{"product_id":"module-3-bevel-gear-c45-steel-miter-gear-90-degree-20-tooth-hardened-black","title":"Module 3 Bevel Gear C45 Steel Miter Gear 90° 1:1 Pairing 20 Tooth Hardened Black","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 3 Bevel Gear — Precision 90° Miter Drive for Reliable Power Transmission\u003c\/h2\u003e\n\u003cp\u003eWhen your build demands a clean 90-degree direction change without sacrificing torque or alignment accuracy, a poorly matched gear set becomes the weakest link in your drivetrain. Engineers, machine builders, and serious DIY makers who need repeatable, low-backlash power transmission rely on a properly spec'd miter gear pair — not a generic substitute. This Module 3 bevel gear is designed for exactly that application.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from C45 medium-carbon steel and treated with a hardened black oxide finish for improved surface hardness and corrosion resistance. The 20-tooth, Module 3 profile delivers a pitch circle diameter of 60 mm (approx. 2.36 in). Bore sizes range from 15 mm to 28 mm (0.59–1.10 in), each paired with a precision-cut keyway (5 mm, 6 mm, or 8 mm depending on bore) for positive shaft engagement. Sold individually or as a matched 1:1 pair.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include right-angle gearbox assemblies for CNC router axis drives, custom conveyor direction changes requiring a compact 90° miter gear module 3 setup, and industrial automation rigs where a C45 steel bevel gear with keyway bore ensures consistent shaft-to-gear coupling under cyclic load.\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 1:1 at 90° with an identical Module 3, 20-tooth bevel gear. Verify shaft diameter and keyway dimensions against your bore size selection before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 3 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 balanced combination of machinability, tensile strength (typically 580–700 MPa), and wear resistance — suited for moderate-to-heavy duty drivetrain applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⬛\u003c\/span\u003e \u003cstrong\u003eHardened Black Oxide Finish\u003c\/strong\u003e\n\u003cp\u003eThe black oxide surface treatment improves micro-hardness, reduces friction during run-in, and provides a baseline layer of corrosion inhibition in dry or lightly oiled environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eModule 3 — 20 Tooth Profile\u003c\/strong\u003e\n\u003cp\u003eModule 3 tooth geometry yields a 60 mm pitch circle diameter with a tooth pitch of ~9.42 mm, enabling smooth meshing at 90° with a matched miter gear and minimal backlash when properly mounted.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔑\u003c\/span\u003e \u003cstrong\u003ePrecision Keyway Bore Options\u003c\/strong\u003e\n\u003cp\u003eNine bore sizes from 15 mm to 28 mm, each with a matched keyway (5 mm, 6 mm, or 8 mm) for positive, slip-free shaft coupling. Select the bore that matches your shaft diameter exactly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eTrue 90° 1:1 Miter Pairing\u003c\/strong\u003e\n\u003cp\u003eIdentical tooth count on both gears ensures a 1:1 speed and torque ratio at a precise 90-degree shaft angle — ideal for direction-change applications where output speed must equal input speed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eSingle or Matched Pair Quantity\u003c\/strong\u003e\n\u003cp\u003eAvailable as 1 pc (single gear) or 2 pcs (matched miter pair). Order 2 pcs to receive a complete, pre-matched 90° bevel gear set ready for direct installation.\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 — Module 3 Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eBevel Gear (Miter Gear)\u003c\/td\u003e\n\u003c\/tr\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\u003eNumber of Teeth\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\u003ePitch Circle Diameter\u003c\/th\u003e\n\u003ctd\u003e60 mm (2.36 in)\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 Oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Size Range\u003c\/th\u003e\n\u003ctd\u003e15 mm – 28 mm (0.59–1.10 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway Width\u003c\/th\u003e\n\u003ctd\u003e5 mm (15–17 mm bore) \/ 6 mm (18–22 mm bore) \/ 8 mm (24–28 mm bore)\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\u003eFace Width\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 the correct bore size for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft diameter with a caliper. Select the bore size that matches your shaft exactly — for example, if your shaft is 20 mm in diameter, choose the \"20mm + 6mm Keyway\" option. The keyway width is fixed per bore size, so also confirm your shaft has a matching keyway slot cut to the correct width (5 mm, 6 mm, or 8 mm depending on bore).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to buy two gears to complete a 90° miter drive?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — a miter gear drive requires two identical gears meshing at 90°. Select the \"2 pcs\" quantity option to receive a matched pair. Both gears share the same Module 3, 20-tooth specification, ensuring a true 1:1 ratio. If you already have one gear, you can order a single piece (\"1 pcs\") as a replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the load capacity of a C45 steel bevel gear at Module 3?