{"id":1082,"date":"2026-10-09T02:48:50","date_gmt":"2026-10-09T02:48:50","guid":{"rendered":"https:\/\/sun-gears.net\/lubrication-sun-gears-planetary\/"},"modified":"2026-10-09T06:53:31","modified_gmt":"2026-10-09T06:53:31","slug":"lubrication-sun-gears-planetary","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/uk\/lubrication-sun-gears-planetary\/","title":{"rendered":"Lubrication Factors for Sun Gears in Planetary Gearboxes"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Lubrication Factors for Sun Gears in Planetary Gearboxes<\/h1>\n

Lubrication protects tooth surfaces, removes heat and carries contamination away; sun-gear speed and stage orientation affect how that oil reaches the mesh.<\/p>\n

Technical Guide<\/span>\u0421\u043e\u043d\u044f\u0447\u043d\u0435 \u0441\u043f\u043e\u0440\u044f\u0434\u0436\u0435\u043d\u043d\u044f<\/span>Planetary Gear<\/span><\/div>\n
\u0417\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u043e\u0457 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0457<\/a>Knowledge Center<\/a><\/div>\n<\/div>\n
\"Lubrication<\/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 lubrication and oil condition, 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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Item<\/th>\nWhat to define<\/th>\n<\/tr>\n<\/thead>\n
\u0417\u0443\u0431\u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430<\/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
\u041e\u0431\u043e\u0432'\u044f\u0437\u043e\u043a<\/td>\nRated\/peak torque, speed, reversals\/shock, life, lubrication and environment.<\/td>\n<\/tr>\n
Process<\/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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Frequently asked questions<\/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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\u0417\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u0438\u0445 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0439<\/div>\n

\u0417\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u043e\u0457 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0457 \/ \u041d\u0430\u0434\u0456\u0441\u043b\u0430\u0442\u0438 \u0437\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u043e\u0457 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0457<\/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

\u041d\u0430\u0434\u0456\u0441\u043b\u0430\u0442\u0438 \u0437\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u043e\u0457 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0457<\/a><\/div>\n

