{"id":1081,"date":"2026-10-09T02:48:49","date_gmt":"2026-10-09T02:48:49","guid":{"rendered":"https:\/\/sun-gears.net\/sun-gear-failure-modes\/"},"modified":"2026-10-09T06:53:30","modified_gmt":"2026-10-09T06:53:30","slug":"sun-gear-failure-modes","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/zh-cn\/sun-gear-failure-modes\/","title":{"rendered":"Sun Gear Failure Modes: Pitting, Scuffing and Tooth Breakage"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Sun Gear Failure Modes: Pitting, Scuffing and Tooth Breakage<\/h1>\n

Sun gear damage is evidence about the whole planetary stage. Replacing the center gear without finding the cause can lead to repeat failure.<\/p>\n

Technical Guide<\/span>Sun Gear<\/span>Planetary Gear<\/span><\/div>\n
\u7d22\u53d6\u62a5\u4ef7<\/a>Knowledge Center<\/a><\/div>\n<\/div>\n
\"Sun<\/figure>\n<\/div>\n<\/section>\n
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Why this topic changes the sun gear decision<\/h2>\n<\/div>\n
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When the issue is pitting, scuffing and tooth breakage, inspect the entire planetary stage before ordering a single replacement. The sun, planets, ring, bearings, carrier and lubrication system share the same load path.<\/p>\n

Damage pattern, oil condition and circumferential repetition can help distinguish overload, alignment, lubrication and surface-fatigue problems.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Practical design and replacement implications<\/h2>\n<\/div>\n
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A new gear should preserve the approved tooth and interface geometry unless a controlled redesign is intended. Increasing hardness or changing backlash without diagnosing the root cause can create a different failure.<\/p>\n

Record damaged and unworn regions separately when reverse measuring the part.<\/p>\n<\/div>\n

\"Practical<\/figure>\n<\/div>\n<\/div>\n<\/section>\n
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What to control on the RFQ or drawing<\/h2>\n<\/div>\n
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\u7269\u54c1<\/th>\nWhat to define<\/th>\n<\/tr>\n<\/thead>\n
Tooth system<\/td>\nTooth count, module\/DP, pressure angle, helix and profile shift\/modification when applicable.<\/td>\n<\/tr>\n
Planetary context<\/td>\nMating planet\/ring data and planet count when available.<\/td>\n<\/tr>\n
Center interface<\/td>\nBore, keyway, spline, hollow center or integrated shaft plus functional datums.<\/td>\n<\/tr>\n
\u8d23\u4efb<\/td>\nRated\/peak torque, speed, reversals\/shock, life, lubrication and environment.<\/td>\n<\/tr>\n
\u8fc7\u7a0b<\/td>\nControlled material, heat treatment, finishing and coating requirements.<\/td>\n<\/tr>\n
Acceptance<\/td>\nTooth\/runout\/dimensional inspection and required documentation.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/section>\n
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\u5e38\u89c1\u95ee\u9898\u89e3\u7b54<\/h2>\n<\/div>\n
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\nCan one loose sun gear answer every design question?<\/summary>\n

Usually not. Mating gear data and the center interface provide important cross-checks.<\/p>\n<\/details>\n

\nShould material or tolerance be copied from a similar part?<\/summary>\n

Only when the controlled design allows it. Similar appearance is not proof of the same duty or specification.<\/p>\n<\/details>\n

\nWhat is the fastest way to get a useful quote?<\/summary>\n

Send the latest drawing or measured tooth\/interface data, mating component information, duty, acceptance needs and quantity.<\/p>\n<\/details>\n<\/div>\n<\/div>\n<\/section>\n

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\u8be2\u4ef7<\/div>\n

\u7d22\u53d6\u62a5\u4ef7\/\u53d1\u9001\u8be2\u4ef7\u5355<\/h2>\n

Send the drawing, mating gear information, center interface, duty, inspection needs and quantity. The article is selection guidance; the approved drawing controls production.<\/p>\n

\u53d1\u9001\u8be2\u4ef7\u5355<\/a><\/div>\n

\u6700\u5c0f\u8d77\u8ba2\u91cf<\/strong>\u6309\u4ea7\u54c1\u7c7b\u578b\u548c\u8ba2\u5355\u603b\u91d1\u989d\u7075\u6d3b\u8c03\u6574\u3002<\/span><\/div>
\u6837\u54c1<\/strong>\u65b0\u5ba2\u6237\u5728\u96f6\u4ef6\u548c\u5de5\u827a\u5408\u9002\u65f6\u53ef\u4ee5\u8ba2\u8d2d 1-5 \u4ef6\u3002<\/span><\/div>
\u6df7\u5408\u8ba2\u5355<\/strong>\u5f53\u8ba2\u5355\u603b\u989d\u8fbe\u5230 1500 \u7f8e\u5143\u6216\u4ee5\u4e0a\u65f6\uff0c\u53ef\u4ee5\u7ec4\u5408\u4f7f\u7528\u4e0d\u540c\u7684\u592a\u9633\u8f6e\u6216\u76f8\u5173\u884c\u661f\u7ec4\u4ef6\u578b\u53f7\u3002<\/span><\/div>
\u5c0f\u8ba2\u5355<\/strong>1-2 \u4ef6\u7684\u8ba2\u5355\u53ef\u4ee5\u5546\u8bae\uff0c\u4f46\u901a\u5e38\u5355\u4ef7\u4f1a\u66f4\u9ad8\u3002<\/span><\/div>
\u9001\u8d27<\/strong>\u6807\u51c6\u4ef6\uff1a10-25\u4e2a\u5de5\u4f5c\u65e5\u3002\u5b9a\u5236\u7ec4\u4ef6\uff1a20-45\u4e2a\u5de5\u4f5c\u65e5\u3002\u9879\u76ee\u8bbe\u5907\uff1a45-120\u4e2a\u5de5\u4f5c\u65e5\u3002<\/span><\/div>
\u8d38\u6613\u6761\u6b3e<\/strong>EXW\u3001FOB\u3001CIF \u548c DAP \u662f\u5e38\u7528\u7684\u8d38\u6613\u6761\u6b3e\u3002FCA\u3001CFR\u3001CPT\u3001CIP \u548c DDP \u5219\u9700\u5177\u4f53\u60c5\u51b5\u5177\u4f53\u5206\u6790\u3002<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

Sun gear damage is evidence about the whole planetary stage. Replacing the center gear without finding the cause can lead to repeat failure.<\/p>","protected":false},"author":1,"featured_media":1099,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1081","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/posts\/1081","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/comments?post=1081"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/posts\/1081\/revisions"}],"predecessor-version":[{"id":1127,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/posts\/1081\/revisions\/1127"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/media\/1099"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/media?parent=1081"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/categories?post=1081"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/zh-cn\/wp-json\/wp\/v2\/tags?post=1081"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}