Contact Us


6919 51st Street
Kenosha, WI 53144

GEM Manufacturing, Inc. is a contract manufacturer specializing in high mix – low to mid volume CNC Turned and Milled products in a number of different industries. We manufacture over 2,000 different part numbers annually in volumes from 100 to 600,000. Our Commitment to servicing our customers through quality production, competitive pricing, and excellent customer service has been the bedrock of the company for 40 years. GEM is ISO 9001:2015 Registered, Single Source responsibility, Lean, Six Sigma, has latest technologies and the management team has over 100 years of combined machining industry experience.

Expertise… We are best at


GEM specializes in hydraulic machining and component manufacturing and offers a wide breadth of services including prototyping, engineering support, precision component manufacturing, finished device assembly, and supply chain management to bring maximum value to our partners. GEM has the range of capabilities to bring your product from concept to full production assembly.

GEM’s state-of-the-art facility boasts a robust quality department, dedicated prototyping resources, and a 500 square foot automated inspection lab with temperature and humidity control. GEM leverages dedicated continuous improvement staff to ensure that we are optimizing our quality, efficiency, and cost.

Energy and Transmission

GEM has been a trusted partner in the oil and gas industry for many years. GEM has a reputation for unwavering quality and dependability. Our advanced processes, leading technology, and dedicated staff ensures our customers’ highest level of satisfaction. GEM is skilled in a wide range of machining capabilities, materials, and quality methods (API Compliant). We are able to achieve results that many others in the industry are not because of our dedication to continuous improvement and consistently going above and beyond to satisfy our customers.

Heavy Equipment and Industrial

For over 3 decades the Agriculture industry has relied on GEM’s precision manufacturing capabilities including design for manufacturability, prototyping, machining, finishing and assembly. We are experts in serving the needs of the agriculture industry. We supply over 2,000 different parts to the industry including Pins, Shafts, Hubs, Spools, Housings, Bolts, Pulleys, Brackets and Light Assemblies.
Our quality standards satisfy (ISO 9001:2015), the industry’s requirements. GEM’s focus on continuous improvement matched with highly skilled talent and leading edge technology allows us to provide precision and defect-free manufacturing the industry demands.

Military and Defense

Military spec parts machining by GEM Manufacturing is designed to meet the most demanding standards of the Military. To us this is more than a specification; it is a mission we accomplish with components that are precisely on spec, delivered exactly when you need them.

GEM Manufacturing is proud to have earned its stripes serving both military customers and defense contractors for more than 25 years. The result is a set of benefits uniquely tailored to military needs.

Additional Markets

GEM services extend into a range of emerging markets.

Our engineering, manufacturing, and quality resources will reliably support your product from concept to launch.

Fluid Handling

Count on us to be your solution providers.


We employ continuous improvement principles to ensure we’re optimizing your return on investment.

Railroad and Heavy Truck

Our skilled staff leverages our extensive knowledge and experience to solve the most complex precision manufacturing requirements across industries.

Food Equipment

Decades of having our ISO 9001 certification ensures consistent processes which means quality parts.

Pump Manufacturing

Our 30 years of experience in manufacturing and supplying Kan Ban systems to this industry ensures quality, competetiveness, and on time delivery.