{"product_id":"2-25-modulus-bevel-gears-90-degree-1-15-ratio-keyway-motor-gear","title":"2\/ 2.5 Modulus 20\/30Tooth Bevel Gears 90° 1:1.5 Pairing With Keyway Motor Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e2\/2.5 Modulus Bevel Gears — Precise 90° Power Transmission with Keyway Drive\u003c\/h2\u003e\n\u003cp\u003eWhen your build demands a reliable right-angle drive that won't slip under load, a mismatched or keyway-free bevel gear becomes the weakest link in the entire drivetrain. Engineers, robotics builders, and machine designers who need a repeatable 1:1.5 speed ratio at a true 90° mesh angle will find these bevel gears a direct solution — available in both 2 modulus and 2.5 modulus, with 20-tooth or 30-tooth configurations to suit a wide range of torque and speed requirements.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from 45# carbon steel, offering a balance of toughness and machinability suited to mechanical power transmission. The bore diameter ranges from 12 mm (0.47 in) to 30 mm (1.18 in) depending on the variant selected, and each gear ships with a precision-cut keyway — sized 4×2 mm, 5×2.5 mm, 6×3 mm, or 8×3.5 mm — to lock the gear firmly onto the shaft and eliminate rotational slip. Gears are sold individually (1 pc per order).\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY CNC router axis drives requiring a compact right-angle gearbox, small electric motor output stages in conveyor or automation rigs, and robotics joint assemblies where a fixed 1:1.5 reduction ratio is needed between perpendicular shafts. Long-tail applications such as \"90 degree bevel gear set with keyway\" and \"metric modulus bevel gear motor coupling\" are well served by this range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Sold as individual gears — select matching modulus and tooth count for both pinion and gear to achieve the 90° \/ 1:1.5 mesh. Bore diameter and keyway size must match your shaft. Verify shaft diameter before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Bevel Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eTrue 90° Mesh Angle\u003c\/strong\u003e\n\u003cp\u003eEngineered for perpendicular shaft arrangements, delivering clean right-angle power transfer without axial thrust imbalance common in mismatched bevel pairs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔁\u003c\/span\u003e\u003cstrong\u003e1:1.5 Fixed Speed Ratio\u003c\/strong\u003e\n\u003cp\u003eThe 20-tooth \/ 30-tooth pairing produces a consistent 1:1.5 reduction ratio, useful for motor output stages where moderate speed reduction is needed without a full gearbox.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003ePrecision Keyway for Slip-Free Drive\u003c\/strong\u003e\n\u003cp\u003eEach gear includes a machined keyway (4×2 mm up to 8×3.5 mm depending on bore size), ensuring positive shaft engagement and eliminating rotational play under reversing loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\u003cstrong\u003eMultiple Modulus Options (2 \u0026amp; 2.5)\u003c\/strong\u003e\n\u003cp\u003eChoose between 2 modulus and 2.5 modulus to match your existing gear train. Larger modulus gears carry higher torque loads; smaller modulus suits compact, higher-speed applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Bore Range: 12–30 mm\u003c\/strong\u003e\n\u003cp\u003eBore diameters span 12 mm to 30 mm (0.47–1.18 in), covering common motor shaft sizes from small stepper motors up to mid-frame servo and induction motors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003e45# Carbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from 45# carbon steel for reliable strength and wear resistance in continuous-duty mechanical drives, without the brittleness of cast alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Bevel Gears\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModulus\u003c\/th\u003e\n\u003ctd\u003e2 \/ 2.5 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e20T (pinion) \/ 30T (gear) — 1:1.5 ratio pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMesh Angle\u003c\/th\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpeed Ratio\u003c\/th\u003e\n\u003ctd\u003e1:1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e12–30 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Size\u003c\/th\u003e\n\u003ctd\u003e4×2 mm \/ 5×2.5 mm \/ 6×3 mm \/ 8×3.5 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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\u003c\/tbody\u003e\n\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\n\u003csummary\u003eDo I need to buy both the pinion and the gear separately?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Each listing is for one individual gear (1 pc). To form a working 90° bevel gear pair, you need to purchase both the 20-tooth pinion and the 30-tooth gear in the same modulus. Make sure both gears share the same modulus — mixing moduli will result in incorrect mesh and premature wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose between 2 modulus and 2.5 modulus?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModulus determines tooth size and load capacity. A 2.5 modulus gear has larger, stronger teeth and handles higher torque, making it better for heavier-duty drives. A 2 modulus gear is more compact and suits higher-speed, lower-torque applications such as small CNC axes or lightweight robotics joints. Match the modulus to your existing gear train or calculate based on your torque requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore diameter and keyway size should I select?