Specialty Precision Machining

Specialty Precision Machining is a build-to-print CNC job shop in Stockton, operating since 1991. Its owner says he learned the trade in Silicon Valley over more than 40 years of machining.

Capabilities

• CNC milling and turning to +/-0.0002 in. tolerance
• High-speed and 3D machining
• 4th-axis milling
• Solid modeling and blueprint documentation
• Laser part marking and engraving
• First article inspection and certificate of conformance
• Prototype through production

Equipment

• CNC lathes: Doosan Lynx 2100LYA, Haas SL20, Haas ST20
• CNC mills: Haas VF-2, VF-2SSYT, VF-4SS with 4th axis; Haas HR210 rotary table
• CNC Automation MX3 knee mill
• Victor 16 x 40 engine lathe; Tsugami chucker
• M2 Fusion 32 dual-source laser
• Software: Surfcam, GibbsCAM, SolidCAM, SolidWorks

Materials

Stainless steel, Hastelloy C-276, Inconel, aluminum, brass, copper, nickel aluminum bronze (C630), Nitronic 60 and plastics including Celazole, Torlon, Teflon, Delrin and PEEK.

Industries served

Petroleum, electronics, silicon wafer manufacturing, robotics, food processing, marine, medical and semiconductor.

Quality & certifications

• Mil-I-45208A and Mil-Q-9858A certified (as stated on site)
• ISO 9001:2015 compliant

Request a quote

To request a quote from this shop, use the Request a Quote form. Tell us the part, material, quantity and deadline, and we will pass your request to the shop.

Build to Print CNC Work in Stockton: Specialty Precision Machining

Build to print means a customer supplies the drawing and the shop makes the part exactly as drawn. The shop does not redesign anything. For a buyer, this is the cleanest way to work when the design is finished. Specialty Precision Machining is listed here in Stockton for CNC milling, CNC turning, grinding, prototyping, production machining, first article inspection and laser marking. This page explains what each of those terms means when you are preparing a request.

What a good print contains

A print is more than a picture. It states the material, every dimension, the tolerance on each dimension, the surface finish and any notes about coatings or marking. A shop quotes from the print, so gaps in it become questions, and questions add days. Before you send a print, check that every dimension is clear and that the revision letter is current.

Tolerance and cost

A tolerance is the allowed variation in a dimension. Tighter tolerances take slower cuts, more careful setups and more inspection. The cost curve is steep, which is why a good habit is to hold tight tolerances only on the features that need them. Everything else can use a standard tolerance.

First article inspection

A first article inspection is a formal check of the first part made from a new order or a new revision. Each dimension on the print is measured and recorded, and the report is kept as proof that the setup produces a correct part. Many industries ask for it. If you need one, say so when you ask for a quote, since it adds time.

Hard materials and plastics

Exotic alloys can be tough on cutting tools and slow to machine. Plastics can be soft, can move with heat and can be hard to hold. Either one changes the price and the schedule, so name the exact material in your request instead of a general description.

Marking and traceability

Laser marking puts serial numbers, part numbers or logos on a finished part. Parts for medical or semiconductor uses are often marked so they can be traced. If your part needs marking, include the text, the size and the location.

What to send

• Print as a PDF, plus a 3D model if you have one
• Material, with grade and any certification you need
• Quantity and delivery date
• Inspection requirements, such as first article reports
• Marking or packaging instructions

Prototype first or go straight to production

Some buyers order a small prototype lot to confirm fit, then release a production order. Others skip that step when the design has been used before. If you plan to do both, mention it, because the first run can then be set up with the second in mind. Buyers in Stockton can also ask whether the same drawing can be quoted at more than one quantity, which shows how the price changes.

Have a print ready? Send it with the details through the Request a Quote form and we will share your request with the shop.

Is this your shop? Claim or remove this listing.