{"product_id":"mod-1-helical-gear-45-left-hand-13-26-tooth-motor-pinion-bore-6-16mm-nylon-blue","title":"Mod 1 Helical Gear 45° Left-hand 13-26 Tooth Motor Pinion Bore 6-16mm Nylon Blue","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eMod 1 Nylon Helical Gear — Quiet, Low-Backlash Motion for CNC \u0026amp; Robotics\u003c\/h2\u003e\n    \u003cp\u003eEngineers and makers who need smooth, low-noise power transmission often struggle to find gears that fit compact motor shafts without custom machining. These Module 1 nylon helical gears are designed for builders of CNC routers, robotic arms, 3D printer extruder drives, and small automation rigs who demand consistent mesh quality and reduced vibration in tight spaces.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of light weight, self-lubrication, and corrosion resistance. The 45° left-hand helix angle delivers axial load distribution for quieter operation compared to spur gears. Tooth counts range from 13 to 26 teeth (Module 1), with bore options spanning 6 mm to 16 mm (approximately 0.24 in to 0.63 in) to suit a wide range of motor pinion shafts.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include stepper motor pinion drives in desktop CNC machines, servo-driven axis geartrains in robotic joints, and paired helical gear sets in small conveyor or indexing mechanisms — all applications where a nylon helical motor pinion gear with a precise bore fit reduces noise and extends service life.\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 Module 1 (Mod 1) pitch system · 45° left-hand helix · Bore 6 \/ 8 \/ 10 \/ 12 \/ 14 \/ 15 \/ 16 mm · Pairs with Module 1 right-hand helical gears or matching rack\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These Mod 1 Nylon Helical Gears\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🔵\u003c\/span\u003e\n      \u003cstrong\u003e45° Left-Hand Helix Angle\u003c\/strong\u003e\n      \u003cp\u003eDistributes tooth load across the face width for smoother engagement, reduced impact noise, and lower vibration versus straight spur gears.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n      \u003cstrong\u003eMultiple Bore Sizes (6–16 mm)\u003c\/strong\u003e\n      \u003cp\u003eSeven bore options — 6, 8, 10, 12, 14, 15, and 16 mm — let you match the gear directly to your motor shaft without a bushing adapter.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\n      \u003cstrong\u003eFour Tooth Count Options (13–26T)\u003c\/strong\u003e\n      \u003cp\u003eChoose 13, 15, 20, or 26 teeth to dial in your gear ratio for torque multiplication or speed increase in your drivetrain.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🧱\u003c\/span\u003e\n      \u003cstrong\u003eEngineering Nylon Construction\u003c\/strong\u003e\n      \u003cp\u003ePA-grade nylon provides self-lubrication, chemical resistance, and low density — ideal for dry-running or lightly lubricated environments.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n      \u003cstrong\u003eFlexible Pack Quantities (1–5 pcs)\u003c\/strong\u003e\n      \u003cp\u003eOrder 1 to 5 pieces per variant to prototype with a single gear or stock spares for production runs without overpaying for bulk minimums.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n      \u003cstrong\u003eModule 1 Standard Pitch\u003c\/strong\u003e\n      \u003cp\u003eFully compatible with the international Module 1 gear standard, ensuring interchangeability with other Mod 1 components in your system.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — Mod 1 Helical Gear\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule (Pitch)\u003c\/th\u003e\n\u003ctd\u003eModule 1 (Mod 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHelix Angle\u003c\/th\u003e\n\u003ctd\u003e45° Left-Hand\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e13T \/ 15T \/ 20T \/ 26T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Size Options\u003c\/th\u003e\n\u003ctd\u003e6 mm \/ 8 mm \/ 10 mm \/ 12 mm \/ 14 mm \/ 15 mm \/ 16 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eEngineering Nylon (PA-grade)\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\u003ePitch Diameter (13T)\u003c\/th\u003e\n\u003ctd\u003e13 mm (0.51 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter (15T)\u003c\/th\u003e\n\u003ctd\u003e15 mm (0.59 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter (20T)\u003c\/th\u003e\n\u003ctd\u003e20 mm (0.79 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Diameter (26T)\u003c\/th\u003e\n\u003ctd\u003e26 mm (1.02 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFace Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHub Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 4 \/ 5 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eCNC, robotics, automation, 3D printer drives\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 choose the right tooth count for my application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSelect the tooth count based on your required gear ratio. Pair a 13T pinion with a larger driven gear for torque multiplication, or use a 26T pinion with a smaller gear for speed increase. For a 1:1 ratio, use matching tooth counts on both gears. Always verify the center distance matches your housing design.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich bore size should I order for my motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft diameter with calipers and select the matching bore: 6, 8, 10, 12, 14, 15, or 16 mm. The bore is a close-tolerance fit. If your shaft uses a keyway or set screw, confirm the hub wall thickness is sufficient for your fastening method before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this left-hand helical gear mesh with a right-hand helical gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — for parallel-axis helical gear pairs, a left-hand gear meshes with a right-hand gear of the same module and helix angle. Ensure both gears share the same Module 1 pitch and 45° helix angle for correct engagement. Do not pair with spur gears or different-module gears.