{"product_id":"mod-bevel-gear-1-2-ratio-90-degree-steel-transmission-gears","title":"1\/1.5\/2\/2.5\/3 Mod Bevel Gear 1:2 15 Tooth - 54 Tooth Transmission Gears 90°Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e90° Steel Bevel Gear Pairs — Precision 1:2 Ratio 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 set becomes the weakest link in your build. These 90° steel bevel gear pairs are engineered for makers, robotics builders, CNC hobbyists, and mechanical engineering students who need reliable right-angle power transmission in a compact, repeatable package.\u003c\/p\u003e\n\u003cp\u003eEach set consists of a matched pinion and wheel gear pair machined from 45# carbon steel, hardened for wear resistance. Available in modulus values of 1.5 Mod, 2 Mod, 2.5 Mod, and 3 Mod, with tooth count combinations ranging from 15T+30T up to 18T+54T (1:2 gear ratio throughout). Bore diameters and face widths vary by modulus — see variant options for exact dimensional data.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include right-angle gearbox assemblies for DIY CNC router Z-axis drives, custom robotic arm joints requiring a 2:1 speed reduction, and educational mechanical engineering demonstration rigs where a precise 90° mesh angle is required.\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 bevel gear shafts. Bore diameter varies by modulus — confirm shaft size against your selected variant before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 90° Steel Bevel Gear Pairs\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003e45# Carbon Steel Construction\u003c\/strong\u003e — Machined from medium-carbon steel for a balance of machinability, surface hardness, and tensile strength suited to moderate-load drivetrain applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003ePrecise 90° Mesh Angle\u003c\/strong\u003e — Each pair is manufactured to a true 90° shaft angle, ensuring smooth, low-backlash engagement when mounted on perpendicular shafts in your gearbox housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e \u003cstrong\u003eFixed 1:2 Gear Ratio\u003c\/strong\u003e — Pinion and wheel tooth counts are always in a 1:2 relationship (e.g., 15T drives 30T), delivering a consistent 2:1 speed reduction and torque multiplication across all variants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eMatched Pair Sold Together\u003c\/strong\u003e — Each order includes one pinion gear and one wheel gear, pre-selected as a matched set to guarantee correct modulus and tooth-count compatibility between the two mating gears.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔢\u003c\/span\u003e \u003cstrong\u003eMultiple Modulus Options (1.5 – 3 Mod)\u003c\/strong\u003e — Choose from four modulus values to match your existing gear train pitch. Larger modulus = larger tooth profile = higher load capacity per tooth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e \u003cstrong\u003eBroad Tooth Count Range\u003c\/strong\u003e — Tooth combinations from 15T+30T to 18T+54T let you select the physical gear diameter that fits your housing envelope while maintaining the 1:2 ratio throughout.\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 Pairs\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003e90° Bevel Gear Pair (Pinion + Wheel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Ratio\u003c\/th\u003e\n\u003ctd\u003e1:2\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\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Modulus\u003c\/th\u003e\n\u003ctd\u003e1.5 Mod \/ 2 Mod \/ 2.5 Mod \/ 3 Mod\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count (Pinion + Wheel)\u003c\/th\u003e\n\u003ctd\u003e15T+30T \/ 16T+32T \/ 18T+36T \/ 20T+40T \/ 15T+45T \/ 16T+48T \/ 18T+54T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore 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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard metric)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eMachined, natural steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 Pair (2 Pcs — 1 pinion + 1 wheel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRight-angle power transmission, robotics, CNC, DIY gearboxes\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 modulus for my project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModulus (Mod) defines the tooth size and pitch diameter of the gear. A higher modulus means larger, stronger teeth capable of transmitting more torque, but also a physically larger gear. Match the modulus to your existing gear train — if you already have 2 Mod gears on your shaft, select 2 Mod here. If you are designing from scratch, choose based on your load requirements and available housing space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the gear ratio, and what does 1:2 mean for my build?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAll variants in this listing maintain a fixed 1:2 gear ratio — the pinion (smaller gear) has half the teeth of the wheel (larger gear). This means for every two rotations of the pinion, the wheel completes one rotation. The result is a 2× torque increase on the output shaft with a corresponding 2× reduction in output speed. This is useful for applications where you need more turning force at lower RPM.