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eC45 steel has a typical tensile strength of 580–700 MPa and yield strength of approximately 305–450 MPa. Actual load capacity depends on operating speed (RPM), lubrication, mounting accuracy, and duty cycle. For precise torque ratings, consult a mechanical engineer using the gear's pitch circle diameter (60 mm) and face width as inputs to standard gear strength calculations (e.g., AGMA or ISO 6336).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs the black oxide finish sufficient for corrosion resistance in humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBlack oxide provides a baseline level of corrosion inhibition and is suitable for dry or lightly oiled indoor environments. For applications exposed to moisture, coolant, or outdoor conditions, we recommend applying a light coat of gear oil or anti-rust grease to the tooth surfaces and bore after installation to extend service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this gear mesh with other Module 3 bevel gears from different manufacturers?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModule 3 is a standardized metric gear specification, so this gear is designed to be dimensionally compatible with other Module 3, 20-tooth bevel gears that share the same pressure angle. However, minor manufacturing tolerances can affect backlash. For critical applications, test-fit before final assembly and verify the pressure angle matches your existing gear.\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 moderate-speed applications, an ISO VG 220 gear oil or a lithium-based grease applied to the tooth contact surfaces is suitable. For high-speed or continuous-duty use, consult a lubrication engineer. Avoid dry running — even a thin film of lubricant significantly extends tooth life and reduces operating temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears in a vertical shaft orientation?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Bevel gears can operate in any shaft orientation — horizontal, vertical, or angled — provided the housing or bearing arrangement adequately supports the axial (thrust) loads generated by the bevel tooth geometry. Ensure your bearing selection accounts for both radial and axial load components when mounting in a vertical configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Models, 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 3【20 Tooth】 \/ 15mm + 5mm Keyway \/ 1 pcs","offer_id":52439241785618,"sku":"PENGDZ00146x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 16mm + 5mm Keyway \/ 1 pcs","offer_id":52439241818386,"sku":"PENGDZ00147x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 17mm + 5mm Keyway \/ 1 pcs","offer_id":52439241851154,"sku":"PENGDZ00148x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 18mm + 6mm Keyway \/ 1 pcs","offer_id":52439241883922,"sku":"PENGDZ00149x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 20mm + 6mm Keyway \/ 1 pcs","offer_id":52439241916690,"sku":"PENGDZ00150x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 22mm + 6mm Keyway \/ 1 pcs","offer_id":52439241949458,"sku":"PENGDZ00151x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 24mm + 8mm Keyway \/ 1 pcs","offer_id":52439241982226,"sku":"PENGDZ00152x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 25mm + 8mm Keyway \/ 1 pcs","offer_id":52439242014994,"sku":"PENGDZ00153x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 28mm + 8mm Keyway \/ 1 pcs","offer_id":52439242047762,"sku":"PENGDZ00154x1","price":51.82,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 15mm + 5mm Keyway \/ 2 pcs","offer_id":52439242080530,"sku":"PENGDZ00146x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 16mm + 5mm Keyway \/ 2 pcs","offer_id":52439242113298,"sku":"PENGDZ00147x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 17mm + 5mm Keyway \/ 2 pcs","offer_id":52439242146066,"sku":"PENGDZ00148x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 18mm + 6mm Keyway \/ 2 pcs","offer_id":52439242178834,"sku":"PENGDZ00149x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 20mm + 6mm Keyway \/ 2 pcs","offer_id":52439242211602,"sku":"PENGDZ00150x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 22mm + 6mm Keyway \/ 2 pcs","offer_id":52439242244370,"sku":"PENGDZ00151x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 24mm + 8mm Keyway \/ 2 pcs","offer_id":52439242277138,"sku":"PENGDZ00152x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 25mm + 8mm Keyway \/ 2 pcs","offer_id":52439242309906,"sku":"PENGDZ00153x2","price":101.59,"currency_code":"USD","in_stock":true},{"title":"Module 3【20 Tooth】 \/ 28mm + 8mm Keyway \/ 2 pcs","offer_id":52439242342674,"sku":"PENGDZ00154x2","price":101.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-04_ebe2cfd9-f55a-4138-bb71-75839ad7c08e.jpg?v=1782916052","url":"https:\/\/homediyer.com\/products\/module-3-bevel-gear-c45-steel-miter-gear-90-degree-20-tooth-hardened-black","provider":"HomeDIYer","version":"1.0","type":"link"}