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    About Us

Providing Engineered Mechanical Solutions since 1950,

SDP/SI is Your One-Stop Source for Mechanical Components, Engineering Development and Manufacturing.

Engineering Development and Precision CNC Machining

CNC Machinery
Using advanced technologies and the world’s best CNC machining, milling and turning equipment SDP/SI consistently produces precision gears and high-quality mechanical components.  Engineers, designers and those responsible for sourcing components depend on SDP/SI not only for machined and molded parts, but for engineering expertise. With unsurpassed experience our engineers provide customer support, often times leading to design improvements, cost, and time savings.

 Custom Components
Manufacturing customized components and constructing complex custom subassemblies for all applications, we partner with the most recognized names in medical & dental, aerospace, defense, recreational, and robotics industries.

Quality Management System - SDP/SI is ISO 9001 + AS9100 registered, ITAR Compliant – DDTC Registered, RoHS & REACH Compliant, Boeing BQMS Certified, and can supply DFARS compliant components as required.

Custom Solutions for Motion Control and Small Power Transmission

  • Precision Gears
  • Mechanical Components
  • Molded Parts
  • Assembly

Prototype to High-Volume Production

We Manufacture in a Variety of Materials
Precision machining in materials that include alloy steel, stainless steel, bronze, brass, acetal, nylon, aluminum, iconel, and titanium, we also provide heat treating, anodizing, zinc plating, painting and other services.
Built to Print
We manufacture to customers drawings and specifications ensuring every part will meet expectations for form, fit and function.

Get a Quote for Components and Assemblies – We can quote from your drawing or 3D CAD model. Get a quote using the online form, upload your drawing or model, specify materials, finishes, quantity and any special instructions.

Have Questions? We make it easy to get answers! – Our engineers and product experts provide support for product development, design for manufacturability, customized options and part selection. We look forward to working with you, Call (516) 328-3300.

Fairloc Model

Don’t Waste Your Time Searching – Standard components are used in a wide variety of small power transmission and motion control applications and SDP/SI offers 87,000 component options. As a proven source of mechanical components offered in a wide variety of types, sizes and materials we provide the information you need. Detailed product specifications, drawings and 3D CAD models can be easily downloaded at our E-Store where you can shop 24/7 for:
  • Precision and Commercial Grade Components
  • Timing Belts (toothed belts) and Pulleys
  • Gears
  • Shafting and Shaft Accessories
  • Bearings
  • Couplings
  • Gearheads and Speed Reducers
  • And More
Fairloc Model
Do You Spend Time Performing Modifications or Secondary Operations? We have helped many manufacturers increase production and profit by improving their output and decreasing downtime. With our manufacturing capabilities, modifications and secondary operations are easily accomplished. Eliminate unnecessary steps in your operation by letting us machine, add finishes, and ship parts that are ready to drop into your assembly. Let’s discuss your requirements; our engineers will help select the component best suited for your needs and go over the various options available for customizing.