{"product_id":"bevel-gear-2-5-module-ratio-1-1-teeth-20-30-bore-12mm-35mm","title":"Bevel Gear 2.5 Module Ratio 1:1 Teeth 25 30 Bore Dia 12mm 14mm 15mm 16mm - 35mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e2.5 Module Bevel Gear — Precision 1:1 Ratio Drive for Makers and Engineers\u003c\/h2\u003e\n\u003cp\u003eWhen your build demands a reliable 90-degree power transfer without backlash headaches, finding a bevel gear that fits your shaft exactly is half the battle. Whether you are a robotics hobbyist, a CNC machine builder, or a mechanical engineering student assembling a custom gearbox, a mismatched bore or imprecise tooth profile can derail hours of work. These 2.5 module bevel gears are sized and machined to give makers and DIY engineers a drop-in solution for right-angle drive applications.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from carbon steel, delivering the toughness needed for continuous rotational loads. The 2.5 module tooth profile ensures smooth meshing with a matched mating gear. Two tooth-count options are available — 20 teeth and 30 teeth — both in a 1:1 ratio configuration. Bore diameters span 12 mm (0.47 in) to 35 mm (1.38 in), covering the most common shaft sizes used in hobby and light-industrial drivetrains. Overall gear diameter ranges from approximately 55 mm (2.17 in) for the 20T variant to approximately 80 mm (3.15 in) for the 30T variant.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include right-angle gearbox assemblies for 3D printer Z-axis drives, custom conveyor corner drives, and small robotic arm joints requiring a compact 90-degree bevel gear set. The consistent 2.5 module pitch also makes these gears interchangeable with other standard metric bevel gears of the same module, simplifying sourcing for multi-stage drivetrain projects.\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 to mesh with a matching 2.5 module bevel gear of the same tooth count (sold separately). Verify shaft diameter before ordering — bore sizes range from 12 mm to 35 mm across variants.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 2.5 Module Bevel Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003ePrecise 2.5 Module Tooth Profile\u003c\/strong\u003e\n\u003cp\u003eMachined to standard metric module 2.5 specifications, ensuring accurate meshing with any compatible mating gear and minimizing noise and wear during operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003e1:1 Ratio, 90-Degree Power Transfer\u003c\/strong\u003e\n\u003cp\u003eEngineered for a true 1:1 speed ratio at a right angle, making them ideal for direction-change applications where rotational speed must remain constant across the drive axis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eWide Bore Range: 12 mm – 35 mm\u003c\/strong\u003e\n\u003cp\u003eAvailable in bore diameters from 12 mm (0.47 in) to 35 mm (1.38 in), covering the most common shaft sizes used in hobby CNC, robotics, and light-industrial machinery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e \u003cstrong\u003eTwo Tooth-Count Options: 20T and 30T\u003c\/strong\u003e\n\u003cp\u003eChoose 20 teeth for a more compact gear envelope or 30 teeth for increased load-sharing capacity and smoother torque transmission in higher-duty applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eManufactured from carbon steel for a strong strength-to-weight ratio, suitable for continuous rotational loads in enclosed or lightly lubricated gearbox environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eStandard Metric Module for Easy Sourcing\u003c\/strong\u003e\n\u003cp\u003eThe 2.5 module standard is widely used in metric drivetrain design, so these gears integrate directly with other standard-module components without custom adaptation.\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 — 2.5 Module Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e2.5\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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e20T \/ 30T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e12 mm – 35 mm (0.47 in – 1.38 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (20T)\u003c\/th\u003e\n\u003ctd\u003eApprox. 50 mm (1.97 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Diameter (30T)\u003c\/th\u003e\n\u003ctd\u003eApprox. 75 mm (2.95 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon 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\u003eShaft Angle\u003c\/th\u003e\n\u003ctd\u003e90°\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\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 the 20-tooth and 30-tooth options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 20T gear has a smaller outer diameter and is suited for compact builds where space is limited. The 30T gear distributes load across more teeth, making it a better choice for applications with higher torque or where smoother, quieter operation is a priority. Both maintain the same 1:1 ratio and 2.5 module pitch.