About

Optima Precision is a CNC machine shop in the heart of Silicon Valley. Drawing on over 15 years of experience, we specialize in prototype and production for the semiconductor, biotech and aerospace industries. We offer high quality CNC milling, CNC turning and 5 axis machining as well as welding, sheet metal fabrication and EDM (Electronic Discharge Machining). We assist our customers with getting a finished product that includes assembly and a complete array of surface finishing including electropolishing, anodizing and other types of plating and coating services. Our state of the art inspection includes a Swiss made Tesa CMM to assure our customers of the highest quality product.

Our shop offers the highest quality parts at a low cost. We are able to efficiently manufacture parts from various types of aluminum, steel, titanium, copper, brass and all types of available plastics, all the while holding tight tolerances to meet your specifications. Besides these standard materials, we are also capable of fabricating parts from more exotic materials like molybdenum or beryllium copper.

We are a family owned business; this enables us to work closely with our customers on DFM and cost reduction solutions. We can reverse engineer any existing part you might have and reproduce it or provide CAD files. This is especially useful when replacing machine parts that are no longer available or prohibitively expensive. If you would like a tour of the facility we would be honored to have you here. Please contact us either by phone or email to schedule an appointment. We will be happy to assist you with any questions you might have.

We are perfectly aware of the speed at which technology is created in Silicon Valley. That’s why our goal is to provide better lead times than our competitors without sacrificing quality. Quite often we’re already working on a project while final design touches are still being added by the engineers.  We wish to provide them with perfect parts and understand that they would like to provide their customers with a perfect design. In this fast paced economy, parts are required the minute they’re designed, which is why we are proud to provide excellent service with rapid turnaround times. Our customers on the East Coast prefer to order from Optima Precision because they know we will deliver faster than their local shop down the street.

 

Materials

ABS – Acrylonitrile butadiene styrene is a plastic that is tough and resistant to impact. It is often used for cased electronic equipment, luggage components, Lego bricks and protective elements. ABS is widely used in 3D printers.

Aluminum – Although the most abundant metal on Earth, due to its chemical reactivity, it rarely manifests in its metallic form. Because it is lightweight, medium strength and resistant to corrosion it is widely used in many different industries.

Alloy 5052 is used mainly for sheet-metal bending purposes.

Alloy 6061 is a definite machinist favorite. Inexpensive, widely available and easy to machine, it is used in our facility in a larger volume than all other metals and plastics combined.

Alloy 2024 contains roughly 4.4% copper and offers the strength of mild steel at one third the weight, but has poor corrosion resistance.

Alloy 7575 was originally developed for the aircraft industry. Very strong and lightweight, it is more resistant to corrosion than 2024 due to its zinc content, which is roughly 6%.

Mic-6 is produced by Alcoa. Due to its stability, it is excellent for maintaining tight tolerances. This cast aluminum has an almost mirror like finish, ideal flatness and protective plastic film. Since it comes in flat sheets, it is usually not necessary to machine its stock thickness and it is ideal for large plate where flatness is crucial. Because of its granular structure, sanding after machining does not produce spectacular surface finishes in the same way that alloy 6061 does.

Brass – A combination of copper and zinc, this yellow metal is used in applications where low friction is required as well as in environments proximate to flammable gases and liquids. Our customers often request the easy to machine brass 360.

Bronze – Combining copper and tin produces a tough brown metal. Machinable grade alloy 936 is commonly used in bearings, bushings and valves.

Copper – This ductile red alloy is known for its high heat and electricity conductivity. Most commonly requested by our customers, oxygen free high conductivity (OFHC) alloy 101, is valued for its purity and homogeneity and is widely used in the semiconductor  industry.

Derlin – Also known as acetal or polyoxymethylene this strong, water resistant thermoplastic offers low friction and dimensional stability for holding tight tolerances.

G10 – Simply fiberglass, it is also known as garolite or FR4, an extremely strong,  dimensionally stable glass fabric laminate. A great electrical insulator, it does not absorb water, and is often used in the production of circuit boards. While some machine shops refuse to work with G10, we are committed to our customers’ needs and will not turn down your business.

Inconel – The most common type of this nickel-chromium and molybdenum superalloy is alloy 625, capable of withstanding extreme temperatures, very strong and high in nickel conent. However, it is extremely difficult to tap and machine; therefore, internal threads are achieved by welding in stainless steel inserts.

Magnesium – A lightweight, flammable metal similar to aluminum, it is often used by the automotive industry and in handheld devices.

Noryl – Another water resistant plastic, often referred to as PPO, and used as an electrical insulator. Ideal for outdoor usage by virtue of its resistance to acid and salt solutions.

PEEK – Applications where high temperatures, moisture, and mechanical wear are factors – medical devices, automotive and aerospace industries – demand this pricey, chemically resistant organic polymer thermoplastic.

PET – Another strong extremely water resistant thermoplastic, often used in the food packing industry.

Polycarbonate – Also known as Lexan, this transparent plastic is widely used in electronic components, medical devices and automotive applications. It can be vapor polished to improve clarity after machining.

Polyethylene – The most common plastic is used extensively in the food packing industry and biotech. Its water resistant property also makes it a preferred choice for tank assembly components.

Polypropylene – One of the lightest plastics, suitable for household goods, laboratory equipment and electronics. More heat resistance than polyethylene, it is favored in the production of reusable, dishwasher friendly food containers.

Polysulfone – This FDA approved, semi transparent, yellowish thermoplastic polymer is a superior choice to polycarbonate where steam sterilization  or other high temperature processes are required. It is commonly found in pharmaceutical and food service applications.

PTFE – Polytetrafluoroethylene, or simply Teflon, is a very slippery, wear resistant synthetic fluoropolymer used in components subjected to high friction. It performs well in high temperatures and has excellent chemical resistance.

PVC – Polyvinyl chloride is used to manufacture pipes and tank assembly connectors.

Stainless Steel – Unlike the name would suggest, it does stain and corrode but very mildly when compared to carbon steel. There are many types of steel; we will mention just the ones we come across most often.

Type 303, is a chromium nickel alloy easier to machine due to its sulfur content than 304 and 316, although some machinist would argue that point.  It is slightly less corrosion resistant that 304, which has very similar properties. It can become magnetic, is not heat treatable nor generally used for welding applications.

Type 304, the most common steel, offers decent weldability and corrosion resistance.

Marine grade Type 316, due to its molybdenum content, is a stronger steel that provides superior corrosion resistance in salt water. Used extensively in marine applications, depending on the sub type, it is also utilized in building reactors and surgical elements.

Type 410 is a wear resistant, heat treatable steel mainly used for fasteners.

Type 440c, a wear resistant and magnetic carbon steel, is the hardest steel when heat treated, making it the best choice for non marine knives.

Type 17-4PH or 630, is strong and moderately corrosion resistant, with applications in the food, aerospace and nuclear waste industries.

Titanium – This corrosion resistant metal is 40% lighter than steel and has an excellent weight to strength ratio. Often used in medical instruments, aerospace and marine applications.

Ultem – or polyetherimide, is an amber colored plastic similar to PEEK but with lower operational temperatures along with a lower cost. Its excellent insulating properties make it the material of choice in circuit breaker housings and semiconductor components.

Vespel – Probably the most expensive material on the list, a 1 inch diameter rod of this ultra high temperature polymide will cost roughly $100 per inch of length. Its heat resistance, dimensional stability, chemical resistance and lubricity make it an ideal material in certain extreme environments in the aerospace and semiconductor industries.

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