{"id":1074,"date":"2026-10-09T02:48:07","date_gmt":"2026-10-09T02:48:07","guid":{"rendered":"https:\/\/sun-gears.net\/hollow-sun-gears-compact-design\/"},"modified":"2026-10-09T05:44:51","modified_gmt":"2026-10-09T05:44:51","slug":"hollow-sun-gears-compact-design","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/hi\/hollow-sun-gears-compact-design\/","title":{"rendered":"Hollow Sun Gears for Coaxial and Compact Designs"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Hollow Sun Gears for Coaxial and Compact Designs<\/h1>\n

A hollow center can create space for shafts, sleeves or passages, but the remaining section, runout and heat-treatment route still have to support the duty.<\/p>\n

Technical Guide<\/span>Sun Gear<\/span>Planetary Gear<\/span><\/div>\n
\u090f\u0915 \u0909\u0926\u094d\u0927\u0930\u0923 \u0915\u093e \u0905\u0928\u0941\u0930\u094b\u0927 \u0915\u0930\u0947\u0902<\/a>Knowledge Center<\/a><\/div>\n<\/div>\n
\"Hollow<\/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 hollow and through-bore geometry. 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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\u0935\u0938\u094d\u0924\u0941<\/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
\u0915\u0930\u094d\u0924\u0935\u094d\u092f<\/td>\nRated\/peak torque, speed, reversals\/shock, life, lubrication and environment.<\/td>\n<\/tr>\n
\u092a\u094d\u0930\u0915\u094d\u0930\u093f\u092f\u093e<\/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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\u0906\u0930\u090f\u092b\u0915\u094d\u092f\u0942<\/div>\n

\u0915\u094b\u091f\u0947\u0936\u0928 \u0915\u093e \u0905\u0928\u0941\u0930\u094b\u0927 \u0915\u0930\u0947\u0902 \/ \u0906\u0930\u090f\u092b\u0915\u094d\u092f\u0942 \u092d\u0947\u091c\u0947\u0902<\/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

\u0906\u0930\u090f\u092b\u0915\u094d\u092f\u0942 \u092d\u0947\u091c\u0947\u0902<\/a><\/div>\n

