{"product_id":"3-modul-steel-spur-gears-pinion-gear-thick-30mm-10-51-teeth-cnc","title":"3 Modul Steel Spur Gears Pinion Gear Thick 30mm 10-100 Teeth For 3D CNC","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 3 Steel Spur Gears — Precision Pinion Gears for CNC, 3D Printing \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eWhen your CNC router, 3D printer, or motion-control rig demands consistent torque transfer without backlash surprises, the right spur gear makes all the difference. Engineers, makers, and workshop builders who need a reliable Module 3 steel pinion gear with a generous 30 mm face width will find this range covers the most common tooth counts in a single listing.\u003c\/p\u003e\n\u003cp\u003eThese spur gears are machined from carbon steel, offering a solid balance of strength and machinability. Each gear features a Module 3 (3 mm\/tooth pitch) profile with a face width (thickness) of 30 mm (~1.18 in). Tooth counts span from 10 to 51 teeth, giving pitch circle diameters from approximately 30 mm (~1.18 in) for the 10-tooth pinion up to approximately 153 mm (~6.02 in) for the 51-tooth gear. Bore diameter and keyway dimensions vary by tooth count — see variant options for exact bore specs.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CNC rack-and-pinion drive systems for router gantries, extruder and Z-axis drive trains in FDM 3D printers, rotary indexing tables and robotic joint actuators, and custom automation conveyor or feed mechanisms requiring a standard Module 3 mesh.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Meshes with any standard Module 3 (Mod 3) spur gear, rack, or pinion. Verify bore diameter and keyway against your shaft before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 3 Steel Spur Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e\n\u003cp\u003eMachined from carbon steel for dependable strength under continuous rotational loads in CNC and automation applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n\u003cstrong\u003e30 mm Face Width\u003c\/strong\u003e\n\u003cp\u003eA 30 mm (1.18 in) tooth face provides broad contact area, distributing load evenly and reducing tooth wear over long duty cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔢\u003c\/span\u003e\n\u003cstrong\u003eWide Tooth-Count Range (10–51 Teeth)\u003c\/strong\u003e\n\u003cp\u003e42 variants from 10 to 51 teeth let you dial in the exact gear ratio your drive system needs without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n\u003cstrong\u003eStandard Module 3 Profile\u003c\/strong\u003e\n\u003cp\u003eConforms to the international Module 3 gear standard, ensuring direct mesh compatibility with off-the-shelf Mod 3 racks and mating gears.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n\u003cstrong\u003ePrecision-Cut Involute Teeth\u003c\/strong\u003e\n\u003cp\u003eInvolute tooth geometry delivers smooth, low-noise power transmission and consistent pitch-line velocity across the full tooth-count range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\n\u003cstrong\u003eReady for CNC \u0026amp; 3D Printer Builds\u003c\/strong\u003e\n\u003cp\u003eSized and profiled for direct integration into CNC router gantries, 3D printer drive trains, rotary tables, and custom automation rigs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Module 3 Steel Spur Gears\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule (Mod)\u003c\/th\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e10 – 51 Teeth (select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFace Width (Thickness)\u003c\/th\u003e\n\u003ctd\u003e30 mm (1.18 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePitch Circle Diameter\u003c\/th\u003e\n\u003ctd\u003e30 mm – 153 mm (1.18 in – 6.02 in), varies by tooth count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard involute)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon Steel\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\u003eBore 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\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute