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   SDP/SI Capabilities - Complete In-House Engineering Development, Customer Support and Special Services

Complete In-House Engineering Development, Customer Support and Special Services

Our engineering and manufacturing teams will partner with you throughout the entire process.

Facing a design challenge? Let SDP/SI engineers provide the custom solution to meet your specific requirements. Our engineers and manufacturing teams routinely partner with OEMs in aerospace, medical, defense, and robotic industries, providing the individualized customer support each project merits. With proven performance and unsurpassed experience our engineers are here to help!

For the best results involve SDP/SI engineers and manufacturing experts during the concept and early design stage of a project. Based on more than 70 years of experience and technical skills, our input can optimize performance, help lower costs, simplify assembly, make more compact in size, and design for manufacturability.

To ensure success of your project, consideration must be given to all phases of product development from prototype and validation to large volume manufacturing and assembly. SDP/SI applies quality tools at all stages so that the final product meets customer specifications and is manufacturable. For prototypes, life of the product support, next generation, individual components, and construction of intricate subassemblies we look forward to working with you.



Engineering Development and Reverse Engineering

Prototype to Production
Prototypes for Design Review

Integration of Parts or Subassembly into a Larger System

Various Materials, Finishes and Surface Treatments

Secondary Operations
Modified Standard Components

Custom Gears, Gearboxes, Gearheads, and Mechanical Components

Miniature FHT Belt Drive System
Custom Timing Belt and Pulley Drive Systems

Design Tools and 3D CAD Models



Special Services

Send Us Your Blanks for Tooth Cutting – 3/16” to 4” OD
Many companies rely on SDP/SI for their tooth cutting needs. With the world’s most advanced manufacturing equipment we provide fast turnaround while meeting your exact specifications. Cut and deburr Fine Pitch to Medium Pitch Gears, Pulleys, Worm Gears, Bevel Gears, and Helical Gears.

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Complete Manufacturing Capabilities and Equipment


OEM Design Engineers, Machinists, Students, Hobbyists and others rely on SDP/SI for all their small mechanical components and precision gear requirements. Over 87,000 high-quality machined components, molded parts and precision gears are featured in our catalogs.

SDP/SI Catalogs are found on desks around the world because they not only provide detailed product information, but prove to be a handy reference tool when designing. Each catalog features a technical section to assist in designing a Synchronous Drive System - Timing Belts, Pulleys, Chains and Sprockets (Inch Catalog) and a gear drive, Elements of Gear Technology (Metric Catalog). Also included are conversion tables, formulas of energy, inertia, torque, power and work, and various standards and dimensions for inch and metric fasteners, timing belts, pulleys, and much more.

Request your copy today and get product specifications plus technical data for inch and metric precision gears, plastic gears, timing belts, pulleys, sprockets, roller & ladder chains, couplings, bearings, clutches, brakes, speed reducers, gear assemblies, planetary gearheads, and more.

You can download or request our print catalogs by following the links below.

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