Aerospace manufacturing in Illinois is a vital sector focused on producing components for both commercial and military aircraft. This industry includes a range of companies, from those specializing in casting and machining to entities developing high-tech propulsion systems. These firms are driving innovation with advanced manufacturing practices and a heightened awareness of sustainability as air travel evolves. Ongoing investments in technology, including automation and AI, are transforming operations, indicating a shift toward smarter manufacturing processes. Illinois' rich history in aviation provides a unique backdrop for these companies, ensuring a strong future built on collaboration and expertise.

The companies in this list vary in size, with most being medium-sized firms situated in key locations like Rockford and Downers Grove. Founded primarily in the mid-20th century, these companies focus on aerospace components, specialized systems, and engineering services. Notable firms like Northstar Aerospace and Rexnord Aerospace play crucial roles in supplying parts to major aircraft manufacturers. Together, these organizations highlight the competitive nature and significant innovative potential within Illinois' aerospace manufacturing sector.

Discover more about the top aerospace manufacturing companies in Illinois.

Top 22 Aerospace Manufacturing Companies in Illinois

1. Chicago Magnesium Casting Co

• Website: chicagomagnesium.com
• Ownership type: Private
• Headquarters: Dixmoor, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1953
• Headcount: 51-200
• LinkedIn: chicago-magnesium-casting-co

Chicago Magnesium Casting Co, founded in 1953, is a private manufacturing firm located in Dixmoor, Illinois. The company specializes in aluminum and magnesium sand casting, primarily for the aerospace industry. They produce intricate castings that are essential for various aircraft applications, including helicopters, jet fighters, and commercial jets. Their client roster includes major industry players such as Boeing and Honeywell, underscoring their significance in the sector. Chicago Magnesium is recognized for its commitment to quality, with certifications like ISO9001 and AS9100, and has received NADCAP accreditation for its special processes. The company is also focused on innovation, employing advanced technologies like 3D sand printing and fluid simulation to enhance production efficiency and reduce lead times. With a workforce of around 75 employees, Chicago Magnesium continues to evolve and expand its capabilities, including the recent announcement of a sister company, Midwest Aerospace Casting, aimed at furthering their reach in the aerospace market.

2. Northstar Aerospace

• Website: nsaero.com
• Ownership type: Private
• Headquarters: Bedford Park, Illinois, United States (USA)
• Employee distribution: United States (USA) 70%, Canada 30%
• Founded year: 2000
• Headcount: 501-1000
• LinkedIn: northstar-aerospace

Northstar Aerospace, founded in 2000 and based in Bedford Park, Illinois, is an aerospace manufacturer that specializes in producing components and assemblies for helicopters and fixed-wing aircraft. The company focuses on critical products such as gears, transmissions, and rotorcraft drive systems, which are essential for the performance and safety of aircraft. Northstar also provides maintenance, repair, and overhaul (MRO) services, ensuring that their products remain operational and reliable over time. With facilities in both the United States and Canada, Northstar Aerospace serves a global market and has built a strong customer base that includes prominent aerospace manufacturers like Boeing, Honeywell, and Lockheed Martin. Their commitment to quality is evident through their multiple certifications, including ISO 9001:2015 and AS 9100 D, as well as their NADCAP certifications for various manufacturing processes. This dedication to excellence positions Northstar Aerospace as a significant player in the aerospace manufacturing sector.

3. Ingenium Technologies

• Website: ingeniumtech.com
• Ownership type: Private
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2000
• Headcount: 51-200
• LinkedIn: ingenium-technologies

Ingenium Technologies, founded in 2000 and based in Rockford, Illinois, is an engineering services organization that specializes in aerospace engineering. The company offers a wide array of services, including concept and proposal design, detail design, engineering analysis, prototype design and manufacturing, development testing, qualification and certification, and production. With a team of over 50 engineers, each averaging more than 25 years of experience, Ingenium has worked on numerous projects across military and commercial aerospace sectors, as well as in other industries such as medical and land vehicles. Their client base includes prominent military organizations like the U.S. Department of Defense and various commercial OEMs, indicating their strong foothold in the aerospace market. Ingenium's commitment to quality and compliance with industry standards enhances their operational efficiency and effectiveness in delivering engineering solutions.

