{"product_id":"4-modul-steel-spur-gears-pinion-gear-thick-35mm-10-55-teeth-for-3d-cnc","title":"4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e4 Mod Steel Spur Gears — Precision Pinion Gears for 3D Printers, CNC \u0026amp; DIY Motion Systems\u003c\/h2\u003e\n    \u003cp\u003eWhen a stripped or undersized gear brings your CNC router, 3D printer, or custom drive system to a halt, you need a replacement that fits precisely and holds up under load. These 4 Mod steel spur gears are engineered for makers, machine builders, and workshop professionals who demand reliable power transmission without constant maintenance or replacement cycles.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from carbon steel with a module (Mod) of 4, a face width (thickness) of 35mm (~1.38 in), and a bore sized to accept a standard shaft. Tooth counts range from 10 to 35 teeth across variants, giving pitch circle diameters from approximately 40mm (~1.57 in) for 10T up to 140mm (~5.51 in) for 35T. The tooth profile follows the standard 20° pressure angle involute form for smooth, low-noise meshing.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include CNC rack-and-pinion drive axes, 3D printer extruder and Z-axis assemblies, robotic joint actuators, and custom gearbox builds where a 4 Mod pinion gear with consistent tooth geometry is required for long-term accuracy.\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 4 Mod (Module 4) spur gear or rack. Verify bore diameter and keyway requirements against your shaft before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These 4 Mod Steel Spur Gears\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eCarbon Steel Construction\u003c\/strong\u003e — Machined from solid carbon steel for strength and wear resistance in continuous-duty drive applications.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eModule 4 Standard Tooth Profile\u003c\/strong\u003e — 20° pressure angle involute teeth mesh cleanly with any standard 4 Mod mating gear or rack, ensuring predictable gear ratios.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n        \u003cstrong\u003e35mm Face Width\u003c\/strong\u003e — The 35mm (~1.38 in) tooth face provides a wide contact area that distributes load evenly and reduces tooth stress under torque.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eWide Tooth Count Selection (10–35 Teeth)\u003c\/strong\u003e — Choose the exact tooth count to achieve your target gear ratio without custom machining or compromise.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eConsistent Bore for Shaft Mounting\u003c\/strong\u003e — Each gear features a machined center bore suitable for standard shaft diameters; confirm bore size against your variant before ordering.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\n        \u003cstrong\u003eSuitable for CNC, 3D Printing \u0026amp; Robotics\u003c\/strong\u003e — Designed for precision motion control environments including CNC routers, 3D printer drive trains, and robotic actuator assemblies.\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — 4 Mod Steel Spur Gears\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule (Mod)\u003c\/th\u003e\n\u003ctd\u003e4\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\u003eFace Width (Thickness)\u003c\/th\u003e\n\u003ctd\u003e35mm (~1.38 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e10 – 35 Teeth (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePitch Circle Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (Mod × Teeth)\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\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\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eCNC, 3D Printer, Robotics, Custom Gearbox\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\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\u003eYour gear ratio is determined by dividing the tooth count of the driven gear by the tooth count of the driving (pinion) gear. For example, pairing a 10-tooth pinion with a 30-tooth gear gives a 3:1 reduction. Select the tooth count that achieves your target ratio while keeping the pitch circle diameter within your available space. The pitch circle diameter equals Module × Tooth Count, so a 4 Mod 15-tooth gear has a 60mm pitch circle diameter.