{"id":3601,"date":"2026-10-29T16:39:20","date_gmt":"2026-10-29T08:39:20","guid":{"rendered":"http:\/\/www.amaroneonline.com\/blog\/?p=3601"},"modified":"2026-10-29T16:39:20","modified_gmt":"2026-10-29T08:39:20","slug":"what-is-the-maximum-speed-of-the-3115-motor-48b7-8621d1","status":"publish","type":"post","link":"http:\/\/www.amaroneonline.com\/blog\/2026\/10\/29\/what-is-the-maximum-speed-of-the-3115-motor-48b7-8621d1\/","title":{"rendered":"What is the maximum speed of the 3115 Motor?"},"content":{"rendered":"

Hey there, fellow gearheads, robot builders, and small motor enthusiasts! Let\u2019s cut to the chase\u2014you\u2019re here because you\u2019re deep in a project (maybe a drone, a compact conveyor, a robotic arm joint?) and stuck on that exact question: \u201cWhat\u2019s the maximum speed of a 3115 motor?\u201d Full disclosure\u2014I\u2019ve been supplying these motors for 7 years, and this is probably the question I get asked most. No fancy textbook jargon, just the real-world, on-the-ground answers I\u2019ve picked up from troubleshooting for thousands of builders. 3115 Motor<\/a><\/p>\n

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First, let\u2019s knock out the obvious: there\u2019s no one-size-fits-all max speed for a 3115. Wait, hold up\u2014before you close the tab, let\u2019s explain why. The 3115 is a tiny, brushless DC (BLDC) motor that\u2019s popular for its compact size (yeah, it\u2019s only 31mm in diameter, 15mm long\u2014perfect for tight spaces) and solid torque-to-power ratio. But max speed isn\u2019t a static number printed on a sticker; it\u2019s tied directly to a few key variables, and I\u2019ve seen these motors push way higher than some people expect, and way lower in other setups.<\/p>\n

Let\u2019s start with the two biggest culprits: Kv rating and input voltage. If you\u2019re new to motor specs, Kv is the RPM you get per volt of input, right? So a 3115 with a 5200 Kv rating running on a 3S LiPo battery (that\u2019s ~11.1V nominal, ~12.6V full charge) will spin way faster than a 4000 Kv model on the same voltage. But wait\u2014here\u2019s the part most builders skip: you can\u2019t just crank up voltage to hit a higher Kv-derived speed without consequences. Every 3115 has a mechanical max speed and an electrical max speed, and pushing past either is a one-way ticket to a fried motor.<\/p>\n

Let\u2019s break down real-world test data from my shop and the 1000+ units we\u2019ve shipped. For the standard off-the-shelf 3115 motors we supply (our most common line is 5200 Kv, 7200 Kv, and 9500 Kv variants):<\/p>\n