{"product_id":"5-modul-45-steel-spur-gears-pinion-gear-thickness-40mm-10-18-teeth-for-3d-cnc","title":"5 Modul 45# Steel Spur Gears Pinion Gear Thickness 40mm 10-18 Teeth For 3D CNC","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e5 Mod 45# Steel Spur Gears — Reliable Power Transmission for CNC \u0026amp; 3D Machinery\u003c\/h2\u003e\n    \u003cp\u003eWhen a worn or undersized pinion gear causes backlash, skipped steps, or premature drivetrain failure on your CNC router or 3D printer, the root cause is almost always inadequate material strength or imprecise tooth geometry. Engineers, makers, and machine builders who demand repeatable, low-noise motion need a spur gear that holds tolerance under continuous load — and that is exactly what these 5 Mod 45# steel pinion gears are designed to deliver.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from 45# medium-carbon steel, offering a balanced combination of tensile strength and machinability. The face (tooth) width is a consistent 40 mm (approx. 1.57 in), and the module is 5 (Module 5 \/ Mod 5), with available tooth counts ranging from 10 to 18 teeth. Corresponding pitch circle diameters range from 50 mm (≈1.97 in) for the 10-tooth variant up to 90 mm (≈3.54 in) for the 18-tooth variant.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include CNC gantry drives and rack-and-pinion linear motion systems, heavy-duty 3D printer extruder and Z-axis drives requiring high torque transmission, and industrial conveyor or rotary indexing mechanisms where consistent gear mesh and low backlash are critical.\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 Designed for Module 5 (Mod 5) gear systems. Mates with any standard Mod 5 rack, pinion, or mating gear. Verify bore diameter and keyway requirements against your shaft specification before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 5 Mod 45# Steel Spur Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e45# Medium-Carbon Steel Construction\u003c\/strong\u003e — Delivers the tensile strength and wear resistance needed for continuous-duty power transmission in CNC and industrial drive applications.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003e40 mm Face Width for High Torque Capacity\u003c\/strong\u003e — The generous 40 mm (1.57 in) tooth width distributes load evenly across the gear mesh, reducing contact stress and extending service life.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eModule 5 Standard Tooth Profile\u003c\/strong\u003e — Conforms to the international Module 5 gear standard, ensuring direct interchangeability with Mod 5 racks, pinions, and mating gears from any compliant supplier.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003e10–18 Tooth Range for Flexible Gear Ratios\u003c\/strong\u003e — Nine tooth-count options let you dial in the exact speed-to-torque ratio your drivetrain requires without custom machining.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eLow-Backlash Precision Hobbed Teeth\u003c\/strong\u003e — Hobbed tooth geometry provides smooth, consistent mesh engagement, minimizing positional error in CNC and motion-control applications.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\u003cstrong\u003eVersatile Bore — Ready for Shaft Fitting\u003c\/strong\u003e — Bore diameter is sized to accept standard shaft diameters; confirm your shaft size against the variant specifications. Suitable for keyed or set-screw retention.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — Module 5 Spur Gear\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Medium-Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule (Mod)\u003c\/th\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e10, 11, 12, 13, 14, 15, 16, 17, 18 Teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFace Width (Thickness)\u003c\/th\u003e\n\u003ctd\u003e40 mm (1.57 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Circle Diameter Range\u003c\/th\u003e\n\u003ctd\u003e50 mm – 90 mm (1.97 in – 3.54 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20° (standard)\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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eSpur Gear (Pinion)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Standard\u003c\/th\u003e\n\u003ctd\u003eModule 5 (ISO\/DIN)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eCNC routers, 3D printers, rack-and-pinion drives, industrial conveyors\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\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\u003eThe tooth count determines your gear ratio and pitch circle diameter. Fewer teeth (e.g., 10T) give a smaller pinion and higher speed reduction when meshed with a larger gear; more teeth (e.g., 18T) increase the pitch circle and reduce the ratio. Calculate your required ratio first, then select the tooth count that achieves it within your available center-distance constraints.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is Module 5 and will it mate 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 — it equals the pitch circle diameter divided by the number of teeth. Module 5 gears will mesh correctly with any other Module 5 gear, rack, or pinion that shares the same pressure angle (20°). They are not interchangeable with Module 4, Module 6, or imperial Diametral Pitch gears.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong are these gears under continuous load?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# steel has a typical tensile strength of approximately 600–700 MPa and yield strength of around 355 MPa, making it well-suited for moderate-to-heavy continuous-duty drives. For very high-shock or high-cycle applications, consider whether a hardened or alloy steel variant would better suit your load profile.