{"product_id":"05-module-plastic-helical-pinion-gear-diy-model-parts","title":"Main shaft Pinion Gear 0.5 Module Toy Helical Parts Model DIY Plastic Gears Hole","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e0.5 Module Plastic Helical Pinion Gear — Precision DIY Motion Control\u003c\/h2\u003e\n    \u003cp\u003eWhen your model, toy mechanism, or small automation project demands smooth, quiet power transfer, a mismatched or worn pinion gear becomes the weakest link. Makers, hobbyists, and prototype engineers who build RC vehicles, robotic arms, or motorized display models need a reliable main shaft pinion gear that fits precisely and runs quietly under load.\u003c\/p\u003e\n    \u003cp\u003eThese 0.5 module helical pinion gears are molded from engineering-grade plastic (typically POM or ABS), offering a lightweight yet rigid construction. Bore diameters typically range from 2.0 mm to 3.2 mm (approx. 0.079–0.126 in), with outer diameters varying by tooth count across the available specification variants. Tooth counts span from 72 to 183 teeth depending on the selected variant.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include DIY gear train assemblies for motorized toy cars and robots, main shaft drive systems in small CNC or automation prototypes, and replacement pinion gears for model kits requiring 0.5 module helical tooth profiles.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n    \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for 0.5 module gear systems. Verify bore diameter and tooth count against your shaft and mating gear before ordering. Mix-and-match variants available — select Specification and Amount above.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 0.5 Module Helical Pinion Gears\u003c\/h2\u003e\n    \u003cdiv class=\"hdiy-list\"\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eHelical Tooth Profile\u003c\/strong\u003e\n        \u003cp\u003eAngled teeth engage progressively for smoother, quieter operation compared to straight-cut spur gears — ideal for noise-sensitive model and toy applications.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🧱\u003c\/span\u003e\n        \u003cstrong\u003eEngineering-Grade Plastic Construction\u003c\/strong\u003e\n        \u003cp\u003eMolded from rigid plastic (typically POM or ABS) for a balance of low weight, dimensional stability, and adequate load capacity in light-duty drive trains.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003e0.5 Module Standard\u003c\/strong\u003e\n        \u003cp\u003eConforms to the 0.5 module (m0.5) gear standard, ensuring direct interchangeability with other m0.5 gears in your assembly without custom machining.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eWide Tooth Count Selection\u003c\/strong\u003e\n        \u003cp\u003eAvailable in variants from 72A to 183A tooth configurations, letting you dial in the exact gear ratio your mechanism requires without compromise.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eMultiple Bore Options\u003c\/strong\u003e\n        \u003cp\u003eBore diameters of 2.3 mm and 3.17 mm variants are available alongside standard bore sizes, accommodating a range of motor shaft and axle diameters common in DIY projects.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n        \u003cp\u003eOrder as a single piece for prototyping or in a 5-pack for production builds and spares — choose your quantity in the Amount option above.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — 0.5 Module Helical Pinion Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e0.5 (m0.5)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eEngineering-grade plastic (POM or ABS)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (typically 2.0–3.2 mm \/ 0.079–0.126 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eGear Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor \/ Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options (Blue, White, Orange-Red available)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pc or 5 pcs (select above)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eDIY models, toy mechanisms, robotics, small automation\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right tooth count for my project?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the tooth count to your required gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For example, pairing a 20-tooth motor gear with a 100-tooth output gear gives a 5:1 reduction. Select the variant closest to your calculated pinion tooth count.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore diameter should I select?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft or axle diameter with calipers. Common motor shaft sizes in DIY projects are 2.0 mm, 2.3 mm, and 3.17 mm. Choose the variant whose bore matches your shaft. If your shaft is slightly undersized, a set screw or adhesive can secure the fit.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears strong enough for motorized applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are designed for light-duty applications such as toy mechanisms, model assemblies, and small robotic joints. They handle low-to-moderate torque loads well. For high-torque or continuous industrial duty, metal gears are recommended instead.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWill these gears resist moisture or outdoor conditions?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePOM (Delrin) plastic offers good moisture resistance and dimensional stability in humid environments. ABS variants are suitable for indoor use. Neither material is rated for prolonged UV or outdoor exposure without protective housing. For outdoor builds, consider enclosing the gear train.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these compatible with standard 0.5 module spur gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese are helical gears with a 0.5 module pitch. They are not directly interchangeable with spur gears of the same module because the helix angle changes the effective tooth engagement. They should be paired with matching m0.5 helical gears of the same helix angle for proper meshing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the standard and \"Lengthened\" or \"Long section\" variants?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe \"Lengthened\" and \"Long section\" variants have an extended gear width or hub length compared to the standard variants. This provides more tooth engagement surface and a longer shaft grip, which is useful when your design requires extra axial stability or a deeper gear mesh.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these gears for 3D printer or CNC extruder builds?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese m0.5 plastic helical gears are suitable for light-duty motion control in DIY CNC and extruder prototypes where torque demands are low. For production-grade 3D printer extruders that run continuously under load, metal gears are a more durable choice.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Specification and Amount above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right tooth count for my project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the tooth count to your required gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For example, pairing a 20-tooth motor gear with a 100-tooth output gear gives a 5:1 reduction. Select the variant closest to your calculated pinion tooth count.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore diameter should I select?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor shaft or axle diameter with calipers. Common motor shaft sizes in DIY projects are 2.0 mm, 2.3 mm, and 3.17 mm. Choose the variant whose bore matches your shaft. If your shaft is slightly undersized, a set screw or adhesive can secure the fit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears strong enough for motorized applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears are designed for light-duty applications such as toy mechanisms, model assemblies, and small robotic joints. They handle low-to-moderate torque loads well. 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They should be paired with matching m0.5 helical gears of the same helix angle for proper meshing, not standard spur gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the standard and Lengthened or Long section variants?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Lengthened and Long section variants have an extended gear width or hub length, providing more tooth engagement surface and a longer shaft grip for extra axial stability.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears for 3D printer or CNC extruder builds?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These m0.5 plastic helical gears are suitable for light-duty motion control in DIY CNC and extruder prototypes where torque demands are low. For production-grade extruders running continuously under load, metal gears are a more durable choice.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"80.8A \/ 1","offer_id":52439903109394,"sku":"GYLXKKMX2513x1","price":2.05,"currency_code":"USD","in_stock":true},{"title":"81.5A \/ 1","offer_id":52439903142162,"sku":"GYLXKKMX2514x1","price":2.05,"currency_code":"USD","in_stock":true},{"title":"182A \/ 1","offer_id":52439903174930,"sku":"GYLXKKMX2515x1","price":2.07,"currency_code":"USD","in_stock":true},{"title":"81A \/ 1","offer_id":52439903207698,"sku":"GYLXKKMX2516x1","price":2.05,"currency_code":"USD","in_stock":true},{"title":"82A \/ 1","offer_id":52439903240466,"sku":"GYLXKKMX2517x1","price":2.05,"currency_code":"USD","in_stock":true},{"title":"142A \/ 1","offer_id":52439903273234,"sku":"GYLXKKMX2518x1","price":2.07,"currency_code":"USD","in_stock":true},{"title":"122A \/ 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