{"id":110611,"title":"Mass Magnetics: USA-made magnets","tagline":"Vertically integrated magnet manufacturing for aerospace, robotics and defense.","body":"### **TL:DR; Mass Magnetics makes American magnets in minutes.**\n\n🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲🧲\n\n![uploaded image](/media/?type=post\u0026id=110611\u0026key=user_uploads/3652354/be41c9e5-378d-452f-a111-10380035f14d)\n\n**Every electric motor runs on rare-earth magnets.** EVs, drones, robots, wind turbines, guided munitions: nearly all of them are dependent on Chinese magnets. On January 1st, 20270, [regulation changes will make it illegal to deliver anything that walks, drives, or flies to US Defense if it contains a magnet produced in covered countries like China.](https://www.massmagnetics.com/comply) The domestic supply chain meant to replace it doesn't exist yet. **Mines take a decade to permit, and the ore they pull up leaves radioactive tailings behind, making permitting magnet mining a nightmare.**\n\nWe’re[ ](https://www.linkedin.com/in/energyeric)the founders, [Eric Silver](https://x.com/metalscontent) and [Matthew Grol](https://www.linkedin.com/in/matthew-groll/)l (left and right in the pic below). We’ve known each other since grade school. Since then, Eric’s built multiple battery pilot production lines and materials science labs in the Midwest for NSF-funded companies. Matthew’s built exquisite aerospace gear including Moon-regolith melters and ultra-precise guidance systems for the world’s foremost labs at NASA, Draper, and MIT. **Together we’re making one bet: America's rare-earth problem isn't a mining problem.**\n\n![uploaded image](/media/?type=post\u0026id=110611\u0026key=user_uploads/3652354/2046e9de-2db6-47e8-91fc-651e31e5a834)\n\n**Mass Magnetics’ unfair advantage is sitting in end-of-life electric vehicles, hard drives, and industrial equipment.** The team uses AI models and robotics trained on real scrap to sort metallurgy by exact grade and chemistry. Then, a rapid-sintering process takes that reclaimed mass to a finished magnet in 3 minutes, where conventional approaches take over 4 hours. The result is a magnet as strong as anything imported, with no radioactive footprint or bureaucratic permitting, fully compliant for US defense.\n\n**If you build robots, drones or motors visit our site and reach out at [outreach@massmagnetics.com](mailto:outreach@massmagnetics.com) and get your magnets.**\n\n![uploaded image](/media/?type=post\u0026id=110611\u0026key=user_uploads/3652354/797eff3c-6d9d-4ffc-894b-664aece1ba74)\n\n","slug":"Sm3-mass-magnetics-usa-made-magnets","created_at":"2026-08-18T14:30:00.079Z","updated_at":"2026-09-19T07:03:34.492Z","total_vote_count":7,"url":"https://www.ycombinator.com/launches/Sm3-mass-magnetics-usa-made-magnets","share_image_url":"https://www.ycombinator.com/media/?type=post\u0026id=110611\u0026key=user_uploads/3652354/be41c9e5-378d-452f-a111-10380035f14d","company":{"id":32128,"name":"Mass Magnetics","slug":"mass-magnetics","url":"https://massmagnetics.com/","logo":"https://bookface-images.s3.amazonaws.com/small_logos/26161cef0e683292e39a5da2d6258b38702473a0.png","batch":"Summer 2026","industry":"Industrials","tags":["Hard Tech","Robotics","Drones","Manufacturing","Defense"],"search_path":"https://bookface.ycombinator.com/company/32128"}}