Spur\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGear Standard\u003c\/th\u003e\n\u003ctd\u003eModule (ISO\/DIN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eCNC, 3D Printing, Robotics, Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\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 for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eDetermine your required gear ratio first: divide the driven gear tooth count by the driving pinion tooth count. For CNC rack-and-pinion systems, calculate linear travel per revolution using the formula: travel = π × Module × Teeth. Select the tooth count that gives you the desired travel-per-step or torque multiplication for your motor.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is Module 3 and is it compatible with my existing gears?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eModule (Mod) is the international standard for gear tooth size: Module 3 means 3 mm of pitch circle diameter per tooth. These gears will mesh correctly with any other Module 3 spur gear, pinion, or rack that shares the same 20° pressure angle. They are not compatible with Module 2, Module 4, or imperial DP gears.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these steel spur gears under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCarbon steel spur gears at Module 3 with a 30 mm face width are suitable for moderate-to-heavy loads typical of CNC router gantries and robotic joints. Exact load ratings depend on tooth count, shaft fit, lubrication, and operating speed. For high-cycle or high-speed applications, ensure proper lubrication and verify your torque requirements against the gear's pitch circle diameter.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these gears resist corrosion?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCarbon steel has moderate corrosion resistance. For indoor CNC and 3D printer environments this is generally sufficient. If your application involves moisture, coolant mist, or outdoor exposure, consider applying a light machine oil coating or selecting a stainless steel alternative for your setup.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat bore diameter and keyway do these gears have?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBore diameter and keyway dimensions vary by tooth count and are listed in the variant options. Please check the specific variant detail before ordering to confirm compatibility with your shaft diameter. If you need a custom bore, the carbon steel material is readily machinable on a lathe.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these gears in a 3D printer extruder or Z-axis drive?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Module 3 spur gears are commonly used in large-format FDM 3D printer Z-axis lead screw drives and direct-drive extruder reduction stages. Select a tooth count that achieves your target gear ratio, and verify the bore fits your motor shaft or lead screw coupler diameter.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I measure my existing gear to confirm it is Module 3?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCount the teeth on your existing gear, then measure the outside diameter (tip-to-tip) in millimeters. Use the formula: Module = Outside Diameter ÷ (Tooth Count + 2). If the result is approximately 3.0, your gear is Module 3 and these pinions will mesh with it correctly.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your tooth count (Model) above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right tooth count for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Determine your required gear ratio first: divide the driven gear tooth count by the driving pinion tooth count. For CNC rack-and-pinion systems, calculate linear travel per revolution using the formula: travel = π × Module × Teeth. Select the tooth count that gives you the desired travel-per-step or torque multiplication for your motor.