{"product_id":"module-1-5-pinion-spur-gears-45-steel-12t-to-80t-metal-no-step-transmission-cnc","title":"Module 1.5 Pinion Spur Gears #45 Steel 12T to 80T Metal No-step Transmission CNC","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 1.5 Spur Gears — Precision #45 Steel Pinion for CNC \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or mismatched gear brings your CNC router, 3D printer, or automation rig to a halt, you need a replacement you can trust to mesh cleanly and hold torque without play. These Module 1.5 pinion spur gears are engineered for makers, machine builders, and small-batch manufacturers who demand consistent, repeatable motion from every drivetrain component.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from #45 carbon steel — a medium-carbon alloy known for its balanced hardness and toughness — and features a no-step (flush-hub) profile that simplifies shaft mounting. The module 1.5 pitch standard means tooth geometry is uniform across the full range: outer diameters scale predictably from approximately 21 mm (0.83 in) at 12T up to approximately 123 mm (4.84 in) at 80T, with a consistent 1.5 mm pitch and standard 20° pressure angle throughout.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CNC rack-and-pinion linear drives for router gantries, gear-reduction stages in robotic joint actuators, and motor-output pinions in conveyor or indexing systems — anywhere a reliable module 1.5 metal spur gear is required for no-step transmission.\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 1.5 gear systems with a 20° pressure angle. Pairs with Module 1.5 racks, mating spur gears, and standard metric bore shafts. Confirm bore diameter against your shaft spec before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Module 1.5 Spur Gears\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n  \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e#45 Carbon Steel Construction\u003c\/strong\u003e — Medium-carbon steel delivers the hardness needed to resist tooth wear under sustained load while remaining machinable for bore modifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eNo-Step (Flush-Hub) Profile\u003c\/strong\u003e — The smooth, step-free hub face allows compact axial positioning and reduces interference in tight gear-train assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eModule 1.5 \/ 20° Pressure Angle Standard\u003c\/strong\u003e — Fully interchangeable with any Module 1.5 rack or mating gear, ensuring drop-in compatibility across CNC and automation platforms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Tooth-Count Range (12T – 80T)\u003c\/strong\u003e — A single product line covers small high-speed pinions through large reduction gears, letting you dial in the exact gear ratio your drivetrain needs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\u003cstrong\u003eCNC-Machined Tooth Profile\u003c\/strong\u003e — Precision-cut teeth provide consistent pitch accuracy, smooth meshing, and reduced backlash compared to cast or sintered alternatives.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eBroad Application Fit\u003c\/strong\u003e — Suited for CNC rack-and-pinion drives, robotic joint reduction stages, conveyor indexing systems, and general-purpose no-step transmission assemblies.\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 1.5 Spur Gears\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\u003ePressure Angle\u003c\/th\u003e\n\u003ctd\u003e20°\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e#45 Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e12T – 80T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\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\u003eHub Style\u003c\/th\u003e\n\u003ctd\u003eNo-step (flush hub)\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\u003ePitch\u003c\/th\u003e\n\u003ctd\u003e1.5 mm module\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\u003ePacking Quantity\u003c\/th\u003e\n\u003ctd\u003e1 Pcs per order\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\u003eSelect your tooth count based on the gear ratio you need. Divide the driven gear's tooth count by the driving pinion's tooth count to get the reduction ratio. For CNC rack-and-pinion drives, also factor in the rack pitch to calculate linear travel per motor revolution. Use a smaller tooth count (e.g., 12T–20T) for higher speed, and a larger count (e.g., 60T–80T) for higher torque output.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the outer diameter for a specific tooth count?\u003c\/summary\u003e\n  \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor Module 1.5 gears, the pitch diameter equals the tooth count multiplied by the module (T × 1.5 mm), and the outer diameter (addendum circle) is approximately (T + 2) × 1.5 mm. For example, a 40T gear has an OD of approximately 63 mm (2.48 in). Please confirm exact dimensions from the variant detail page or contact us before designing your housing.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eAre these gears compatible with Module 1.5 racks?