{"id":1438,"date":"2026-09-11T08:15:01","date_gmt":"2026-09-11T08:15:01","guid":{"rendered":"https:\/\/injection-molded-parts.com\/product\/plastic-spur-gears\/"},"modified":"2026-09-14T07:55:02","modified_gmt":"2026-09-14T07:55:02","slug":"plastic-spur-gears","status":"publish","type":"product","link":"https:\/\/injection-molded-parts.com\/it\/prodotto\/plastic-spur-gears\/","title":{"rendered":"Ingranaggi cilindrici in plastica"},"content":{"rendered":"
\n

Parallel-shaft spur gear<\/h2>\n

Spur gears are a direct choice for many parallel-shaft mechanisms. Working performance still depends on center distance, bore\/shaft accuracy, mating gear, material, face width and backlash.<\/p>\n

A press-fit bore can expand the hub and subtly change tooth runout or root stress. When the hub is relatively thin, the shaft fit should be reviewed together with the gear material and molding history. If a keyed or D-shaped bore is used, show the torque path rather than specifying bore size alone.<\/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

\n

Geometry and interface inputs for Plastic Spur Gears<\/h2>\n
    \n
  • Tooth count, module\/DP and pressure angle<\/li>\n
  • Face width and outside diameter limits<\/li>\n
  • Bore, hub, keyway or press-fit details<\/li>\n
  • Mating gear and center distance<\/li>\n
  • Speed, load, duty and noise target<\/li>\n<\/ul>\n

    Riferimento geometrico:<\/strong> Straight-tooth parallel-axis gear<\/p>\n<\/section>\n

    \n

    Scelta del percorso produttivo<\/h2>\n

    Spur gears can be injection molded for repeat volumes or machined for lower-volume, larger or material-specific projects. Secondary bore or datum machining may be considered when the assembly requires it.<\/p>\n

    Riferimento al processo di confezionamento:<\/strong> Molded and machined plastic spur gears are separate routes<\/p>\n

    Direzione del materiale:<\/strong> POM, nylon and other engineering polymers by requirement<\/p>\n<\/section>\n

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

    Revisione della progettazione specifica dell'applicazione<\/h2>\n

    Tight center distance, excessive press fit, shaft runout or thermal\/moisture growth can reduce working backlash and increase noise or wear.<\/p>\n

    Utilizzo tipico:<\/strong> Printers, appliances, packaging mechanisms, automation and general compact drives. 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

    Primo campione e focus dell'ispezione<\/h2>\n

    Use drawing-defined gear measurements together with bore\/runout checks. An assembled roll or functional mesh check may reveal issues not visible from a single diameter measurement.<\/p>\n

    Decisione sul preventivo:<\/strong> Module or DP, tooth count, pressure angle, bore, hub, face width, mating center distance and backlash define the core configuration.<\/p>\n<\/section>\n

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

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

    Inviare il disegno o il modello CAD pi\u00f9 recente, unitamente alla quantit\u00e0 di produzione e alle condizioni di applicazione che influiscono su montaggio, usura o stabilit\u00e0 dimensionale. Se il componente sostituisce un componente esistente, specificare le caratteristiche che devono rimanere intercambiabili e qualsiasi problema noto riscontrato sul campo che il nuovo componente intende risolvere.<\/p>\n

      \n
    • Revisione controllata del disegno e modello 3D, se disponibile.<\/li>\n
    • Geometria della parte di accoppiamento o della trasmissione<\/li>\n
    • Requisiti dei materiali o ambiente di servizio<\/li>\n
    • Quantit\u00e0 del campione, lotto di produzione e domanda annua prevista<\/li>\n
    • Dimensioni critiche e metodo di accettazione funzionale<\/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
      Module or DP<\/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
      Tooth count<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Face width<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Bore \/ key \/ D-flat<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Hub geometry<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Mating center distance<\/td>\nShow the value, tolerance or functional requirement on the latest drawing.<\/td>\n<\/tr>\n
      Torque, speed and working backlash<\/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 insufficient working backlash; bore-induced runout; hub\/root stress from aggressive press fit. 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 Spur Gears<\/h2>\n
      \n
      01<\/span><\/p>\n

      Define the geometry<\/h3>\n

      Straight-tooth parallel-axis 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

      POM, nylon and other engineering polymers by requirement 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

      Molded and machined plastic spur gears are separate routes 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

      Module or DP, tooth count, pressure angle, bore, hub, face width, mating center distance and backlash define the core configuration. 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> Packaging, conveyors, office equipment, instruments, small machinery and custom electromechanical assemblies.<\/p>\n<\/section>\n

      \n

      Plastic 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

      For POM or nylon projects, material family alone is not enough. Confirm the actual grade when it is mandatory, and state moisture, temperature, lubricant and mating material so dimensional and wear behavior can be reviewed.<\/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":"

      Straight-tooth plastic spur gears for parallel-shaft drives, with module or DP, pressure angle, tooth count, face width, bore\/hub geometry, mate and backlash defined before quotation.<\/p>","protected":false},"featured_media":1328,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[2578],"product_tag":[],"class_list":["post-1438","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\/it\/wp-json\/wp\/v2\/product\/1438","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/comments?post=1438"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/media\/1328"}],"wp:attachment":[{"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/media?parent=1438"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/product_cat?post=1438"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/injection-molded-parts.com\/it\/wp-json\/wp\/v2\/product_tag?post=1438"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}