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is Module 3 and is it compatible with my existing gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Module (Mod) is the international standard for gear tooth size: Module 3 means 3 mm of pitch circle diameter per tooth. These gears will mesh correctly with any other Module 3 spur gear, pinion, or rack that shares the same 20° pressure angle. They are not compatible with Module 2, Module 4, or imperial DP gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are these steel spur gears under load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carbon steel spur gears at Module 3 with a 30 mm face width are suitable for moderate-to-heavy loads typical of CNC router gantries and robotic joints. Exact load ratings depend on tooth count, shaft fit, lubrication, and operating speed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do these gears resist corrosion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carbon steel has moderate corrosion resistance. For indoor CNC and 3D printer environments this is generally sufficient. If your application involves moisture, coolant mist, or outdoor exposure, consider applying a light machine oil coating.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore diameter and keyway do these gears have?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bore diameter and keyway dimensions vary by tooth count and are listed in the variant options. Please check the specific variant detail before ordering to confirm compatibility with your shaft diameter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears in a 3D printer extruder or Z-axis drive?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Module 3 spur gears are commonly used in large-format FDM 3D printer Z-axis lead screw drives and direct-drive extruder reduction stages. Select a tooth count that achieves your target gear ratio, and verify the bore fits your motor shaft or lead screw coupler diameter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I measure my existing gear to confirm it is Module 3?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Count the teeth on your existing gear, then measure the outside diameter (tip-to-tip) in millimeters. Use the formula: Module = Outside Diameter ÷ (Tooth Count + 2). If the result is approximately 3.0, your gear is Module 3 and these pinions will mesh with it correctly.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"3Mod 10Teeth","offer_id":52443358396690,"sku":"GLFBLFFGLBZSJ058177x1","price":11.0,"currency_code":"USD","in_stock":true},{"title":"3Mod 11Teeth","offer_id":52443358429458,"sku":"GLFBLFFGLBZSJ058178x1","price":14.62,"currency_code":"USD","in_stock":true},{"title":"3Mod 12Teeth","offer_id":52443358462226,"sku":"GLFBLFFGLBZSJ058179x1","price":28.3,"currency_code":"USD","in_stock":true},{"title":"3Mod 13Teeth","offer_id":52443358494994,"sku":"GLFBLFFGLBZSJ058180x1","price":35.47,"currency_code":"USD","in_stock":true},{"title":"3Mod 14Teeth","offer_id":52443358527762,"sku":"GLFBLFFGLBZSJ058181x1","price":35.47,"currency_code":"USD","in_stock":true},{"title":"3Mod 15Teeth","offer_id":52443358560530,"sku":"GLFBLFFGLBZSJ058182x1","price":42.88,"currency_code":"USD","in_stock":true},{"title":"3Mod 16Teeth","offer_id":52443358593298,"sku":"GLFBLFFGLBZSJ058183x1","price":43.64,"currency_code":"USD","in_stock":true},{"title":"3Mod 17Teeth","offer_id":52443358626066,"sku":"GLFBLFFGLBZSJ058184x1","price":50.59,"currency_code":"USD","in_stock":true},{"title":"3Mod 18Teeth","offer_id":52443358658834,"sku":"GLFBLFFGLBZSJ058185x1","price":50.84,"currency_code":"USD","in_stock":true},{"title":"3Mod 19Teeth","offer_id":52443358691602,"sku":"GLFBLFFGLBZSJ058186x1","price":58.89,"currency_code":"USD","in_stock":true},{"title":"3Mod 20Teeth","offer_id":52443358724370,"sku":"GLFBLFFGLBZSJ058187x1","price":66.46,"currency_code":"USD","in_stock":true},{"title":"3Mod 21Teeth","offer_id":52443358757138,"sku":"GLFBLFFGLBZSJ058188x1","price":74.41,"currency_code":"USD","in_stock":true},{"title":"3Mod 22Teeth","offer_id":52443358789906,"sku":"GLFBLFFGLBZSJ058189x1","price":73.39,"currency_code":"USD","in_stock":true},{"title":"3Mod 