{"product_id":"transmission-spur-gears-1-5modulus-15-30tooth-bore-6-12mm-plastic-convex-gears","title":"Transmission Spur Gears 1.5Modulus 15-30Tooth Bore 6-12mm Plastic Convex Gears","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e1.5 Modulus Plastic Spur Gears — Precision Transmission for DIY Builds\u003c\/h2\u003e\n\u003cp\u003eWhen your robotics project, 3D printer gearbox, or RC drivetrain demands reliable torque transfer without the weight penalty of metal, finding the right plastic spur gear in the exact tooth count and bore diameter can be a frustrating hunt. These 1.5 modulus convex spur gears are engineered for makers, hobbyists, and engineers who need a broad selection of sizes in a single, dependable product line.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from engineering-grade plastic (typically nylon or POM\/Delrin), offering a balance of low friction, moderate load capacity, and corrosion resistance. The gear range covers 15 to 30 teeth across multiple bore diameters from 6 mm (0.24 in) to 16 mm (0.63 in), with outer diameters scaling proportionally from approximately 25.5 mm (1.00 in) for 15T up to 48 mm (1.89 in) for 30T at 1.5 modulus.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY gearbox assemblies for small robotics and automation rigs, replacement transmission gears for desktop 3D printers and CNC feeders, and lightweight drive components for RC car and boat drivetrains where plastic spur gear weight savings matter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e Compatible with standard 1.5 modulus gear systems. Verify tooth count, bore diameter, and face width against your shaft and mating gear before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 1.5 Modulus Plastic Spur Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eWide Model Range\u003c\/strong\u003e — 15T through 30T tooth counts with bore options from 6 mm to 16 mm, covering the most common DIY and light-industrial shaft sizes in a single product line.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🪶\u003c\/span\u003e\u003cstrong\u003eLightweight Engineering Plastic\u003c\/strong\u003e — Constructed from engineering-grade plastic (nylon or POM), delivering low rotational inertia and self-lubricating properties that reduce noise and wear in continuous-duty applications.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Material\u003c\/strong\u003e — Unlike steel gears, the plastic construction resists moisture, mild chemicals, and oxidation, making these gears suitable for humid workshop environments and outdoor RC builds.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eStandard 1.5 Modulus Profile\u003c\/strong\u003e — Machined to the ISO\/DIN 1.5 modulus standard, ensuring direct interchangeability with other 1.5 Mod gears and racks in your existing drivetrain.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eConvex Tooth Profile\u003c\/strong\u003e — The convex gear face geometry improves tooth contact distribution, reducing stress concentration and extending service life compared to flat-face equivalents under cyclic loading.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003ePrecision Bore Sizing\u003c\/strong\u003e — Bores are machined to close tolerances (typically H7 fit) for a secure shaft fit. Available bore diameters: 6, 8, 10, 12, 14, 15, and 16 mm depending on tooth count variant.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 1.5 Modulus Plastic Spur Gear\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModulus\u003c\/th\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e15T, 16T, 18T, 20T, 22T, 24T, 25T, 28T, 30T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e6 mm – 16 mm (0.24 in – 0.63 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003e25.5 mm – 48 mm (1.00 in – 1.89 in), varies by tooth count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFace Width (approx.)\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 plastic (nylon or POM\/Delrin)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eConvex spur (standard involute)\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 Fit Tolerance\u003c\/th\u003e\n\u003ctd\u003eTypically H7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eSpur Gear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I choose the right tooth count for my application?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe gear ratio between two meshing spur gears equals the ratio of their tooth counts. For example, pairing a 15T drive gear with a 30T driven gear gives a 2:1 reduction. Determine your required speed reduction or multiplication first, then select tooth counts that achieve that ratio while fitting within your available space envelope.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhich bore diameter should I select?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your shaft diameter with a caliper and select the matching bore. For a secure press or keyed fit, choose a bore equal to your shaft diameter. If you plan to use a set screw or locking collar, a bore that matches the shaft exactly (H7 tolerance) is recommended. Not all bore sizes are available for every tooth count — check the variant options for your chosen tooth count.