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat module do these gears use, and will they mesh with my existing gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are Module 4 (Mod 4). They will mesh correctly with any other standard Mod 4 spur gear or Mod 4 rack, regardless of brand, as long as the pressure angle is also 20°. Module is not interchangeable — a Mod 4 gear will not mesh properly with a Mod 3 or Mod 5 gear.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat material are these spur gears made from, and how strong are they?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are machined from carbon steel, which offers a good balance of tensile strength, machinability, and wear resistance for general-purpose power transmission. Carbon steel spur gears are suitable for moderate-to-high torque applications in CNC machines, 3D printers, and robotic systems. For very high-speed or corrosive environments, consider whether a surface treatment or alternative material is needed for your specific use case.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these gears corrosion-resistant? Can I use them outdoors or in humid environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCarbon steel is not inherently corrosion-resistant. For outdoor, humid, or wet environments, we recommend applying a rust-inhibiting lubricant or grease to the gear teeth and bore, or considering a stainless steel or coated alternative. For indoor CNC and 3D printer use in normal workshop conditions, standard lubrication maintenance is sufficient.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore diameter does the gear have? Will it fit my shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBore diameter varies by variant and tooth count. Please check the specific variant listing or contact us to confirm the bore size before ordering. If your shaft requires a keyway or set-screw hole, verify this is included in the variant you select. Custom bore machining may be required for non-standard shaft sizes.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\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. These 4 Mod steel spur gears are well-suited for 3D printer drive systems, including Z-axis lead screw drives and extruder gear trains, where a Mod 4 pinion is specified. The 35mm face width provides ample contact area for the torque levels typical in desktop and industrial 3D printers. Confirm the tooth count and bore diameter match your printer's drive specification before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I calculate the center distance between two meshing gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCenter distance = (Pitch Circle Diameter of Gear 1 + Pitch Circle Diameter of Gear 2) ÷ 2. Since PCD = Module × Teeth, for a 4 Mod 15T pinion meshing with a 4 Mod 30T gear: PCD1 = 60mm, PCD2 = 120mm, center distance = (60 + 120) ÷ 2 = 90mm. Use this formula to set your shaft spacing accurately in your design.\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\": \"Your gear ratio is determined by dividing the tooth count of the driven gear by the tooth count of the driving (pinion) gear. The pitch circle diameter equals Module × Tooth Count, so a 4 Mod 15-tooth gear has a 60mm pitch circle diameter. Select the tooth count that achieves your target ratio while keeping the pitch circle diameter within your available space.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What module do these gears use, and will they mesh with my existing gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears are Module 4 (Mod 4). They will mesh correctly with any other standard Mod 4 spur gear or Mod 4 rack with a 20° pressure angle. Module is not interchangeable — a Mod 4 gear will not mesh properly with a Mod 3 or Mod 5 gear.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What material are these spur gears made from, and how strong are they?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears are machined from carbon steel, offering a good balance of tensile strength, machinability, and wear resistance for moderate-to-high torque applications in CNC machines, 3D printers, and robotic systems.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears corrosion-resistant? Can I use them outdoors or in humid environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Carbon steel is not inherently corrosion-resistant. For outdoor or humid environments, apply a rust-inhibiting lubricant or grease. For indoor workshop use, standard lubrication maintenance is sufficient.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore diameter does the gear have? Will it fit my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bore diameter varies by variant and tooth count. Please check the specific variant listing or contact us to confirm the bore size before ordering.