\u041c\u0456\u043d\u0456\u043c\u0430\u043b\u044c\u043d\u0430 \u043a\u0456\u043b\u044c\u043a\u0456\u0441\u0442\u044c \u0437\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f<\/strong>\u0413\u043d\u0443\u0447\u043a\u0438\u0439 \u0432\u0438\u0431\u0456\u0440 \u0437\u0430\u043b\u0435\u0436\u043d\u043e \u0432\u0456\u0434 \u0442\u0438\u043f\u0443 \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0443 \u0442\u0430 \u0437\u0430\u0433\u0430\u043b\u044c\u043d\u043e\u0457 \u0432\u0430\u0440\u0442\u043e\u0441\u0442\u0456 \u0437\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f.<\/span><\/div>
\u0417\u0440\u0430\u0437\u043a\u0438<\/strong>\u041d\u043e\u0432\u0456 \u043a\u043b\u0456\u0454\u043d\u0442\u0438 \u043c\u043e\u0436\u0443\u0442\u044c \u0437\u0430\u043c\u043e\u0432\u0438\u0442\u0438 \u0432\u0456\u0434 1 \u0434\u043e 5 \u0448\u0442\u0443\u043a, \u044f\u043a\u0449\u043e \u0434\u0435\u0442\u0430\u043b\u044c \u0442\u0430 \u043f\u0440\u043e\u0446\u0435\u0441 \u043f\u0456\u0434\u0445\u043e\u0434\u044f\u0442\u044c.<\/span><\/div>
\u0417\u043c\u0456\u0448\u0430\u043d\u0456 \u0437\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f<\/strong>\u0420\u0456\u0437\u043d\u0456 \u043c\u043e\u0434\u0435\u043b\u0456 \u0441\u043e\u043d\u044f\u0447\u043d\u0438\u0445 \u0448\u0435\u0441\u0442\u0435\u0440\u0435\u043d\u044c \u0430\u0431\u043e \u043f\u043e\u0432'\u044f\u0437\u0430\u043d\u0438\u0445 \u0437 \u043d\u0438\u043c\u0438 \u043f\u043b\u0430\u043d\u0435\u0442\u0430\u0440\u043d\u0438\u0445 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0456\u0432 \u043c\u043e\u0436\u043d\u0430 \u043a\u043e\u043c\u0431\u0456\u043d\u0443\u0432\u0430\u0442\u0438, \u044f\u043a\u0449\u043e \u0437\u0430\u0433\u0430\u043b\u044c\u043d\u0430 \u0432\u0430\u0440\u0442\u0456\u0441\u0442\u044c \u0437\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f \u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0431\u043b\u0438\u0437\u044c\u043a\u043e 1500 \u0434\u043e\u043b\u0430\u0440\u0456\u0432 \u0421\u0428\u0410 \u0430\u0431\u043e \u0431\u0456\u043b\u044c\u0448\u0435.<\/span><\/div>
\u041d\u0435\u0432\u0435\u043b\u0438\u043a\u0456 \u0437\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f<\/strong>\u0417\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f \u0432\u0456\u0434 1-2 \u0448\u0442\u0443\u043a \u043c\u043e\u0436\u0443\u0442\u044c \u043e\u0431\u0433\u043e\u0432\u043e\u0440\u044e\u0432\u0430\u0442\u0438\u0441\u044f, \u0437\u0430\u0437\u0432\u0438\u0447\u0430\u0439 \u0437 \u0432\u0438\u0449\u043e\u044e \u0432\u0430\u0440\u0442\u0456\u0441\u0442\u044e \u0437\u0430 \u043e\u0434\u0438\u043d\u0438\u0446\u044e.<\/span><\/div>
\u0414\u043e\u0441\u0442\u0430\u0432\u043a\u0430<\/strong>\u0421\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u0456 \u0434\u0435\u0442\u0430\u043b\u0456: 10-25 \u0440\u043e\u0431\u043e\u0447\u0438\u0445 \u0434\u043d\u0456\u0432. \u041a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0438 \u043d\u0430 \u0437\u0430\u043c\u043e\u0432\u043b\u0435\u043d\u043d\u044f: 20-45 \u0440\u043e\u0431\u043e\u0447\u0438\u0445 \u0434\u043d\u0456\u0432. \u041f\u0440\u043e\u0435\u043a\u0442\u043d\u0435 \u043e\u0431\u043b\u0430\u0434\u043d\u0430\u043d\u043d\u044f: 45-120 \u0440\u043e\u0431\u043e\u0447\u0438\u0445 \u0434\u043d\u0456\u0432.<\/span><\/div>
\u0422\u043e\u0440\u0433\u043e\u0432\u0435\u043b\u044c\u043d\u0456 \u0443\u043c\u043e\u0432\u0438<\/strong>\u0417\u0430\u0437\u0432\u0438\u0447\u0430\u0439 \u043f\u0456\u0434\u0442\u0440\u0438\u043c\u0443\u044e\u0442\u044c\u0441\u044f \u0443\u043c\u043e\u0432\u0438 EXW, FOB, CIF \u0442\u0430 DAP. \u0423\u043c\u043e\u0432\u0438 FCA, CFR, CPT, CIP \u0442\u0430 DDP \u043c\u043e\u0436\u0443\u0442\u044c \u043e\u0431\u0433\u043e\u0432\u043e\u0440\u044e\u0432\u0430\u0442\u0438\u0441\u044f \u0432 \u043a\u043e\u0436\u043d\u043e\u043c\u0443 \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u043e\u043c\u0443 \u0432\u0438\u043f\u0430\u0434\u043a\u0443.<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

Lubrication protects tooth surfaces, removes heat and carries contamination away; sun-gear speed and stage orientation affect how that oil reaches the mesh.<\/p>","protected":false},"author":1,"featured_media":1093,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1082","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/posts\/1082","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/comments?post=1082"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/posts\/1082\/revisions"}],"predecessor-version":[{"id":1128,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/posts\/1082\/revisions\/1128"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/media\/1093"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/media?parent=1082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/categories?post=1082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/tags?post=1082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}