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these gears strong enough for my robotics or RC project?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEngineering plastic gears (nylon\/POM) are well-suited for light-to-moderate torque applications such as small robotics, 3D printer drives, and RC transmissions. They are not recommended for high-torque industrial machinery or applications with sustained shock loading. If your application exceeds the plastic's load capacity, consider metal spur gears instead.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill these gears corrode or degrade outdoors?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNylon and POM plastics are inherently corrosion-resistant and will not rust. They can handle moderate moisture and mild chemical exposure. Prolonged UV exposure may cause slight surface degradation over time; for long-term outdoor use, consider shielding the gears from direct sunlight or applying a UV-protective coating.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these compatible with metal spur gears of the same modulus?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Any two gears with the same modulus and pressure angle will mesh correctly regardless of material, provided the tooth counts and center distance are matched. These 1.5 Mod plastic gears will mesh with 1.5 Mod metal gears. Note that pairing plastic with metal may accelerate wear on the plastic gear under heavy loads.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need to lubricate these plastic gears?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ePOM (Delrin) is self-lubricating and typically runs dry. Nylon also has low friction properties but can benefit from a light application of dry PTFE lubricant or white lithium grease in high-cycle applications. Avoid petroleum-based oils that may swell or degrade certain plastics over time.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between the tooth counts available — how does it affect gear size?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAt 1.5 modulus, the pitch diameter equals the tooth count multiplied by the modulus (e.g., 20T × 1.5 = 30 mm pitch diameter). More teeth means a larger gear diameter. Choose a higher tooth count when you need a larger driven gear for speed reduction, or a lower tooth count for a compact drive pinion.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e\u003cp\u003e🛒 Select your tooth count and bore diameter above, then add to cart.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I choose the right tooth count for my application?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The gear ratio between two meshing spur gears equals the ratio of their tooth counts. For example, pairing a 15T drive gear with a 30T driven gear gives a 2:1 reduction. Determine your required speed reduction or multiplication first, then select tooth counts that achieve that ratio while fitting within your available space envelope.\"}},{\"@type\":\"Question\",\"name\":\"Which bore diameter should I select?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Measure your shaft diameter with a caliper and select the matching bore. For a secure press or keyed fit, choose a bore equal to your shaft diameter. If you plan to use a set screw or locking collar, a bore that matches the shaft exactly (H7 tolerance) is recommended. Not all bore sizes are available for every tooth count — check the variant options for your chosen tooth count.\"}},{\"@type\":\"Question\",\"name\":\"Are these gears strong enough for my robotics or RC project?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Engineering plastic gears (nylon\/POM) are well-suited for light-to-moderate torque applications such as small robotics, 3D printer drives, and RC transmissions. They are not recommended for high-torque industrial machinery or applications with sustained shock loading.\"}},{\"@type\":\"Question\",\"name\":\"Will these gears corrode or degrade outdoors?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Nylon and POM plastics are inherently corrosion-resistant and will not rust. They can handle moderate moisture and mild chemical exposure. Prolonged UV exposure may cause slight surface degradation over time.\"}},{\"@type\":\"Question\",\"name\":\"Are these compatible with metal spur gears of the same modulus?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Any two gears with the same modulus and pressure angle will mesh correctly regardless of material. These 1.5 Mod plastic gears will mesh with 1.5 Mod metal gears. Note that pairing plastic with metal may accelerate wear on the plastic gear under heavy loads.\"}},{\"@type\":\"Question\",\"name\":\"Do I need to lubricate these plastic gears?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"POM (Delrin) is self-lubricating and typically runs dry. Nylon also has low friction properties but can benefit from a light application of dry PTFE lubricant or white lithium grease in high-cycle applications.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between the tooth counts available — how does it affect gear size?