4. Danville Metal Stamping Co., Inc.

• Website: danvillemetal.com
• Ownership type: Private
• Headquarters: Danville, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1946
• Headcount: 201-500
• LinkedIn: danville-metal-stamping-co-inc-

Danville Metal Stamping Co., Inc. is a manufacturing firm based in Danville, Illinois, specializing in the fabrication and machining of metal components primarily for the aerospace and gas turbine industries. Established in 1946, the company has grown significantly, employing around 450 skilled professionals. Danville Metal serves major clients, including Pratt & Whitney and General Electric, providing high-quality parts through advanced manufacturing techniques. Their operations include a range of processes such as forming, conventional machining, laser cutting, and welding, which are essential for producing complex aerospace components. The company is committed to quality assurance, utilizing modern testing methods to ensure that all products meet stringent industry standards. With a focus on continuous improvement and innovation, Danville Metal aims to remain a reliable partner in the aerospace sector.

5. PMI Aerospace

• Website: pmiaerospace.com
• Ownership type: Private
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 81%, India 19%
• Founded year: 1961
• Headcount: 51-200
• LinkedIn: pmi-aerospace

PMI Aerospace, based in Rockford, Illinois, has been a player in the aerospace manufacturing sector since its founding in 1961. The company specializes in precision machined components, catering to the needs of major original equipment manufacturers (OEMs) across commercial, military, and space sectors. With a workforce of around 51-200 employees, PMI Aerospace operates modern facilities equipped with advanced CNC machining technology, including 3, 4, and 5-axis capabilities. Their services range from prototype parts to component and spare parts production, emphasizing quality and timely delivery. PMI Aerospace is ITAR registered and adheres to strict aerospace standards, ensuring that their products meet the rigorous demands of the industry. Their customer base includes prominent names like SpaceX and GE Aviation, highlighting their involvement in significant aerospace projects.

6. Rexnord Aerospace

• Website: aerospace.rexnord.com
• Ownership type: Private
• Headquarters: Downers Grove, Illinois, United States (USA)
• Employee distribution: United States (USA) 97%, Other 3%
• Founded year: 1946
• Headcount: 5001-10000
• LinkedIn: rexnord-aerospace

Rexnord Aerospace, based in Downers Grove, Illinois, has been a significant player in the aerospace components sector since its founding in 1946. The company specializes in producing high-quality aerospace bearings, seals, and gears, catering primarily to original equipment manufacturers (OEMs) in the aerospace industry. Their products are critical for various applications, including aircraft engines, landing gears, and flight control systems, ensuring the safety and efficiency of aircraft operations. Rexnord Aerospace operates through a trusted distributor network, providing global availability of their products. The company prides itself on its engineering expertise and commitment to delivering solutions tailored to the specific needs of its customers. With a dedicated workforce and a focus on quality, Rexnord Aerospace continues to support the aerospace industry with reliable and innovative components.

7. Aps

• Website: aircraftpropeller.com
• Ownership type: Private
• Headquarters: Lake Zurich, Illinois, United States (USA)
• Employee distribution: United States (USA) 44%, Malaysia 31%, Brazil 19%, Other 6%
• Founded year: 1953
• Headcount: 51-200
• LinkedIn: aircraft-propeller-service-llc

Aps, or Aircraft Propeller Service, is a private company based in Lake Zurich, Illinois, established in 1953. The firm specializes in aerospace services, particularly in the maintenance, repair, and overhaul of aircraft propellers. They cater to a variety of clients, including regional airlines, general aviation, and military customers, providing OEM licensed services. Aps operates facilities in Chicago, Sao Paulo, and Malaysia, which allows them to serve a broad spectrum of needs in the regional aircraft market. Their engineering and machining teams focus on high-precision manufacturing, and they are AS9100 certified, ensuring adherence to stringent quality standards in aerospace manufacturing. Aps has built a reputation over its 70 years of operation for efficiency, on-time performance, and customer service, making it a notable entity in the aerospace sector.