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs nylon strong enough for my CNC or robotics application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEngineering nylon (PA-grade) handles moderate loads well in dry or lightly lubricated conditions. It is well-suited for stepper and servo motor pinion drives in desktop CNC, 3D printer extruders, and light robotic joints. For heavy-load or high-temperature environments (above ~80–100 °C continuous), consider metal gears instead.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDoes nylon resist corrosion and moisture?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNylon offers good resistance to oils, greases, and many common chemicals. It is inherently corrosion-free, unlike steel gears. Note that nylon can absorb moisture over time, which may cause slight dimensional changes. For high-humidity environments, allow for this in your tolerance stack-up or use a sealed housing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need lubrication for these nylon helical gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNylon is self-lubricating and can run dry in many light-duty applications. For extended service life under continuous or higher-speed operation, a light application of PTFE-based or silicone grease is recommended. Avoid petroleum-based greases that may degrade nylon over time.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between Module 1 and other gear modules?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe module number defines the ratio of pitch diameter to tooth count (Module = Pitch Diameter ÷ Tooth Count, in mm). Module 1 gears have a 1 mm pitch diameter per tooth — a common standard for small motors and precision drives. Gears of different modules cannot mesh together; always confirm your mating gear is also Module 1.\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 Models (tooth count), Bore Size, 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 application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Select the tooth count based on your required gear ratio. Pair a 13T pinion with a larger driven gear for torque multiplication, or use a 26T pinion with a smaller gear for speed increase. For a 1:1 ratio, use matching tooth counts on both gears. Always verify the center distance matches your housing design.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore size should I order for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor shaft diameter with calipers and select the matching bore: 6, 8, 10, 12, 14, 15, or 16 mm. The bore is a close-tolerance fit. If your shaft uses a keyway or set screw, confirm the hub wall thickness is sufficient for your fastening method before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this left-hand helical gear mesh with a right-hand helical gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — for parallel-axis helical gear pairs, a left-hand gear meshes with a right-hand gear of the same module and helix angle. Ensure both gears share the same Module 1 pitch and 45° helix angle for correct engagement.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is nylon strong enough for my CNC or robotics application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Engineering nylon (PA-grade) handles moderate loads well in dry or lightly lubricated conditions. It is well-suited for stepper and servo motor pinion drives in desktop CNC, 3D printer extruders, and light robotic joints. For heavy-load or high-temperature environments (above ~80–100 °C continuous), consider metal gears instead.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does nylon resist corrosion and moisture?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nylon offers good resistance to oils, greases, and many common chemicals. It is inherently corrosion-free. Note that nylon can absorb moisture over time, which may cause slight dimensional changes.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need lubrication for these nylon helical gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Nylon is self-lubricating and can run dry in many light-duty applications. For extended service life, a light application of PTFE-based or silicone grease is recommended. Avoid petroleum-based greases that may degrade nylon over time.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between Module 1 and other gear modules?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The module number defines the ratio of pitch diameter to tooth count. Module 1 gears have a 1 mm pitch diameter per tooth — a common standard for small motors and precision drives. Gears of different modules cannot mesh together; always confirm your mating gear is also Module 1.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Module 1【13 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52439936827666,"sku":"PENGJGJXCD2615x1","price":10.32,"currency_code":"USD","in_stock":true},{"title":"Module 1【13 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439936860434,"sku":"PENGJGJXCD2616x1","price":10.32,"currency_code":"USD","in_stock":true},{"title":"Module 1【13 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439936893202,"sku":"PENGJGJXCD2617x1","price":10.32,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52439936925970,"sku":"PENGJGJXCD2618x1","price":10.32,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439936958738,"sku":"PENGJGJXCD2619x1","price":10.32,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 10mm \/ 1 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