{"id":1435,"date":"2026-09-11T08:14:53","date_gmt":"2026-09-11T08:14:53","guid":{"rendered":"https:\/\/injection-molded-parts.com\/product\/plastic-double-spur-gears\/"},"modified":"2026-09-14T07:54:47","modified_gmt":"2026-09-14T07:54:47","slug":"plastic-double-spur-gears","status":"publish","type":"product","link":"https:\/\/injection-molded-parts.com\/uk\/product\/plastic-double-spur-gears\/","title":{"rendered":"Plastic Double Spur Gears"},"content":{"rendered":"
\n

Compound \/ double spur gear<\/h2>\n

A double spur gear combines two tooth sections on a common component, often to create a compact compound reduction. Both meshes and the shared bore or shaft interface must be controlled together.<\/p>\n

Compound gears often place a small and large gear section close together. This can create thick hub regions or thin webs depending on the ratio. The axial relationship between sections should be treated as a functional dimension because each section meshes with a different shaft in the assembly.<\/p>\n<\/section>\n

\n

How to read the product photograph<\/h2>\n

The main image is a photograph of a physical sample or representative component, not a dimensional definition. Resin colour, tooth count, bore or hub features, rack length, inserts and other details can change with the released drawing. Use the photograph to understand the product family; use the controlled drawing, mating interface and agreed inspection plan to manufacture and approve the part.<\/p>\n<\/section>\n

\"Plastic<\/figure>\n
\n

Geometry and interface inputs for Plastic Double Spur Gears<\/h2>\n
    \n
  • Tooth count, module\/DP and pressure angle for both sections<\/li>\n
  • Axial spacing between gear sections<\/li>\n
  • Shared bore, shaft or molded hub geometry<\/li>\n
  • Center distances to both mating gears<\/li>\n
  • Torque path and duty cycle<\/li>\n<\/ul>\n

    \u0414\u043e\u0432\u0456\u0434\u043a\u0430 \u0437 \u0433\u0435\u043e\u043c\u0435\u0442\u0440\u0456\u0457:<\/strong> Compound \/ double spur gear<\/p>\n<\/section>\n

    \n

    \u0412\u0438\u0431\u0456\u0440 \u0432\u0438\u0440\u043e\u0431\u043d\u0438\u0447\u043e\u0433\u043e \u043c\u0430\u0440\u0448\u0440\u0443\u0442\u0443<\/h2>\n

    The part may be molded or machined depending on tooth sizes, hub geometry, quantities and tolerance requirements. For molded designs, hub and web transitions deserve early DFM review.<\/p>\n

    \u0414\u043e\u0432\u0456\u0434\u043a\u0430 \u0437 \u0443\u043f\u0430\u043a\u043e\u0432\u0430\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0446\u0435\u0441\u0443:<\/strong> Process confirmed per drawing; do not assume molding for every configuration<\/p>\n

    \u041d\u0430\u043f\u0440\u044f\u043c\u043e\u043a \u043c\u0430\u0442\u0435\u0440\u0456\u0430\u043b\u0443:<\/strong> Engineering plastic selected by geometry and duty<\/p>\n<\/section>\n

    \"Plastic<\/figure>\n
    \n

    \u041e\u0433\u043b\u044f\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0443, \u043e\u0440\u0456\u0454\u043d\u0442\u043e\u0432\u0430\u043d\u043e\u0433\u043e \u043d\u0430 \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u0435 \u0437\u0430\u0441\u0442\u043e\u0441\u0443\u0432\u0430\u043d\u043d\u044f<\/h2>\n

    Axial spacing, bore runout or warpage can disturb one mesh even when the other appears acceptable.<\/p>\n

    \u0422\u0438\u043f\u043e\u0432\u0435 \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u0430\u043d\u043d\u044f:<\/strong> Compact reducers, office mechanisms, appliance drives and light industrial automation. The final material and tolerance plan should be checked against the load path, mating components and environment in that assembly.<\/p>\n<\/section>\n

    \n

    \u041f\u0435\u0440\u0448\u0438\u0439 \u0437\u0440\u0430\u0437\u043e\u043a \u0442\u0430 \u0444\u043e\u043a\u0443\u0441 \u043f\u0435\u0440\u0435\u0432\u0456\u0440\u043a\u0438<\/h2>\n

    Reference both tooth sections to the common datum\/bore. Composite checks may be useful where the assembly performance is more important than isolated tooth dimensions.<\/p>\n

    \u0420\u0456\u0448\u0435\u043d\u043d\u044f \u0449\u043e\u0434\u043e \u043a\u043e\u0442\u0438\u0440\u0443\u0432\u0430\u043d\u043d\u044f:<\/strong> Define both tooth sections, shared bore or shaft interface, center distances, axial spacing and torque path before production.<\/p>\n<\/section>\n

