{"id":1076,"date":"2026-10-09T02:48:17","date_gmt":"2026-10-09T02:48:17","guid":{"rendered":"https:\/\/sun-gears.net\/gear-grinding-vs-hobbing-sun-gears\/"},"modified":"2026-10-09T05:45:08","modified_gmt":"2026-10-09T05:45:08","slug":"gear-grinding-vs-hobbing-sun-gears","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/th\/gear-grinding-vs-hobbing-sun-gears\/","title":{"rendered":"Gear Tooth Grinding vs. Hobbing for Sun Gears"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Gear Tooth Grinding vs. Hobbing for Sun Gears<\/h1>\n

Hobbing is a productive gear-tooth cutting method, while grinding is a finishing route used when the approved accuracy or post-heat-treatment requirement calls for it.<\/p>\n

Technical Guide<\/span>Sun Gear<\/span>Planetary Gear<\/span><\/div>\n
\u0e02\u0e2d\u0e43\u0e1a\u0e40\u0e2a\u0e19\u0e2d\u0e23\u0e32\u0e04\u0e32<\/a>Knowledge Center<\/a><\/div>\n<\/div>\n
\"Gear<\/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 useful manufacturing question is how hobbing and gear grinding protects the function defined on the drawing. Process names are not quality levels by themselves; the required tooth, runout, hardness and interface results are what matter.<\/p>\n

Heat treatment can move the part, so machining allowance and final datum recovery should be planned before hardening when tight gear, bore or shaft relationships are required.<\/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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Inspection should match the acceptance plan. Tooth-size checks, runout, profile\/lead, hardness and dimensional measurements are selected according to the drawing and application rather than applied as a generic bundle.<\/p>\n

If reports or certificates are required, state them at RFQ stage so the manufacturing and sampling plan can include them.<\/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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\u0e23\u0e32\u0e22\u0e01\u0e32\u0e23<\/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
\u0e2b\u0e19\u0e49\u0e32\u0e17\u0e35\u0e48<\/td>\nRated\/peak torque, speed, reversals\/shock, life, lubrication and environment.<\/td>\n<\/tr>\n
\u0e01\u0e23\u0e30\u0e1a\u0e27\u0e19\u0e01\u0e32\u0e23<\/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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\u0e04\u0e33\u0e16\u0e32\u0e21\u0e17\u0e35\u0e48\u0e1e\u0e1a\u0e1a\u0e48\u0e2d\u0e22<\/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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\u0e04\u0e33\u0e02\u0e2d\u0e40\u0e2a\u0e19\u0e2d\u0e23\u0e32\u0e04\u0e32 (RFQ)<\/div>\n

\u0e02\u0e2d\u0e43\u0e1a\u0e40\u0e2a\u0e19\u0e2d\u0e23\u0e32\u0e04\u0e32 \/ \u0e2a\u0e48\u0e07 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

\u0e2a\u0e48\u0e07\u0e04\u0e33\u0e02\u0e2d\u0e40\u0e2a\u0e19\u0e2d\u0e23\u0e32\u0e04\u0e32 (RFQ)<\/a><\/div>\n

