{"product_id":"mod-1-15-bevel-gear-1-1-20-25-30-teeth-bore-5-15mm-90deg-45-steel","title":"1\/1.5 Mod Bevel Gear 1:1 20\/25\/30 Teeth Bore 5-15mm Transmission 90° 45# Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eMod 1 \u0026amp; 1.5 Bevel Gear Set — Precision 90° Right-Angle Power Transmission\u003c\/h2\u003e\n    \u003cp\u003eWhen a drivetrain demands a clean 90-degree direction change without sacrificing torque, engineers and makers reach for a matched bevel gear pair. These Mod 1 and Mod 1.5 bevel gears are designed for hobbyists, robotics builders, CNC enthusiasts, and light industrial designers who need a reliable 1:1 ratio right-angle transmission in a compact, machined package.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from 45# medium-carbon steel, offering a balance of machinability and mechanical strength. Available in Modulus 1 and Modulus 1.5, with tooth counts of 20, 25, or 30, and bore diameters ranging from 5 mm (0.197 in) to 15 mm (0.591 in). The 90-degree mating angle is held to standard bevel gear geometry for consistent mesh across the full tooth range.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include DIY gearbox builds requiring a 90° shaft redirection, robotics joint drives where a compact bevel pair replaces a worm stage, and light-duty automation fixtures needing a matched Mod 1 bevel gear set for right-angle power transmission in confined enclosures.\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 Pairs with any matching Modulus (1 or 1.5) bevel gear of the same tooth count. Bore accepts standard keyed or plain shafts from 5 mm to 15 mm. Confirm shaft diameter before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These Mod 1 \u0026amp; 1.5 Bevel Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003e45# Medium-Carbon Steel Construction\u003c\/strong\u003e — Machined from 45# steel for a solid combination of tensile strength and ease of secondary machining, suitable for moderate-load drivetrain applications.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eTrue 90° Mating Angle\u003c\/strong\u003e — Ground to standard bevel gear geometry, ensuring smooth mesh and minimal backlash when paired with a matching gear of the same modulus and tooth count.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\n        \u003cstrong\u003e1:1 Transmission Ratio\u003c\/strong\u003e — Equal tooth counts on both mating gears deliver a direct 1:1 speed and torque ratio, ideal for direction-change applications without speed reduction.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eWide Bore Range (5–15 mm)\u003c\/strong\u003e — Eight bore diameter options from 5 mm to 15 mm (0.197–0.591 in) accommodate a broad range of shaft sizes, reducing the need for custom adapters.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔢\u003c\/span\u003e\n        \u003cstrong\u003eThree Tooth Count Options\u003c\/strong\u003e — Choose 20, 25, or 30 teeth to match your pitch circle diameter requirements and available envelope space within your assembly.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\n        \u003cstrong\u003eTwo Modulus Options (1 \u0026amp; 1.5)\u003c\/strong\u003e — Mod 1 suits finer-pitch, lighter-load applications; Mod 1.5 provides a larger tooth profile for increased load capacity and easier assembly alignment.\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — Bevel Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Medium-Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eModulus\u003c\/th\u003e\n\u003ctd\u003e1 \/ 1.5 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e20 \/ 25 \/ 30 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTransmission Ratio\u003c\/th\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Angle\u003c\/th\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e5 \/ 6 \/ 6.35 \/ 8 \/ 10 \/ 12 \/ 14 \/ 15 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Circle Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eKeyway\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRight-angle power transmission, robotics, DIY gearboxes, light 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 between Modulus 1 and Modulus 1.5?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eModulus (or Module) defines the tooth size. Mod 1 has smaller teeth suited for lighter loads and tighter spaces, while Mod 1.5 has larger teeth that handle higher torque and are easier to align during assembly. Both mating gears in a pair must share the same modulus — you cannot mix Mod 1 with Mod 1.5.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo both gears in the pair need to have the same tooth count?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. For a 1:1 ratio, both the drive and driven bevel gears must have the same tooth count (e.g., both 20T, both 25T, or both 30T). Mismatching tooth counts will change the transmission ratio and alter the mesh geometry.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich bore diameter should I select for my shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSelect the bore diameter that matches your shaft's outer diameter. Available options are 5, 6, 6.35, 8, 10, 12, 14, and 15 mm. If your shaft is imperial (e.g., 1\/4 in = 6.35 mm), choose the 6.35 mm bore. For a keyed shaft, verify whether a keyway is required and contact us to confirm keyway availability for your chosen variant.