Prototype CNC Machine shop and 3D CAD design services located in Northern California



RSG Prototype Service is a prototype CNC machine shop that specializes in prototype and short run machining, 3D CAD design and manufacturing consulting for a variety of industries.

Work can be done entirely to your specifications or I can work under your guidelines to design and produce the complete project with drawings, if required.

Located in the Sierra Foothills, UPS Ground delivery is only one day away to anywhere in the San Francisco Bay Area, Sacramento or Northern California.


 Scientific, laboratory and space-based instrumentation with emphasis on microchannel plate detectors and related equipment.

Electronics enclosures

Design and fabrication of graphite fixtures for hydrogen furnace brazing of ceramic-to-metal parts.

Manufacturing jigs, fixtures, tooling and functional gauges.

Efficiency and Flexibility

RSG Prototype Service can design and/or manufacture your prototype project in a fraction of the time of many other companies. I can do this because I only do prototype work. I don’t do production jobs that would tie up the equipment for weeks or months at a time. Consequently, I have optimized my setup processes to the point where I can often produce “rush” jobs in just a few days, not several weeks. My prices are quite reasonable, considering the outstanding quality and service you will receive. I have an excellent network of colleagues and vendors that specialize in grinding, EDM, heat-treating, anodizing, metal plating and electropolishing, so you effectively have a full-service company with RSG Prototype Service. For new customers, I also accept payments through Square. See the Payments page for details.

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 Metals, including stainless and alloy steels, Kovar®, aluminum alloys, copper, brass, bronze and others.

Plastics, including PEEK, ULTEM®, Delrin®, Teflon®, polycarbonate, acrylic, polyethylene and others.


CUSIL braze foil alloy.

Quality and Value

Having spent a significant portion of my career working closely with the scientific community, I can understand the application of your project better than most job shops. I pay attention to the critical details that many shops will miss on a prototype project.  If there’s going to be a problem with the machining or assembly for any reason, I’ll usually catch it during the quoting process, before the parts are made. That’s why RSG Prototype Service is an excellent source for design for manufacturability consultation (DFM). Since I am very experienced in producing work that will be carefully scrutinized, you can be assured that you will get accurate parts that look great and work properly in all applications, including mission-critical situations.


 I use the current release of SolidWorks™ CAD software to examine and/or design your parts and assemblies in 3D. This helps me to see it as a working assembly (or not) before I make it so there are no surprises at assembly time. I can also collaborate with non-SolidWorks users using eDrawings Professional™, which will enable you to examine, measure and markup your project in 3D on your own computer screen. I can also translate most popular CAD formats.

For CNC machining, I use Mastercam™ CAM software to machine the part in the most efficient manner, greatly reducing programming time and practically eliminating programming errors.

electronics box with chem-film

Your One Stop Prototype CNC Machine Shop

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