\"\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. These 4 Mod steel spur gears are well-suited for 3D printer drive systems including Z-axis lead screw drives and extruder gear trains where a Mod 4 pinion is specified. Confirm the tooth count and bore diameter match your printer's drive specification before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I calculate the center distance between two meshing gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Center distance = (PCD1 + PCD2) ÷ 2. Since PCD = Module × Teeth, for a 4 Mod 15T pinion meshing with a 4 Mod 30T gear: center distance = (60 + 120) ÷ 2 = 90mm.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"4Mod 10Teeth","offer_id":52443359772946,"sku":"GLFBLFFGLBZSJ058241x1","price":29.06,"currency_code":"USD","in_stock":true},{"title":"4Mod 11Teeth","offer_id":52443359805714,"sku":"GLFBLFFGLBZSJ058242x1","price":34.73,"currency_code":"USD","in_stock":true},{"title":"4Mod 12Teeth","offer_id":52443359838482,"sku":"GLFBLFFGLBZSJ058243x1","price":43.42,"currency_code":"USD","in_stock":true},{"title":"4Mod 13Teeth","offer_id":52443359871250,"sku":"GLFBLFFGLBZSJ058244x1","price":46.46,"currency_code":"USD","in_stock":true},{"title":"4Mod 14Teeth","offer_id":52443359904018,"sku":"GLFBLFFGLBZSJ058245x1","price":62.67,"currency_code":"USD","in_stock":true},{"title":"4Mod 15Teeth","offer_id":52443359936786,"sku":"GLFBLFFGLBZSJ058246x1","price":65.57,"currency_code":"USD","in_stock":true},{"title":"4Mod 16Teeth","offer_id":52443359969554,"sku":"GLFBLFFGLBZSJ058247x1","price":73.11,"currency_code":"USD","in_stock":true},{"title":"4Mod 17Teeth","offer_id":52443360002322,"sku":"GLFBLFFGLBZSJ058248x1","price":76.32,"currency_code":"USD","in_stock":true},{"title":"4Mod 18Teeth","offer_id":52443360035090,"sku":"GLFBLFFGLBZSJ058249x1","price":96.52,"currency_code":"USD","in_stock":true},{"title":"4Mod 19Teeth","offer_id":52443360067858,"sku":"GLFBLFFGLBZSJ058250x1","price":102.75,"currency_code":"USD","in_stock":true},{"title":"4Mod 20Teeth","offer_id":52443360100626,"sku":"GLFBLFFGLBZSJ058251x1","price":103.33,"currency_code":"USD","in_stock":true},{"title":"4Mod 21Teeth","offer_id":52443360133394,"sku":"GLFBLFFGLBZSJ058252x1","price":124.25,"currency_code":"USD","in_stock":true},{"title":"4Mod 22Teeth","offer_id":52443360166162,"sku":"GLFBLFFGLBZSJ058253x1","price":132.31,"currency_code":"USD","in_stock":true},{"title":"4Mod 23Teeth","offer_id":52443360198930,"sku":"GLFBLFFGLBZSJ058254x1","price":137.47,"currency_code":"USD","in_stock":true},{"title":"4Mod 24Teeth","offer_id":52443360231698,"sku":"GLFBLFFGLBZSJ058255x1","price":142.98,"currency_code":"USD","in_stock":true},{"title":"4Mod 25Teeth","offer_id":52443360264466,"sku":"GLFBLFFGLBZSJ058256x1","price":275.6,"currency_code":"USD","in_stock":true},{"title":"4Mod 26Teeth","offer_id":52443360297234,"sku":"GLFBLFFGLBZSJ058257x1","price":289.07,"currency_code":"USD","in_stock":true},{"title":"4Mod 27Teeth","offer_id":52443360330002,"sku":"GLFBLFFGLBZSJ058258x1","price":306.08,"currency_code":"USD","in_stock":true},{"title":"4Mod 28Teeth","offer_id":52443360362770,"sku":"GLFBLFFGLBZSJ058259x1","price":318.78,"currency_code":"USD","in_stock":true},{"title":"4Mod 29Teeth","offer_id":52443360395538,"sku":"GLFBLFFGLBZSJ058260x1","price":335.68,"currency_code":"USD","in_stock":true},{"title":"4Mod 31Teeth","offer_id":52443360428306,"sku":"GLFBLFFGLBZSJ058261x1","price":361.15,"currency_code":"USD","in_stock":true},{"title":"4Mod 30Teeth","offer_id":52443360461074,"sku":"GLFBLFFGLBZSJ058262x1","price":350.5,"currency_code":"USD","in_stock":true},{"title":"4Mod 32Teeth","offer_id":52443360493842,"sku":"GLFBLFFGLBZSJ058263x1","price":386.82,"currency_code":"USD","in_stock":true},{"title":"4Mod 33Teeth","offer_id":52443360526610,"sku":"GLFBLFFGLBZSJ058264x1","price":388.17,"currency_code":"USD","in_stock":true},{"title":"4Mod 34Teeth","offer_id":52443360559378,"sku":"GLFBLFFGLBZSJ058265x1","price":412.52,"currency_code":"USD","in_stock":true},{"title":"4Mod 35Teeth","offer_id":52443360592146,"sku":"GLFBLFFGLBZSJ058266x1","price":432.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-04_7bbb8ff4-b502-4722-9c90-f2899c7f8f49.jpg?v=1784112055","url":"https:\/\/homediyer.com\/products\/4-modul-steel-spur-gears-pinion-gear-thick-35mm-10-55-teeth-for-3d-cnc","provider":"HomeDIYer","version":"1.0","type":"link"}