{"id":687,"date":"2026-10-08T07:37:27","date_gmt":"2026-10-08T07:37:27","guid":{"rendered":"https:\/\/sun-gears.net\/gear-rack-installation-alignment-joining\/"},"modified":"2026-10-09T05:43:50","modified_gmt":"2026-10-09T05:43:50","slug":"splined-sun-gear-interface","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/uk\/splined-sun-gear-interface\/","title":{"rendered":"Splined Sun Gear Interfaces: What to Measure"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Splined Sun Gear Interfaces: What to Measure<\/h1>\n

The spline can be as important as the gear teeth. A correct sun gear must both mesh with the planets and fit the drive shaft or hub.<\/p>\n

Technical Guide<\/span>Planetary Gear<\/span>\u0417\u0430\u043f\u0438\u0442 \u0446\u0456\u043d\u043e\u0432\u0438\u0445 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u0439<\/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>\u041f\u0435\u0440\u0435\u0433\u043b\u044f\u043d\u0443\u0442\u0438 \u0442\u043e\u0432\u0430\u0440\u0438<\/a><\/div>\n<\/div>\n
\"Splined<\/figure>\n<\/div>\n<\/section>\n
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Spline identity<\/h2>\n<\/div>\n

State the governing spline standard or provide a complete tooth definition, not only the major diameter.<\/p>\n<\/div>\n<\/section>\n

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Fit and datum<\/h2>\n<\/div>\n

Spline fit, effective length, runout to the gear teeth and axial shoulder locations influence assembly.<\/p>\n<\/div>\n<\/section>\n

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\u0406\u043d\u0441\u043f\u0435\u043a\u0446\u0456\u044f<\/h2>\n<\/div>\n

Define whether spline gauges, over-pin measurements or runout reports are required.<\/p>\n<\/div>\n<\/section>\n

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Use the drawing as the controlled record<\/h2>\n<\/div>\n
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A technical guide can explain which variables matter, but the final sun gear must be approved from the actual drawing and operating requirement.<\/p>\n

If a value is missing, identify it for confirmation instead of copying a dimension or material from a different supplier or gear family.<\/p>\n<\/div>\n

\"Splined<\/figure>\n<\/div>\n<\/div>\n<\/section>\n
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RFQ checklist<\/h2>\n<\/div>\n

Send the sun gear drawing or measured tooth data, mating planet\/ring information, interface dimensions, material\/process requirements, duty, quantity and destination.<\/p>\n<\/div>\n<\/section>\n

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Deeper buyer guidance<\/h2>\n<\/div>\n
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A spline adds a second tooth system to the part, so fit, effective length and concentricity must be controlled independently from the external gear mesh.<\/p>\n

For new designs, use the complete planetary geometry and functional datums before deciding the process route. For replacement work, use photos and equipment references for context but let measured tooth and interface data control the new part.<\/p>\n<\/div>\n

\"Deeper<\/figure>\n<\/div>\n<\/div>\n<\/section>\n
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What to control on the RFQ or drawing<\/h2>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nWhat to define<\/th>\n<\/tr>\n<\/thead>\n
Planetary mesh<\/td>\nSun, planet and ring tooth data plus planet count when known.<\/td>\n<\/tr>\n
Center interface<\/td>\nBore, key, spline or shaft features with functional datums.<\/td>\n<\/tr>\n
Operating duty<\/td>\nRated\/peak torque, speed, reversals\/shock, life and environment.<\/td>\n<\/tr>\n
Material\/process<\/td>\nControlled material, heat treatment, finish and coating requirements.<\/td>\n<\/tr>\n
Acceptance<\/td>\nGear\/runout\/dimensional checks 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 a visual match confirm interchangeability?<\/summary>\n

No. Similar outside dimensions can hide different pitch systems, pressure angles, profile shift or interface fits.<\/p>\n<\/details>\n

\nShould mating gear data be included?<\/summary>\n

Yes whenever available, because planetary geometry is easier to verify as a system.<\/p>\n<\/details>\n

\nWhat if a value is unknown?<\/summary>\n

Mark it as open and provide the available sample, mating component or application data rather than guessing.<\/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

\u041d\u0430\u0434\u0456\u0448\u043b\u0456\u0442\u044c \u043a\u0440\u0435\u0441\u043b\u0435\u043d\u043d\u044f, \u0434\u0430\u043d\u0456 \u043f\u0440\u043e \u0437\u0443\u0431\u0438, \u0456\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0456\u044e \u043f\u0440\u043e \u0441\u043f\u043e\u043b\u0443\u0447\u043d\u0456 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0438, \u0432\u0430\u043d\u0442\u0430\u0436 \u0442\u0430 \u043a\u0456\u043b\u044c\u043a\u0456\u0441\u0442\u044c. \u041c\u0438 \u0440\u043e\u0437\u0433\u043b\u044f\u043d\u0435\u043c\u043e \u0456\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 \u043f\u0435\u0440\u0435\u0434 \u0442\u0438\u043c, \u044f\u043a \u043d\u0430\u0434\u0430\u0442\u0438 \u0446\u0456\u043d\u043e\u0432\u0443 \u043f\u0440\u043e\u043f\u043e\u0437\u0438\u0446\u0456\u044e.<\/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":"

The spline can be as important as the gear teeth. A correct sun gear must both mesh with the planets and fit the drive shaft or hub.<\/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-687","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\/687","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=687"}],"version-history":[{"count":4,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/posts\/687\/revisions"}],"predecessor-version":[{"id":1113,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/posts\/687\/revisions\/1113"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/media\/1100"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/media?parent=687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/categories?post=687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/uk\/wp-json\/wp\/v2\/tags?post=687"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}