{"product_id":"module-1-1-5-2-bevel-gear-c45-steel-gear-ratio-1-3-15-45-tooth-hardened-black","title":"Module 1 1.5 2 Bevel Gear C45 Steel Gear Ratio 1:3 15-45 Tooth Hardened Black","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eC45 Steel Bevel Gear — Precision 1:3 Ratio Drive for Makers and Builders\u003c\/h2\u003e\n\u003cp\u003eWhen your project demands a reliable 90-degree power transfer without slop or chatter, finding a bevel gear that fits your shaft and holds up under load is the real challenge. These C45 steel bevel gears are engineered for makers, robotics builders, CNC hobbyists, and mechanical engineers who need a drop-in drivetrain component that performs consistently across repeated cycles.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from C45 medium-carbon steel and finished with a hardened black surface treatment for wear resistance. Available in three module sizes — Module 1, Module 1.5, and Module 2 — with either 15-tooth (pinion) or 45-tooth (wheel) configurations, forming a fixed 1:3 gear ratio pair. Bore sizes range from 6 mm (0.24 in) to 25 mm (0.98 in), with keyway options available on larger bores for positive shaft engagement.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include right-angle gearbox assemblies for DIY CNC machines, custom conveyor drives requiring a 3:1 speed reduction, robotic arm joints needing compact 90-degree torque transmission, and small-scale industrial automation prototypes where a hardened bevel gear set reduces backlash and extends service life.\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 standard metric shaft diameters. Keyway variants require a matching keyway cut on the shaft. Confirm module size and bore diameter before ordering — Module 1, 1.5, and 2 gears are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e with each other.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These C45 Steel Bevel Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eC45 Medium-Carbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from C45 steel for a balance of machinability and mechanical strength, delivering reliable torque transmission in both light-duty and moderate-load applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚫\u003c\/span\u003e \u003cstrong\u003eHardened Black Surface Finish\u003c\/strong\u003e\n\u003cp\u003eThe blackening treatment increases surface hardness and corrosion resistance, extending gear life in environments with occasional moisture or debris exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eThree Module Sizes — One Consistent 1:3 Ratio\u003c\/strong\u003e\n\u003cp\u003eAvailable in Module 1, 1.5, and 2 to suit different torque and speed requirements. Each module pairs a 15-tooth pinion with a 45-tooth wheel for a fixed 3:1 reduction ratio.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔑\u003c\/span\u003e \u003cstrong\u003eKeyway Bore Options for Positive Shaft Lock\u003c\/strong\u003e\n\u003cp\u003eLarger bore variants include a precision-cut keyway (4 mm, 5 mm, 6 mm, or 8 mm depending on bore size) to prevent shaft slippage under torque — critical for high-cycle or reversing-load applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eWide Bore Range: 6 mm to 25 mm\u003c\/strong\u003e\n\u003cp\u003eBore options span 6 mm through 25 mm (0.24–0.98 in), covering the most common metric shaft sizes used in hobby CNC, robotics, and small automation builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003e90-Degree Power Transmission\u003c\/strong\u003e\n\u003cp\u003eBevel gear geometry enables smooth right-angle torque transfer, making these gears ideal for changing drive direction in compact mechanical assemblies without additional shafting.\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 Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eStraight Bevel Gear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eC45 Medium-Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Treatment\u003c\/th\u003e\n\u003ctd\u003eHardened Black (Blackening)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModule Options\u003c\/th\u003e\n\u003ctd\u003eModule 1 \/ Module 1.5 \/ Module 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count (Pinion)\u003c\/th\u003e\n\u003ctd\u003e15 Tooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count (Wheel)\u003c\/th\u003e\n\u003ctd\u003e45 Tooth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Ratio\u003c\/th\u003e\n\u003ctd\u003e1:3\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\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e6 mm – 25 mm (0.24 – 0.98 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Options\u003c\/th\u003e\n\u003ctd\u003e4 mm \/ 5 mm \/ 6 mm \/ 8 mm (bore-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter 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\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc (single gear)\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\u003eModule size determines the physical tooth size and the overall gear diameter. Module 1 gears are the smallest and suit light-load, high-speed applications. Module 1.5 is a mid-range option for moderate torque. Module 2 gears are larger and handle heavier loads. Match the module to your torque requirement and the space available in your assembly — gears of different modules cannot mesh together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to buy both the pinion (15T) and the wheel (45T) to get the 1:3 ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 1:3 gear ratio is achieved by pairing the 15-tooth pinion with the 45-tooth wheel. Both gears must be the same module size to mesh correctly. You can order each separately and select the matching module and bore size for each shaft in your assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore size should I select, and when do I need a keyway?