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft diameter precisely with a caliper. Select the bore that matches your shaft — a bore that is too large will cause runout even with a key fitted. The keyway size is automatically paired with the bore in the variant options. If your shaft has a pre-cut keyway, confirm the key dimensions match before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears strong enough for continuous motor drive applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are machined from 45# carbon steel, which provides solid tensile strength and wear resistance for continuous-duty mechanical drives at moderate speeds and loads. They are suitable for small-to-mid-frame motor output stages, conveyor drives, and robotics joints. For very high-speed or shock-load applications, consider whether heat treatment or a higher-alloy steel would be more appropriate for your specific duty cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the pressure angle of these bevel gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe standard pressure angle for this type of metric bevel gear is typically 20°, which is the most common for industrial and DIY mechanical drives. If your application requires specific pressure angle confirmation, please contact us before ordering to verify compatibility with your existing gear set.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these gears be used in outdoor or humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45# carbon steel is not inherently corrosion-resistant. For outdoor, humid, or washdown environments, apply a suitable gear lubricant or grease and consider a protective coating. Contact us if corrosion resistance is a primary requirement to confirm whether alternative options are available.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the 1:1.5 ratio fixed, or can I achieve other ratios with this gear set?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 1:1.5 ratio is fixed by the 20-tooth \/ 30-tooth pairing. To achieve a different ratio, you would need a different tooth count combination. Browse our other bevel gear listings or contact us for assistance selecting the right gear pair.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Types, Bore Diameter, and Keyway \u0026amp; Amount above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"2 Modulus 20Tooth \/ 12mm \/ 4*2mm \u0026 1pcs","offer_id":52439297687826,"sku":"FXLJGJXCD2384x1","price":24.34,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 20Tooth \/ 14mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297720594,"sku":"FXLJGJXCD2385x1","price":24.34,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 20Tooth \/ 15mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297753362,"sku":"FXLJGJXCD2386x1","price":24.34,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 30Tooth \/ 14mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297786130,"sku":"FXLJGJXCD2387x1","price":54.26,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 30Tooth \/ 15mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297818898,"sku":"FXLJGJXCD2388x1","price":54.26,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 30Tooth \/ 16mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297851666,"sku":"FXLJGJXCD2389x1","price":54.26,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 30Tooth \/ 18mm \/ 6*3mm \u0026 1pcs","offer_id":52439297884434,"sku":"FXLJGJXCD2390x1","price":54.26,"currency_code":"USD","in_stock":true},{"title":"2 Modulus 30Tooth \/ 20mm \/ 6*3mm \u0026 1pcs","offer_id":52439297917202,"sku":"FXLJGJXCD2391x1","price":54.26,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 20Tooth \/ 14mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297949970,"sku":"FXLJGJXCD2392x1","price":38.6,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 20Tooth \/ 15mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439297982738,"sku":"FXLJGJXCD2393x1","price":38.6,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 20Tooth \/ 16mm \/ 5*2.5mm \u0026 1pcs","offer_id":52439298015506,"sku":"FXLJGJXCD2394x1","price":38.6,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 20Tooth \/ 18mm \/ 6*3mm \u0026 1pcs","offer_id":52439298048274,"sku":"FXLJGJXCD2395x1","price":38.6,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 20Tooth \/ 20mm \/ 6*3mm \u0026 1pcs","offer_id":52439298081042,"sku":"FXLJGJXCD2396x1","price":38.6,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 18mm \/ 6*3mm \u0026 1pcs","offer_id":52439298113810,"sku":"FXLJGJXCD2397x1","price":90.28,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 20mm \/ 6*3mm \u0026 1pcs","offer_id":52439298146578,"sku":"FXLJGJXCD2398x1","price":90.28,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 22mm \/ 6*3mm \u0026 1pcs","offer_id":52439298179346,"sku":"FXLJGJXCD2399x1","price":90.28,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 24mm \/ 8*3.5mm \u0026 1pcs","offer_id":52439298212114,"sku":"FXLJGJXCD2400x1","price":90.28,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 25mm \/ 8*3.5mm \u0026 1pcs","offer_id":52439298244882,"sku":"FXLJGJXCD2401x1","price":90.28,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 28mm \/ 8*3.5mm \u0026 1pcs","offer_id":52439298277650,"sku":"FXLJGJXCD2402x1","price":90.28,"currency_code":"USD","in_stock":true},{"title":"2.5 Modulus 30Tooth \/ 30mm \/ 8*3.5mm \u0026 1pcs","offer_id":52439298310418,"sku":"FXLJGJXCD2403x1","price":90.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-02_a2c58fb0-6f27-4ac2-8791-4cdf76ce4c83.jpg?v=1783330146","url":"https:\/\/homediyer.com\/products\/2-25-modulus-bevel-gears-90-degree-1-15-ratio-keyway-motor-gear","provider":"HomeDIYer","version":"1.0","type":"link"}