{"id":1075,"date":"2026-10-09T02:48:16","date_gmt":"2026-10-09T02:48:16","guid":{"rendered":"https:\/\/sun-gears.net\/sun-gear-runout-concentricity\/"},"modified":"2026-10-09T05:45:07","modified_gmt":"2026-10-09T05:45:07","slug":"sun-gear-runout-concentricity","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/ar\/sun-gear-runout-concentricity\/","title":{"rendered":"Sun Gear Runout and Concentricity: Why Datums Matter"},"content":{"rendered":"
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\u0645\u0639\u0631\u0641\u0629<\/div>\n

Sun Gear Runout and Concentricity: Why Datums Matter<\/h1>\n

Runout only has meaning relative to the surface that defines the operating axis. On a sun gear, that datum may be a bore, spline, shaft or bearing seat.<\/p>\n

\u062f\u0644\u064a\u0644 \u0641\u0646\u064a<\/span>\u0635\u0646 \u062c\u064a\u0631<\/span>\u062a\u0631\u0648\u0633 \u0643\u0648\u0643\u0628\u064a\u0629<\/span><\/div>\n
\u0627\u0637\u0644\u0628 \u0639\u0631\u0636 \u0633\u0639\u0631<\/a>\u0645\u0631\u0643\u0632 \u0627\u0644\u0645\u0639\u0631\u0641\u0629<\/a><\/div>\n<\/div>\n
\"Sun<\/figure>\n<\/div>\n<\/section>\n
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\u0644\u0645\u0627\u0630\u0627 \u064a\u064f\u063a\u064a\u0651\u0631 \u0647\u0630\u0627 \u0627\u0644\u0645\u0648\u0636\u0648\u0639 \u0642\u0631\u0627\u0631 \u0627\u062e\u062a\u064a\u0627\u0631 \u0645\u0639\u062f\u0627\u062a \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u0634\u0645\u0633\u061f<\/h2>\n<\/div>\n
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The useful manufacturing question is how runout, coaxiality and datum control protects the function defined on the drawing. Process names are not quality levels by themselves; the required tooth, runout, hardness and interface results are what matter.<\/p>\n

Heat treatment can move the part, so machining allowance and final datum recovery should be planned before hardening when tight gear, bore or shaft relationships are required.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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\u0627\u0644\u0622\u062b\u0627\u0631 \u0627\u0644\u0639\u0645\u0644\u064a\u0629 \u0644\u0644\u062a\u0635\u0645\u064a\u0645 \u0648\u0627\u0644\u0627\u0633\u062a\u0628\u062f\u0627\u0644<\/h2>\n<\/div>\n
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Inspection should match the acceptance plan. Tooth-size checks, runout, profile\/lead, hardness and dimensional measurements are selected according to the drawing and application rather than applied as a generic bundle.<\/p>\n

If reports or certificates are required, state them at RFQ stage so the manufacturing and sampling plan can include them.<\/p>\n<\/div>\n

