CNC Machining Knowledge Center
Choose a CNC machining resource for the question in front of you: verify a supplier, prepare an inquiry, develop a drawing, choose a material or agree inspection.
Why these guides matter
Verifying a supplier? Start with machining capabilities, manufacturing relationship and authorization, and inspection scope and records.
Ready to inquire? Use the CNC purchasing and quote FAQ for preparation questions or Request a Quote with the information available.
Developing the specification? Use CAD and drawing preparation, the CNC material selection guide, functional tolerances and GD&T, and surface finishes and fit allowances. The guides help define requirements; the quotation and confirmed drawing establish the project scope.
Explore by topic
CNC overview
Subtractive process, CAD-to-delivery workflow, and when to choose milling, turning, multi-axis, or EDM.
Design guidelines
Check tool access, walls, holes, and fillets, then prepare CAD and drawings for a manufacturability review.
Materials guide
Choose a material grade and condition from functional requirements, then compare aluminum, steel, copper alloys and engineering plastics.
Precision & tolerance standards
Distinguish general tolerances from critical dimensions, specify datums and GD&T, and understand which limits need DFM confirmation.
Surface finishes
Anodizing, blast, passivation, powder coat, plating, and dimensional impact on fits.
Quality control & inspection
Connect drawing features to inspection methods, coverage and the records agreed for an order.
CNC machining FAQ
Resolve inquiry preparation, upload formats, order quantities and schedule-confirmation questions.
Capabilities overview
Compare CNC machining capabilities, equipment envelopes, and process coordination to assess fit for a multi-process part.
Choose a guide by question
I need to verify the supplier
Check the contracting entity, written manufacturing relationship and responsibility before discussing an order.
I have a part and need a quote
Submit a project summary and your contact details. Add CAD, a drawing or technical requirements when available.
I need to prepare CAD and a drawing
Check cutting and fixture access, holes, threads, revision and functional features for DFM.
I need to choose a material
Connect load, environment and dimensional needs to a grade, condition and supply specification.
I need to define tolerances
Distinguish individual and general requirements, functional datum relationships and final acceptance state.
I need to specify a finish
Define the process, appearance, masking and which dimensions must be checked after finishing.
I need inspection and records
Identify the drawing revision, named characteristics, inspection coverage and reports that receiving inspection must match to the order.
Need a DFM review with your quote?
Send the available part information and identify open questions. Requirements are reviewed before a quotation and order confirmation.