Buyer's Guides

Rapid prototyping with CNC machining turns a CAD file into a functional, production-grade part in days. This 2026 guide covers the CAD-to-part workflow, CNC vs 3D printing trade-offs, tolerances, costs, and how SOMI Custom Parts accelerates your prototyping.

A complete guide to CNC machining brass and copper alloys, covering grades such as C360 and C110, machinability ratings, cutting parameters, tolerances, design rules, surface finishing, and applications across electrical, fluid, thermal, and medical industries.

CNC machining vs injection molding: a data-driven guide to choosing the right manufacturing process for your project. Compare cost, tolerances, lead times, materials, and break-even volumes, then learn when to use CNC machining, when to switch to injection molding, and how SOMI Custom Parts can help you decide.

Learn what custom non-standard parts manufacturing is, how it differs from standard parts, and when it is worth the investment. Discover the CNC machining process, key benefits, cost and lead time factors, and how SOMI Custom Parts delivers drawing-controlled precision parts.

Choosing between metal and plastic for CNC machining is one of the most important decisions in custom parts manufacturing. This guide compares strength, heat resistance, weight, corrosion, cost, and machinability of common metals and engineering plastics, and provides a practical three-step framework to select the right material for your application.

Learn how to specify O-ring grooves, keyways, and dowel pin holes on CNC drawings — including ISO 3601 and ANSI B17.1 standards, tolerance tables, machining methods, and specification mistakes to avoid for precision machined parts.

Learn how to design press-fit and slip-fit features for precision CNC machined parts. This guide covers ISO 286 fit tolerances, interference values by material, machining methods, surface finish and coating effects, plus common failure modes so your assemblies mate reliably first time.

Learn how to design threads and tapped holes for CNC machining: engagement depth rules, blind hole clearance, tolerance classes like 6H and 2B, tapping vs thread milling, and inspection with go/no-go gauges.

Master the three design rules that control CNC machining cost and quality: pocket depth ratios, minimum wall thicknesses, and internal corner radii. This practical guide from SOMI Custom Parts covers every limit with real numbers, comparison tables, and redesign case studies.

Master 10 DFM design rules for CNC machining to cut production costs, avoid geometry flaws, simplify machining and boost finished part consistency & quality.

Learn how to evaluate CNC machining quality via 3-stage inspection, precision metrology tools & ISO/AS9100 certifications, plus essential FAIR & material test documentation for reliable suppliers.

Compare onshore vs offshore CNC machining in 2026 with real cost data, lead time analysis, and quality trade-offs. Learn how to make the right sourcing decision for your precision custom parts with SOMI Custom Parts.

A comprehensive comparison of CNC rapid prototyping versus production machining. Learn when to use each approach, cost crossover analysis, quality differences, and how to transition from prototype to full production with confidence.

Learn exactly what to include in your RFQ for custom CNC machined parts — and what common mistakes to avoid. This complete guide covers 3D models, 2D drawings, GD&T, material specifications, surface finishes, tolerances, and inspection requirements to help you get accurate CNC machining quotes faster and at lower cost.