit us up. We\u2019ll build you a motor, run the vibration tests, and send you the exact data for your<\/em> use case, not some catalog fluff. No pressure, no weird hoops to jump through, just a motor that works for you.<\/p>\n

WP Gearbox<\/a> Reference:<\/p>\n

    \n
  1. ISO 10816-3: Mechanical vibration \u2013 Evaluation of machine vibration by measurements on non-rotating parts \u2013 Part 3: Industrial machines with nominal power above 15 kW and nominal speeds between 120 r\/min and 15 000 r\/min when measured in situ, International Organization for Standardization, 2014.<\/li>\n
  2. Kennedy, J. G., Vibration Analysis of Electric Motors, CRC Press, 2018.<\/li>\n
  3. National Electrical Manufacturers Association (NEMA), Standard MG 1: Motors and Generators, Part 1: General Requirements, NEMA, 2021.<\/li>\n<\/ol>\n
    \n

    Hangzhou ANG Drive Co., Ltd.<\/a>
    As one of the most professional customized motor manufacturers and suppliers in China, we’re featured by quality products and good service. Please rest assured to wholesale customized motor from our factory. Good service and quality products are available.
    Address: No.185, Jincheng Rd., Hangzhou 311202, China
    E-mail: export2@angdrive.com
    WebSite:     https:\/\/www.anjodrive.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey everyone, it\u2019s Jake from the customized motor shop \u2013 the guy who\u2019s actually on the … What is the vibration level of a customized motor?<\/span>Read more<\/a><\/p>\n","protected":false},"author":15,"featured_media":551,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[514],"class_list":["post-551","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-customized-motor-4956-1da647"],"_links":{"self":[{"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/posts\/551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/comments?post=551"}],"version-history":[{"count":0,"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/posts\/551\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/posts\/551"}],"wp:attachment":[{"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/media?parent=551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/categories?post=551"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sarobarclinic.com\/blog\/wp-json\/wp\/v2\/tags?post=551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}