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears strong enough for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are machined from 45# carbon steel, which offers good tensile strength and surface hardness for moderate-load applications such as robotics joints, light CNC axes, and educational rigs. For heavy industrial loads or continuous high-torque operation, we recommend consulting a mechanical engineer to verify the gear's rated load capacity against your specific torque and speed requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these gears rust or corrode over time?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe gears are machined from carbon steel with a natural steel finish and do not include a corrosion-resistant coating. For use in humid or outdoor environments, we recommend applying a light machine oil or grease to the gear teeth and bore surfaces. If corrosion resistance is a primary requirement, consider stainless steel or brass gear alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shaft diameter do these gears fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBore diameter varies by modulus and tooth count. Please check the specific variant's bore dimension before ordering to confirm compatibility with your shaft. If you need a custom bore size, standard machining operations (reaming or boring) can be performed on carbon steel gears by a local machine shop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to buy the pinion and wheel separately?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo — each order includes one matched pair: one pinion gear and one wheel gear. The two gears are pre-selected to share the same modulus and maintain the 1:2 tooth ratio, so they will mesh correctly straight out of the box. Simply select your desired modulus and tooth count combination above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears with imperial (inch) shaft systems?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are metric module gears designed for metric shaft systems. While the bore can be machined to an imperial dimension, the tooth profile (module pitch) is not compatible with imperial diametral pitch (DP) gears. Do not attempt to mesh these gears with DP-standard gears — the tooth profiles will not engage correctly and will cause rapid wear or damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Modulus and Number of Teeth above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"1.5 Mod \/ 15T + 30T \/ 1 Pair（2 Pcs)","offer_id":52439259742482,"sku":"QTLJJGJXCD0043x1","price":44.2,"currency_code":"USD","in_stock":true},{"title":"1.5 Mod \/ 18T + 36T \/ 1 Pair（2 Pcs)","offer_id":52439259775250,"sku":"QTLJJGJXCD0045x1","price":73.03,"currency_code":"USD","in_stock":true},{"title":"1.5 Mod \/ 20T + 40T \/ 1 Pair（2 Pcs)","offer_id":52439259808018,"sku":"QTLJJGJXCD0046x1","price":56.28,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 15T + 30T \/ 1 Pair（2 Pcs)","offer_id":52439259840786,"sku":"QTLJJGJXCD0047x1","price":68.24,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 16T + 32T \/ 1 Pair（2 Pcs)","offer_id":52439259873554,"sku":"QTLJJGJXCD0048x1","price":74.77,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 18T + 36T \/ 1 Pair（2 Pcs)","offer_id":52439259906322,"sku":"QTLJJGJXCD0049x1","price":99.42,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 20T + 40T \/ 1 Pair（2 Pcs)","offer_id":52439259939090,"sku":"QTLJJGJXCD0050x1","price":114.65,"currency_code":"USD","in_stock":true},{"title":"2.5 Mod \/ 15T + 30T \/ 1 Pair（2 Pcs)","offer_id":52439259971858,"sku":"QTLJJGJXCD0051x1","price":99.8,"currency_code":"USD","in_stock":true},{"title":"2.5 Mod \/ 16T + 32T \/ 1 Pair（2 Pcs)","offer_id":52439260004626,"sku":"QTLJJGJXCD0052x1","price":114.65,"currency_code":"USD","in_stock":true},{"title":"2.5 Mod \/ 18T + 36T \/ 1 Pair（2 Pcs)","offer_id":52439260037394,"sku":"QTLJJGJXCD0053x1","price":125.91,"currency_code":"USD","in_stock":true},{"title":"2.5 Mod \/ 20T + 40T \/ 1 Pair（2 Pcs)","offer_id":52439260070162,"sku":"QTLJJGJXCD0054x1","price":140.32,"currency_code":"USD","in_stock":true},{"title":"3 Mod \/ 15T + 30T \/ 1 Pair（2 Pcs)","offer_id":52439260102930,"sku":"QTLJJGJXCD0055x1","price":171.77,"currency_code":"USD","in_stock":true},{"title":"3 Mod \/ 18T + 36T \/ 1 Pair（2 Pcs)","offer_id":52439260135698,"sku":"QTLJJGJXCD0056x1","price":323.82,"currency_code":"USD","in_stock":true},{"title":"3 Mod \/ 20T + 40T \/ 1 Pair（2 Pcs)","offer_id":52439260168466,"sku":"QTLJJGJXCD0057x1","price":331.7,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 15T + 45T \/ 1 Pair（2 Pcs)","offer_id":52439260201234,"sku":"QTLJJGJXCD0058x1","price":141.96,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 16T + 48T \/ 1 Pair（2 Pcs)","offer_id":52439260234002,"sku":"QTLJJGJXCD0059x1","price":169.7,"currency_code":"USD","in_stock":true},{"title":"2 Mod \/ 18T + 54T \/ 1 Pair（2 Pcs)","offer_id":52439260266770,"sku":"QTLJJGJXCD0060x1","price":184.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-03_cf593153-1e0f-46bf-9007-d272c75dba4a.jpg?v=1782920734","url":"https:\/\/homediyer.com\/products\/mod-bevel-gear-1-2-ratio-90-degree-steel-transmission-gears","provider":"HomeDIYer","version":"1.0","type":"link"}