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"At 1.5 modulus, the pitch diameter equals the tooth count multiplied by the modulus (e.g., 20T × 1.5 = 30 mm pitch diameter). More teeth means a larger gear diameter. Choose a higher tooth count when you need a larger driven gear for speed reduction, or a lower tooth count for a compact drive pinion.\"}}]}\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Spur Gear \/ 1.5Mod-15T,Bore6","offer_id":52442378633490,"sku":"GLFBJTTJGJXCD2179x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-15T,Bore8","offer_id":52442378666258,"sku":"GLFBJTTJGJXCD2180x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-15T,Bore10","offer_id":52442378699026,"sku":"GLFBJTTJGJXCD2181x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-15T,Bore12","offer_id":52442378731794,"sku":"GLFBJTTJGJXCD2182x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-16T,Bore6","offer_id":52442378764562,"sku":"GLFBJTTJGJXCD2183x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-16T,Bore8","offer_id":52442378797330,"sku":"GLFBJTTJGJXCD2184x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-16T,Bore10","offer_id":52442378830098,"sku":"GLFBJTTJGJXCD2185x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-16T,Bore12","offer_id":52442378862866,"sku":"GLFBJTTJGJXCD2186x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-18T,Bore6","offer_id":52442378895634,"sku":"GLFBJTTJGJXCD2187x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-18T,Bore8","offer_id":52442378928402,"sku":"GLFBJTTJGJXCD2188x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-18T,Bore10","offer_id":52442378961170,"sku":"GLFBJTTJGJXCD2189x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-18T,Bore12","offer_id":52442378993938,"sku":"GLFBJTTJGJXCD2190x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore6","offer_id":52442379026706,"sku":"GLFBJTTJGJXCD2191x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore8","offer_id":52442379059474,"sku":"GLFBJTTJGJXCD2192x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore10","offer_id":52442379092242,"sku":"GLFBJTTJGJXCD2193x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore12","offer_id":52442379125010,"sku":"GLFBJTTJGJXCD2194x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore14","offer_id":52442379157778,"sku":"GLFBJTTJGJXCD2195x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore15","offer_id":52442379190546,"sku":"GLFBJTTJGJXCD2196x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-20T,Bore16","offer_id":52442379223314,"sku":"GLFBJTTJGJXCD2197x1","price":14.93,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-22T,Bore6","offer_id":52442379256082,"sku":"GLFBJTTJGJXCD2198x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-22T,Bore8","offer_id":52442379288850,"sku":"GLFBJTTJGJXCD2199x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-22T,Bore10","offer_id":52442379321618,"sku":"GLFBJTTJGJXCD2200x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-22T,Bore12","offer_id":52442379354386,"sku":"GLFBJTTJGJXCD2201x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-24T,Bore6","offer_id":52442379387154,"sku":"GLFBJTTJGJXCD2202x1","price":16.29,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-24T,Bore8","offer_id":52442379419922,"sku":"GLFBJTTJGJXCD2203x1","price":16.18,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-24T,Bore10","offer_id":52442379452690,"sku":"GLFBJTTJGJXCD2204x1","price":16.18,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-24T,Bore12","offer_id":52442379485458,"sku":"GLFBJTTJGJXCD2205x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-25T,Bore6","offer_id":52442379518226,"sku":"GLFBJTTJGJXCD2206x1","price":16.46,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-25T,Bore8","offer_id":52442379550994,"sku":"GLFBJTTJGJXCD2207x1","price":16.46,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-25T,Bore10","offer_id":52442379583762,"sku":"GLFBJTTJGJXCD2208x1","price":16.29,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-25T,Bore12","offer_id":52442379616530,"sku":"GLFBJTTJGJXCD2209x1","price":16.29,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-28T,Bore6","offer_id":52442379649298,"sku":"GLFBJTTJGJXCD2210x1","price":19.28,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-28T,Bore8","offer_id":52442379682066,"sku":"GLFBJTTJGJXCD2211x1","price":19.28,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-28T,Bore10","offer_id":52442379714834,"sku":"GLFBJTTJGJXCD2212x1","price":19.18,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-28T,Bore12","offer_id":52442379747602,"sku":"GLFBJTTJGJXCD2213x1","price":19.01,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-30T,Bore6","offer_id":52442379780370,"sku":"GLFBJTTJGJXCD2214x1","price":19.83,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-30T,Bore8","offer_id":52442379813138,"sku":"GLFBJTTJGJXCD2215x1","price":19.72,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-30T,Bore10","offer_id":52442379845906,"sku":"GLFBJTTJGJXCD2216x1","price":19.72,"currency_code":"USD","in_stock":true},{"title":"Spur Gear \/ 1.5Mod-30T,Bore12","offer_id":52442379878674,"sku":"GLFBJTTJGJXCD2217x1","price":19.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_ccfcdcc6-8b64-4308-80bd-8f62cb5f416f.jpg?v=1783494437","url":"https:\/\/homediyer.com\/products\/transmission-spur-gears-1-5modulus-15-30tooth-bore-6-12mm-plastic-convex-gears","provider":"HomeDIYer","version":"1.0","type":"link"}