    \"Plastic<\/figure>\n
    \n

    What to send for a Plastic Double Spur Gears quotation<\/h2>\n

    \u041d\u0430\u0434\u0456\u0448\u043b\u0456\u0442\u044c \u043d\u0430\u0439\u043d\u043e\u0432\u0456\u0448\u0435 \u043a\u0440\u0435\u0441\u043b\u0435\u043d\u043d\u044f \u0430\u0431\u043e \u043c\u043e\u0434\u0435\u043b\u044c CAD \u0440\u0430\u0437\u043e\u043c \u0456\u0437 \u043e\u0431\u0441\u044f\u0433\u043e\u043c \u0432\u0438\u0440\u043e\u0431\u043d\u0438\u0446\u0442\u0432\u0430 \u0442\u0430 \u0443\u043c\u043e\u0432\u0430\u043c\u0438 \u0437\u0430\u0441\u0442\u043e\u0441\u0443\u0432\u0430\u043d\u043d\u044f, \u044f\u043a\u0456 \u0432\u043f\u043b\u0438\u0432\u0430\u044e\u0442\u044c \u043d\u0430 \u043f\u043e\u0441\u0430\u0434\u043a\u0443, \u0437\u043d\u043e\u0441 \u0430\u0431\u043e \u0441\u0442\u0430\u0431\u0456\u043b\u044c\u043d\u0456\u0441\u0442\u044c \u0440\u043e\u0437\u043c\u0456\u0440\u0456\u0432. \u042f\u043a\u0449\u043e \u0434\u0435\u0442\u0430\u043b\u044c \u0437\u0430\u043c\u0456\u043d\u044e\u0454 \u0456\u0441\u043d\u0443\u044e\u0447\u0438\u0439 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442, \u0432\u0438\u0437\u043d\u0430\u0447\u0442\u0435 \u0435\u043b\u0435\u043c\u0435\u043d\u0442\u0438, \u044f\u043a\u0456 \u043f\u043e\u0432\u0438\u043d\u043d\u0456 \u0437\u0430\u043b\u0438\u0448\u0430\u0442\u0438\u0441\u044f \u0432\u0437\u0430\u0454\u043c\u043e\u0437\u0430\u043c\u0456\u043d\u043d\u0438\u043c\u0438, \u0442\u0430 \u0431\u0443\u0434\u044c-\u044f\u043a\u0456 \u0432\u0456\u0434\u043e\u043c\u0456 \u043f\u043e\u043b\u044c\u043e\u0432\u0456 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0438, \u044f\u043a\u0456 \u043c\u0430\u0454 \u0432\u0438\u0440\u0456\u0448\u0438\u0442\u0438 \u043d\u043e\u0432\u0430 \u0434\u0435\u0442\u0430\u043b\u044c.<\/p>\n

      \n
    • \u041a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043e\u0432\u0430\u043d\u0438\u0439 \u043f\u0435\u0440\u0435\u0433\u043b\u044f\u0434 \u043a\u0440\u0435\u0441\u043b\u0435\u043d\u044c \u0442\u0430 3D-\u043c\u043e\u0434\u0435\u043b\u044c, \u044f\u043a\u0449\u043e \u0432\u043e\u043d\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u0456<\/li>\n
    • \u0413\u0435\u043e\u043c\u0435\u0442\u0440\u0456\u044f \u0441\u043f\u043e\u043b\u0443\u0447\u043d\u043e\u0457 \u0447\u0430\u0441\u0442\u0438\u043d\u0438 \u0430\u0431\u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0456<\/li>\n
    • \u0412\u0438\u043c\u043e\u0433\u0438 \u0434\u043e \u043c\u0430\u0442\u0435\u0440\u0456\u0430\u043b\u0456\u0432 \u0430\u0431\u043e \u0443\u043c\u043e\u0432\u0438 \u043e\u0431\u0441\u043b\u0443\u0433\u043e\u0432\u0443\u0432\u0430\u043d\u043d\u044f<\/li>\n
    • \u041a\u0456\u043b\u044c\u043a\u0456\u0441\u0442\u044c \u0437\u0440\u0430\u0437\u043a\u0456\u0432, \u0432\u0438\u0440\u043e\u0431\u043d\u0438\u0447\u0430 \u043f\u0430\u0440\u0442\u0456\u044f \u0442\u0430 \u043e\u0447\u0456\u043a\u0443\u0432\u0430\u043d\u0438\u0439 \u0440\u0456\u0447\u043d\u0438\u0439 \u043f\u043e\u043f\u0438\u0442<\/li>\n
    • \u041a\u0440\u0438\u0442\u0438\u0447\u043d\u0456 \u0440\u043e\u0437\u043c\u0456\u0440\u0438 \u0442\u0430 \u043c\u0435\u0442\u043e\u0434 \u0444\u0443\u043d\u043a\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0457 \u043f\u0440\u0438\u0439\u043d\u044f\u0442\u043d\u043e\u0441\u0442\u0456<\/li>\n<\/ul>\n<\/section>\n
      \n

