{"product_id":"helical-gear-stainless-steel-mod-1-5-45-left-hand-10-13-15-tooth-motor-pinion","title":"Helical Gear Stainless Steel Mod 1,5 45° Left-hand 10\/13\/15 Tooth Motor Pinion","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eStainless Steel Helical Gear Mod 1.5 — Precision Left-Hand Motor Pinion for CNC and Automation\u003c\/h2\u003e\n\u003cp\u003eWhen backlash, noise, and misalignment cost you accuracy, engineers and makers building CNC routers, robotic arms, and motor-driven assemblies need a gear they can rely on. These Module 1.5 left-hand helical gears are designed for motion-control builders who demand smooth, quiet power transmission without compromise.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from stainless steel, offering corrosion resistance and structural rigidity across the full range. Available in 10, 13, and 15 tooth counts with a 45° left-hand helix angle. Bore sizes range from 8 mm (0.31 in) to 15 mm (0.59 in), with keyway options (4 mm and 5 mm) available on select bore sizes for positive shaft engagement.\u003c\/p\u003e\n\u003cp\u003eTypical applications include motor pinion drives in CNC gantry systems, paired left-right helical gear sets for zero-axial-thrust configurations, and compact reduction stages in robotics and automation equipment where quiet operation and precise tooth engagement are critical.\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 to mesh with Module 1.5 right-hand helical gears of matching helix angle. Verify bore diameter and keyway dimensions against your shaft spec before ordering. Suitable for stepper and servo motor pinion applications.\n\u003c\/div\u003e\n\n\u003ch2\u003e✅ Key Features of These Stainless Steel Helical Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cstrong\u003eModule 1.5 Tooth Profile\u003c\/strong\u003e\n\u003cp\u003eStandardized Mod 1.5 pitch ensures direct interchangeability with matching helical gear sets and simplifies gear ratio calculations for your drivetrain.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n\u003cstrong\u003e45° Left-Hand Helix Angle\u003c\/strong\u003e\n\u003cp\u003eThe 45° left-hand helix delivers smooth, progressive tooth engagement that reduces vibration and noise compared to spur gears — ideal for paired helical configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🛡️\u003c\/div\u003e\n\u003cstrong\u003eStainless Steel Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from stainless steel for corrosion resistance in humid, washdown, or outdoor environments where carbon steel gears would degrade over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cstrong\u003eMultiple Bore and Keyway Options\u003c\/strong\u003e\n\u003cp\u003eChoose from 8 mm plain bore, 10 mm plain bore, or keyway-equipped bores (10 mm + 4 mm, 12 mm + 4 mm, 14 mm + 5 mm, 15 mm + 5 mm) to match your shaft and torque requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚡\u003c\/div\u003e\n\u003cstrong\u003eMotor Pinion Ready\u003c\/strong\u003e\n\u003cp\u003eCompact 10, 13, and 15 tooth counts are sized for direct motor shaft mounting, making these gears a natural fit for stepper and servo motor pinion stages in CNC and robotics builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n\u003cstrong\u003eKeyway for Positive Drive\u003c\/strong\u003e\n\u003cp\u003eKeyway bore variants eliminate shaft slip under load, providing a mechanically positive connection that set-screw-only bores cannot match in high-cycle or high-torque applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003ch2\u003e📐 Technical Specifications — Helical Gear\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHelix Angle\u003c\/th\u003e\n\u003ctd\u003e45°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHand\u003c\/th\u003e\n\u003ctd\u003eLeft-hand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e10T \/ 13T \/ 15T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Size Options\u003c\/th\u003e\n\u003ctd\u003e8 mm, 10 mm, 10 mm + 4 mm Keyway, 12 mm + 4 mm Keyway, 14 mm + 5 mm Keyway, 15 mm + 5 mm Keyway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (10T)\u003c\/th\u003e\n\u003ctd\u003e15 mm (0.59 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (13T)\u003c\/th\u003e\n\u003ctd\u003e19.5 mm (0.77 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (15T)\u003c\/th\u003e\n\u003ctd\u003e22.5 mm (0.89 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° (standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural stainless (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pcs\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\u003eTooth count determines your gear ratio and pitch diameter. The 10-tooth pinion gives the highest reduction ratio when paired with a larger driven gear, making it suitable for high-torque, lower-speed motor outputs. The 13T and 15T options reduce the ratio and increase pitch diameter, which can improve load distribution. Calculate your required ratio first, then select the tooth count that achieves it with your chosen mating gear.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a keyway bore, or will a plain bore work?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor light-duty or low-cycle applications, a plain bore secured with a set screw is often sufficient. For motor pinion use — especially with stepper or servo motors running continuous cycles or reversing loads — a keyway bore provides a mechanically positive connection that prevents rotational slip under torque spikes. If your shaft has a keyway machined in, always match it with a keyway bore gear.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between left-hand and right-hand helical gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eLeft-hand and right-hand refer to the direction the teeth spiral around the gear. To mesh correctly, a left-hand gear must pair with a right-hand gear on parallel shafts. These gears are left-hand (LH); ensure your mating gear is right-hand (RH) with the same module (1.5) and helix angle (45°) for proper engagement.