USA Rare Earth Oklahoma magnet line: capacity ramp and supply-chain lens for engineers
Reviewed by Tom Sullivan
First reported on MINING.com
30 Second Briefing
USA Rare Earth has commissioned Phase 1a of its commercial sintered neodymium-iron-boron (NdFeB) magnet production line at its 310,000-square-foot Innovation Lab in Stillwater, Oklahoma, enabling customer deliveries from Q2 2026. The line uses an oxygen-restricted jet milling process to reduce rare earth-metal powders to 3–5 microns before wet pressing, machining, coating and magnetising into aerospace, defence, semiconductor, energy and data centre-grade magnets. Capacity is planned to ramp to 600 mtpa by Q4 2026 and 1,200 mtpa with Phase 1b by Q1 2027, ahead of the Round Top mine start targeted for late 2028.
Technical Brief
- Jet milling is conducted in an oxygen-restricted environment to control oxidation of 3–5 µm powders.
- Wet pressing consolidates the fine rare earth-metal powder into large green blocks prior to machining.
- Final processing sequence includes machining, coating and magnetising to deliver commercial-grade sintered NdFeB magnets.
- More than 100 employees run end-to-end production at the 310,000-square-foot Stillwater Innovation Lab.
- Facility commissioning follows initial sintered magnet batches produced earlier in 2025, de-risking Phase 1a ramp-up.
- Round Top rare earth deposit in Texas is planned as the mine feed source from late 2028.
- USA Rare Earth is targeting a fully integrated mine-to-magnet value chain within the US jurisdiction.
Our Take
The Stillwater, Oklahoma magnet line effectively operationalises the $1.6 billion CHIPS-linked package flagged in the 26 January piece, signalling that USA Rare Earth is moving from funding announcements into physical critical-mineral manufacturing capacity on a tight 2026–2028 timetable.
With Oklahoma already courting Emirates Global Aluminium and other critical-mineral processors, USAR’s sintered NdFeB facility strengthens the state’s positioning in our coverage as a processing and component hub rather than a mining jurisdiction, which may influence where downstream EV and defence OEMs choose to localise supply chains.
The mutual sales and distribution arrangement with Arnold Magnetic Technologies means the 600 mtpa Phase 1a magnet capacity in Stillwater is being built into an existing customer and distribution network, reducing offtake risk compared with greenfield rare earth projects in our database that lack established magnet partners.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
Related Articles
Related Industries & Products
Mining
Geotechnical software solutions for mining operations including CMRR analysis, hydrogeological testing, and data management.
Construction
Quality control software for construction companies with material testing, batch tracking, and compliance management.
CMRR-io
Streamline coal mine roof stability assessments with our cloud-based CMRR software featuring automated calculations, multi-scenario analysis, and collaborative workflows.
QCDB-io
Comprehensive quality control database for manufacturing, tunnelling, and civil construction with UCS testing, PSD analysis, and grout mix design management.
HYDROGEO-io
Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.