{"product_id":"1-mod-bevel-gear-20t-25t-30t-bore-5-12mm-metal-transmission-gear","title":"1 Mod Bevel Gear 20T\/25T\/30T Bore 5-12mm 90°1:1 Pairing Metal Transmission Gear","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e1 Mod Bevel Gear — Precision 90° Power Transmission for DIY and Mechanical Builds\u003c\/h2\u003e\n\u003cp\u003eWhen your drive system needs to change direction without losing torque, a mismatched or imprecise bevel gear becomes the weakest link in the chain. Engineers, robotics builders, and hands-on makers who demand reliable 90° power transfer need a gear that holds tight tolerances and pairs cleanly — every time. These 1 Mod bevel gears are designed for exactly that.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from metal (typically steel or brass alloy) with a module of 1 and a pressure angle of 20°. Available in 20T, 25T, and 30T tooth counts, with bore diameters ranging from 5mm to 12mm (approximately 0.20\" to 0.47\"). The 90° 1:1 mating configuration means same-tooth-count pairs mesh directly for equal-ratio direction changes.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CNC router axis drives, RC vehicle differentials, desktop robotic arm joints, and custom gearbox assemblies where a compact 90° bevel gear set for 5mm shaft or 12mm bore shaft 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 to pair with same-module (Mod 1), same-tooth-count bevel gears at 90°. Verify bore diameter matches your shaft size before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 1 Mod Bevel Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚙️ \u003cstrong\u003eTrue 90° Meshing Geometry\u003c\/strong\u003e\u003cbr\u003eEngineered for accurate 1:1 right-angle power transmission — no ratio loss, no angular deviation.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩 \u003cstrong\u003eMultiple Tooth Count Options\u003c\/strong\u003e\u003cbr\u003eChoose 20T, 25T, or 30T to match your torque and speed requirements across different drive configurations.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📏 \u003cstrong\u003eWide Bore Range: 5–12mm\u003c\/strong\u003e\u003cbr\u003eBore options from 5mm to 12mm (0.20\"–0.47\") accommodate a broad range of shaft diameters for flexible integration.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🏗️ \u003cstrong\u003eMetal Construction\u003c\/strong\u003e\u003cbr\u003eMachined from durable metal alloy for strength under load — suitable for continuous-duty mechanical assemblies.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🎯 \u003cstrong\u003eModule 1 Standard\u003c\/strong\u003e\u003cbr\u003eConforms to the Mod 1 gear standard, ensuring interchangeability with other Mod 1 components in your build.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔄 \u003cstrong\u003eMatched Pairing Design\u003c\/strong\u003e\u003cbr\u003eSold as individual gears; pair two same-tooth-count units for a clean 1:1 90° drive set in any compact gearbox.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — 1 Mod Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1\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\u003eShaft Angle\u003c\/th\u003e\n\u003ctd\u003e90°\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 (Model)\u003c\/th\u003e\n\u003ctd\u003e20T \/ 25T \/ 30T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e5mm \/ 6mm \/ 8mm \/ 10mm \/ 12mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eMetal alloy (see variant options)\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\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\u003eHub Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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 tooth count — 20T, 25T, or 30T?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAll three options produce a 1:1 ratio when paired with a matching tooth-count gear. Choose based on the physical space in your gearbox: 20T is the most compact, 30T offers a larger pitch diameter and smoother load distribution. If torque capacity is a concern, a higher tooth count generally distributes load across more teeth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size should I select for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSelect the bore that matches your shaft diameter exactly. Available bores are 5mm, 6mm, 8mm, 10mm, and 12mm. If your shaft is metric, match directly. For imperial shafts, convert first (e.g., 1\/4\" ≈ 6.35mm — in that case, a 6mm bore would be too tight; contact us to confirm fit).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I pair a 20T gear with a 25T or 30T gear?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo. For a proper 90° 1:1 mesh, both gears in the pair must have the same tooth count and the same module (Mod 1). Mixing tooth counts will result in incorrect gear ratios and poor mesh geometry, leading to noise and accelerated wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these gears corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are metal alloy gears. Corrosion resistance depends on the specific alloy and surface finish of the variant you select. For environments with moisture or chemical exposure, consider applying a compatible gear lubricant or protective coating. Contact us to confirm the material specification for your chosen variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat applications are these bevel gears suitable for?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are well-suited for CNC machines, robotics, RC vehicles, custom gearboxes, automation equipment, and any mechanical assembly requiring a compact 90° right-angle drive. They are not recommended for high-shock or extreme-load industrial applications without engineering review.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need a set screw or keyway to secure the gear to the shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eKeyway availability depends on the specific variant. Please contact us to confirm whether your selected model includes a keyway or set screw provision. For most DIY and light-duty applications, a set screw hub is the standard securing method.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between module (Mod) and diametral pitch (DP)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModule is the metric gear standard (Mod 1 = 1mm per tooth of pitch diameter). Diametral pitch is the imperial equivalent. These gears are Mod 1 metric. They are not directly interchangeable with DP gears. If your existing system uses DP gears, these will not mesh correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Model (tooth count) and Bore diameter above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"20T \/ 5mm","offer_id":52439298539794,"sku":"TRA16147","price":8.36,"currency_code":"USD","in_stock":true},{"title":"20T \/ 6mm","offer_id":52439298572562,"sku":"TRA16148","price":8.36,"currency_code":"USD","in_stock":true},{"title":"20T \/ 8mm","offer_id":52439298605330,"sku":"TRA16150","price":8.36,"currency_code":"USD","in_stock":true},{"title":"25T \/ 6mm","offer_id":52439298638098,"sku":"TRA16151","price":9.32,"currency_code":"USD","in_stock":true},{"title":"25T \/ 8mm","offer_id":52439298670866,"sku":"TRA16152","price":9.32,"currency_code":"USD","in_stock":true},{"title":"25T \/ 10mm","offer_id":52439298703634,"sku":"TRA16153","price":9.32,"currency_code":"USD","in_stock":true},{"title":"25T \/ 12mm","offer_id":52439298736402,"sku":"TRA16154","price":9.32,"currency_code":"USD","in_stock":true},{"title":"30T \/ 6mm","offer_id":52439298769170,"sku":"TRA16155","price":134.16,"currency_code":"USD","in_stock":true},{"title":"30T \/ 8mm","offer_id":52439298801938,"sku":"TRA16156","price":11.76,"currency_code":"USD","in_stock":true},{"title":"30T \/ 10mm","offer_id":52439298834706,"sku":"TRA16157","price":11.76,"currency_code":"USD","in_stock":true},{"title":"30T \/ 12mm","offer_id":52439298867474,"sku":"TRA16158","price":134.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_6fe96cbc-2af0-4d2e-a022-f6f1d5daf061.jpg?v=1783331606","url":"https:\/\/homediyer.com\/products\/1-mod-bevel-gear-20t-25t-30t-bore-5-12mm-metal-transmission-gear","provider":"HomeDIYer","version":"1.0","type":"link"}