\u0928\u094d\u092f\u0942\u0928\u0924\u092e \u092e\u093e\u0924\u094d\u0930\u093e<\/strong>\u0909\u0924\u094d\u092a\u093e\u0926 \u0915\u0947 \u092a\u094d\u0930\u0915\u093e\u0930 \u0914\u0930 \u0915\u0941\u0932 \u0911\u0930\u094d\u0921\u0930 \u092e\u0942\u0932\u094d\u092f \u0915\u0947 \u0906\u0927\u093e\u0930 \u092a\u0930 \u0932\u091a\u0940\u0932\u093e\u092a\u0928\u0964<\/span><\/div>
\u0928\u092e\u0942\u0928\u0947<\/strong>\u091c\u092c \u092a\u0941\u0930\u094d\u091c\u093e \u0914\u0930 \u092a\u094d\u0930\u0915\u094d\u0930\u093f\u092f\u093e \u0909\u092a\u092f\u0941\u0915\u094d\u0924 \u0939\u094b\u0902, \u0924\u094b \u0928\u090f \u0917\u094d\u0930\u093e\u0939\u0915 1-5 \u092a\u0940\u0938 \u0915\u093e \u0905\u0928\u0941\u0930\u094b\u0927 \u0915\u0930 \u0938\u0915\u0924\u0947 \u0939\u0948\u0902\u0964<\/span><\/div>
\u092e\u093f\u0936\u094d\u0930\u093f\u0924 \u0911\u0930\u094d\u0921\u0930<\/strong>\u0935\u093f\u092d\u093f\u0928\u094d\u0928 \u092a\u094d\u0930\u0915\u093e\u0930 \u0915\u0947 \u0938\u0928 \u0917\u093f\u092f\u0930 \u092f\u093e \u0938\u0902\u092c\u0902\u0927\u093f\u0924 \u0917\u094d\u0930\u0939\u0940\u092f \u0918\u091f\u0915 \u092e\u0949\u0921\u0932\u094b\u0902 \u0915\u094b \u0924\u092c \u0938\u0902\u092f\u094b\u091c\u093f\u0924 \u0915\u093f\u092f\u093e \u091c\u093e \u0938\u0915\u0924\u093e \u0939\u0948 \u091c\u092c \u0915\u0941\u0932 \u0911\u0930\u094d\u0921\u0930 \u092e\u0942\u0932\u094d\u092f \u0932\u0917\u092d\u0917 1,500 \u0905\u092e\u0947\u0930\u093f\u0915\u0940 \u0921\u0949\u0932\u0930 \u092f\u093e \u0909\u0938\u0938\u0947 \u0905\u0927\u093f\u0915 \u0939\u094b\u0964<\/span><\/div>
\u091b\u094b\u091f\u0947 \u0911\u0930\u094d\u0921\u0930<\/strong>1-2 \u092a\u0940\u0938 \u0915\u0947 \u0911\u0930\u094d\u0921\u0930 \u092a\u0930 \u092c\u093e\u0924\u091a\u0940\u0924 \u0915\u0940 \u091c\u093e \u0938\u0915\u0924\u0940 \u0939\u0948, \u0906\u092e\u0924\u094c\u0930 \u092a\u0930 \u0907\u0928\u0915\u0940 \u092a\u094d\u0930\u0924\u093f \u092f\u0942\u0928\u093f\u091f \u0932\u093e\u0917\u0924 \u0905\u0927\u093f\u0915 \u0939\u094b\u0924\u0940 \u0939\u0948\u0964<\/span><\/div>
\u0935\u093f\u0924\u0930\u0923<\/strong>\u092e\u093e\u0928\u0915 \u092a\u0941\u0930\u094d\u091c\u0947: 10-25 \u0915\u093e\u0930\u094d\u092f\u0926\u093f\u0935\u0938\u0964 \u0905\u0928\u0941\u0915\u0942\u0932\u093f\u0924 \u092a\u0941\u0930\u094d\u091c\u0947: 20-45 \u0915\u093e\u0930\u094d\u092f\u0926\u093f\u0935\u0938\u0964 \u092a\u0930\u093f\u092f\u094b\u091c\u0928\u093e \u0909\u092a\u0915\u0930\u0923: 45-120 \u0915\u093e\u0930\u094d\u092f\u0926\u093f\u0935\u0938\u0964<\/span><\/div>
\u0935\u094d\u092f\u093e\u092a\u093e\u0930 \u0915\u0947 \u0928\u093f\u092f\u092e<\/strong>EXW, FOB, CIF \u0914\u0930 DAP \u0906\u092e\u0924\u094c\u0930 \u092a\u0930 \u092e\u093e\u0928\u094d\u092f \u0939\u0948\u0902\u0964 FCA, CFR, CPT, CIP \u0914\u0930 DDP \u092a\u0930 \u092e\u093e\u092e\u0932\u0947 \u0915\u0947 \u0905\u0928\u0941\u0938\u093e\u0930 \u091a\u0930\u094d\u091a\u093e \u0915\u0940 \u091c\u093e \u0938\u0915\u0924\u0940 \u0939\u0948\u0964<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

A hollow center can create space for shafts, sleeves or passages, but the remaining section, runout and heat-treatment route still have to support the duty.<\/p>","protected":false},"author":1,"featured_media":1005,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1074","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/posts\/1074","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/comments?post=1074"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/posts\/1074\/revisions"}],"predecessor-version":[{"id":1120,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/posts\/1074\/revisions\/1120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/media\/1005"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/media?parent=1074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/categories?post=1074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/hi\/wp-json\/wp\/v2\/tags?post=1074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}