Rotor Shaft Suppliers in United States

American Axle & Manufacturing (AAM) is a US Tier-1 drivetrain supplier that includes e-mobility drive units and precision-forging capabilities. Headquartered in Detroit, AAM operates 75 facilities in 16 countries. Its IATF 16949-certified operations deliver integrated electric powertrain solutions and metal-formed components for OEMs worldwide, leveraging vertical integration (forging to assembly) and a broad global footprint.

Sinotech Co., founded in 1983, is a US manufacturer of shafts for electric motors and other precision components. It uses cold-rolled steel and CNC gear hobbing/grinding to produce high-precision shafts. The ISO 9001 and IATF 16949-certified company focuses on JIT delivery for automotive customers and can make shafts up to 2-5/8" diameter.

Globally recognized precision gear maker for aerospace, medical, and performance automotive sectors. Forest City Gear is renowned for achieving extremely high quality (AGMA Q15) on fine-pitch gears, gear racks, and splines. Its capabilities include carburized and ground gears as small as 0.5” diameter for helicopter and racing transmissions. With AS9100D and ISO 9001 certifications (and a TS16949 legacy for automotive projects), this family-owned company combines over 65 years of expertise with continuous investment in cutting-edge gear grinders and metrology to deliver perfect results for the most demanding applications.

A custom gear job shop in the Chicago area specializing in emergency breakdown replacements and prototypes. Circle Gear & Machine produces one-off and small batch spur, helical, worm and bevel gears up to 48” in diameter, serving steel mills, racing teams, and industrial users since 1951. The company is known for rapid turnaround (“Rush Gear” service) and comprehensive in-house machining (including shaping, hobbing, CNC milling, and grinding). ISO 9001-certified, Circle Gear tackles complex reverse-engineering of obsolete or high-performance gears with craftsmanship and speed.

A third-generation family business in New Jersey specializing in custom gear cutting since 1946. Commercial Gear & Sprocket produces spur gears, helical gears, sprockets, and splined shafts in low-to-medium volumes for trucks, marine, and general machinery. The company’s nimble 40-person team provides quick turnaround on made-to-order gears up to 36” in diameter. With an ISO 9001 quality program, they serve both aftermarket automotive (e.g. vintage car gearsets) and industrial needs, offering personal service and engineering support for tricky gearing problems.

Dirksen Screw Products Co., founded in 1939, is a US manufacturer of cold-formed and precision-machined components for automotive applications. The ISO 9001 and IATF 16949-certified company leverages decades of experience and advanced inspection systems to meet OEM quality requirements. Customers value Dirksen’s expertise in producing tight-tolerance shafts (up to 2-5/8" diameter) with competitive pricing.

Ellwood Group Inc. (founded 1910) is a US heavy forging and foundry company producing large-diameter shafts and motor/generator components. It holds ISO/TS 16949 certification and can forge shafts up to 18" diameter and 168" length. With ~1,500 employees (10,001+ worldwide) and $250M annual sales, Ellwood supports high-volume production for OEMs requiring robust, precision shafts.