8. CEF Industries

• Website: cefindustries.com
• Ownership type: Private
• Headquarters: Addison, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1946
• Headcount: 51-200
• LinkedIn: cef-industries

CEF Industries, LLC, based in Addison, Illinois, is an aerospace manufacturer with a focus on mechanical and electro-mechanical systems tailored for the aerospace and defense sectors. Founded in 1946, the company has accumulated over 65 years of experience in producing critical components such as actuators, compressors, and pumps. These products are integral to the operation of various aircraft, serving both commercial and military applications. CEF Industries has established a reputation for quality and reliability, evidenced by their AS9100 certification, which reflects their adherence to stringent quality management standards. The company operates a modern manufacturing facility and employs a skilled workforce dedicated to engineering, manufacturing, and customer support. As a subsidiary of Transdigm, CEF Industries benefits from the resources and stability of a larger organization while maintaining a focus on customer-specific needs. Their extensive product portfolio is utilized in numerous aircraft types, reinforcing their significance in the aerospace manufacturing sector.

9. Ingenium Aerospace LLC

• Website: ingeniumaerospace.com
• Ownership type: Private
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2006
• Headcount: 51-200
• LinkedIn: ingenium-aerospace

Ingenium Aerospace LLC, founded in 2006 and based in Rockford, Illinois, is an aerospace manufacturer that specializes in motion control systems and rotating components for the aerospace and defense sectors. The company prides itself on providing custom-engineered solutions to complex challenges, catering to both military and commercial aerospace clients. Ingenium's expertise spans various applications, including actuation systems and rotating components for air, land, sea, and space environments. They support the entire product life cycle, from initial design through to aftermarket support, ensuring that their solutions meet the rigorous demands of the industry. Ingenium is recognized for its commitment to quality, holding certifications such as AS9100D and ISO 9001:2015, which affirm their adherence to high standards. Their strategic location within Rockford's aerospace cluster, which includes numerous suppliers and tier-one companies, further enhances their operational capabilities and industry connections.

10. Hinetics

• Website: hinetics.com
• Ownership type: Private
• Headquarters: Champaign, Illinois, United States (USA)
• Employee distribution: United States (USA) 95%, Sri Lanka 5%
• Latest funding: Other (Grant), $219,000, June 2018
• Founded year: 2017
• Headcount: 11-50
• LinkedIn: hinetics

Hinetics is an aerospace technology company based in Champaign, Illinois, founded in 2017 as a spin-off from the University of Illinois. The company specializes in electric propulsion systems and renewable energy solutions, focusing on the development of advanced electric motors and superconducting generators. These innovations are aimed at reducing fossil fuel consumption in aviation and other industries. Hinetics has established itself as a key player in the aerospace sector, with a customer base that includes aerospace manufacturers and renewable energy companies seeking to enhance efficiency and sustainability. The company has received significant funding, including grants from NASA and the National Science Foundation, to support its research and development efforts. Hinetics is committed to revolutionizing energy conversion in aviation, with products designed to electrify commercial regional jets and narrow-body aircraft, thereby contributing to a more sustainable future in air transport.

11. ERA Industries

• Website: eraind.com
• Ownership type: Private Equity
• Headquarters: Elk Grove, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2023
• Founded year: 1981
• Headcount: 201-500
• LinkedIn: aphelion-precision-technologies

ERA Industries, Inc., based in Elk Grove, Illinois, has been a player in the contract manufacturing sector since its founding in 1981. The company specializes in precision machining and assemblies, catering to a variety of industries, including aerospace, medical, military, space exploration, transportation, and semiconductor. With a workforce of around 73 employees, ERA Industries focuses on delivering high-quality components that adhere to strict industry standards. Their capabilities include advanced machining techniques such as 5-axis milling, turning, EDM, and aluminum vacuum brazing. The company is committed to quality, as evidenced by their AS9100 Rev D certification and ITAR registration, which are essential for aerospace manufacturing. ERA Industries has a history of expanding its capabilities through strategic acquisitions and partnerships, enhancing its service offerings in aerospace and military manufacturing. Their involvement in producing critical components for aerospace applications underscores their relevance in this sector.