\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 diameter that matches your shaft diameter exactly. Available bores range from 12 mm to 35 mm. If your shaft uses a keyway, check the variant options or contact us to confirm keyway dimensions before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to buy two gears to make a working bevel gear set?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. A bevel gear pair requires two matching gears — one for each shaft. Both gears must share the same module (2.5) and tooth count for a 1:1 ratio. Each listing sells individual gears; order two of the same tooth count to assemble a complete right-angle drive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears compatible with other brands' 2.5 module bevel gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, provided the mating gear shares the same module (2.5), tooth count, and pressure angle (20°). The metric module standard is internationally consistent, so these gears will mesh correctly with any conforming 2.5 module bevel gear regardless of brand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these gears, and what loads can they handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese carbon steel bevel gears are suited for light-to-medium duty applications such as robotics, hobby CNC machines, and small conveyor drives. Maximum torque capacity depends on tooth count, bore size, and operating speed. For high-cycle or heavy industrial loads, consult a mechanical engineer to verify suitability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these gears require lubrication?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor best service life, apply a light gear grease or oil to the tooth contact surfaces during assembly. In enclosed gearbox applications, a splash-lubricated environment is ideal. In open or intermittent-use setups, periodic re-greasing will extend gear life and reduce noise.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the return or exchange policy if the bore size does not fit my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePlease double-check your shaft diameter before placing your order, as bore size is a fixed dimension that cannot be modified after machining. If you receive an incorrect item due to a fulfillment error, contact us and we will arrange an exchange. For sizing questions before purchase, reach out via the contact page.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Size (Module \/ Teeth \/ Bore) and QTY above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"2.5 Module 20T Bore 12mm \/ 1","offer_id":52439283728658,"sku":"PHGLFBLTYHXCDZH3378x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 14mm \/ 1","offer_id":52439283761426,"sku":"PHGLFBLTYHXCDZH3379x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 15mm \/ 1","offer_id":52439283794194,"sku":"PHGLFBLTYHXCDZH3380x1","price":20.41,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 16mm \/ 1","offer_id":52439283826962,"sku":"PHGLFBLTYHXCDZH3381x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 17mm \/ 1","offer_id":52439283859730,"sku":"PHGLFBLTYHXCDZH3382x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 18mm \/ 1","offer_id":52439283892498,"sku":"PHGLFBLTYHXCDZH3383x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 20mm \/ 1","offer_id":52439283925266,"sku":"PHGLFBLTYHXCDZH3384x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 22mm \/ 1","offer_id":52439283958034,"sku":"PHGLFBLTYHXCDZH3385x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 24mm \/ 1","offer_id":52439283990802,"sku":"PHGLFBLTYHXCDZH3386x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 20T Bore 25mm \/ 1","offer_id":52439284023570,"sku":"PHGLFBLTYHXCDZH3387x1","price":36.57,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 15mm \/ 1","offer_id":52439284056338,"sku":"PHGLFBLTYHXCDZH3388x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 17mm \/ 1","offer_id":52439284089106,"sku":"PHGLFBLTYHXCDZH3389x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 18mm \/ 1","offer_id":52439284121874,"sku":"PHGLFBLTYHXCDZH3390x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 20mm \/ 1","offer_id":52439284154642,"sku":"PHGLFBLTYHXCDZH3391x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 22mm \/ 1","offer_id":52439284187410,"sku":"PHGLFBLTYHXCDZH3392x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 25mm \/ 1","offer_id":52439284220178,"sku":"PHGLFBLTYHXCDZH3393x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 28mm \/ 1","offer_id":52439284252946,"sku":"PHGLFBLTYHXCDZH3394x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 30mm \/ 1","offer_id":52439284285714,"sku":"PHGLFBLTYHXCDZH3395x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 32mm \/ 1","offer_id":52439284318482,"sku":"PHGLFBLTYHXCDZH3396x1","price":92.09,"currency_code":"USD","in_stock":true},{"title":"2.5 Module 30T Bore 35mm \/ 1","offer_id":52439284351250,"sku":"PHGLFBLTYHXCDZH3397x1","price":92.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-04_390205e9-3eda-4069-b267-a5a66b8229e3.jpg?v=1782958976","url":"https:\/\/homediyer.com\/products\/bevel-gear-2-5-module-ratio-1-1-teeth-20-30-bore-12mm-35mm","provider":"HomeDIYer","version":"1.0","type":"link"}