{"product_id":"bevel-gear-3-module-ratio-1-1-teeth-20-30-bore-dia-14mm-50mm","title":"Bevel Gear 3 Module Ratio 1:1 Teeth 20 30 Bore Dia 14mm 15mm 16mm 17mm 18mm-50mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e3 Module Bevel Gear — Precision Right-Angle Power Transmission for Makers and Engineers\u003c\/h2\u003e\n\u003cp\u003eWhen your drivetrain needs to change direction without losing torque, a mismatched or low-tolerance bevel gear becomes the weakest link in your build. Whether you're designing a CNC axis, a robotic joint, or a custom gearbox, these 3 Module 1:1 ratio bevel gears give you the dimensional accuracy and material integrity to transmit power cleanly at 90°.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined to a Module 3 standard with a 1:1 ratio pairing (20T or 30T), available in bore diameters ranging from 14 mm (0.55 in) to 50 mm (1.97 in). The tooth profile follows standard involute geometry for smooth meshing engagement. Material is steel alloy, finished to a consistent surface for reliable contact under load.\u003c\/p\u003e\n\u003cp\u003eTypical applications include right-angle gearbox assemblies for CNC router Z-axis drives, bevel gear sets for robotic arm joints requiring 90° torque redirection, and custom mechanical transmission systems in industrial automation and maker projects requiring precise 1:1 speed ratio bevel gear pairing.\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 as a matched 1:1 pair (20T×20T or 30T×30T). Confirm bore diameter and shaft size before ordering. Keyway machining may be required separately.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 3 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\u003eModule 3 Involute Tooth Profile\u003c\/strong\u003e\n\u003cp\u003eStandard Module 3 geometry ensures accurate tooth engagement and interchangeability with other M3 bevel gear components in your drivetrain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eTrue 1:1 Ratio — No Speed Loss\u003c\/strong\u003e\n\u003cp\u003eMatched 20T×20T or 30T×30T pairing delivers a precise 1:1 transmission ratio, redirecting torque 90° without altering rotational speed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🕳️\u003c\/span\u003e \u003cstrong\u003eWide Bore Range: 14 mm to 50 mm\u003c\/strong\u003e\n\u003cp\u003eAvailable in 14 bore size options from 14 mm to 50 mm (0.55\"–1.97\") to fit a broad range of shaft diameters across hobby and industrial applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eSteel Alloy Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from steel alloy for the load-bearing strength and wear resistance needed in continuous-duty mechanical transmission applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eTwo Tooth Count Options\u003c\/strong\u003e\n\u003cp\u003eChoose 20T for compact, lighter-duty assemblies or 30T for larger pitch diameter and higher torque capacity — both maintain the 1:1 ratio when paired correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e \u003cstrong\u003eSold Individually — Mix and Match\u003c\/strong\u003e\n\u003cp\u003eEach unit is sold as a single gear. Order two matching tooth-count gears with your required bore sizes to complete a functional 90° bevel gear pair.\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 — 3 Module Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e3\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\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e20T \/ 30T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard involute)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e14 mm – 50 mm (0.55\" – 1.97\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Cone Angle\u003c\/th\u003e\n\u003ctd\u003e45° (1:1 ratio)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSteel Alloy\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\u003eShaft Fit\u003c\/th\u003e\n\u003ctd\u003eStraight bore (keyway: See variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Form\u003c\/th\u003e\n\u003ctd\u003eStraight bevel (involute)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc\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 select the right bore diameter for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft's outer diameter precisely with calipers. Select the bore size that matches your shaft OD. If you need a keyway or set-screw hole, that machining is typically done separately after receiving the gear. When in doubt between two sizes, choose the smaller bore — it can be bored out, but cannot be reduced.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the 20T and 30T versions?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBoth maintain a 1:1 ratio when paired with an identical tooth-count gear. The 20T gear has a smaller pitch diameter (~60 mm) making it suited for compact assemblies with moderate torque. The 30T gear has a larger pitch diameter (~90 mm), offering greater torque capacity and smoother engagement at the cost of a larger footprint. Both must be paired with the same tooth count to maintain the 1:1 ratio.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use a 20T gear with a 30T gear to get a speed reduction?