{"id":685,"date":"2026-10-08T07:37:25","date_gmt":"2026-10-08T07:37:25","guid":{"rendered":"https:\/\/sun-gears.net\/gear-rack-module-dp-pressure-angle\/"},"modified":"2026-10-09T05:43:38","modified_gmt":"2026-10-09T05:43:38","slug":"sun-gear-module-dp-pressure-angle","status":"publish","type":"post","link":"https:\/\/sun-gears.net\/th\/sun-gear-module-dp-pressure-angle\/","title":{"rendered":"Sun Gear Module, DP and Pressure Angle"},"content":{"rendered":"
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KNOWLEDGE<\/div>\n

Sun Gear Module, DP and Pressure Angle<\/h1>\n

Module or diametral pitch sets tooth size, while pressure angle defines the involute geometry. Both must match the mating planet gears.<\/p>\n

Technical Guide<\/span>Planetary Gear<\/span>\u0e04\u0e33\u0e02\u0e2d\u0e40\u0e2a\u0e19\u0e2d\u0e23\u0e32\u0e04\u0e32 (RFQ)<\/span><\/div>\n
\u0e02\u0e2d\u0e43\u0e1a\u0e40\u0e2a\u0e19\u0e2d\u0e23\u0e32\u0e04\u0e32<\/a>\u0e40\u0e23\u0e35\u0e22\u0e01\u0e14\u0e39\u0e2a\u0e34\u0e19\u0e04\u0e49\u0e32<\/a><\/div>\n<\/div>\n
\"Sun<\/figure>\n<\/div>\n<\/section>\n
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Module vs. DP<\/h2>\n<\/div>\n

Module is a metric pitch system; diametral pitch is an inch-based system. Do not convert by visual estimation.<\/p>\n<\/div>\n<\/section>\n

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Pressure angle<\/h2>\n<\/div>\n

A gear with the wrong pressure angle may appear close in size but will not have the correct tooth contact.<\/p>\n<\/div>\n<\/section>\n

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Replacement check<\/h2>\n<\/div>\n

Measure or obtain the mating planet gears and use the original drawing whenever possible.<\/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

\"Sun<\/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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Module or DP and pressure angle are fundamental tooth-system values. They should be preserved exactly from the controlled design rather than approximated from appearance.<\/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
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\u0e23\u0e32\u0e22\u0e01\u0e32\u0e23<\/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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\u0e04\u0e33\u0e16\u0e32\u0e21\u0e17\u0e35\u0e48\u0e1e\u0e1a\u0e1a\u0e48\u0e2d\u0e22<\/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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\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, tooth data, mating-component information, duty and quantity. We will review the interface before quotation.<\/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":"

Module or diametral pitch sets tooth size, while pressure angle defines the involute geometry. Both must match the mating planet gears.<\/p>","protected":false},"author":1,"featured_media":1094,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-685","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\/685","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=685"}],"version-history":[{"count":4,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/posts\/685\/revisions"}],"predecessor-version":[{"id":1111,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/posts\/685\/revisions\/1111"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/media\/1094"}],"wp:attachment":[{"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/media?parent=685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/categories?post=685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sun-gears.net\/th\/wp-json\/wp\/v2\/tags?post=685"}],"curies":[{"name":"\u0e14\u0e31\u0e1a\u0e40\u0e1a\u0e34\u0e25\u0e22\u0e39\u0e1e\u0e35","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}