{"product_id":"1m-1-5m-2m-bevel-gear-15-20-teeth-1-1-90-meshing-angle-45-steel-drive-gear","title":"1M 1.5M 2M Bevel Gear 15 - 20 Teeth 1:1 90° Meshing Angle 45# Steel Drive Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eBevel Gear 90° Drive — Precision 45# Steel for Robotics, CNC \u0026amp; DIY Builds\u003c\/h2\u003e\n\u003cp\u003eWhen your mechanical project demands a reliable 90-degree power transmission without backlash headaches, finding the right bevel gear set can be a real challenge. Whether you're a robotics hobbyist, a CNC builder, or a mechanical engineering student, these 45# steel bevel gears deliver the dimensional accuracy and load capacity your drivetrain needs — available in multiple modules and tooth counts to match your exact design requirements.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from 45# medium-carbon steel, offering a solid balance of hardness and toughness. The range covers Module 1 (Mod 1), Module 1.5 (Mod 1.5), and Module 2 (Mod 2), with tooth counts from 15 to 20 teeth per gear. Outer diameters span approximately 16.2 mm (0.64 in) to 42.5 mm (1.67 in) depending on the selected module and tooth count. All variants are designed for a 1:1 ratio at a 90° meshing angle.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY robotic arm joints requiring a 90-degree bevel gear drive, CNC router axis change-of-direction assemblies, small automation equipment with right-angle power transmission, and educational mechanical engineering models needing a 45 steel bevel gear pair.\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 1:1 ratio, 90° meshing angle applications. Pair two gears of the same module for correct mesh. Shaft bore size — \u003cem\u003eSee variant options\u003c\/em\u003e.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 45# Steel Bevel Gears\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003e45# Medium-Carbon Steel Construction\u003c\/strong\u003e\u003cbr\u003eMachined from 45# steel for a reliable balance of surface hardness and core toughness, suitable for moderate-to-high torque right-angle drives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eMultiple Module Options (1M \/ 1.5M \/ 2M)\u003c\/strong\u003e\u003cbr\u003eThree module sizes available — select the module that matches your mating gear for correct tooth engagement and load distribution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦷\u003c\/span\u003e \u003cstrong\u003e15 to 20 Tooth Range\u003c\/strong\u003e\u003cbr\u003eChoose from 15, 16, 18, 19, or 20 teeth per gear to fine-tune your gear ratio, speed, and torque output within the 1:1 drive configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003ePrecise 90° Meshing Angle\u003c\/strong\u003e\u003cbr\u003eGround to a true 90-degree pitch cone angle, enabling smooth and accurate right-angle power transmission with minimal vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible Quantity Packs (1 \/ 2 \/ 5 Pcs)\u003c\/strong\u003e\u003cbr\u003eOrder a single gear for prototyping, a pair for a complete drive set, or a 5-piece pack for workshop stock or multi-axis builds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e \u003cstrong\u003eWide Size Range for Diverse Applications\u003c\/strong\u003e\u003cbr\u003eOuter diameters from ~16.2 mm to ~42.5 mm (0.64\"–1.67\") cover compact robotics through mid-scale CNC and automation equipment.\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\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\u003eModule Options\u003c\/th\u003e\n\u003ctd\u003e1M, 1.5M, 2M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e15, 16, 18, 19, 20 Teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeshing Angle\u003c\/th\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Ratio\u003c\/th\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter Range\u003c\/th\u003e\n\u003ctd\u003e16.2 mm – 42.5 mm (0.64\" – 1.67\")\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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e1 Pcs \/ 2 Pcs \/ 5 Pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRobotics, CNC, Automation, DIY Mechanical Builds\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 the right module size for my project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe module must match between the two mating bevel gears. Module 1 (1M) is suited for lighter loads and compact builds; Module 1.5 (1.5M) handles moderate torque; Module 2 (2M) is appropriate for heavier-duty applications. Check your existing gear or design spec for the module value before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I pair a 15-tooth gear with a 20-tooth gear for a different ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are designed for a 1:1 ratio, meaning both gears in a meshing pair should have the same tooth count and the same module. Pairing different tooth counts of the same module will alter the pitch cone geometry and is not recommended for this product series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the hardness and strength of 45# steel?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45# steel (equivalent to C45 \/ SAE 1045) typically achieves a tensile strength of approximately 600–800 MPa in the normalized condition, with surface hardness that can be further improved by heat treatment. It provides a good balance of machinability, toughness, and wear resistance for gear applications under moderate loads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bevel gears corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e45# carbon steel has limited inherent corrosion resistance. For environments with moisture or mild chemicals, we recommend applying a light machine oil coating during storage and use. If corrosion resistance is a primary requirement, consider stainless steel alternatives or apply an appropriate surface treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shaft bore diameter do these gears have?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eShaft bore diameter varies by module and tooth count. Please refer to the variant options on this page or contact us to confirm the bore size for your selected variant before ordering, especially if you need to match a specific shaft diameter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to buy two gears to complete a bevel gear drive set?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. A functional 90° bevel gear drive requires two mating gears of the same module and tooth count. The 2 Pcs quantity option is the most convenient choice for a complete pair. The 1 Pcs option is ideal if you need a replacement for an existing gear, and the 5 Pcs pack suits workshop stock or multi-axis builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the outer diameter values listed in the variants?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe outer diameter (OD) is determined by the module and tooth count: OD = (Teeth + 2) × Module. For example, a 1M 15-tooth gear has an OD of (15+2)×1 = 17mm at the pitch reference, with the actual tip diameter listed in the variant options. Always verify the OD against your housing or mounting clearance before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Modulus \u0026amp; Teeth, Outer Diameter, and Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"1Mod 15Teeth \/ 16.2mm \/ 1 Pcs","offer_id":52439306764562,"sku":"GLFBQLW2024KC00415x1","price":6.24,"currency_code":"USD","in_stock":true},{"title":"1Mod 15Teeth \/ 16.2mm \/ 2 Pcs","offer_id":52439306797330,"sku":"GLFBQLW2024KC00415x2","price":8.69,"currency_code":"USD","in_stock":true},{"title":"1Mod 15Teeth \/ 16.2mm \/ 5 Pcs","offer_id":52439306830098,"sku":"GLFBQLW2024KC00415x5","price":18.29,"currency_code":"USD","in_stock":true},{"title":"1Mod 16Teeth \/ 17.2mm \/ 1 Pcs","offer_id":52439306862866,"sku":"GLFBQLW2024KC00416x1","price":6.24,"currency_code":"USD","in_stock":true},{"title":"1Mod 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