{"id":1073,"date":"2026-10-09T02:48:06","date_gmt":"2026-10-09T02:48:06","guid":{"rendered":"https:\/\/sun-gears.net\/sun-gear-bore-keyway-spline\/"},"modified":"2026-10-09T05:44:50","modified_gmt":"2026-10-09T05:44:50","slug":"sun-gear-bore-keyway-spline","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/it\/sun-gear-bore-keyway-spline\/","title":{"rendered":"Sun Gear Bore, Keyway or Spline: Interface Choices"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Sun Gear Bore, Keyway or Spline: Interface Choices<\/h1>\n

The center interface determines how torque enters the sun gear and how accurately the part stays on the planetary centerline.<\/p>\n

Technical Guide<\/span>Sun Gear<\/span>Planetary Gear<\/span><\/div>\n
Richiedi un preventivo<\/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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The key engineering question is bore, keyway and spline options. The center interface carries torque and also establishes how the sun gear is located relative to bearings, the carrier and the mating planets.<\/p>\n

A dimensionally correct interface can still produce poor tooth contact if it is eccentric to the external gear teeth. Fits and datums therefore belong in the same review as the gear geometry.<\/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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For replacement work, measure the mating shaft or hub when possible. Service wear can change spline tooth thickness, keyway condition or bore size and should not be copied into the new drawing.<\/p>\n

For new designs, define engagement length, lead-in features, retention and service access along with the torque requirement.<\/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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Articolo<\/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
Dovere<\/td>\nRated\/peak torque, speed, reversals\/shock, life, lubrication and environment.<\/td>\n<\/tr>\n
Processo<\/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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Domande frequenti<\/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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Richiesta di preventivo<\/div>\n

Richiedi un preventivo \/ Invia una richiesta di offerta<\/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

Invia richiesta di preventivo<\/a><\/div>\n

MOQ<\/strong>Flessibilit\u00e0 in base alla tipologia di prodotto e al valore totale dell'ordine.<\/span><\/div>
Campioni<\/strong>I nuovi clienti possono richiedere da 1 a 5 pezzi, a condizione che il componente e il processo siano idonei.<\/span><\/div>
Ordini misti<\/strong>\u00c8 possibile combinare diversi modelli di ingranaggi solari o componenti planetari correlati quando il valore totale dell'ordine \u00e8 pari o superiore a circa 1.500 USD.<\/span><\/div>
Piccoli ordini<\/strong>Ordini da 1 a 2 pezzi sono negoziabili, con un costo unitario generalmente superiore.<\/span><\/div>
Consegna<\/strong>Componenti standard: 10-25 giorni lavorativi. Componenti personalizzati: 20-45 giorni lavorativi. Attrezzature per progetti: 45-120 giorni lavorativi.<\/span><\/div>
termini commerciali<\/strong>I termini EXW, FOB, CIF e DAP sono generalmente supportati. FCA, CFR, CPT, CIP e DDP possono essere discussi caso per caso.<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

The center interface determines how torque enters the sun gear and how accurately the part stays on the planetary centerline.<\/p>","protected":false},"author":1,"featured_media":1100,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1073","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/posts\/1073","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/comments?post=1073"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/posts\/1073\/revisions"}],"predecessor-version":[{"id":1119,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/posts\/1073\/revisions\/1119"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/media\/1100"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/media?parent=1073"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/categories?post=1073"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/it\/wp-json\/wp\/v2\/tags?post=1073"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}