{"product_id":"1-mod-20-teeth-blue-nylon-spur-gear-bore-4mm-12mm-pinion-plastic-gear-step","title":"1 Mod 20 Teeth Blue Nylon Spur Gear Bore 4mm-12mm Pinion Plastic Gear with Step","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e1 Mod 20 Teeth Blue Nylon Spur Gear — Versatile Pinion for Multi-Shaft DIY Drive Systems\u003c\/h2\u003e\n    \u003cp\u003eSourcing a single nylon pinion that covers the widest possible range of motor shaft diameters — from small hobby motors to mid-frame stepper shafts — without ordering multiple SKUs is a common frustration for robotics engineers, automation hobbyists, and mechatronics educators. The 1 Mod 20 Teeth Blue Nylon Spur Gear solves this with eight stepped bore options spanning 4 mm to 12 mm, making it one of the most shaft-compatible Module 1 plastic pinions available for DIY and light industrial drive applications.\u003c\/p\u003e\n    \u003cp\u003eThis stepped-bore nylon spur gear is formed from engineering-grade blue nylon (PA-class polymer), offering dimensional stability, inherent self-lubrication, and resistance to oils and mild chemicals. The gear carries 20 teeth at Module 1, giving a pitch diameter of 20 mm (approx. 0.79 in) and an outer diameter of approximately 22 mm (0.87 in). The stepped bore accommodates shaft diameters of 4, 5, 6, 6.35, 7, 8, 10, and 12 mm (0.16 in to 0.47 in), covering small DC motors, NEMA 14\/17\/23 stepper shafts, and 1\/4-inch imperial shafts (6.35 mm).\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include: motor-to-gearbox pinion stages in wheeled robots and conveyor prototypes where a 1 Mod 20-tooth nylon spur gear pairs with a larger mating gear for speed reduction; feed-axis and Z-axis drives in desktop CNC routers and 3D printers requiring a low-noise Module 1 plastic pinion on a NEMA 17 or NEMA 23 shaft; and educational mechatronics assemblies where a single interchangeable 20-tooth nylon gear meshes with standard 1M racks, worm wheels, or compound gear trains.\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 Meshes with all Module 1 (1M) spur gears, racks, and pinions. Eight bore options — 4 \/ 5 \/ 6 \/ 6.35 \/ 7 \/ 8 \/ 10 \/ 12 mm — cover standard metric and 1\/4-inch imperial motor shafts. Verify shaft diameter before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 1 Mod 20 Teeth Blue Nylon Spur Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n        \u003cstrong\u003eEngineering-Grade Blue Nylon Body\u003c\/strong\u003e\u003cbr\u003e\n        Formed from PA-class nylon polymer — dimensionally stable under load, self-lubricating, and resistant to oils and mild chemicals for reliable service life in dry or lightly lubricated environments.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n        \u003cstrong\u003eModule 1 \/ 20-Tooth Geometry\u003c\/strong\u003e\u003cbr\u003e\n        Standard 1M tooth profile with 20° pressure angle ensures accurate, backlash-controlled meshing with any Module 1 counterpart gear or rack. 20 teeth deliver a practical pitch diameter for motor-to-output pinion stages across a wide range of gear ratios.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eEight Stepped Bore Options (4–12 mm)\u003c\/strong\u003e\u003cbr\u003e\n        The stepped bore design covers 4, 5, 6, 6.35, 7, 8, 10, and 12 mm shaft diameters — including the 6.35 mm (1\/4 in) imperial size — without adapters. Select your bore at checkout to match your motor shaft exactly.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔇\u003c\/span\u003e\n        \u003cstrong\u003eLow-Noise, Vibration-Damping Operation\u003c\/strong\u003e\u003cbr\u003e\n        Nylon's inherent elasticity absorbs gear mesh vibration and reduces operating noise compared to metal pinions — a key advantage in desktop machines, educational robots, and acoustically sensitive enclosures.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\n        \u003cstrong\u003eLightweight for Low-Inertia Drive Stages\u003c\/strong\u003e\u003cbr\u003e\n        Nylon's low density significantly reduces rotational inertia versus steel or brass equivalents, easing the load on small motors and improving dynamic response in servo-driven or battery-powered systems.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eFour Pack Quantity Options\u003c\/strong\u003e\u003cbr\u003e\n        Available in 1, 2, 5, or 10-piece packs — order a single gear for prototyping or stock up in larger quantities for production builds, classroom kits, or spare-parts inventory.