Sieber Tools: Our Partner for High Mix, Low Volume Manufacturing

Ergoseal is proud to highlight its sister company and partner, Sieber Tooling Solutions – a high-precision cold-forming tool manufacturer located in Carol Stream, Illinois. Since its founding in 1978, Sieber has grown to become a more comprehensive provider of cold-forming tool design and manufacturing services, drawing on global experience that dates to the 1950s.

In addition to being a full-service supplier and partner for the design, manufacture, and service of engineered cold-form tooling solutions, Sieber also offers CNC machining and contract manufacturing services, with specializations in low to medium volume, high mix, extreme precision, and tight tolerances. 

Their versatile capabilities serve a diverse range of industries, from ammunition to confectionery. They also include items like steering components, spark plugs, hydraulics, hand tools, propane, cans, and canning dies, construction, electronics, energy, fasteners/fittings, stamping, food, medical/pharmaceutical, mining, oil/gas, and fire extinguishers.  


Expanding its capabilities to include CNC machining and contract manufacturing services, specializing in low to medium volume, high mix, high precision, and tight tolerances, enables Sieber to maintain a steadfast commitment to quality. That dedication is evident in longstanding partnerships with customers, many of whom rely on Sieber as their only source for high-quality cold-formed tools and design services. With this expansion, they’re able to offer the following:  

Cold Header Tooling: Sieber specializes in designing and building tooling for cold header machines. Their team of experts uses finite element analysis (FEA) to evaluate the viability of tool designs and identify opportunities for improvement whenever they receive pricing inquiries for cold header tooling. 

Machining: Their state-of-the-art machining capabilities, powered by advanced CNC machinery, guarantee unmatched precision, exceptional surface quality, and precise tolerances within +/- 0.0001 inches. Whether it's CNC turning or precision tasks like lapping and polishing (up to 2 Microns), their proficiency assures top-tier precision machining across various applications.  

Contract Manufacturing: Sieber manufactures a comprehensive range of forging tools, including compact, multi-reinforced, dynamic opening and closing varieties. Their offerings span materials such as steel, PM steel, and tungsten carbide, complemented by a diverse array of coatings like CVD/PVD. 

Materials: They specialize in metal forming through advanced machining techniques, enabling the mass production of parts across a wide range of materials including steel, high-speed steel, tool steel, stainless steel, aluminum, carbide, copper, Inconel, titanium, and various exotic alloys. Sieber caters to unique alloy needs, guaranteeing the creation of high-quality components tailored to precise specifications. 

They specialize in catering to customers' unique needs, offering small batch sizes for customized products through multiple machining processes. While smaller production runs often come with high costs and extended lead times, Sieber ensures swift service. With a 24 to 48-hour turnaround time for quoting, and depending on project requirements, an average turnaround time of 2-3 weeks is achievable, providing unparalleled efficiency and reliability. 

Leveraging state-of-the-art technology like CNC equipment, finite element analysis (FEA) software, and CAD design tools, Sieber is poised for ongoing advancement and success, fueled by innovation and its dedication to customer satisfaction. 

Sieber was acquired by Ergoseal, Inc., in 2014, further expanding the industries, applications, and partners they serve. For more information on Ergoseal and their OEM and custom sealing solutions, visit or contact us today.