{"product_id":"1m-steel-helical-bevel-gear-15-40-tooth","title":"1 Module Steel Umbrella Tooth Bevel Gear Helical Motor Gear 15-40 Tooth","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e1 Module Steel Helical Bevel Gear — Precision Motion for CNC, Robotics \u0026amp; Motor Drives\u003c\/h2\u003e\n    \u003cp\u003eWhen your motion-control build demands reliable torque transfer at an angle, a mismatched or worn bevel gear becomes the weakest link in the entire drivetrain. Engineers, makers, and small-batch manufacturers working on CNC routers, robotic arms, conveyor systems, and motorized fixtures need a gear that holds tight tolerances run after run — without backlash creep or premature wear.\u003c\/p\u003e\n    \u003cp\u003eThese 1 Module (1M) steel helical bevel gears are machined from carbon steel with a smooth helical tooth profile. The tooth count spans 15T to 40T, with corresponding outer diameters ranging from approximately 16.2 mm (0.638 in) for the 15T up to 41.2 mm (1.622 in) for the 40T. Each gear features a standard 1M pitch, making cross-sourcing and replacement straightforward.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include right-angle power transmission in desktop CNC spindle heads, bevel gear pairs in DIY 3D-printer extruder gearboxes, and angular drive stages in automated camera sliders or pick-and-place machines — anywhere a compact, steel helical bevel gear for motor shaft is required.\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 (1M) pitch system. Pairs with any 1M bevel gear of matching or complementary tooth count. Bore diameter varies by tooth count — see variant options for shaft fit confirmation.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 1M Steel Helical Bevel Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e — Machined from carbon steel for reliable strength and wear resistance across continuous-duty motion-control applications.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌀\u003c\/span\u003e\u003cstrong\u003eHelical Tooth Profile\u003c\/strong\u003e — Angled teeth engage progressively, reducing impact noise and vibration compared to straight-cut bevel gears under load.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eModule 1 Standard Pitch\u003c\/strong\u003e — 1M pitch is a globally recognized metric gear standard, ensuring straightforward pairing with compatible 1M bevel gear sets.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Size Range (15T–40T)\u003c\/strong\u003e — Ten tooth-count options from 15T (OD 16.2 mm \/ 0.638 in) to 40T (OD 41.2 mm \/ 1.622 in) cover most compact right-angle drive requirements.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eRight-Angle Power Transmission\u003c\/strong\u003e — Designed for 90° shaft intersections, enabling compact angular drive layouts in robotics, automation, and DIY CNC builds.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Available in 1, 4, 8, or 10-piece packs so you can stock spares or outfit a full multi-axis system in a single order.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — Helical Bevel Gears\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1M (Metric Module 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e15T, 16T, 18T, 20T, 22T, 24T, 25T, 30T, 35T, 40T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter Range\u003c\/th\u003e\n\u003ctd\u003e16.2 mm – 41.2 mm (0.638 in – 1.622 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Type\u003c\/th\u003e\n\u003ctd\u003eHelical (umbrella tooth \/ bevel)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Bore 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\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Angle\u003c\/th\u003e\n\u003ctd\u003e45° (standard bevel pair)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 pcs \/ 4 pcs \/ 8 pcs \/ 10 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eCNC, robotics, motor drives, 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\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 and available space. For a 1:1 right-angle drive, pair two gears of the same tooth count (e.g., 20T × 20T). For a speed or torque reduction, pair different counts — for example, a 15T driving a 30T gives a 2:1 reduction. Check the outer diameter against your housing clearance before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat shaft bore diameter does each gear have?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBore diameter varies by tooth count and is listed in the variant detail. Please check the variant options or contact us to confirm the bore size matches your motor or shaft diameter before purchasing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears strong enough for continuous-duty motor applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The carbon steel construction provides solid load-bearing capacity for typical small-motor and servo applications found in CNC routers, robotic joints, and automation fixtures. For very high-torque or high-RPM industrial drives, verify the rated torque against your system requirements.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo these gears resist corrosion?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCarbon steel offers good mechanical strength but has moderate corrosion resistance. For environments with moisture or mild chemicals, apply a light machine oil or grease to the tooth surfaces. For highly corrosive environments, consider stainless steel alternatives.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I pair a 15T gear with a 40T gear for a large reduction ratio?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — as long as both gears share the same module (1M) and the pitch angle is compatible (standard 45° bevel pair). A 15T\/40T pairing gives approximately a 2.67:1 ratio. Confirm center distance and housing geometry accommodate the size difference between the two gears.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between a helical bevel gear and a straight bevel gear?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eHelical bevel gears have angled (spiral) teeth that engage gradually across the tooth face, resulting in smoother, quieter operation and higher load capacity compared to straight bevel gears. They are preferred in applications where noise reduction and smooth torque delivery matter, such as precision CNC axes and robotic joints.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow many pieces do I need for a complete right-angle drive pair?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA standard right-angle bevel gear drive requires two gears — one on each intersecting shaft. Order at least 2 pieces (or a 4-pack for spares). If you are building multiple axes or want backup gears on hand, the 8-pack or 10-pack options offer better per-unit value.\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 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 and available space. For a 1:1 right-angle drive, pair two gears of the same tooth count. For a speed or torque reduction, pair different counts — for example, a 15T driving a 30T gives a 2:1 reduction.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shaft bore diameter does each gear have?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bore diameter varies by tooth count. Please check the variant options or contact us to confirm the bore size matches your motor or shaft diameter before purchasing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears strong enough for continuous-duty motor applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The carbon steel construction provides solid load-bearing capacity for typical small-motor and servo applications found in CNC routers, robotic joints, and automation fixtures.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do these gears resist corrosion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carbon steel offers good mechanical strength but moderate corrosion resistance. Apply a light machine oil or grease to the tooth surfaces in moist environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I pair a 15T gear with a 40T gear for a large reduction ratio?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — as long as both gears share the same module (1M) and compatible pitch angle. A 15T\/40T pairing gives approximately a 2.67:1 ratio.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between a helical bevel gear and a straight bevel gear?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Helical bevel gears have angled teeth that engage gradually, resulting in smoother, quieter operation and higher load capacity compared to straight bevel gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many pieces do I need for a complete right-angle drive pair?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A standard right-angle bevel gear drive requires two gears — one on each intersecting shaft. Order at least 2 pieces, or a 4-pack for spares.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1M 15T (D16.2mm) \/ 1pcs","offer_id":52439923065106,"sku":"YULESHXJZC1855x1","price":5.51,"currency_code":"USD","in_stock":true},{"title":"1M 16T (D17.2mm) \/ 1pcs","offer_id":52439923097874,"sku":"YULESHXJZC1856x1","price":5.51,"currency_code":"USD","in_stock":true},{"title":"1M 18T (D19.2mm) \/ 1pcs","offer_id":52439923130642,"sku":"YULESHXJZC1857x1","price":5.7,"currency_code":"USD","in_stock":true},{"title":"1M 20T (D21.2mm) \/ 1pcs","offer_id":52439923163410,"sku":"YULESHXJZC1858x1","price":5.7,"currency_code":"USD","in_stock":true},{"title":"1M 22T (D23.2mm) \/ 1pcs","offer_id":52439923196178,"sku":"YULESHXJZC1859x1","price":6.11,"currency_code":"USD","in_stock":true},{"title":"1M 24T (D25.2mm) \/ 1pcs","offer_id":52439923228946,"sku":"YULESHXJZC1860x1","price":6.32,"currency_code":"USD","in_stock":true},{"title":"1M 25T (D26.2mm) \/ 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