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears corrosion-resistant?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel has limited inherent corrosion resistance. For indoor, dry environments this is generally acceptable with periodic lubrication. For humid, outdoor, or washdown environments, apply a suitable gear lubricant or consider a stainless steel or coated alternative to prevent surface oxidation.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore diameter do these gears have, and can I modify it?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBore diameter varies by variant — please refer to the variant specifications or contact us to confirm the bore size for your selected tooth count. The steel is machinable, so the bore can be enlarged or a keyway added by a competent machine shop if the standard bore does not match your shaft.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these gears on a CNC rack-and-pinion system?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. These Module 5 spur gears are a direct match for standard Mod 5 steel or nylon racks used in CNC gantry and linear motion systems. Ensure your rack is also Module 5 with a 20° pressure angle. The 40 mm face width provides ample contact area for the thrust loads typical in CNC router X\/Y axes.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow should I lubricate and maintain these gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eApply a suitable open-gear grease or EP (extreme pressure) gear oil to the tooth flanks during installation and re-lubricate at regular service intervals based on your duty cycle. Inspect teeth periodically for pitting, wear, or chipping. Clean away old lubricant and debris before re-applying fresh grease.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\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\": \"The tooth count determines your gear ratio and pitch circle diameter. Fewer teeth give a smaller pinion and higher speed reduction; more teeth increase the pitch circle and reduce the ratio. Calculate your required ratio first, then select the tooth count that achieves it within your center-distance constraints.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is Module 5 and will it mate with my existing gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Module 5 gears mesh correctly with any other Module 5 gear, rack, or pinion sharing the same 20° pressure angle. They are not interchangeable with Module 4, Module 6, or imperial Diametral Pitch gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are these gears under continuous load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# steel has a typical tensile strength of approximately 600–700 MPa and yield strength of around 355 MPa, making it well-suited for moderate-to-heavy continuous-duty drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears corrosion-resistant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel has limited inherent corrosion resistance. For indoor dry environments this is generally acceptable with periodic lubrication. For humid or outdoor environments, apply a suitable gear lubricant or consider a coated alternative.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore diameter do these gears have, and can I modify it?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bore diameter varies by variant — please refer to the variant specifications or contact us to confirm. The steel is machinable, so the bore can be enlarged or a keyway added by a machine shop if needed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears on a CNC rack-and-pinion system?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. These Module 5 spur gears are a direct match for standard Mod 5 racks used in CNC gantry and linear motion systems. Ensure your rack is also Module 5 with a 20° pressure angle.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How should I lubricate and maintain these gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Apply a suitable open-gear grease or EP gear oil to the tooth flanks during installation and re-lubricate at regular service intervals. Inspect teeth periodically for pitting, wear, or chipping.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"5Mod 10Teeth","offer_id":52442841252114,"sku":"GLFBLFFGLBZSJ058301x1","price":71.26,"currency_code":"USD","in_stock":true},{"title":"5Mod 11Teeth","offer_id":52442841284882,"sku":"GLFBLFFGLBZSJ058302x1","price":78.43,"currency_code":"USD","in_stock":true},{"title":"5Mod 12Teeth","offer_id":52442841317650,"sku":"GLFBLFFGLBZSJ058303x1","price":85.46,"currency_code":"USD","in_stock":true},{"title":"5Mod 13Teeth","offer_id":52442841350418,"sku":"GLFBLFFGLBZSJ058304x1","price":92.32,"currency_code":"USD","in_stock":true},{"title":"5Mod 14Teeth","offer_id":52442841383186,"sku":"GLFBLFFGLBZSJ058305x1","price":99.91,"currency_code":"USD","in_stock":true},{"title":"5Mod 15Teeth","offer_id":52442841415954,"sku":"GLFBLFFGLBZSJ058306x1","price":113.18,"currency_code":"USD","in_stock":true},{"title":"5Mod 16Teeth","offer_id":52442841448722,"sku":"GLFBLFFGLBZSJ058307x1","price":202.34,"currency_code":"USD","in_stock":true},{"title":"5Mod 17Teeth","offer_id":52442841481490,"sku":"GLFBLFFGLBZSJ058308x1","price":220.56,"currency_code":"USD","in_stock":true},{"title":"5Mod 18Teeth","offer_id":52442841514258,"sku":"GLFBLFFGLBZSJ058309x1","price":233.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture4of9_85e16df8-b7fe-4eb3-a6f1-648a85823ccb.jpg?v=1783615932","url":"https:\/\/homediyer.com\/products\/5-modul-45-steel-spur-gears-pinion-gear-thickness-40mm-10-18-teeth-for-3d-cnc","provider":"HomeDIYer","version":"1.0","type":"link"}