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect the bore size that matches your shaft diameter. For light-duty or low-torque applications, a plain bore with a set screw is often sufficient. If your application involves high torque, reversing loads, or frequent start-stop cycles, choose a keyway bore variant — the keyway provides a positive mechanical lock between the gear and shaft, preventing rotational slippage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are C45 steel bevel gears compared to cast iron or stainless steel?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eC45 steel offers higher tensile strength and toughness than cast iron, making it more resistant to impact and shock loads. Compared to stainless steel, C45 has similar or higher hardness after heat treatment but lower corrosion resistance in wet environments. The hardened black finish on these gears adds a layer of surface protection suitable for most indoor and semi-protected outdoor applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears corrosion-resistant? Can I use them in damp environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe blackening (hardened black) surface treatment provides moderate corrosion resistance — sufficient for dry indoor use and occasional moisture exposure. For continuously wet, submerged, or chemically aggressive environments, additional lubrication or a protective coating is recommended. These gears are not rated for marine or food-grade applications without further treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these bevel gears in a CNC machine or robotics project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These gears are well-suited for DIY CNC right-angle drives, robotic arm joints, and custom automation builds. Select the module size that matches your torque and speed requirements, choose a bore that fits your motor or drive shaft, and use a keyway variant for any axis that experiences reversing loads or high duty cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat lubrication do you recommend for these bevel gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA light gear grease or lithium-based grease applied to the tooth faces is recommended for most applications. For high-speed, low-load setups, a light machine oil can also be used. Re-lubricate periodically based on your duty cycle — more frequent lubrication is needed in dusty or high-temperature environments to maintain smooth meshing and extend gear life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Module size, Bore Size, and Amount 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】 \/ 6mm \/ 1 pcs","offer_id":52439242375442,"sku":"PENGDZ00155x1","price":13.23,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439242408210,"sku":"PENGDZ00156x1","price":13.23,"currency_code":"USD","in_stock":true},{"title":"Module 1【45 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439242440978,"sku":"PENGDZ00157x1","price":24.72,"currency_code":"USD","in_stock":true},{"title":"Module 1【45 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439242473746,"sku":"PENGDZ00158x1","price":24.72,"currency_code":"USD","in_stock":true},{"title":"Module 1【45 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52439242506514,"sku":"PENGDZ00159x1","price":24.72,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439242539282,"sku":"PENGDZ00160x1","price":12.38,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439242572050,"sku":"PENGDZ00161x1","price":12.38,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【45 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439242604818,"sku":"PENGDZ00162x1","price":62.8,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【45 Tooth】 \/ 12mm + 4mm Keyway \/ 1 pcs","offer_id":52439242637586,"sku":"PENGDZ00163x1","price":62.8,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【45 Tooth】 \/ 14mm + 5mm Keyway \/ 1 pcs","offer_id":52439242670354,"sku":"PENGDZ00164x1","price":62.8,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【45 Tooth】 \/ 15mm + 5mm Keyway \/ 1 pcs","offer_id":52439242703122,"sku":"PENGDZ00165x1","price":62.8,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【45 Tooth】 \/ 16mm + 5mm Keyway \/ 1 pcs","offer_id":52439242735890,"sku":"PENGDZ00166x1","price":62.8,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439242768658,"sku":"PENGDZ00167x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52439242801426,"sku":"PENGDZ00168x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 12mm + 4mm Keyway \/ 1 pcs","offer_id":52439242834194,"sku":"PENGDZ00169x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 14mm \/ 1 pcs","offer_id":52439242866962,"sku":"PENGDZ00170x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Module 2【15 Tooth】 \/ 15mm \/ 1 pcs","offer_id":52439242899730,"sku":"PENGDZ00171x1","price":16.02,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 14mm + 5mm Keyway \/ 1 pcs","offer_id":52439242932498,"sku":"PENGDZ00172x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 15mm + 5mm Keyway \/ 1 pcs","offer_id":52439242965266,"sku":"PENGDZ00173x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 16mm + 5mm Keyway \/ 1 pcs","offer_id":52439242998034,"sku":"PENGDZ00174x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 18mm + 6mm Keyway \/ 1 pcs","offer_id":52439243030802,"sku":"PENGDZ00175x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 20mm + 6mm Keyway \/ 1 pcs","offer_id":52439243063570,"sku":"PENGDZ00176x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 22mm + 6mm Keyway \/ 1 pcs","offer_id":52439243096338,"sku":"PENGDZ00177x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 24mm + 8mm Keyway \/ 1 pcs","offer_id":52439243129106,"sku":"PENGDZ00178x1","price":114.21,"currency_code":"USD","in_stock":true},{"title":"Module 2【45 Tooth】 \/ 25mm + 8mm Keyway \/ 1 pcs","offer_id":52439243161874,"sku":"PENGDZ00179x1","price":114.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_3c88333f-6916-479e-88ac-1e4c81e3d254.jpg?v=1782916392","url":"https:\/\/homediyer.com\/products\/module-1-1-5-2-bevel-gear-c45-steel-gear-ratio-1-3-15-45-tooth-hardened-black","provider":"HomeDIYer","version":"1.0","type":"link"}