MOQ<\/strong>\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e1b\u0e23\u0e31\u0e1a\u0e40\u0e1b\u0e25\u0e35\u0e48\u0e22\u0e19\u0e44\u0e14\u0e49\u0e15\u0e32\u0e21\u0e1b\u0e23\u0e30\u0e40\u0e20\u0e17\u0e2a\u0e34\u0e19\u0e04\u0e49\u0e32\u0e41\u0e25\u0e30\u0e21\u0e39\u0e25\u0e04\u0e48\u0e32\u0e01\u0e32\u0e23\u0e2a\u0e31\u0e48\u0e07\u0e0b\u0e37\u0e49\u0e2d\u0e23\u0e27\u0e21<\/span><\/div>
\u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07<\/strong>\u0e25\u0e39\u0e01\u0e04\u0e49\u0e32\u0e43\u0e2b\u0e21\u0e48\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e2a\u0e31\u0e48\u0e07\u0e0b\u0e37\u0e49\u0e2d\u0e44\u0e14\u0e49 1-5 \u0e0a\u0e34\u0e49\u0e19 \u0e2b\u0e32\u0e01\u0e0a\u0e34\u0e49\u0e19\u0e2a\u0e48\u0e27\u0e19\u0e41\u0e25\u0e30\u0e01\u0e23\u0e30\u0e1a\u0e27\u0e19\u0e01\u0e32\u0e23\u0e40\u0e2b\u0e21\u0e32\u0e30\u0e2a\u0e21<\/span><\/div>
\u0e04\u0e33\u0e2a\u0e31\u0e48\u0e07\u0e0b\u0e37\u0e49\u0e2d\u0e41\u0e1a\u0e1a\u0e1c\u0e2a\u0e21<\/strong>\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e40\u0e25\u0e37\u0e2d\u0e01\u0e0b\u0e37\u0e49\u0e2d\u0e0a\u0e38\u0e14\u0e40\u0e1f\u0e37\u0e2d\u0e07\u0e14\u0e27\u0e07\u0e2d\u0e32\u0e17\u0e34\u0e15\u0e22\u0e4c\u0e2b\u0e23\u0e37\u0e2d\u0e0a\u0e34\u0e49\u0e19\u0e2a\u0e48\u0e27\u0e19\u0e23\u0e30\u0e1a\u0e1a\u0e40\u0e1f\u0e37\u0e2d\u0e07\u0e14\u0e32\u0e27\u0e40\u0e04\u0e23\u0e32\u0e30\u0e2b\u0e4c\u0e23\u0e38\u0e48\u0e19\u0e15\u0e48\u0e32\u0e07\u0e46 \u0e21\u0e32\u0e1c\u0e2a\u0e21\u0e1c\u0e2a\u0e32\u0e19\u0e01\u0e31\u0e19\u0e44\u0e14\u0e49 \u0e40\u0e21\u0e37\u0e48\u0e2d\u0e21\u0e39\u0e25\u0e04\u0e48\u0e32\u0e01\u0e32\u0e23\u0e2a\u0e31\u0e48\u0e07\u0e0b\u0e37\u0e49\u0e2d\u0e23\u0e27\u0e21\u0e2d\u0e22\u0e39\u0e48\u0e17\u0e35\u0e48\u0e1b\u0e23\u0e30\u0e21\u0e32\u0e13 1,500 \u0e14\u0e2d\u0e25\u0e25\u0e32\u0e23\u0e4c\u0e2a\u0e2b\u0e23\u0e31\u0e10\u0e02\u0e36\u0e49\u0e19\u0e44\u0e1b<\/span><\/div>
\u0e04\u0e33\u0e2a\u0e31\u0e48\u0e07\u0e0b\u0e37\u0e49\u0e2d\u0e02\u0e19\u0e32\u0e14\u0e40\u0e25\u0e47\u0e01<\/strong>\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e1e\u0e34\u0e08\u0e32\u0e23\u0e13\u0e32\u0e2a\u0e31\u0e48\u0e07\u0e0b\u0e37\u0e49\u0e2d\u0e15\u0e31\u0e49\u0e07\u0e41\u0e15\u0e48 1-2 \u0e0a\u0e34\u0e49\u0e19\u0e02\u0e36\u0e49\u0e19\u0e44\u0e1b\u0e44\u0e14\u0e49 \u0e42\u0e14\u0e22\u0e1b\u0e01\u0e15\u0e34\u0e41\u0e25\u0e49\u0e27\u0e23\u0e32\u0e04\u0e32\u0e15\u0e48\u0e2d\u0e2b\u0e19\u0e48\u0e27\u0e22\u0e08\u0e30\u0e2a\u0e39\u0e07\u0e01\u0e27\u0e48\u0e32\u0e1b\u0e01\u0e15\u0e34<\/span><\/div>
\u0e08\u0e31\u0e14\u0e2a\u0e48\u0e07<\/strong>\u0e0a\u0e34\u0e49\u0e19\u0e2a\u0e48\u0e27\u0e19\u0e21\u0e32\u0e15\u0e23\u0e10\u0e32\u0e19: 10-25 \u0e27\u0e31\u0e19\u0e17\u0e33\u0e01\u0e32\u0e23 \u0e0a\u0e34\u0e49\u0e19\u0e2a\u0e48\u0e27\u0e19\u0e2a\u0e31\u0e48\u0e07\u0e17\u0e33\u0e1e\u0e34\u0e40\u0e28\u0e29: 20-45 \u0e27\u0e31\u0e19\u0e17\u0e33\u0e01\u0e32\u0e23 \u0e2d\u0e38\u0e1b\u0e01\u0e23\u0e13\u0e4c\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e42\u0e04\u0e23\u0e07\u0e01\u0e32\u0e23: 45-120 \u0e27\u0e31\u0e19\u0e17\u0e33\u0e01\u0e32\u0e23<\/span><\/div>
\u0e40\u0e07\u0e37\u0e48\u0e2d\u0e19\u0e44\u0e02\u0e01\u0e32\u0e23\u0e04\u0e49\u0e32<\/strong>EXW, FOB, CIF \u0e41\u0e25\u0e30 DAP \u0e40\u0e1b\u0e47\u0e19\u0e23\u0e39\u0e1b\u0e41\u0e1a\u0e1a\u0e2a\u0e31\u0e0d\u0e0d\u0e32\u0e17\u0e35\u0e48\u0e43\u0e0a\u0e49\u0e01\u0e31\u0e19\u0e17\u0e31\u0e48\u0e27\u0e44\u0e1b \u0e2a\u0e48\u0e27\u0e19 FCA, CFR, CPT, CIP \u0e41\u0e25\u0e30 DDP \u0e19\u0e31\u0e49\u0e19 \u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e1e\u0e34\u0e08\u0e32\u0e23\u0e13\u0e32\u0e40\u0e1b\u0e47\u0e19\u0e01\u0e23\u0e13\u0e35\u0e46 \u0e44\u0e1b\u0e44\u0e14\u0e49<\/span><\/div><\/div><\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

Hobbing is a productive gear-tooth cutting method, while grinding is a finishing route used when the approved accuracy or post-heat-treatment requirement calls for it.<\/p>","protected":false},"author":1,"featured_media":1095,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sun-gears"],"_links":{"self":[{"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/posts\/1076","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/comments?post=1076"}],"version-history":[{"count":1,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/posts\/1076\/revisions"}],"predecessor-version":[{"id":1122,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/posts\/1076\/revisions\/1122"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/media\/1095"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/media?parent=1076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/categories?post=1076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/tags?post=1076"}],"curies":[{"name":"\u0e14\u0e31\u0e1a\u0e40\u0e1a\u0e34\u0e25\u0e22\u0e39\u0e1e\u0e35","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}