{"product_id":"bevel-gear-set-40cr-chrome-steel-module-1-1-5-90-degree-1-1-pairing","title":"Bevel Gear Set 40Cr Chrome Steel Module 1 1.5 90° 1:1 Pairing 15 20 25 30 Tooth","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e40Cr Bevel Gear Set — Precision 90° 1:1 Drive for Demanding DIY Applications\u003c\/h2\u003e\n\u003cp\u003eWhen your build demands a reliable right-angle power transfer without speed reduction, finding a matched bevel gear pair that holds tight tolerances under load is the real challenge. Makers, robotics builders, and mechanical engineers working on CNC machines, custom gearboxes, and motion-control rigs need gears that mesh cleanly at 90° without backlash creep or premature wear. This bevel gear set is engineered for exactly that use case.\u003c\/p\u003e\n\u003cp\u003eEach set consists of two mating bevel gears machined from 40Cr chrome alloy steel — a through-hardened material known for its tensile strength and wear resistance. Available in Module 1 and Module 1.5 standards, the gears span tooth counts of 15, 20, 25, and 30 (Module 1) and 20 teeth (Module 1.5), with bore sizes ranging from 4 mm (0.16 in) to 16 mm (0.63 in). Select bore options include a 3 mm or 4 mm keyway slot for positive shaft locking.\u003c\/p\u003e\n\u003cp\u003eTypical applications include DIY differential drives for wheeled robots, right-angle transmission stages in custom CNC router builds, compact gearbox assemblies for automation prototypes, and educational mechanical engineering projects requiring a true 1:1 bevel mesh at 90°.\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 Designed for Module 1 and Module 1.5 gear systems. Mates only with gears of the same module. Verify bore diameter and keyway requirements against your shaft spec before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 40Cr Bevel Gear Sets\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003e40Cr Chrome Alloy Steel Construction\u003c\/strong\u003e — Through-hardened chrome steel delivers the tensile strength and surface hardness needed for sustained torque transmission without deformation under cyclic loading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eTrue 90° Mesh Angle, 1:1 Ratio\u003c\/strong\u003e — Both gears in the set share the same tooth count, producing a precise 1:1 speed and torque ratio at a right angle — ideal for direction-change drives with no speed step.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eModule 1 \u0026amp; Module 1.5 Standards\u003c\/strong\u003e — Available in two metric module sizes to suit different load and space requirements. Module 1.5 gears carry higher torque for the same tooth count compared to Module 1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🕳️\u003c\/span\u003e \u003cstrong\u003eWide Bore Range with Keyway Options\u003c\/strong\u003e — Bore sizes from 4 mm to 16 mm cover the most common shaft diameters. Keyway variants (3 mm or 4 mm) provide positive rotational locking for high-torque or reversing-load applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003eMatched Pair Sold as a Set\u003c\/strong\u003e — Each purchase includes both mating bevel gears pre-matched for the same module and tooth count, eliminating the guesswork of sourcing compatible pairs separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e \u003cstrong\u003eBroad Tooth Count Selection\u003c\/strong\u003e — Choose from 15, 20, 25, or 30 teeth (Module 1) or 20 teeth (Module 1.5) to balance pitch-circle diameter, rotational inertia, and available shaft spacing in your assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Bevel Gear Set\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e40Cr Chrome Alloy Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003eModule 1 \/ Module 1.5 (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count (per gear)\u003c\/th\u003e\n\u003ctd\u003e15 \/ 20 \/ 25 \/ 30 (Module 1); 20 (Module 1.5)\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\u003eGear Ratio\u003c\/th\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 mm – 16 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway\u003c\/th\u003e\n\u003ctd\u003e3 mm or 4 mm (available on select bore sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (Module 1, 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 (Module 1, 30T)\u003c\/th\u003e\n\u003ctd\u003e30 mm (1.18 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (Module 1.5, 20T)\u003c\/th\u003e\n\u003ctd\u003e30 mm (1.18 in)\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\u003eQuantity per Set\u003c\/th\u003e\n\u003ctd\u003e2 gears (matched pair)\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\u003eHow do I choose between Module 1 and Module 1.5?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModule number defines the tooth size and pitch. Module 1.5 teeth are 50% larger than Module 1, which means they can transmit more torque for the same tooth count. Choose Module 1 for compact, light-duty builds where space is tight; choose Module 1.5 when your application involves higher loads or you need a more robust mesh. Both gears in a mating pair must be the same module — they are not interchangeable across modules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I select for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect the bore size that matches your shaft diameter exactly. Available options range from 4 mm to 16 mm. If your shaft uses a key for positive locking, choose a bore variant with the matching keyway (3 mm or 4 mm). For plain round shafts, a standard bore with a set screw or press fit is typically sufficient for light-to-medium loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a keyway, or will a plain bore work?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA plain bore is adequate for low-torque, unidirectional applications where a set screw can secure the gear. For reversing loads, high torque, or applications where slippage would cause damage, a keyway provides a positive mechanical lock between the gear and shaft. If your shaft already has a keyway cut, match the keyway width (3 mm or 4 mm) to the bore variant you select.