\"\u0627\u0644\u0622\u062b\u0627\u0631<\/figure>\n<\/div>\n<\/div>\n<\/section>\n
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\n\n\n\n\n\n\n\n\n\n\n
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\u0627\u0644\u0633\u064a\u0627\u0642 \u0627\u0644\u0643\u0648\u0643\u0628\u064a<\/td>\n\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0643\u0648\u0627\u0643\u0628\/\u0627\u0644\u062d\u0644\u0642\u0627\u062a \u0627\u0644\u0645\u062a\u0632\u0627\u0648\u062c\u0629 \u0648\u0639\u062f\u062f \u0627\u0644\u0643\u0648\u0627\u0643\u0628 \u0639\u0646\u062f \u062a\u0648\u0641\u0631\u0647\u0627.<\/td>\n<\/tr>\n
\u0648\u0627\u062c\u0647\u0629 \u0645\u0631\u0643\u0632\u064a\u0629<\/td>\n\u062b\u0642\u0628\u060c \u0645\u062c\u0631\u0649 \u0645\u0641\u062a\u0627\u062d\u060c \u0648\u0635\u0644\u0629 \u0645\u0633\u0646\u0646\u0629\u060c \u0645\u0631\u0643\u0632 \u0645\u062c\u0648\u0641 \u0623\u0648 \u0639\u0645\u0648\u062f \u0645\u062a\u0643\u0627\u0645\u0644 \u0628\u0627\u0644\u0625\u0636\u0627\u0641\u0629 \u0625\u0644\u0649 \u0628\u064a\u0627\u0646\u0627\u062a \u0648\u0638\u064a\u0641\u064a\u0629.<\/td>\n<\/tr>\n
\u0648\u0627\u062c\u0628<\/td>\n\u0639\u0632\u0645 \u0627\u0644\u062f\u0648\u0631\u0627\u0646 \u0627\u0644\u0645\u0642\u062f\u0631\/\u0627\u0644\u0630\u0631\u0648\u0629\u060c \u0627\u0644\u0633\u0631\u0639\u0629\u060c \u0627\u0644\u0627\u0646\u0639\u0643\u0627\u0633\u0627\u062a\/\u0627\u0644\u0635\u062f\u0645\u0627\u062a\u060c \u0627\u0644\u0639\u0645\u0631 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636\u064a\u060c \u0627\u0644\u062a\u0634\u062d\u064a\u0645 \u0648\u0627\u0644\u0628\u064a\u0626\u0629.<\/td>\n<\/tr>\n
\u0639\u0645\u0644\u064a\u0629<\/td>\n\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0648\u0627\u062f \u0627\u0644\u062e\u0627\u0636\u0639\u0629 \u0644\u0644\u0631\u0642\u0627\u0628\u0629\u060c \u0648\u0627\u0644\u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629\u060c \u0648\u0627\u0644\u062a\u0634\u0637\u064a\u0628\u060c \u0648\u0627\u0644\u0637\u0644\u0627\u0621.<\/td>\n<\/tr>\n
\u0642\u0628\u0648\u0644<\/td>\n\u0641\u062d\u0635 \u0627\u0644\u0623\u0633\u0646\u0627\u0646\/\u0627\u0644\u0627\u0646\u062d\u0631\u0627\u0641\/\u0627\u0644\u0623\u0628\u0639\u0627\u062f \u0648\u0627\u0644\u0648\u062b\u0627\u0626\u0642 \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n
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\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<\/div>\n
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\n\u0647\u0644 \u064a\u0645\u0643\u0646 \u0644\u063a\u0637\u0627\u0621 \u0634\u0645\u0633\u064a \u0648\u0627\u062d\u062f \u0641\u0636\u0641\u0627\u0636 \u0623\u0646 \u064a\u062c\u064a\u0628 \u0639\u0644\u0649 \u0643\u0644 \u0633\u0624\u0627\u0644 \u062a\u0635\u0645\u064a\u0645\u064a\u061f<\/summary>\n

\u0639\u0627\u062f\u0629\u064b \u0644\u0627. \u062a\u0648\u0641\u0631 \u0628\u064a\u0627\u0646\u0627\u062a \u062a\u0631\u0648\u0633 \u0627\u0644\u062a\u0632\u0627\u0648\u062c \u0648\u0627\u0644\u0648\u0627\u062c\u0647\u0629 \u0627\u0644\u0645\u0631\u0643\u0632\u064a\u0629 \u0639\u0645\u0644\u064a\u0627\u062a \u062a\u062d\u0642\u0642 \u0645\u062a\u0628\u0627\u062f\u0644\u0629 \u0645\u0647\u0645\u0629.<\/p>\n<\/details>\n

\n\u0647\u0644 \u064a\u0646\u0628\u063a\u064a \u0646\u0633\u062e \u0627\u0644\u0645\u0627\u062f\u0629 \u0623\u0648 \u0627\u0644\u062a\u0641\u0627\u0648\u062a\u0627\u062a \u0645\u0646 \u062c\u0632\u0621 \u0645\u0645\u0627\u062b\u0644\u061f<\/summary>\n

\u0641\u0642\u0637 \u0639\u0646\u062f\u0645\u0627 \u064a\u0633\u0645\u062d \u0627\u0644\u062a\u0635\u0645\u064a\u0645 \u0627\u0644\u0645\u064f\u062a\u062d\u0643\u0645 \u0628\u0647 \u0628\u0630\u0644\u0643. \u0627\u0644\u0645\u0638\u0647\u0631 \u0627\u0644\u0645\u062a\u0634\u0627\u0628\u0647 \u0644\u064a\u0633 \u062f\u0644\u064a\u0644\u0627\u064b \u0639\u0644\u0649 \u0646\u0641\u0633 \u0627\u0644\u0648\u0638\u064a\u0641\u0629 \u0623\u0648 \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a.<\/p>\n<\/details>\n

