Practical guides for engineers and manufacturing buyers covering CNC RFQ preparation, China CNC supplier selection, confidentiality, NDA, deep holes, thin-wall design, CAD file formats, drawing notes, material certificates, Project Review analysis and quality reports.
Historical Andas prototyping material. Customer names and sensitive details are not shown.
Learn how production-route review catches geometry issues such as thin walls, sharp corners and deep cavities before machining, reducing avoidable prototype rework.
Every missing tolerance or ambiguous feature on your STEP file costs time and money. This checklist covers wall thickness, internal radii, thread specs, draft angles, and the #1 mistake engineers make when exporting from SolidWorks or Fusion 360.
Choosing an unnecessarily tight tolerance class can increase machining cost without improving function. This guide explains when general machining tolerances are enough and when tighter features should be reviewed.
6061-T6 is a common default, while 7075-T6 is useful when strength matters. Compare strength, corrosion resistance, anodizing behavior and machining considerations before choosing a material.
Historical Andas prototyping material. Customer names and sensitive details are not shown.
Andas treats 3-axis CNC as the core route for flexible prototype and small-batch work. 5-axis machining is reviewed by drawing, quantity, tolerance, material and lead time.
That 90° internal corner on your CAD model can create avoidable machining difficulty. Learn why standard CNC tools need internal radii and when alternative processes should be reviewed before quotation.
Historical Andas prototyping material. Customer names and sensitive details are not shown.
Surface finish isn't cosmetic — it affects corrosion resistance, wear life, and assembly fit. Compare 8 common CNC surface treatments with cost per kg, lead time impact, and material compatibility charts.
Historical Andas prototyping material. Customer names and sensitive details are not shown.
For high-mix metal parts, a focused CNC partner usually creates more value than a factory that says it can do everything. Use this checklist to judge response speed, DFM depth and quality control before RFQ.
Choose inspection based on project risk. Basic dimensional checks, inspection photos, CMM, FAIR, MTR or third-party inspection can be arranged by requirement before production starts.
A complete CNC machining RFQ checklist for engineers and buyers: CAD files, PDF drawings, material grade, quantity, tolerances, surface finish, QA documents, NDA requirements and revision control.
Compare STP, STEP, IGES and PDF drawings for CNC machining RFQs. Learn which files engineers should send, when IGES is useful, why PDF drawings still matter, and how to avoid quote delays.
Learn what a Material Test Report (MTR) means for CNC machined parts, when buyers should request material certificates, what data to check, and how MTRs relate to COC, CMM and FAIR documentation.
A practical guide to CNC drawing notes for engineers: material, tolerances, surface finish, deburring, threads, inserts, inspection requirements, coating notes and revision control.
Practical minimum wall thickness guidelines for CNC machined aluminum, steel, stainless steel and plastic parts, with DFM advice for thin walls, ribs, pockets, chatter, deflection and inspection risk.
DFM rules for deep holes and deep pockets in CNC machining, including depth-to-diameter ratio, tool deflection, chip evacuation, coolant access, tolerances and design alternatives.
A practical guide to NDA protection for CNC machining RFQs: what confidential drawing data includes, what a manufacturing NDA should cover, supplier access control, file sharing, retention and secure RFQ workflow.
Historical Andas prototyping material. Customer names and sensitive details are not shown.
A practical checklist for overseas buyers evaluating China CNC machining suppliers: DFM response quality, material control, QA documents, communication, revision control, confidentiality and red flags before ordering.