12. Arrow Gear Company

• Website: arrowgear.com
• Ownership type: Private
• Headquarters: Downers Grove, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1947
• Headcount: 201-500
• LinkedIn: arrow-gear-company

Arrow Gear Company, founded in 1947 and located in Downers Grove, Illinois, is a precision gear manufacturer that specializes in high-quality gears and related products. The company serves a variety of industries, with a strong emphasis on aerospace and defense. Arrow Gear is known for its expertise in manufacturing aircraft quality hardened and ground gears, including spiral bevel gears and gearboxes, which are critical for both fixed-wing and rotary-wing aircraft. Their products are utilized in various applications, including jet engines and helicopter rotor systems. Arrow Gear operates a state-of-the-art manufacturing facility equipped with advanced technology for design, production, heat treatment, and inspection. The company has a robust history of innovation and has developed thousands of gear summaries over the years, showcasing their capability to meet demanding customer requirements. Arrow Gear is also a long-time member of the American Gear Manufacturers Association, reflecting their commitment to industry standards and practices.

13. AeroGen-TEK

• Website: aerogentek.com
• Ownership type: Corporate
• Headquarters: Paris, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2019
• Founded year: 2019
• Headcount: 51-200
• LinkedIn: aerogentek

AeroGen-TEK, based in Paris, Illinois, is a manufacturer that specializes in the production of complex fabrications and combustion components for the aerospace and industrial gas turbine markets. Founded in 2019, the company has quickly established itself by focusing on high-temperature super alloy components that are essential for turbine engine applications. AeroGen-TEK's operations include advanced manufacturing techniques such as CNC machining, laser cutting, and welding, which are critical for producing high-quality components. The company prides itself on its commitment to quality and timely delivery, ensuring that it meets or exceeds customer expectations. With certifications like AS 9100 and ISO 9001, AeroGen-TEK demonstrates its adherence to industry standards, making it a reliable partner for top OEMs in the aerospace sector. Their product offerings include combustion liner packages, transition ducts, and various hardware components, showcasing their capability to meet the specific needs of their clients.

14. Forest City Gear

• Website: forestcitygear.com
• Ownership type: Family Owned
• Headquarters: Roscoe, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1955
• Headcount: 51-200
• LinkedIn: forest-city-gear

Forest City Gear, founded in 1955 and based in Roscoe, Illinois, is a family-owned gear manufacturer known for its custom gear solutions. The company produces over 70,000 gears monthly, catering to a variety of industries, including aerospace, medical, and defense. Their expertise in high-volume gear production and advanced manufacturing techniques, such as CNC machining and gear inspection, ensures that they meet the stringent quality standards required in critical applications. Notably, Forest City Gear has contributed to significant aerospace projects, including the Mars Curiosity Rover, showcasing their capability to deliver precision components for complex systems. Their commitment to quality is underscored by certifications like ISO 9001 and AS9100, which are essential for maintaining high standards in aerospace manufacturing.

15. Accelerated Machine Design and Engineering LLC

• Website: accmach.com
• Ownership type: Private
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2008
• Headcount: 11-50
• LinkedIn: accelerated-machine-design-and-engineering-llc

Accelerated Machine Design and Engineering LLC, founded in 2008 and based in Rockford, Illinois, is a private company that specializes in engineering and manufacturing services. With a workforce of around 30 employees, the firm provides custom engineering solutions, machine manufacturing, and repair services. Their expertise spans various industries, including aerospace, defense, and healthcare. Notably, they focus on enhancing productivity and operational efficiency through tailored machinery and engineering expertise. The company has developed a reputation for producing high-precision manufactured parts, particularly for the aerospace sector, where they address the unique challenges of this demanding industry. Their services include complete machine builds, product assembly, and advanced testing and verification, all of which are essential for meeting the stringent requirements of aerospace manufacturing.

16. Flying S Inc

• Website: flying-s.com
• Ownership type: Private
• Headquarters: Palestine, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2001
• Headcount: 51-200
• LinkedIn: flying-s

Flying S Inc, based in Palestine, Illinois, is an engineering and manufacturing company that specializes in the aviation and aerospace sectors. Established in 2001 by David and Penny Shaw, the company began as an engineering consultancy and has since evolved into a manufacturer of composite airframe structures and CNC machined components. With a dedicated team of engineers and technicians, Flying S offers comprehensive solutions that allow for rapid prototyping and production. Their facility is equipped to handle projects from raw materials to finished products, ensuring quality and efficiency throughout the manufacturing process. The company has worked on various projects, including those for NASA, highlighting their involvement in significant aerospace initiatives. With a workforce of around 90 employees, Flying S emphasizes craftsmanship and attention to detail, which are essential in the aerospace industry.

