{"product_id":"spiral-bevel-gear-c45-steel-mod-1-5-ratio-1-2-15-30-18-36-tooth-hardened-black","title":"Spiral Bevel Gear C45 Steel Mod 1.5 Ratio 1:2 15 30 18 36 Tooth Hardened Black","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eSpiral Bevel Gear C45 Steel Mod 1.5 — Smooth, Quiet 90° Power Transmission\u003c\/h2\u003e\n\u003cp\u003eWhen a right-angle drive application demands smooth engagement and reduced noise, standard straight bevel gears fall short. Engineers, machine builders, and serious DIYers working on gearboxes, conveyors, printing equipment, or agricultural machinery need a spiral bevel gear that delivers consistent tooth contact and long service life. This Module 1.5 spiral bevel gear set is designed for exactly those demanding scenarios.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from C45 medium-carbon steel and surface-hardened for wear resistance, finished with a black oxide coating. The module is 1.5 with a 1:2 gear ratio, available in 15\/30 tooth and 18\/36 tooth pairings. Bore sizes range from 8 mm (0.31 in) to 16 mm (0.63 in), with plain bore and keyway options (4 mm or 5 mm keyway) to suit different shaft configurations. Tooth count and bore size are selectable via variants.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include right-angle gearbox assemblies for CNC router axis drives, spiral bevel gear replacement for agricultural feed augers, and 90-degree power transmission in compact industrial automation rigs — all applications where a module 1.5 hardened bevel gear with keyway bore delivers reliable torque transfer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e Compatible with Module 1.5 bevel gear systems. Sold as pinion (small) or wheel (large) — select matching tooth counts for a 1:2 ratio pair. Verify bore diameter and keyway dimensions against your shaft before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Spiral Bevel Gears\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eC45 Hardened Steel Construction\u003c\/strong\u003e — Machined from medium-carbon C45 steel with surface hardening for extended wear life under continuous load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eSpiral Tooth Profile\u003c\/strong\u003e — Curved tooth geometry provides gradual tooth engagement, reducing impact noise and vibration compared to straight bevel gears.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eModule 1.5, Ratio 1:2\u003c\/strong\u003e — Standardized module for interchangeability; 1:2 ratio pairs (15\/30T and 18\/36T) available to match your speed reduction requirement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🕳️\u003c\/span\u003e\u003cstrong\u003eMultiple Bore \u0026amp; Keyway Options\u003c\/strong\u003e — Plain bores (8 mm, 10 mm, 12 mm) and keyway bores (12 mm+4 mm, 14 mm+5 mm, 15 mm+5 mm, 16 mm+5 mm) for secure shaft mounting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e↔️\u003c\/span\u003e\u003cstrong\u003eLeft-Hand \u0026amp; Right-Hand Versions\u003c\/strong\u003e — Both spiral directions available; select the correct hand to match your drive configuration and rotation requirement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🖤\u003c\/span\u003e\u003cstrong\u003eBlack Oxide Surface Finish\u003c\/strong\u003e — Provides mild corrosion resistance and a clean appearance; suitable for indoor mechanical environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Spiral Bevel Gear\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\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\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\u003e1:2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count (Pinion \/ Wheel)\u003c\/th\u003e\n\u003ctd\u003e15\/30 or 18\/36 — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003eTypically 20°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpiral Angle\u003c\/th\u003e\n\u003ctd\u003eTypically 35°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e8 mm \/ 10 mm \/ 12 mm \/ 14 mm \/ 15 mm \/ 16 mm — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKeyway\u003c\/th\u003e\n\u003ctd\u003e4 mm or 5 mm (on applicable bore sizes) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpiral Direction\u003c\/th\u003e\n\u003ctd\u003eLeft-hand or Right-hand — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc \/ 2 pcs \/ 3 pcs — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish Color\u003c\/th\u003e\n\u003ctd\u003eBlack\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 choose between the 15\/30 tooth and 18\/36 tooth pairing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBoth pairings deliver a 1:2 speed reduction ratio. The 15\/30 tooth set has a smaller pitch diameter, making it more compact and suited to tighter spaces. The 18\/36 tooth set has a larger contact area, which can handle slightly higher torque loads and runs with lower tooth stress. Choose based on your available envelope size and torque requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to order both the pinion and the wheel, or are they sold as a matched pair?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach variant listing represents a single gear (pinion or wheel) at the selected tooth count. To build a complete 1:2 ratio drive, you need one 15-tooth gear paired with one 30-tooth gear, or one 18-tooth gear paired with one 36-tooth gear. Select the correct bore size for each shaft independently. Use the quantity option (1\/2\/3 pcs) if you need multiples of the same gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between left-hand and right-hand spiral direction?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSpiral direction determines the axial thrust direction during operation. A left-hand pinion meshed with a right-hand wheel (or vice versa) is the standard pairing for a 90° drive. If you are replacing an existing gear, match the spiral hand of the original. If designing a new system, consult your gearbox layout to determine which combination produces the desired thrust direction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these gears, and what load can they handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese gears are machined from C45 steel with surface hardening, giving them good fatigue strength for moderate-duty applications. Exact torque capacity depends on operating speed, lubrication, and mounting rigidity. For precise load calculations, apply standard bevel gear rating methods (e.g., AGMA or ISO 10300) using the module, tooth count, face width, and material hardness. Contact us if you need application-specific guidance.\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\u003eThe black oxide finish provides mild corrosion resistance suitable for dry or lightly oiled indoor environments. For outdoor, humid, or washdown applications, additional protection such as grease packing, sealed housings, or periodic re-lubrication is recommended. If long-term corrosion resistance is critical, consider stainless steel alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich bore size and keyway should I select for my shaft?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure your shaft diameter precisely with calipers. Select the bore size that matches your shaft — plain bores (8 mm, 10 mm, 12 mm) suit standard shafts, while keyway bores (12 mm+4 mm key, 14 mm+5 mm key, 15 mm+5 mm key, 16 mm+5 mm key) are for keyed shafts requiring positive torque transmission without slipping. Ensure your shaft has a matching keyway cut if ordering a keyway bore variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat lubrication is recommended for these spiral bevel gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eSpiral bevel gears perform best with a gear oil or EP (extreme pressure) grease applied to the tooth flanks. For enclosed gearboxes, an ISO VG 220 or VG 320 gear oil is typical. For open drives or low-speed applications, a lithium-based EP grease works well. Ensure adequate lubrication at initial run-in and check periodically during service.\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 Direction \u0026amp; 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【15 Tooth】 \/ 8mm \/ Left-handed \u0026 1 pcs","offer_id":52439347101970,"sku":"PENGDZ00236x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【15 Tooth】 \/ 10mm \/ Left-handed \u0026 1 pcs","offer_id":52439347134738,"sku":"PENGDZ00237x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【30 Tooth】 \/ 10mm \/ Right-handed \u0026 1 pcs","offer_id":52439347167506,"sku":"PENGDZ00238x1","price":29.44,"currency_code":"USD","in_stock":true},{"title":"Module 1.5【30 Tooth】 \/ 12mm + 4mm Keyway \/ Right-handed \u0026 1 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