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. Mixing a 20T with a 30T bevel gear of the same module will result in a 2:3 ratio, not 1:1, and the pitch cone angles will not match correctly for a 90° mesh. For a true 1:1 right-angle drive, always pair two gears with the same tooth count (20T×20T or 30T×30T).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears corrosion-resistant for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are machined from steel alloy without a specified corrosion-resistant coating. For outdoor, humid, or washdown environments, we recommend applying a suitable gear lubricant or anti-corrosion treatment after installation. If your application requires stainless steel or coated variants, please contact us to confirm availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat applications are these 3 Module bevel gears suited for?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are well-suited for CNC machine right-angle axis drives, robotic arm joints, custom gearbox assemblies, agricultural equipment, and general mechanical power transmission where a 90° direction change at a 1:1 ratio is required. The Module 3 standard makes them compatible with a wide range of off-the-shelf mechanical components.\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 pair?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Each listing is for a single gear. To create a functional 90° bevel gear drive, you need two gears of the same tooth count (e.g., two 20T gears or two 30T gears) with bore diameters matched to your respective shafts. Add two units to your cart, selecting the appropriate bore size for each shaft.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat lubrication is recommended for these bevel gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor most applications, a medium-viscosity gear oil (ISO VG 220) or a lithium-based grease applied to the tooth contact faces is recommended. Ensure the gear housing retains lubricant at the mesh point. Re-lubricate periodically based on operating load and duty cycle.\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":"3 Module 20T Bore 14mm \/ 1","offer_id":52439284384018,"sku":"PHGLFBLTYHXCDZH3398x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 15mm \/ 1","offer_id":52439284416786,"sku":"PHGLFBLTYHXCDZH3399x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 16mm \/ 1","offer_id":52439284449554,"sku":"PHGLFBLTYHXCDZH3400x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 17mm \/ 1","offer_id":52439284482322,"sku":"PHGLFBLTYHXCDZH3401x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 18mm \/ 1","offer_id":52439284515090,"sku":"PHGLFBLTYHXCDZH3402x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 19mm \/ 1","offer_id":52439284547858,"sku":"PHGLFBLTYHXCDZH3403x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 20mm \/ 1","offer_id":52439284580626,"sku":"PHGLFBLTYHXCDZH3404x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 22mm \/ 1","offer_id":52439284613394,"sku":"PHGLFBLTYHXCDZH3405x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 24mm \/ 1","offer_id":52439284646162,"sku":"PHGLFBLTYHXCDZH3406x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 25mm \/ 1","offer_id":52439284678930,"sku":"PHGLFBLTYHXCDZH3407x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 20T Bore 28mm \/ 1","offer_id":52439284711698,"sku":"PHGLFBLTYHXCDZH3408x1","price":53.68,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 20mm \/ 1","offer_id":52439284744466,"sku":"PHGLFBLTYHXCDZH3409x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 22mm \/ 1","offer_id":52439284777234,"sku":"PHGLFBLTYHXCDZH3410x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 24mm \/ 1","offer_id":52439284810002,"sku":"PHGLFBLTYHXCDZH3411x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 25mm \/ 1","offer_id":52439284842770,"sku":"PHGLFBLTYHXCDZH3412x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 28mm \/ 1","offer_id":52439284875538,"sku":"PHGLFBLTYHXCDZH3413x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 30mm \/ 1","offer_id":52439284908306,"sku":"PHGLFBLTYHXCDZH3414x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 32mm \/ 1","offer_id":52439284941074,"sku":"PHGLFBLTYHXCDZH3415x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 35mm \/ 1","offer_id":52439284973842,"sku":"PHGLFBLTYHXCDZH3416x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 40mm \/ 1","offer_id":52439285006610,"sku":"PHGLFBLTYHXCDZH3417x1","price":128.81,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 45mm \/ 1","offer_id":52439285039378,"sku":"PHGLFBLTYHXCDZH3418x1","price":132.44,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 48mm \/ 1","offer_id":52439285072146,"sku":"PHGLFBLTYHXCDZH3419x1","price":132.44,"currency_code":"USD","in_stock":true},{"title":"3 Module 30T Bore 50mm \/ 1","offer_id":52439285104914,"sku":"PHGLFBLTYHXCDZH3420x1","price":132.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_83092a62-2a68-4a87-abbd-08c4166b3040.jpg?v=1782959307","url":"https:\/\/homediyer.com\/products\/bevel-gear-3-module-ratio-1-1-teeth-20-30-bore-dia-14mm-50mm","provider":"HomeDIYer","version":"1.0","type":"link"}