23Teeth","offer_id":52443358822674,"sku":"GLFBLFFGLBZSJ058190x1","price":80.73,"currency_code":"USD","in_stock":true},{"title":"3Mod 24Teeth","offer_id":52443358855442,"sku":"GLFBLFFGLBZSJ058191x1","price":88.26,"currency_code":"USD","in_stock":true},{"title":"3Mod 25Teeth","offer_id":52443358888210,"sku":"GLFBLFFGLBZSJ058192x1","price":95.61,"currency_code":"USD","in_stock":true},{"title":"3Mod 26Teeth","offer_id":52443358920978,"sku":"GLFBLFFGLBZSJ058193x1","price":103.1,"currency_code":"USD","in_stock":true},{"title":"3Mod 27Teeth","offer_id":52443358953746,"sku":"GLFBLFFGLBZSJ058194x1","price":110.45,"currency_code":"USD","in_stock":true},{"title":"3Mod 28Teeth","offer_id":52443358986514,"sku":"GLFBLFFGLBZSJ058195x1","price":110.45,"currency_code":"USD","in_stock":true},{"title":"3Mod 29Teeth","offer_id":52443359019282,"sku":"GLFBLFFGLBZSJ058196x1","price":119.27,"currency_code":"USD","in_stock":true},{"title":"3Mod 30Teeth","offer_id":52443359052050,"sku":"GLFBLFFGLBZSJ058197x1","price":126.6,"currency_code":"USD","in_stock":true},{"title":"3Mod 31Teeth","offer_id":52443359084818,"sku":"GLFBLFFGLBZSJ058198x1","price":141.48,"currency_code":"USD","in_stock":true},{"title":"3Mod 32Teeth","offer_id":52443359117586,"sku":"GLFBLFFGLBZSJ058199x1","price":239.29,"currency_code":"USD","in_stock":true},{"title":"3Mod 33Teeth","offer_id":52443359150354,"sku":"GLFBLFFGLBZSJ058200x1","price":246.64,"currency_code":"USD","in_stock":true},{"title":"3Mod 34Teeth","offer_id":52443359183122,"sku":"GLFBLFFGLBZSJ058201x1","price":253.25,"currency_code":"USD","in_stock":true},{"title":"3Mod 35Teeth","offer_id":52443359215890,"sku":"GLFBLFFGLBZSJ058202x1","price":260.2,"currency_code":"USD","in_stock":true},{"title":"3Mod 36Teeth","offer_id":52443359248658,"sku":"GLFBLFFGLBZSJ058203x1","price":268.26,"currency_code":"USD","in_stock":true},{"title":"3Mod 37Teeth","offer_id":52443359281426,"sku":"GLFBLFFGLBZSJ058204x1","price":282.8,"currency_code":"USD","in_stock":true},{"title":"3Mod 38Teeth","offer_id":52443359314194,"sku":"GLFBLFFGLBZSJ058205x1","price":287.72,"currency_code":"USD","in_stock":true},{"title":"3Mod 39Teeth","offer_id":52443359346962,"sku":"GLFBLFFGLBZSJ058206x1","price":295.07,"currency_code":"USD","in_stock":true},{"title":"3Mod 40Teeth","offer_id":52443359379730,"sku":"GLFBLFFGLBZSJ058207x1","price":302.65,"currency_code":"USD","in_stock":true},{"title":"3Mod 41Teeth","offer_id":52443359412498,"sku":"GLFBLFFGLBZSJ058208x1","price":316.74,"currency_code":"USD","in_stock":true},{"title":"3Mod 42Teeth","offer_id":52443359445266,"sku":"GLFBLFFGLBZSJ058209x1","price":323.56,"currency_code":"USD","in_stock":true},{"title":"3Mod 43Teeth","offer_id":52443359478034,"sku":"GLFBLFFGLBZSJ058210x1","price":337.66,"currency_code":"USD","in_stock":true},{"title":"3Mod 44Teeth","offer_id":52443359510802,"sku":"GLFBLFFGLBZSJ058211x1","price":345.0,"currency_code":"USD","in_stock":true},{"title":"3Mod 45Teeth","offer_id":52443359543570,"sku":"GLFBLFFGLBZSJ058212x1","price":361.87,"currency_code":"USD","in_stock":true},{"title":"3Mod 46Teeth","offer_id":52443359576338,"sku":"GLFBLFFGLBZSJ058213x1","price":369.44,"currency_code":"USD","in_stock":true},{"title":"3Mod 47Teeth","offer_id":52443359609106,"sku":"GLFBLFFGLBZSJ058214x1","price":383.55,"currency_code":"USD","in_stock":true},{"title":"3Mod 48Teeth","offer_id":52443359641874,"sku":"GLFBLFFGLBZSJ058215x1","price":390.89,"currency_code":"USD","in_stock":true},{"title":"3Mod 49Teeth","offer_id":52443359674642,"sku":"GLFBLFFGLBZSJ058216x1","price":404.45,"currency_code":"USD","in_stock":true},{"title":"3Mod 50Teeth","offer_id":52443359707410,"sku":"GLFBLFFGLBZSJ058217x1","price":418.62,"currency_code":"USD","in_stock":true},{"title":"3Mod 51Teeth","offer_id":52443359740178,"sku":"GLFBLFFGLBZSJ058218x1","price":425.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-03_465af731-f81e-48ee-9a09-e5bda9a13778.jpg?v=1784112046","url":"https:\/\/homediyer.com\/products\/3-modul-steel-spur-gears-pinion-gear-thick-30mm-10-51-teeth-cnc","provider":"HomeDIYer","version":"1.0","type":"link"}