Brands

Get to Know SDP/SI and the Other Designatronics Brands
We manufacture and supply precision gears, superior mechanical components and customized power transmission and motion control solutions to aerospace, medical, defense, and robotics industries. Explore the many products, engineering and manufacturing capabilities and services provided by SDP/SI, Quality Bearings & Components, QTC Metric Gears, and WYBUR Tools here.

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Since 1950, SDP/SI has been the trusted source for precision mechanical components, custom subassemblies, and expert engineering support. From gears, couplings, and timing belts to motion control solutions, our extensive catalog of over 100,000 standard parts is backed by unmatched customer service and a team of engineers ready to help optimize your design. With instant access to CAD models, detailed product specs, and fast online ordering, our e-store makes it easy to find and implement the parts you need.

When off-the-shelf isn’t enough, we specialize in custom engineering and manufacturing, start to finish. Our integrated facility features state-of-the-art CNC machining, prototyping, and assembly, allowing us to deliver precision-tailored solutions with rapid turnaround times. Whether you're building low-volume prototypes or full-scale production runs, SDP/SI meets the most demanding performance and quality standards, proudly holding industry-leading certifications. Partner with us to streamline development, enhance reliability, and bring your innovations to life.

QTC METRIC GEARS is North America's premier source for precision metric gears and gear products, offering over 20,000 in-stock configurations to meet the growing demands of OEMs and industrial applications. From spur and helical gears to worms, racks, and gear couplings, we provide a vast selection of high-quality, ready-to-ship components for both replacement and new builds. As part of the Designatronics family, our decades of expertise and reliable inventory make us the go-to destination for off-the-shelf metric gearing solutions.

Need something custom? QTC delivers with modular manufacturing that supports a wide range of sizes, materials, and configurations, all with reduced lead times. Whether you're sourcing gears for automation, robotics, or motion control, we combine speed, flexibility, and technical support to help bring your project to life. Backed by a robust warehouse and engineering team, QTC METRIC GEARS is built to deliver precision and performance every time.

For over 50 years, WYBUR Tools has been a trusted manufacturer of high-performance tungsten carbide and high-speed steel burs—engineered to deliver precision, durability, and value. Produced in Cheyenne, Wyoming by the same expert technicians behind the legacy of Grobet USA®, WYBUR burs are built to reduce downtime, boost productivity, and stand up to the toughest materials. With expanded machining capabilities and the same commitment to quality, we continue to set the standard in cutting and deburring tools.

Available globally through authorized WYBUR distributors, our carbide and HSS burs are precision-tested for performance across a wide range of metals and non-ferrous materials. From aggressive stock removal to fine detail work, WYBUR Tools offers reliable, cost-effective solutions for grinding, shaping, and finishing - making us the preferred choice across industries worldwide.