{"id":1486,"date":"2026-04-15T14:46:51","date_gmt":"2026-04-15T14:46:51","guid":{"rendered":"https:\/\/www.atc-mould.com\/?p=1486"},"modified":"2026-04-15T14:46:51","modified_gmt":"2026-04-15T14:46:51","slug":"how-to-design-parts-for-cnc-machining","status":"publish","type":"post","link":"https:\/\/www.atc-mould.com\/?p=1486","title":{"rendered":"How to Design Parts for CNC Machining ?"},"content":{"rendered":"\n<p>Designing parts for CNC machining with a strong Design for Manufacturability (DFM) approach is essential to reduce costs, shorten lead times, and ensure high-quality results. Whether you\u2019re creating custom CNC machined aluminum parts, precision stainless steel components, or rapid prototypes, applying CNC machining DFM guidelines early can save 20-40% on production expenses. This comprehensive DFM guide covers key best practices, including long-tail keywords like \u201cCNC machining design rules for thin walls,\u201d \u201cDFM tips to avoid deep pockets in CNC parts,\u201d and \u201cbest tolerances for CNC machined prototypes.\u201d<br>Key CNC Machining DFM Guidelines:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Simplify Geometry \u2014 Minimize the number of setups and features. Favor 3-axis machining over complex 5-axis whenever possible to lower programming and fixturing costs.<\/li>\n\n\n\n<li>Wall Thickness \u2014 Maintain minimum wall thicknesses: 0.8 mm (0.031&#8243;) for metals like aluminum and 1.5 mm (0.060&#8243;) for plastics. Thinner walls risk vibration, chatter, and breakage during machining.<\/li>\n\n\n\n<li>Internal Radii &amp; Corners \u2014 Avoid sharp internal corners. Add fillets with a minimum radius of 0.5\u20131 mm (or at least 1\/3 of tool diameter) to match standard end mills and reduce stress concentrations.<\/li>\n\n\n\n<li>Pockets &amp; Depths \u2014 Limit pocket depth to 3\u20134 times the width to prevent tool deflection. Use the largest possible tools for faster material removal.<\/li>\n\n\n\n<li>Tolerances \u2014 Apply tight tolerances (\u00b10.02\u20130.05 mm) only to critical mating surfaces. Standard CNC tolerance of \u00b10.1 mm (\u00b10.004&#8243;) keeps costs low for non-functional features.<\/li>\n\n\n\n<li>Undercuts &amp; Threads \u2014 Avoid internal undercuts when possible, as they require special tooling. Use standard hole sizes and thread specifications for easy machining.<br>At ATC-MOULD, our expert engineers provide free DFM analysis with every quote, helping you optimize designs for CNC aluminum anodizing, powder coating, or other post-machining finishes. Whether you need low-volume prototypes or production runs, our ISO-certified CNC machining services deliver precision parts faster and more affordably.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Designing parts for CNC machining with a strong Design for Manufacturability (DFM) approach is essential to reduce costs, shorten lead times, and ensure high-quality results. Whether you\u2019re creating custom CNC machined aluminum parts, precision stainless steel components, or rapid prototypes, applying CNC machining DFM guidelines early can save 20-40% on production expenses. This comprehensive DFM [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1487,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1486","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/posts\/1486","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1486"}],"version-history":[{"count":1,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/posts\/1486\/revisions"}],"predecessor-version":[{"id":1488,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/posts\/1486\/revisions\/1488"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=\/wp\/v2\/media\/1487"}],"wp:attachment":[{"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.atc-mould.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}