\n\u0645\u0627 \u0647\u064a \u0623\u0633\u0631\u0639 \u0637\u0631\u064a\u0642\u0629 \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u0639\u0631\u0636 \u0623\u0633\u0639\u0627\u0631 \u0645\u0641\u064a\u062f\u061f<\/summary>\n

\u0623\u0631\u0633\u0644 \u0623\u062d\u062f\u062b \u0631\u0633\u0645 \u0623\u0648 \u0628\u064a\u0627\u0646\u0627\u062a \u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0646\/\u0627\u0644\u0648\u0627\u062c\u0647\u0629\u060c \u0648\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0639\u0646 \u0645\u0643\u0648\u0646\u0627\u062a \u0627\u0644\u062a\u0632\u0627\u0648\u062c\u060c \u0648\u0627\u0644\u0648\u0627\u062c\u0628\u060c \u0648\u0627\u062d\u062a\u064a\u0627\u062c\u0627\u062a \u0627\u0644\u0642\u0628\u0648\u0644 \u0648\u0627\u0644\u0643\u0645\u064a\u0629.<\/p>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n

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\u0637\u0644\u0628 \u0639\u0631\u0636 \u0623\u0633\u0639\u0627\u0631<\/div>\n

\u0637\u0644\u0628 \u0639\u0631\u0636 \u0633\u0639\u0631 \/ \u0625\u0631\u0633\u0627\u0644 \u0637\u0644\u0628 \u0639\u0631\u0636 \u0633\u0639\u0631<\/h2>\n

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\u0623\u0631\u0633\u0644 \u0637\u0644\u0628 \u0639\u0631\u0636 \u0623\u0633\u0639\u0627\u0631<\/a><\/div>\n

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\u062a\u0648\u0635\u064a\u0644<\/strong>\u0627\u0644\u0623\u062c\u0632\u0627\u0621 \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u0629: \u0645\u0646 10 \u0625\u0644\u0649 25 \u064a\u0648\u0645 \u0639\u0645\u0644. \u0627\u0644\u0645\u0643\u0648\u0646\u0627\u062a \u0627\u0644\u0645\u0635\u0645\u0645\u0629 \u062d\u0633\u0628 \u0627\u0644\u0637\u0644\u0628: \u0645\u0646 20 \u0625\u0644\u0649 45 \u064a\u0648\u0645 \u0639\u0645\u0644. \u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0645\u0634\u0627\u0631\u064a\u0639: \u0645\u0646 45 \u0625\u0644\u0649 120 \u064a\u0648\u0645 \u0639\u0645\u0644.<\/span><\/div>
\u0634\u0631\u0648\u0637 \u0627\u0644\u062a\u062c\u0627\u0631\u0629<\/strong>\u062a\u064f\u062f\u0639\u0645 \u0634\u0631\u0648\u0637 EXW \u0648FOB \u0648CIF \u0648DAP \u0628\u0634\u0643\u0644 \u0634\u0627\u0626\u0639. \u0623\u0645\u0627 \u0634\u0631\u0648\u0637 FCA \u0648CFR \u0648CPT \u0648CIP \u0648DDP \u0641\u064a\u0645\u0643\u0646 \u0645\u0646\u0627\u0642\u0634\u062a\u0647\u0627 \u062d\u0633\u0628 \u0643\u0644 \u062d\u0627\u0644\u0629 \u0639\u0644\u0649 \u062d\u062f\u0629.<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

Runout only has meaning relative to the surface that defines the operating axis. On a sun gear, that datum may be a bore, spline, shaft or bearing seat.<\/p>","protected":false},"author":1,"featured_media":1094,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1075","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/posts\/1075","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/comments?post=1075"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/posts\/1075\/revisions"}],"predecessor-version":[{"id":1121,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/posts\/1075\/revisions\/1121"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/media\/1094"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/media?parent=1075"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/categories?post=1075"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/ar\/wp-json\/wp\/v2\/tags?post=1075"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}