Precision CNC Machining for Functional Prototypes and End-use Parts

You know us as the fastest manufacturing supplier of machined parts, but sometimes your project requirements outweigh the need for speed. We machine highly precise parts with multiple finishing and reporting options—just what you need for parts with high-end specifications. 

Precision machining makes sense when you need lower quantities with higher part requirements. Lead times still can be as few as 5 days! 

Advantages of Precision Machining

Machining complexity often brings with it high-level requirements, requirements where additional documentation like 2D drawings are necessary. To ensure that your parts meet your needs, we accept 2D drawings and include design feedback from applications engineers. You'll also get: 

• Tolerances as tight as +/-0.002 in. (0.0508mm)
• Tolerances adhere to ISO 2768*
• Fulfillment of quality requirements (including CoC, FAI, ISO 9001, and AS9100)
• Fully machined features (no material left behind) 

*For parts being manufactured through our network of manufacturing partners, we guarantee ISO 2768 standards for all CNC machined parts. Metal parts will follow ISO 2768-m (medium) or ISO 2768-f (fine). Plastic parts will follow ISO 2768-m (medium). Tolerances down to +/- 0.0004 in. (0.010 mm) are possible but must be clearly indicated in 2D drawings. 

Design Guidelines for Precision Machining

Maximum Dimensions

Minimum Dimensions

Materials for Precision CNC Machining

• Metals
• Plastics

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Aluminum Copper Brass Bronze Steel Tool Steel

Stainless Steel Titanium Mild Steel (sourced through network) Inconel (sourced through network) Invar (sourced through network)

*Additional materials are available based on vendor inventory or by request, but quotes can take up to 48 hours.
*Materials softer than 50 Shore D and harder than HRC 32 not offered

ABS Acetal Acrylic CPVC Delrin Delrin AF PTFE HDPE Nylon PEEK  PEI (Ultem)

PET Polycarbonate PVC UHMW PPSU (sourced through network) PMMA/acrylic (sourced through network) Polypropylene (sourced through network) G-10 (sourced through network)  FR4 (sourced through network)

*Additional materials are available based on vendor inventory or by request, but quotes can take up to 48 hours.
*Materials softer than 50 Shore D and harder than HRC 32 not offered

Geometry Limitations 

• Knife edges
• Parts drafted on both internal and external walls
• 5-axis parts with cavity depth exceeding 6 in.

Text

Recommended text considerations for CNC milling:

•  Minimum width of 0.007 in. (0.177mm), depth of 0.012 in. (0.309mm). 
• If design permits it, opt for recessed text versus raised.

Quality Documentation

• Certificate of Conformance (CoC) to customer specifications
• First Article Inspections (FAIs)
• Material certification and heat lot numbers
• AS9100
• ISO 9001

Finishing and Post-Processing

Learn more about post-processing options.

Threading Options

*We support any standard outside diameter UNC, UNF, and metric thread up to 2-3 in. ACME, Whitworth, Bottle Cap, British Standard thread not supported. Gauges required for special operations will add lead time to quote. Blunt start threads not supported.