{"product_id":"mod-1-5-bevel-gear-c45-steel-gear-ratio-1-1-5-20-tooth-30-tooth-hardened-black","title":"Mod 1.5 Bevel Gear C45 Steel Gear Ratio 1:1.5 20 Tooth 30 Tooth Hardened Black","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eMod 1.5 Bevel Gear C45 Steel — Reliable Right-Angle Power Transmission\u003c\/h2\u003e\n\u003cp\u003eWhen your build demands a clean 90° power transfer without slippage or backlash, the wrong gear set becomes a costly bottleneck. Engineers, machinists, and serious DIYers working on gearboxes, rotary tables, and drive assemblies need a bevel gear that holds tolerance under load — not one that wears out after a few hundred cycles.\u003c\/p\u003e\n\u003cp\u003eThese Mod 1.5 bevel gears are machined from C45 medium-carbon steel and finished with a hardened black surface treatment for wear resistance. Available in two tooth counts — 20T and 30T — forming a 1:1.5 gear ratio pair. Bore sizes range from 8mm (0.31 in) to 15mm (0.59 in), with an outer diameter typically in the 33–48mm (1.30–1.89 in) range depending on tooth count. Sold individually or in multi-piece sets of up to 5 pcs.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include right-angle gearbox assemblies for CNC router builds, rotary indexing tables requiring a 1:1.5 speed reduction, and custom drive trains in agricultural or workshop automation equipment where a compact bevel gear pair is needed.\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 Mod 1.5 gear systems. Pair the 20-tooth gear with the 30-tooth gear to achieve a 1:1.5 drive ratio. Confirm bore size matches your shaft diameter before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Mod 1.5 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 balance of machinability and tensile strength, suitable for moderate-to-heavy torque applications in mechanical assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⬛\u003c\/span\u003e \u003cstrong\u003eHardened Black Surface Finish\u003c\/strong\u003e\n\u003cp\u003eThe blackening treatment improves surface hardness and corrosion resistance, extending service life in workshop and light-industrial environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003e1:1.5 Gear Ratio Pair (20T \/ 30T)\u003c\/strong\u003e\n\u003cp\u003eThe 20-tooth and 30-tooth gears are matched to deliver a precise 1:1.5 speed reduction or increase, ideal for right-angle drive configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eMultiple Bore Sizes: 8mm to 15mm\u003c\/strong\u003e\n\u003cp\u003eChoose from 8mm, 10mm, 12mm, 14mm, or 15mm bore to match your shaft diameter directly — no bushing required for standard shaft sizes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible Quantity Options (1–5 pcs)\u003c\/strong\u003e\n\u003cp\u003eOrder a single gear for a replacement or up to 5 pieces for multi-axis builds or spare inventory — quantity pricing scales accordingly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003e90° Right-Angle Power Transmission\u003c\/strong\u003e\n\u003cp\u003eBevel gear geometry enables smooth torque transfer between intersecting shafts at 90°, making these gears a compact solution for direction-change drive systems.\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 — Mod 1.5 Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Ratio\u003c\/th\u003e\n\u003ctd\u003e1:1.5 (20T drives 30T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e20 Tooth \/ 30 Tooth\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Size Options\u003c\/th\u003e\n\u003ctd\u003e8mm \/ 10mm \/ 12mm \/ 14mm \/ 15mm\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\u003eOuter Diameter (20T)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (30T)\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\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Quantities\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 4 \/ 5 pcs\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 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. Available bore sizes are 8mm, 10mm, 12mm, 14mm, and 15mm. Select the bore that matches your shaft exactly — a loose fit will cause runout and vibration, while an undersized bore cannot be installed without machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need both the 20-tooth and 30-tooth gears to achieve the 1:1.5 ratio?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 1:1.5 gear ratio is achieved by pairing the 20-tooth (driver) with the 30-tooth (driven) gear. If you only need a replacement for one gear in an existing pair, you can order just the tooth count you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these bevel gears under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eC45 steel has a tensile strength typically in the 600–800 MPa range, making these gears suitable for moderate-to-heavy torque in low-to-medium speed applications. For high-speed or shock-load environments, consult your application's torque requirements against the gear's rated capacity.\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\u003eThe hardened black surface treatment provides a degree of corrosion resistance suitable for indoor workshop and light-industrial use. For outdoor or high-humidity environments, periodic lubrication is recommended. These gears are not rated for submersion or highly corrosive chemical exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears with other Mod 1.5 gears from different brands?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eModule (Mod) is a standardized metric gear specification, so Mod 1.5 gears from different manufacturers are generally interchangeable in terms of tooth profile and pitch. However, always verify the pressure angle (20° standard) and shaft angle (90°) match your existing gear set before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the 20-tooth and 30-tooth gear in this set?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 20-tooth gear is the smaller driver gear and the 30-tooth is the larger driven gear. When the 20T gear drives the 30T gear, the output shaft rotates at 2\/3 the speed of the input shaft (speed reduction). Reversing the driver\/driven roles gives a 1.5× speed increase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I order 1 piece or a multi-piece set?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIf you are building a single right-angle drive, you need at minimum one 20T and one 30T gear (order each separately as 1 pcs). Multi-piece sets (2–5 pcs) are cost-effective for multi-axis machines, production builds, or keeping spares on hand. Per-unit pricing decreases with larger quantity options.\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 1.5【20 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439341138194,"sku":"PENGJGJXCD2376x1","price":11.63,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52439341170962,"sku":"PENGJGJXCD2377x1","price":11.63,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【20 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52439341203730,"sku":"PENGJGJXCD2378x1","price":11.63,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【30 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52439341236498,"sku":"PENGJGJXCD2379x1","price":21.83,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【30 Tooth】 \/ 10mm \/ 1 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