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

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

Prototypes for Design Review
Integration of Parts or Subassembly into a Larger System
Various Materials, Finishes and Surface Treatments

Modified Standard Components
Custom Gears, Gearboxes, Gearheads, and Mechanical Components

Custom Timing Belt and Pulley Drive Systems
Design Tools and 3D CAD Models

Prototypes for Design Review
Integration of Parts or Subassembly into a Larger System
Various Materials, Finishes and Surface Treatments

Modified Standard Components
Custom Gears, Gearboxes, Gearheads, and Mechanical Components

Custom Timing Belt and Pulley Drive Systems
Design Tools and 3D CAD Models
- ISO 9001 + AS9100 Certified
- Boeing BQMS Certified
- ITAR Compliant – DDTC Registered
- R.E.A.C.H. Compliant
- RoHS Compliant
Special Services
Send Us Your Blanks for Tooth Cutting – 3/16” to 4” ODMany 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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- J.I.T. Deliveries
- Blanket Orders
- Supply Chain Management
- Long Term Agreements
- Special Packaging
- Barcoding, U.P.C. Coding
- Customer Part Number
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.
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.