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears compatible with other brands' bevel gears of the same module?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIn principle, metric module gears of the same module and pressure angle (typically 20°) should mesh with gears from other manufacturers. However, minor differences in tooth profile tolerances, face width, and cone angle between brands can affect mesh quality and backlash. For critical applications, we recommend using both gears from this matched set rather than mixing with other-brand gears.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are 40Cr chrome steel gears compared to mild steel or brass?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e40Cr chrome alloy steel has a significantly higher tensile strength than mild steel (typically 980–1180 MPa vs. ~400 MPa for mild steel) and far exceeds brass in load-bearing capacity. After heat treatment, 40Cr also achieves good surface hardness, which reduces tooth wear under repeated meshing. This makes it well-suited for power transmission applications that would quickly fatigue softer gear materials.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the tooth count's effect on the pitch circle diameter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor metric module gears, pitch circle diameter (PCD) = Module × Tooth Count. For Module 1 gears: 15T = 15 mm PCD, 20T = 20 mm, 25T = 25 mm, 30T = 30 mm. For Module 1.5 gears: 20T = 30 mm PCD. A larger PCD means a larger gear body, which affects the center distance between shafts and the available space in your housing. Plan your shaft spacing accordingly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears without lubrication?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eWhile 40Cr steel can run briefly without lubrication, sustained dry operation will accelerate tooth wear and generate excess heat. For any continuous-duty application, apply a suitable gear grease or oil to the mesh contact zone. Light machine oil or lithium-based grease works well for most DIY and robotics applications. Reapply lubrication periodically based on your duty cycle and operating environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Module and Bore Size above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"Module 1【15 Tooth】 \/ 4mm","offer_id":52439243194642,"sku":"PENGDZ00202x2","price":32.07,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 5mm","offer_id":52439243227410,"sku":"PENGDZ00203x2","price":32.07,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 6mm","offer_id":52439243260178,"sku":"PENGDZ00204x2","price":32.07,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 5mm","offer_id":52439243292946,"sku":"PENGDZ00205x2","price":38.6,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 6mm","offer_id":52439243325714,"sku":"PENGDZ00206x2","price":38.6,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 8mm","offer_id":52439243358482,"sku":"PENGDZ00207x2","price":38.6,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 8mm + 3mm Keyway","offer_id":52439243391250,"sku":"PENGDZ00208x2","price":41.32,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 10mm","offer_id":52439243424018,"sku":"PENGDZ00209x2","price":38.6,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 6mm","offer_id":52439243456786,"sku":"PENGDZ00210x2","price":47.46,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 8mm","offer_id":52439243489554,"sku":"PENGDZ00211x2","price":47.46,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 10mm","offer_id":52439243522322,"sku":"PENGDZ00212x2","price":47.46,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 10mm + 4mm Keyway","offer_id":52439243555090,"sku":"PENGDZ00213x2","price":50.18,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 12mm","offer_id":52439243587858,"sku":"PENGDZ00214x2","price":47.46,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 8mm","offer_id":52439243620626,"sku":"PENGDZ00215x2","price":57.91,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 10mm","offer_id":52439243653394,"sku":"PENGDZ00216x2","price":57.91,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 10mm + 4mm Keyway","offer_id":52439243686162,"sku":"PENGDZ00217x2","price":60.63,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 12mm","offer_id":52439243718930,"sku":"PENGDZ00218x2","price":57.91,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 12mm + 4mm Keyway","offer_id":52439243751698,"sku":"PENGDZ00219x2","price":60.63,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 8mm","offer_id":52439243784466,"sku":"PENGDZ00220x2","price":54.64,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 10mm","offer_id":52439243817234,"sku":"PENGDZ00221x2","price":54.64,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 10mm + 4mm Keyway","offer_id":52439243850002,"sku":"PENGDZ00222x2","price":57.36,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 12mm","offer_id":52439243882770,"sku":"PENGDZ00223x2","price":54.64,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 12mm + 4mm Keyway","offer_id":52439243915538,"sku":"PENGDZ00224x2","price":57.36,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 14mm","offer_id":52439243948306,"sku":"PENGDZ00225x2","price":54.64,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 15mm","offer_id":52439243981074,"sku":"PENGDZ00226x2","price":54.64,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 16mm","offer_id":52439244013842,"sku":"PENGDZ00227x2","price":54.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_dc71e44a-4f77-4010-891f-b3ffa20bd9c6.jpg?v=1782916558","url":"https:\/\/homediyer.com\/products\/bevel-gear-set-40cr-chrome-steel-module-1-1-5-90-degree-1-1-pairing","provider":"HomeDIYer","version":"1.0","type":"link"}