\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — Module 1 Nylon Spur Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1 (1M)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003e20 mm (0.79 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003e22 mm (0.87 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (4 \/ 5 \/ 6 \/ 6.35 \/ 7 \/ 8 \/ 10 \/ 12 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eGear Width (Face Width)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eEngineering-grade nylon (PA-class polymer)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Style\u003c\/th\u003e\n\u003ctd\u003eStepped bore with hub\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eImperial Bore Option\u003c\/th\u003e\n\u003ctd\u003e6.35 mm (1\/4 in) included\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLubrication Required\u003c\/th\u003e\n\u003ctd\u003eNot required (self-lubricating); light grease optional\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eResistant to moisture, oils, and mild chemicals\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 PCS \/ 2 PCS \/ 5 PCS \/ 10 PCS (select above)\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\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I select the correct bore size for my motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or drive shaft diameter with a caliper before ordering. Available bore options are 4, 5, 6, 6.35, 7, 8, 10, and 12 mm. The 6.35 mm option fits standard 1\/4-inch imperial shafts. Select the bore that matches your shaft exactly — the stepped bore design does not allow cross-size adjustment after purchase.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear mesh with my existing Module 1 rack or spur gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. This gear uses the standard Module 1 tooth profile with a 20° pressure angle, making it fully compatible with any Module 1 (1M) spur gear, rack, or pinion regardless of material. Confirm that your mating component is also rated Module 1 before pairing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs a 20-tooth nylon gear strong enough for my drive application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEngineering-grade nylon handles light-to-medium loads well — typical for small DC motors, stepper-driven axes, and educational mechanisms. It is not recommended for high-torque or continuous heavy-duty industrial drives, where steel or brass gears are more appropriate. For most DIY and maker applications with motors in the low-to-mid watt range, nylon provides adequate strength with lower noise and weight.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes this gear require lubrication?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo regular lubrication is required — nylon is inherently self-lubricating. For high-cycle or continuous-duty use, a light application of dry PTFE spray or compatible grease on the tooth faces can extend service life. Avoid petroleum-based greases that may degrade certain nylon grades over extended contact.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this gear be used in humid or mildly corrosive environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNylon offers good resistance to moisture, mild acids, oils, and common solvents, making it suitable for humid indoor environments and light outdoor use. For prolonged outdoor exposure or submerged applications, verify compatibility with your specific conditions, as extended UV exposure can affect nylon over time.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat gear ratio can I achieve with this 20-tooth pinion?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eGear ratio equals the driven gear's tooth count divided by this pinion's 20 teeth. For example: pairing with a 40-tooth gear gives 2:1 reduction; a 60-tooth gear gives 3:1; an 80-tooth gear gives 4:1. Use this relationship to calculate the speed and torque output needed for your specific drive stage.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich pack size should I order?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe 1 PCS option suits single-axis prototyping or evaluation. The 2 PCS pack works for dual-axis or mirrored drive configurations. The 5 PCS pack is practical for small production runs or classroom kits. The 10 PCS pack offers the best per-unit value for larger builds, spare-parts stock, or multi-robot projects.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Bore size and Packing QTY 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 select the correct bore size for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or drive shaft diameter with a caliper before ordering. Available bore options are 4, 5, 6, 6.35, 7, 8, 10, and 12 mm. The 6.35 mm option fits standard 1\/4-inch imperial shafts.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing Module 1 rack or spur gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. This gear uses the standard Module 1 tooth profile with a 20\\u00b0 pressure angle, making it fully compatible with any Module 1 (1M) spur gear, rack, or pinion regardless of material.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is a 20-tooth nylon gear strong enough for my drive application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Engineering-grade nylon handles light-to-medium loads well \\u2014 typical for small DC motors, stepper-driven axes, and educational mechanisms. It is not recommended for high-torque or continuous heavy-duty industrial drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does this gear require lubrication?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No regular lubrication is required \\u2014 nylon is inherently self-lubricating. For high-cycle or continuous-duty use, a light application of dry PTFE spray or compatible grease on the tooth faces can extend service life.