      Engineering specification to freeze before manufacture<\/h2>\n

      A production drawing should convert the application into measurable inputs. The table below is the minimum review set for this product family; add any assembly-specific datum, finish or acceptance requirement that changes function.<\/p>\n

      \n\n\n\n\n\n\n\n\n\n\n\n\n
      Definition<\/th>\nWhat the supplier needs<\/th>\n<\/tr>\n<\/thead>\n
      Tooth count for both stages<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Module \/ DP for both stages<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Pressure angle<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Face width of each stage<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Axial spacing between stages<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Bore \/ shaft interface<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Both mating center distances<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Torque path and retention<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
      \n

      Failure modes to prevent during design review<\/h2>\n

      Common risks for this geometry include axial stage offset; mismatch between the two center distances; hub distortion around the shared bore. These are best addressed before the first sample by reviewing the complete mating interface, not by tightening every drawing tolerance.<\/p>\n

      Use tolerances selectively. Dimensions that establish the tooth mesh, chain engagement, shaft fit or assembly datum deserve explicit measurement methods; non-critical molded surfaces can often use a more practical general tolerance.<\/p>\n<\/section>\n

      \n

      First-article and production acceptance<\/h2>\n

      Agree the inspection condition, datums and measuring method before sampling. The first-article report should cover the drawing CTQs and then be paired with a functional check in the real assembly or a representative fixture. For gears and sprockets, that can include mesh or chain engagement, runout and bore relationship; for custom molded parts it can include fit, fastening and loaded features.<\/p>\n

      Production control should follow the same CTQs rather than replacing them with a long list of easy-to-measure cosmetic dimensions. If a bore, tooth, insert or mounting surface is secondary-machined, make clear which operation establishes the final datum.<\/p>\n<\/section>\n

      \n

      Engineering decision brief for Plastic Double Spur Gears<\/h2>\n
      \n
      01<\/span><\/p>\n

      Define the geometry<\/h3>\n

      Compound \/ double spur gear The quotation should use the drawing revision and mating interface as the controlling definition rather than an image alone.<\/p>\n<\/article>\n

      02<\/span><\/p>\n

      Choose material by duty<\/h3>\n

      Engineering plastic selected by geometry and duty Material selection should be checked against load, speed, temperature, moisture or chemicals, lubrication and the required dimensional condition.<\/p>\n<\/article>\n

      03<\/span><\/p>\n

      Freeze the production route<\/h3>\n

      Process confirmed per drawing; do not assume molding for every configuration The route should be fixed only after quantity, tolerances, surface requirements and change risk are understood.<\/p>\n<\/article>\n

      04<\/span><\/p>\n

      Agree acceptance<\/h3>\n

      Define both tooth sections, shared bore or shaft interface, center distances, axial spacing and torque path before production. First-article checks should therefore focus on the dimensions and functional interfaces that control the assembly.<\/p>\n<\/article>\n<\/div>\n

      Typical application context:<\/strong> Compact compound reductions, printers, office mechanisms, appliance drives and low-to-moderate duty automation assemblies.<\/p>\n<\/section>\n

      \n

      Plastic Double Spur Gears FAQ<\/h2>\n
      \n
      \n

      What should I send for quotation?<\/h3>\n

      Send the latest 2D drawing and, where available, a 3D model. Add mating-part information, order quantity, service conditions and the features that control fit or motion. A sample is useful for replacement parts with uncertain legacy geometry.<\/p>\n<\/article>\n

      \n

      How should the material be specified?<\/h3>\n

      Material should be selected from service temperature, chemicals or moisture, stiffness, wear, dimensional requirements and production route. A preferred grade can be quoted, but the application requirements should be supplied with it.<\/p>\n<\/article>\n

      \n

      How is the first sample approved?<\/h3>\n

      Define the CTQs, inspection state and functional test before the sample is produced. Approval should confirm both measurable geometry and the behavior of the part in its intended interface.<\/p>\n<\/article>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

      Compound or double spur gear components for multi-stage compact drives where both tooth sets, axial spacing, hub geometry, runout and molding or machining route must be defined from the assembly.<\/p>","protected":false},"featured_media":1581,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[2578],"product_tag":[],"class_list":["post-1435","product","type-product","status-publish","has-post-thumbnail","product_cat-plastic-spur-gears","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/product\/1435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/comments?post=1435"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/media\/1581"}],"wp:attachment":[{"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/media?parent=1435"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/product_cat?post=1435"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/injection-molded-parts.com\/uk\/wp-json\/wp\/v2\/product_tag?post=1435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}