{"id":1079,"date":"2026-10-09T02:48:38","date_gmt":"2026-10-09T02:48:38","guid":{"rendered":"https:\/\/sun-gears.net\/planet-count-sun-gear-geometry\/"},"modified":"2026-10-09T06:53:23","modified_gmt":"2026-10-09T06:53:23","slug":"planet-count-sun-gear-geometry","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/fa\/planet-count-sun-gear-geometry\/","title":{"rendered":"How Planet Count Affects Sun Gear and Planetary Geometry"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

How Planet Count Affects Sun Gear and Planetary Geometry<\/h1>\n

Planet count changes load sharing, carrier layout and assembly conditions, so it belongs in a serious planetary gear review.<\/p>\n

Technical Guide<\/span>Sun Gear<\/span>Planetary Gear<\/span><\/div>\n
Request a Quote<\/a>Knowledge Center<\/a><\/div>\n<\/div>\n
\"How<\/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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The first step is to define planet count and assembly conditions in the context of the complete planetary stage. Sun, planet and ring gear tooth data share one center-distance relationship, and the number of planets can add assembly constraints.<\/p>\n

Changing one sun-gear variable can alter ratio, contact, packaging or the mating gear requirements. Preserve the controlled calculation for replacement work and use a system-level review for new designs.<\/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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Start with tooth count, module or DP, pressure angle, helix information and any specified profile shift. Then add planet and ring tooth counts and the number of planets.<\/p>\n

The center connection\u2014bore, key, spline, hollow center or integrated shaft\u2014should be defined after the mesh is understood, not treated as a separate cosmetic feature.<\/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
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
Duty<\/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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\u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0627\u0633\u062a\u0639\u0644\u0627\u0645 (RFQ)<\/div>\n

\u062f\u0631\u062e\u0648\u0627\u0633\u062a \u0642\u06cc\u0645\u062a \/ \u0627\u0631\u0633\u0627\u0644 RFQ<\/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

Send RFQ<\/a><\/div>\n

\u062d\u062f\u0627\u0642\u0644 \u0633\u0641\u0627\u0631\u0634<\/strong>\u0627\u0646\u0639\u0637\u0627\u0641\u200c\u067e\u0630\u06cc\u0631 \u0628\u0631 \u0627\u0633\u0627\u0633 \u0646\u0648\u0639 \u0645\u062d\u0635\u0648\u0644 \u0648 \u0627\u0631\u0632\u0634 \u06a9\u0644 \u0633\u0641\u0627\u0631\u0634.<\/span><\/div>
\u0646\u0645\u0648\u0646\u0647\u200c\u0647\u0627<\/strong>New customers may request 1-5 pieces when the part and process are suitable.<\/span><\/div>
\u0633\u0641\u0627\u0631\u0634\u0627\u062a \u0645\u062e\u062a\u0644\u0637<\/strong>Different sun gear or related planetary-component models can be combined when the total order value is around USD 1,500 or above.<\/span><\/div>
\u0633\u0641\u0627\u0631\u0634\u200c\u0647\u0627\u06cc \u06a9\u0648\u0686\u06a9<\/strong>Orders from 1-2 pieces can be discussed, normally with a higher unit cost.<\/span><\/div>
\u062a\u062d\u0648\u06cc\u0644<\/strong>Standard parts: 10-25 working days. Custom components: 20-45 working days. Project equipment: 45-120 working days.<\/span><\/div>
\u0634\u0631\u0627\u06cc\u0637 \u062a\u062c\u0627\u0631\u062a<\/strong>EXW\u060c FOB\u060c CIF \u0648 DAP \u0645\u0639\u0645\u0648\u0644\u0627\u064b \u067e\u0634\u062a\u06cc\u0628\u0627\u0646\u06cc \u0645\u06cc\u200c\u0634\u0648\u0646\u062f. FCA\u060c CFR\u060c CPT\u060c CIP \u0648 DDP \u0631\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0645\u0648\u0631\u062f \u0628\u0647 \u0645\u0648\u0631\u062f \u0645\u0648\u0631\u062f \u0628\u062d\u062b \u0642\u0631\u0627\u0631 \u062f\u0627\u062f.<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

Planet count changes load sharing, carrier layout and assembly conditions, so it belongs in a serious planetary gear review.<\/p>","protected":false},"author":1,"featured_media":1097,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1079","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/posts\/1079","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/comments?post=1079"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/posts\/1079\/revisions"}],"predecessor-version":[{"id":1125,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/posts\/1079\/revisions\/1125"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/media\/1097"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/media?parent=1079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/categories?post=1079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/fa\/wp-json\/wp\/v2\/tags?post=1079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}