17. Stanley Machining & Tool Corporation

• Website: stanleymachining.com
• Ownership type: Private
• Headquarters: Carpentersville, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1966
• Headcount: 51-200
• LinkedIn: stanley-machining-%26-tool-corporation

Stanley Machining & Tool Corporation, founded in 1966, is a private manufacturing firm based in Carpentersville, Illinois. The company specializes in CNC machining and assembly services, catering to various industries, including aerospace, defense, heavy equipment, and energy. With over 50 years of experience, Stanley Machining has developed a strong reputation for providing high-quality parts and solutions tailored to meet the production needs of its clients. The company is AS9100 certified, which underscores its commitment to quality management in aerospace manufacturing. Additionally, Stanley Machining is ITAR compliant, allowing it to work on sensitive defense projects. Their capabilities range from simple to complex machining and assembly, with a focus on supporting multi-program production demands. The company operates over 200 CNC machines and has a significant manufacturing footprint, which enables it to handle a wide variety of materials and project sizes. As a woman-owned small business, Stanley Machining emphasizes collaboration and integrity in its operations, striving to build successful partnerships across the aerospace sector.

18. Ingersoll Machine Tools

• Website: ingersoll.com
• Ownership type: Private
• Headquarters: Rockford, Illinois, United States (USA)
• Employee distribution: United States (USA) 95%, Italy 5%
• Founded year: 2003
• Headcount: 51-200
• LinkedIn: ingersoll-machine-tools

Ingersoll Machine Tools, Inc., founded in 2003 and based in Rockford, Illinois, is a private machine tool manufacturer. The company specializes in advanced manufacturing solutions tailored for industries such as aerospace, defense, and energy. Their product range includes additive and composite manufacturing machines, vertical and horizontal machining centers, and engineering services designed to improve production efficiency. Ingersoll's clientele primarily consists of businesses looking to enhance their manufacturing capabilities. Notably, the company has been involved in high-profile projects, including the construction of the Giant Magellan Telescope and contributions to NASA's Artemis and Orion missions, showcasing their relevance in the aerospace sector. With a workforce of approximately 178 employees, Ingersoll maintains a strong presence in the U.S. market, with a small percentage of operations in Italy.

19. Sciaky, Inc.

• Website: sciaky.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 95%, Brazil 5%
• Latest funding: Other (Grant), $189,000, January 2024
• Founded year: 1939
• Headcount: 51-200
• LinkedIn: sciaky-inc.

Sciaky, Inc., founded in 1939 and based in Chicago, Illinois, specializes in advanced welding systems and metal additive manufacturing technologies. The company is known for its Electron Beam Additive Manufacturing (EBAM) and electron beam welding services, which cater to industries such as aerospace and automotive. Sciaky's innovative EBAM technology allows for the efficient production of large, high-value metal parts, making it particularly valuable in aerospace applications where materials like titanium are often used. The company has a strong track record of working with significant aerospace clients, including Lockheed Martin, and has been involved in projects that support the production of critical components for military and commercial aircraft. Sciaky's commitment to research and development ensures that it remains at the forefront of manufacturing technology, providing solutions that meet the evolving needs of the aerospace sector.

20. Skandia Inc

• Website: skandiainc.com
• Ownership type: Corporate
• Headquarters: Davis Junction, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $84.0M, July 2018
• Founded year: 1983
• Headcount: 51-200
• LinkedIn: skandia-inc

Skandia Inc, founded in 1983 and based in Davis Junction, Illinois, is a manufacturing company that specializes in aircraft interiors and acoustic solutions. The company produces a variety of products, including acoustic materials, seating foam, and upholstery supplies. They cater to aircraft manufacturers and airlines, focusing on enhancing passenger comfort and safety. Skandia also offers services such as flammability testing and acoustic analysis, which are crucial for compliance with aviation safety standards. Their expertise is recognized in the industry, as they maintain an in-house team of Designated Engineering Representatives (DERs) and Designated Airworthiness Representatives (DARs) to support their clients. Skandia's commitment to quality and innovation has made them a trusted partner for various OEMs and completion centers in the aviation sector.