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears corrosion resistant for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Stainless steel provides good corrosion resistance in humid, lightly wet, and outdoor environments. For continuous immersion or exposure to aggressive chemicals, verify the specific stainless grade is compatible with your environment. The natural uncoated finish requires no additional treatment for typical workshop or light industrial use.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWill these gears mesh with standard Module 1.5 spur gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo. Helical gears with a 45° helix angle cannot mesh with spur gears (0° helix). They must be paired with a Module 1.5 helical gear of the same helix angle and opposite hand. Mixing helical and spur gears of the same module will result in incorrect tooth contact and rapid wear.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I verify the bore size fits my motor shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft diameter with a caliper. Select the bore size that matches — for example, an 8 mm shaft takes the 8 mm bore, a 10 mm shaft takes the 10 mm or 10 mm + 4 mm keyway bore. If your shaft has a keyway, measure the keyway width (typically 3–5 mm) and select the matching keyway bore option. Contact us to confirm if you are unsure.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these as a matched pair for zero axial thrust?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Pairing a left-hand helical gear with a right-hand helical gear of the same module, tooth count, and helix angle on parallel shafts produces opposing axial thrust forces that cancel each other out — a common technique in precision gearboxes to eliminate net axial load on bearings. Ensure both gears are the same tooth count and module for a 1:1 ratio, or select different tooth counts for a reduction stage.\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, 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\": \"Tooth count determines your gear ratio and pitch diameter. The 10-tooth pinion gives the highest reduction ratio when paired with a larger driven gear, making it suitable for high-torque, lower-speed motor outputs. The 13T and 15T options reduce the ratio and increase pitch diameter, which can improve load distribution.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need a keyway bore, or will a plain bore work?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For light-duty or low-cycle applications, a plain bore secured with a set screw is often sufficient. For motor pinion use with continuous cycles or reversing loads, a keyway bore provides a mechanically positive connection that prevents rotational slip under torque spikes.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between left-hand and right-hand helical gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Left-hand and right-hand refer to the direction the teeth spiral around the gear. To mesh correctly, a left-hand gear must pair with a right-hand gear on parallel shafts. These gears are left-hand (LH); ensure your mating gear is right-hand (RH) with the same module (1.5) and helix angle (45°).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears corrosion resistant for outdoor or wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Stainless steel provides good corrosion resistance in humid, lightly wet, and outdoor environments. The natural uncoated finish requires no additional treatment for typical workshop or light industrial use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will these gears mesh with standard Module 1.5 spur gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. Helical gears with a 45° helix angle cannot mesh with spur gears. They must be paired with a Module 1.5 helical gear of the same helix angle and opposite hand.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I verify the bore size fits my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor shaft diameter with a caliper. Select the bore size that matches. If your shaft has a keyway, measure the keyway width and select the matching keyway bore option.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these as a matched pair for zero axial thrust?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Pairing a left-hand helical gear with a right-hand helical gear of the same module, tooth count, and helix angle on parallel shafts produces opposing axial thrust forces that cancel each other out — a common technique in precision gearboxes.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Module 1.5【10 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439931388178,"sku":"PENGJGJXCD4257x1","price":29.04,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【10 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439931420946,"sku":"PENGJGJXCD4258x1","price":28.76,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【13 Tooth】 \/ 10mm + 4mm Keyway \/ 1 pcs","offer_id":52439931453714,"sku":"PENGJGJXCD4259x1","price":37.11,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【13 Tooth】 \/ 12mm + 4mm Keyway \/ 1 pcs","offer_id":52439931486482,"sku":"PENGJGJXCD4260x1","price":36.79,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 10mm + 4mm Keyway \/ 1 pcs","offer_id":52439931519250,"sku":"PENGJGJXCD4261x1","price":43.64,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 12mm + 4mm Keyway \/ 1 pcs","offer_id":52439931552018,"sku":"PENGJGJXCD4262x1","price":43.32,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 14mm + 5mm Keyway \/ 1 pcs","offer_id":52439931584786,"sku":"PENGJGJXCD4263x1","price":42.96,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 15mm + 5mm Keyway \/ 1 pcs","offer_id":52439931617554,"sku":"PENGJGJXCD4264x1","price":42.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture4of9_51873a86-6640-4a3a-a1c1-6f9840801632.jpg?v=1783523466","url":"https:\/\/homediyer.com\/products\/helical-gear-stainless-steel-mod-1-5-45-left-hand-10-13-15-tooth-motor-pinion","provider":"HomeDIYer","version":"1.0","type":"link"}