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong are these bevel gears under load?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are machined from 45# medium-carbon steel, which typically has a tensile strength of approximately 600–800 MPa depending on heat treatment. They are suitable for moderate-load applications such as robotics joints, DIY gearboxes, and light automation. For heavy industrial loads or continuous high-speed operation, consult a mechanical engineer to verify suitability.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears corrosion-resistant?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# steel has moderate corrosion resistance. For environments with moisture or mild chemicals, applying a light machine oil or grease to the gear teeth and bore is recommended. For highly corrosive environments, consider stainless steel alternatives or apply a protective coating after installation.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these gears in a 3D-printed or hobby robotics project?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Mod 1 and Mod 1.5 bevel gears are widely used in hobby robotics, RC vehicles, and DIY automation projects. The 5 mm and 6 mm bore options are particularly popular for pairing with standard hobby servo output shafts and small stepper motor shafts. Ensure your motor's torque rating is within the gear's load capacity for your application.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need to purchase gears in pairs?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach listing is sold as a single gear. To complete a 90° right-angle drive, you need two matching gears of the same modulus and tooth count — one for the drive shaft and one for the driven shaft. Add two units to your cart, or contact us if you need assistance selecting a matched pair.\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 Modulus, Number of Teeth, and Bore Diameter above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"1 Modulus \/ 20 Teeth \/ 5mm","offer_id":52439252402450,"sku":"QTLJGLBZSJ073562x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 20 Teeth \/ 6mm","offer_id":52439252435218,"sku":"QTLJGLBZSJ073563x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 20 Teeth \/ 6.35mm","offer_id":52439252467986,"sku":"QTLJGLBZSJ073564x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 20 Teeth \/ 8mm","offer_id":52439252500754,"sku":"QTLJGLBZSJ073565x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 25 Teeth \/ 6mm","offer_id":52439252533522,"sku":"QTLJGLBZSJ073566x1","price":14.04,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 25 Teeth \/ 8mm","offer_id":52439252566290,"sku":"QTLJGLBZSJ073567x1","price":14.04,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 25 Teeth \/ 10mm","offer_id":52439252599058,"sku":"QTLJGLBZSJ073568x1","price":14.04,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 25 Teeth \/ 12mm","offer_id":52439252631826,"sku":"QTLJGLBZSJ073569x1","price":14.04,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 30 Teeth \/ 6mm","offer_id":52439252664594,"sku":"QTLJGLBZSJ073570x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 30 Teeth \/ 8mm","offer_id":52439252697362,"sku":"QTLJGLBZSJ073571x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 30 Teeth \/ 10mm","offer_id":52439252730130,"sku":"QTLJGLBZSJ073572x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"1 Modulus \/ 30 Teeth \/ 12mm","offer_id":52439252762898,"sku":"QTLJGLBZSJ073573x1","price":17.9,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 20 Teeth \/ 6mm","offer_id":52439252795666,"sku":"QTLJGLBZSJ073574x1","price":16.4,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 20 Teeth \/ 6.35mm","offer_id":52439252828434,"sku":"QTLJGLBZSJ073575x1","price":16.4,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 20 Teeth \/ 8mm","offer_id":52439252861202,"sku":"QTLJGLBZSJ073576x1","price":15.72,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 20 Teeth \/ 10mm","offer_id":52439252893970,"sku":"QTLJGLBZSJ073577x1","price":16.4,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 20 Teeth \/ 12mm","offer_id":52439252926738,"sku":"QTLJGLBZSJ073578x1","price":16.4,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 25 Teeth \/ 8mm","offer_id":52439252959506,"sku":"QTLJGLBZSJ073579x1","price":21.35,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 25 Teeth \/ 10mm","offer_id":52439252992274,"sku":"QTLJGLBZSJ073580x1","price":21.35,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 25 Teeth \/ 12mm","offer_id":52439253025042,"sku":"QTLJGLBZSJ073581x1","price":21.35,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 25 Teeth \/ 14mm","offer_id":52439253057810,"sku":"QTLJGLBZSJ073582x1","price":21.35,"currency_code":"USD","in_stock":true},{"title":"1.5 Modulus \/ 25 Teeth \/ 15mm","offer_id":52439253090578,"sku":"QTLJGLBZSJ073583x1","price":21.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-04_f27524d2-9554-4563-a0e0-4d6dbc0da196.jpg?v=1782919076","url":"https:\/\/homediyer.com\/products\/mod-1-15-bevel-gear-1-1-20-25-30-teeth-bore-5-15mm-90deg-45-steel","provider":"HomeDIYer","version":"1.0","type":"link"}