21. Blades Technology Company Ltd

• Website: btl.co.il
• Ownership type: Private
• Headquarters: Ontario, Illinois, United States (USA)
• Employee distribution: Israel 100%
• Founded year: 1968
• Headcount: 1001-5000
• LinkedIn: blades-technology-company-ltd

Blades Technology Company Ltd, established in 1968, is a manufacturer based in Nahariya, Israel, specializing in precision forged and machined components for the aerospace, industrial gas turbine, and medical industries. The company produces a range of high-quality products, including fan blades, compressor blades, and turbine blades, which are critical components in aircraft engines. With nearly four decades of experience, Blades Technology has developed advanced manufacturing processes that ensure adherence to strict industry standards. Their operations include in-house forging, machining, and finishing, allowing them to maintain control over quality and production timelines. The company has successfully transitioned from supplying spare parts to the Israeli Air Force to becoming a global supplier for major OEMs, demonstrating their growth and adaptability in the aerospace sector. Blades Technology is also expanding into the medical device market, leveraging their manufacturing expertise to produce orthopedic implants and other medical components.

22. Synergetic Industries, LLC

• Website: synergeticindustries.com
• Ownership type: Private
• Headquarters: Morton, Illinois, United States (USA)
• Employee distribution: United States (USA) 86%, China 14%
• Founded year: 2008
• Headcount: 51-200
• LinkedIn: synergetic-industries-llc

Synergetic Industries, LLC, based in Morton, Illinois, is an engineering and manufacturing firm that specializes in providing innovative solutions across various sectors, including aerospace and defense. Established in 2008, the company has grown to a team of approximately 40 employees, focusing on integrated engineering and manufacturing support. Their services range from product engineering and design to manufacturing engineering and custom builds. In the aerospace sector, Synergetic has over 20 years of engineering experience, contributing to projects involving military aircraft such as the F-15, F-18, and CH-47 Chinook, as well as commercial aircraft like the Boeing 737 and 787. Their commitment to quality and cost-effective solutions has made them a reliable partner for clients in need of engineering and manufacturing expertise.

Aerospace Manufacturing Insights: Key Companies in Illinois

Company	Headquarter	Size	Founded	Ownership
Chicago Magnesium Casting Co	Dixmoor, Illinois, United States (USA)	51-200	1953	Private
Northstar Aerospace	Bedford Park, Illinois, United States (USA)	501-1000	2000	Private
Ingenium Technologies	Rockford, Illinois, United States (USA)	51-200	2000	Private
Danville Metal Stamping Co., Inc.	Danville, Illinois, United States (USA)	201-500	1946	Private
PMI Aerospace	Rockford, Illinois, United States (USA)	51-200	1961	Private
Rexnord Aerospace	Downers Grove, Illinois, United States (USA)	5001-10000	1946	Private
Aps	Lake Zurich, Illinois, United States (USA)	51-200	1953	Private
CEF Industries	Addison, Illinois, United States (USA)	51-200	1946	Private
Ingenium Aerospace LLC	Rockford, Illinois, United States (USA)	51-200	2006	Private
Hinetics	Champaign, Illinois, United States (USA)	11-50	2017	Private
ERA Industries	Elk Grove, Illinois, United States (USA)	201-500	1981	Private Equity
Arrow Gear Company	Downers Grove, Illinois, United States (USA)	201-500	1947	Private
AeroGen-TEK	Paris, Illinois, United States (USA)	51-200	2019	Corporate
Forest City Gear	Roscoe, Illinois, United States (USA)	51-200	1955	Family Owned
Accelerated Machine Design and Engineering LLC	Rockford, Illinois, United States (USA)	11-50	2008	Private
Flying S Inc	Palestine, Illinois, United States (USA)	51-200	2001	Private
Stanley Machining & Tool Corporation	Carpentersville, Illinois, United States (USA)	51-200	1966	Private
Ingersoll Machine Tools	Rockford, Illinois, United States (USA)	51-200	2003	Private
Sciaky, Inc.	Chicago, Illinois, United States (USA)	51-200	1939	Private
Skandia Inc	Davis Junction, Illinois, United States (USA)	51-200	1983	Corporate
Blades Technology Company Ltd	Ontario, Illinois, United States (USA)	1001-5000	1968	Private
Synergetic Industries, LLC	Morton, Illinois, United States (USA)	51-200	2008	Private

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