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this gear be used in humid or mildly corrosive environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nylon offers good resistance to moisture, mild acids, oils, and common solvents, making it suitable for humid indoor environments and light outdoor use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What gear ratio can I achieve with this 20-tooth pinion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Gear ratio equals the driven gear's tooth count divided by this pinion's 20 teeth. Pairing with a 40-tooth gear gives 2:1 reduction; a 60-tooth gear gives 3:1; an 80-tooth gear gives 4:1.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which pack size should I order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The 1 PCS option suits single-axis prototyping. The 2 PCS pack works for dual-axis configurations. The 5 PCS pack is practical for small production runs. The 10 PCS pack offers the best per-unit value for larger builds or spare-parts stock.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1M 20T \/ 4mm \/ 1 PCS","offer_id":52442824343826,"sku":"AdaahDZ32619x1","price":9.93,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 4mm \/ 2 PCS","offer_id":52442824376594,"sku":"AdaahDZ32619x2","price":15.59,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 4mm \/ 5 PCS","offer_id":52442824409362,"sku":"AdaahDZ32619x5","price":34.39,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 4mm \/ 10 PCS","offer_id":52442824442130,"sku":"AdaahDZ32619x10","price":67.58,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 5mm \/ 1 PCS","offer_id":52442824474898,"sku":"AdaahGLCDPJ00499x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 5mm \/ 2 PCS","offer_id":52442824507666,"sku":"AdaahGLCDPJ00499x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 5mm \/ 5 PCS","offer_id":52442824540434,"sku":"AdaahGLCDPJ00499x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 5mm \/ 10 PCS","offer_id":52442824573202,"sku":"AdaahGLCDPJ00499x10","price":70.71,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6mm \/ 1 PCS","offer_id":52442824605970,"sku":"AdaahGLCDPJ00500x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6mm \/ 2 PCS","offer_id":52442824638738,"sku":"AdaahGLCDPJ00500x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6mm \/ 5 PCS","offer_id":52442824671506,"sku":"AdaahGLCDPJ00500x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6mm \/ 10 PCS","offer_id":52442824704274,"sku":"AdaahGLCDPJ00500x10","price":70.71,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6.35mm \/ 1 PCS","offer_id":52442824737042,"sku":"AdaahGLCDPJ00501x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6.35mm \/ 2 PCS","offer_id":52442824769810,"sku":"AdaahGLCDPJ00501x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6.35mm \/ 5 PCS","offer_id":52442824802578,"sku":"AdaahGLCDPJ00501x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 6.35mm \/ 10 PCS","offer_id":52442824835346,"sku":"AdaahGLCDPJ00501x10","price":70.71,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 7mm \/ 1 PCS","offer_id":52442824868114,"sku":"AdaahGLCDPJ00502x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 7mm \/ 2 PCS","offer_id":52442824900882,"sku":"AdaahGLCDPJ00502x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 7mm \/ 5 PCS","offer_id":52442824933650,"sku":"AdaahGLCDPJ00502x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 7mm \/ 10 PCS","offer_id":52442824966418,"sku":"AdaahGLCDPJ00502x10","price":70.71,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 8mm \/ 1 PCS","offer_id":52442824999186,"sku":"AdaahGLCDPJ00503x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 8mm \/ 2 PCS","offer_id":52442825031954,"sku":"AdaahGLCDPJ00503x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 8mm \/ 5 PCS","offer_id":52442825064722,"sku":"AdaahGLCDPJ00503x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 8mm \/ 10 PCS","offer_id":52442825097490,"sku":"AdaahGLCDPJ00503x10","price":70.71,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 10mm \/ 1 PCS","offer_id":52442825130258,"sku":"AdaahGLCDPJ00504x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 10mm \/ 2 PCS","offer_id":52442825163026,"sku":"AdaahGLCDPJ00504x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 10mm \/ 5 PCS","offer_id":52442825195794,"sku":"AdaahGLCDPJ00504x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 10mm \/ 10 PCS","offer_id":52442825228562,"sku":"AdaahGLCDPJ00504x10","price":70.71,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 12mm \/ 1 PCS","offer_id":52442825261330,"sku":"AdaahGLCDPJ00505x1","price":10.34,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 12mm \/ 2 PCS","offer_id":52442825294098,"sku":"AdaahGLCDPJ00505x2","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 12mm \/ 5 PCS","offer_id":52442825326866,"sku":"AdaahGLCDPJ00505x5","price":35.89,"currency_code":"USD","in_stock":true},{"title":"1M 20T \/ 12mm \/ 10 PCS","offer_id":52442825359634,"sku":"AdaahGLCDPJ00505x10","price":70.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture5of8_7f74c37e-0a3a-4dd6-a506-c72327d64d75.jpg?v=1783608983","url":"https:\/\/homediyer.com\/products\/1-mod-20-teeth-blue-nylon-spur-gear-bore-4mm-12mm-pinion-plastic-gear-step","provider":"HomeDIYer","version":"1.0","type":"link"}