{"id":685,"date":"2026-10-03T17:39:09","date_gmt":"2026-10-03T09:39:09","guid":{"rendered":"https:\/\/www.ypmfg.com\/2026\/10\/03\/cnc-speeds-and-feeds-explained\/"},"modified":"2026-10-03T17:39:09","modified_gmt":"2026-10-03T09:39:09","slug":"cnc-speeds-and-feeds-explained","status":"publish","type":"post","link":"https:\/\/www.ypmfg.com\/ja\/2026\/10\/03\/cnc-speeds-and-feeds-explained\/","title":{"rendered":"CNC Speeds and Feeds Explained"},"content":{"rendered":"
\n

\u7c21\u5358\u306a\u7b54\u3048\uff1a<\/strong><\/p>\n

CNC speeds and feeds are the two parameters that control how a cutting tool removes material. Speed (RPM) sets the spindle rotation rate. Feed rate (mm\/min or in\/min) sets how fast the tool advances. Getting both right determines cutting speed<\/strong>, surface finish, tool life, and part accuracy. Too high risks breakage; too low inflates cycle time. Correct values depend on material, tool diameter, and CNC machining parameters<\/strong> specific to your operation.<\/p>\n

Most machinists and buyers face the same question: what settings will produce a clean part without snapping the tool? YPMFG<\/strong> supports manufacturers who need these values locked in before the first job, not after expensive rework.<\/p>\n

What CNC Speeds and Feeds Actually Mean<\/h2>\n

Spindle speed (S) and feed rate (F) are not interchangeable. S is rotational velocity in RPM. F is the linear travel distance per minute.<\/p>\n

Together they define the material removal rate<\/strong> for each pass. You select S from the recommended cutting speed for your material-tool pair. F is then calculated from S, feed per tooth,and flute count.<\/p>\n

In practice, both values interact with machine rigidity, tool geometry, and coolant strategy. Changing one without adjusting the other shifts the entire cutting condition.<\/p>\n

\"cnc<\/p>\n

Key Factors That Affect Speed and Feed Selection<\/h2>\n

Start with the material datasheet. Manufacturers publish recommended cutting speeds (Vc) for each alloy. Convert Vc to RPM with S = (Vc \u00d7 1000) \/ (\u03c0 \u00d7 D), where D is tool diameter in mm.<\/p>\n

From there, feed per tooth (fz) and flute count (Z) give you F = S \u00d7 fz \u00d7 Z.<\/p>\n\n\n\n\n\n\n\n
\u56e0\u5b50<\/th>\nEffect on Speed<\/th>\nEffect on Feed<\/th>\n<\/tr>\n
Material hardness<\/td>\nLower speed for harder alloys<\/td>\nReduced feed to limit deflection<\/td>\n<\/tr>\n
Tool diameter<\/td>\nSmaller diameter allows higher RPM<\/td>\nSmaller tool supports lower fz<\/td>\n<\/tr>\n
Depth of cut<\/td>\nUsually no speed change<\/td>\nFeed must drop for heavy passes<\/td>\n<\/tr>\n
Coolant type<\/td>\nDry\/MQL often needs lower speed<\/td>\nLubrication shifts allowable fz<\/td>\n<\/tr>\n
\u6a5f\u68b0\u306e\u525b\u6027<\/td>\nStiff setups tolerate higher values<\/td>\nRigid machines support heavier feeds<\/td>\n<\/tr>\n<\/table>\n

Always verify parameters against your specific machine. A high-speed spindle does not mean you should run at maximum RPM for every operation.<\/p>\n

After selecting values, check your feed rate calculation<\/strong> against the controller’s maximum feed override. Exceeding it forces the spindle to slow down and ruins the intended cutting condition.<\/p>\n

Common Mistakes That Cost Time and Money<\/h2>\n

The most frequent error is copying chart values without adjusting for actual tool geometry. A 10 mm carbide end mill and a 10 mm HSS mill need very different settings.<\/p>\n

\"cnc<\/p>\n

Another risk is running too slow. Low spindle speed raises chip load per tooth, causing built-up edge and poor finish. The part may look acceptable but develops micro-scale stress risers.<\/p>\n

Tool wear<\/strong> accelerates quickly when parameters drift outside the optimal window. A 5% feed increase beyond recommendation can halve tool life on hardened steels.<\/p>\n

If you are ordering \u7279\u6ce8CNC\u90e8\u54c1<\/strong> or a CNC\u90e8\u54c1\u306e\u88fd\u9020<\/strong> run, sending your intended speed and feed values to your supplier helps them flag issues early. YPMFG<\/strong> can review your parameters during \u6280\u8853\u30ec\u30d3\u30e5\u30fc<\/strong> and suggest adjustments matched to your material and setup.<\/p>\n

\u8cfc\u5165\u8005\u304b\u3089\u3088\u304f\u5bc4\u305b\u3089\u308c\u308b\u8cea\u554f<\/h2>\n

What is the typical spindle speed range for aluminum?<\/strong><\/p>\n

Most aluminum milling and turning operations run between 8,000 and 15,000 RPM, depending on tool diameter and depth of cut. Harder alloys like 7075 may need slightly lower speeds.<\/p>\n

How do I know if my feed rate is too high?<\/strong><\/p>\n

Watch for excessive tool deflection, chip clogging, and surface degradation. If chips become long and continuous instead of short curls, the feed is likely too aggressive for the material.<\/p>\n

Do speeds and feeds change between dry and wet cutting?<\/strong><\/p>\n

Yes. Dry or MQL cutting often requires 10\u201320% lower spindle speed and reduced feed to compensate for less lubrication. Full flood coolant allows slightly more aggressive parameters.<\/p>\n

Can I use the same settings for a prototype and a 500-piece run?<\/strong><\/p>\n

Not always. Prototypes typically run conservative values to verify geometry. Production setups optimize for material removal rate<\/strong>, which may push parameters toward the upper end of the recommended range for cycle-time savings.<\/p>\n

Need Help Dialing In Your Parameters?<\/h2>\n

\u53f3 CNC speeds and feeds<\/strong> for your job depend on material, tool, machine rigidity, and tolerance requirements. Getting them wrong on the first pass costs hours of rework or scrapped parts.<\/p>\n

Send your part drawings, material spec, and intended tool list to YPMFG<\/strong>. Our team reviews your speed and feed selections, flags risks, and recommends adjustments before you cut steel. You will receive a practical recommendation within one business day.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Quick answer:CNC speeds and feeds are the two parameters that control how a cutting tool<\/p>","protected":false},"author":1,"featured_media":686,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[551,552,456,553,554],"class_list":["post-685","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cnc-speeds","tag-feeds-calculation","tag-machining-parameters","tag-material-removal-rate","tag-tool-life"],"yoast_head":"\nCNC Speeds and Feeds Explained<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ypmfg.com\/ja\/2026\/10\/03\/cnc-speeds-and-feeds-explained\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CNC Speeds and Feeds 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