{"id":603,"date":"2026-10-15T12:21:52","date_gmt":"2026-10-15T04:21:52","guid":{"rendered":"http:\/\/www.albenisi.com\/blog\/?p=603"},"modified":"2026-10-15T12:21:52","modified_gmt":"2026-10-15T04:21:52","slug":"what-is-the-weight-of-a-dc-gearmotor-40cd-0f0da6","status":"publish","type":"post","link":"http:\/\/www.albenisi.com\/blog\/2026\/10\/15\/what-is-the-weight-of-a-dc-gearmotor-40cd-0f0da6\/","title":{"rendered":"What is the weight of a DC gearmotor?"},"content":{"rendered":"

Hey there, let\u2019s talk about something I get asked at least 5 times a day in my DC gearmotor supply biz: What\u2019s the actual weight of a DC gearmotor?<\/em> Not the random number someone pulled from a specs sheet, not a guess, but the real, \u201cthis is what you need to know if you\u2019re designing a conveyor or a AGV\u201d weight. I\u2019ve been selling these things out of my warehouse (yeah, I\u2019m the guy behind the counter who grabs the boxes and hears your \u201cwait, that\u2019s lighter than I thought!\u201d comment) for 7 years, and let\u2019s be real\u2014most sites overcomplicate this, or give a range so wide it\u2019s useless. Let\u2019s break this down like we\u2019re geeking out over parts in my back office, no fancy jargon. DC Gearmotor<\/a><\/p>\n

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First, let\u2019s kill a myth right now: there\u2019s no one-size-fits-all answer. A lot of new engineers or small business owners (like the startup that builds custom warehouse carts last month) show up thinking all DC gearmotors are \u201cX ounces\u201d \u2014 nope. The weight depends on three big things, and I see every single one play out in my inventory room: the motor\u2019s power, the gear ratio, and the type of gearhead. Let\u2019s go through each with real numbers, not textbook garbage.<\/p>\n

Power is the first big one. If you\u2019re looking at a tiny 12V motor for a robotic vacuum or a small desk fan? That\u2019s your light stuff. I have a sample pack on my desk: a 10W DC gearmotor, the kind used in those little window vent openers, that weighs like 0.8 lbs. I\u2019m holding one right now as I type\u2014super light, plastic gearhead, small steel motor housing. Now jump up to the workhorses: a 500W DC gearmotor for a conveyor belt or a small automated gate. That\u2019s around 8 lbs. Then go even bigger\u20141kW for a golf cart or a heavy AGV? That hits 25 to 35 lbs easy. I just shipped a 1.2kW unit yesterday to a farm supply company for their hay bale conveyor, and that box was 32 lbs before packaging. See the gap? 10W is 0.8 lbs, 1kW is 35 lbs\u2014huge difference, and power is the #1 driver here.<\/p>\n

Next, gear ratio. This trips everyone up. A lot of folks don\u2019t realize the gear ratio changes weight a lot, even if the power is the same. Why? Because higher ratios mean more gears, right? If you need a 5:1 ratio (low torque, fast speed, like a remote control car), that gearhead is tiny, weighs almost nothing. But if you need a 100:1 ratio (super low speed, high torque, like a door that closes slowly or a conveyor that doesn\u2019t snap packages)? That gearhead has more gear stages, thicker gears, maybe more steel to handle the torque, so it adds weight. Let me grab an example I\u2019ve tested: same 200W motor. 20:1 ratio is 2.2 lbs. 100:1 ratio is 3.7 lbs. That\u2019s almost a pound and a half extra just for the gears. I had a customer last month who ordered a 100:1, then canceled and ordered the 20:1 because they thought the extra weight would make their cart too heavy\u2014so that ratio thing is not trivial.<\/p>\n

Third, gearhead type. This is where I see people make mistakes that cost them time and money. There are three main gearheads we stock (and I\u2019ll tell you which ones we push for what): spur gear, worm gear, and planetary gear. Spur gear is the cheapest, most common, uses straight-cut gears\u2014usually lightest, because they\u2019re simpler, less material. A spur gearhead for a 500W motor is about 7 lbs, as I said earlier. Worm gear is better for high torque, self-locking (so the motor doesn\u2019t spin backward on its own), but the gear set is bulkier, uses more metal, so it\u2019s heavier. That same 500W motor with a worm gear? 8.5 lbs. Planetary gear is the fancy one for tight spaces, high efficiency, more expensive, and super compact\u2014wait, but weight? A good planetary gearhead is actually heavier than spur for the same power because the planetary design uses multiple small gears to distribute torque, so more steel parts. 500W planetary is 9 lbs. Yeah, I know, it\u2019s the opposite of what you\u2019d think for \u201ccompact,\u201d but that\u2019s how it works. I always tell customers: if you don\u2019t need self-locking or super tight space, stick with spur\u2014saves weight and cost.<\/p>\n

Now, let\u2019s get to the actual ranges we see every day in our stock, because that\u2019s what you actually care about. I sorted my inventory by weight just last week for a big shipment, so these numbers are real, not pulled from a spec sheet:<\/p>\n