\u003c\/summary\u003e\n  \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. These gears follow the standard Module 1.5 involute tooth profile with a 20° pressure angle, making them directly compatible with any Module 1.5 rack or mating spur gear that uses the same standard. Always verify the pressure angle matches (20°) before pairing with third-party components.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eHow strong are #45 steel spur gears under load?\u003c\/summary\u003e\n  \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e#45 carbon steel (roughly equivalent to AISI 1045) has a tensile strength of approximately 600–800 MPa in its normalized state, making it suitable for moderate-to-heavy duty mechanical drives. For high-cycle or high-shock applications, consider whether additional heat treatment or a higher-alloy steel would be appropriate for your specific load conditions.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eDo these gears resist corrosion?\u003c\/summary\u003e\n  \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e#45 carbon steel is not inherently corrosion-resistant. For environments with moisture, coolant exposure, or outdoor use, we recommend applying a light machine oil coating during storage and operation, or selecting a stainless-steel or surface-treated alternative. Contact us to confirm available finish options for your variant.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eCan I modify the bore diameter to fit my shaft?\u003c\/summary\u003e\n  \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. #45 carbon steel is machinable, so the bore can be enlarged or keyway-cut by a machine shop to match your shaft diameter. Ensure the remaining wall thickness after boring is sufficient for your torque load. Contact us to confirm the standard bore diameter for your selected tooth count before planning any machining.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n  \u003csummary\u003eWhat applications are these module 1.5 pinion gears best suited for?\u003c\/summary\u003e\n  \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese gears are well-suited for CNC router rack-and-pinion gantry drives, robotic joint reduction stages, 3D printer extruder or axis drives, conveyor indexing systems, and general-purpose no-step transmission assemblies where a standard metric module 1.5 spur gear is specified.\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 Number of teeth 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\": \"Select your tooth count based on the gear ratio you need. Divide the driven gear's tooth count by the driving pinion's tooth count to get the reduction ratio. For CNC rack-and-pinion drives, also factor in the rack pitch to calculate linear travel per motor revolution. Use a smaller tooth count (e.g., 12T–20T) for higher speed, and a larger count (e.g., 60T–80T) for higher torque output.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the outer diameter for a specific tooth count?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For Module 1.5 gears, the pitch diameter equals the tooth count multiplied by the module (T × 1.5 mm), and the outer diameter is approximately (T + 2) × 1.5 mm. For example, a 40T gear has an OD of approximately 63 mm (2.48 in). Confirm exact dimensions from the variant detail page or contact us.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these gears compatible with Module 1.5 racks?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. These gears follow the standard Module 1.5 involute tooth profile with a 20° pressure angle, making them directly compatible with any Module 1.5 rack or mating spur gear using the same standard.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are #45 steel spur gears under load?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"#45 carbon steel has a tensile strength of approximately 600–800 MPa in its normalized state, suitable for moderate-to-heavy duty mechanical drives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do these gears resist corrosion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"#45 carbon steel is not inherently corrosion-resistant. Apply a light machine oil coating for moisture or coolant environments, or contact us for surface-treated alternatives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I modify the bore diameter to fit my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. #45 carbon steel is machinable and the bore can be enlarged or keyway-cut by a machine shop. Contact us to confirm the standard bore diameter for your selected tooth count before machining.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What applications are these module 1.5 pinion gears best suited for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These gears are well-suited for CNC router rack-and-pinion gantry drives, robotic joint reduction stages, 3D printer axis drives, conveyor indexing systems, and general-purpose no-step transmission assemblies.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"1.5M 12T \/ 1 Pcs","offer_id":52442497515794,"sku":"FAS057678x1","price":10.69,"currency_code":"USD","in_stock":true},{"title":"1.5M 27T \/ 1 Pcs","offer_id":52442497548562,"sku":"FAS057693x1","price":28.03,"currency_code":"USD","in_stock":true},{"title":"1.5M 28T \/ 1 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