{"product_id":"spur-gears-pinion-gear-1-5-mod-transmission-gear-with-step-30-45-teeth-45-steel","title":"Spur Gears Pinion Gear 1.5 Mod Transmission Gear With Step 30-45 Teeth 45# Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e1.5 Mod Spur Pinion Gear with Step — Reliable Transmission for DIY Drives \u0026amp; Automation\u003c\/h2\u003e\n    \u003cp\u003eWhen a motion-control project demands a compact, precisely cut spur pinion gear that fits a stepped shaft without slipping, choosing the wrong module or bore size wastes hours of rework. Makers, robotics builders, and small-machine designers who need a 1.5 mod spur pinion gear with a stepped hub will find this range covers the most common shaft and tooth-count combinations in a single listing.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined from 45# carbon steel — a medium-carbon structural steel known for its balance of hardness and machinability. The stepped hub design integrates a larger-diameter collar (step diameter 25–45 mm \/ ~0.98–1.77 in) behind the gear face, providing a positive axial stop and extra bearing surface. Bore diameters span 6–25 mm (~0.24–0.98 in), and tooth counts run from 30 T to 45 T at a 1.5 module pitch.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include DIY CNC axis drives where a 1.5 mod pinion gear meshes with a rack or larger wheel, small conveyor and indexing systems requiring a stepped-bore spur gear for positive shaft location, and robotics joint drives where a 30–45 tooth spur gear delivers the right speed-reduction ratio without excessive bulk.\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 1.5 module (Mod 1.5) spur gear or rack. Confirm bore diameter and step diameter match your shaft and housing before ordering.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These 1.5 Mod Spur Pinion Gears with Step\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n      \u003cstrong\u003e45# Carbon Steel Construction\u003c\/strong\u003e\n      \u003cp\u003eMachined from 45# carbon steel for a solid combination of wear resistance and machinability, suitable for moderate-load transmission applications.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n      \u003cstrong\u003e1.5 Module Pitch\u003c\/strong\u003e\n      \u003cp\u003eStandard Mod 1.5 tooth profile ensures direct mesh compatibility with any 1.5 module spur gear, rack, or pinion in your drivetrain.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n      \u003cstrong\u003eStepped Hub for Positive Shaft Location\u003c\/strong\u003e\n      \u003cp\u003eThe integrated step collar (25–45 mm diameter) acts as a built-in axial stop, reducing the need for additional retaining hardware on the shaft.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n      \u003cstrong\u003eWide Tooth Count Selection: 30 T – 45 T\u003c\/strong\u003e\n      \u003cp\u003eFour tooth counts (30 T, 35 T, 40 T, 45 T) let you dial in the gear ratio you need without sourcing from multiple suppliers.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n      \u003cstrong\u003eMultiple Bore Diameters: 6–25 mm\u003c\/strong\u003e\n      \u003cp\u003eNine bore options from 6 mm to 25 mm cover the most common motor and gearbox output shaft sizes used in DIY and light-industrial builds.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n      \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e\n      \u003cp\u003eAvailable in 1, 2, 3, or 5-piece packs so you can stock spares or equip a multi-axis machine in a single order.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — 1.5 Mod Spur Pinion Gear\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1.5 Mod\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Teeth\u003c\/th\u003e\n\u003ctd\u003e30 T \/ 35 T \/ 40 T \/ 45 T (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e6 \/ 8 \/ 10 \/ 12 \/ 15 \/ 16 \/ 17 \/ 20 \/ 25 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eStep Diameter\u003c\/th\u003e\n\u003ctd\u003e25 \/ 35 \/ 40 \/ 45 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e45# Carbon Steel\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\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eSpur Gear (straight tooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHub Style\u003c\/th\u003e\n\u003ctd\u003eStepped hub with integrated collar\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\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 \/ 2 \/ 3 \/ 5 pcs (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Pitch\u003c\/th\u003e\n\u003ctd\u003eMod 1.5 spur gears and racks\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. Divide the driven gear's tooth count by this pinion's tooth count to get the reduction ratio. For example, pairing a 30 T pinion with a 90 T wheel gives a 3:1 reduction. Higher tooth counts on the pinion reduce the ratio and increase output speed; lower tooth counts increase torque multiplication.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich bore diameter should I select for my motor shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor or gearbox output shaft diameter with a caliper and select the matching bore. Available bores are 6, 8, 10, 12, 15, 16, 17, 20, and 25 mm. If your shaft uses a keyway, confirm the bore is large enough to accommodate the key after machining — contact us to confirm before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does the step diameter mean, and why does it matter?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe step diameter refers to the larger-diameter collar machined behind the gear face. It acts as a built-in axial stop against a bearing face or housing shoulder, preventing the gear from sliding along the shaft under thrust loads. Match the step diameter to your housing bore or bearing inner race for a clean fit.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear mesh with my existing Mod 1.5 rack or wheel?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — any gear or rack with a 1.5 module (Mod 1.5) and a standard 20° pressure angle will mesh correctly with this pinion. Module and pressure angle must both match for proper engagement. Do not mix with Mod 1.0, Mod 2.0, or DP (diametral pitch) gears.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong is 45# carbon steel for gear applications?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel (equivalent to C45 \/ SAE 1045) has a tensile strength of approximately 600–800 MPa in the normalized condition and can be heat-treated to increase surface hardness. It is well-suited for moderate-load, moderate-speed spur gear applications such as DIY CNC drives, conveyor systems, and robotics joints. For very high-load or high-speed applications, consider gears made from alloy steel or with surface hardening.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this gear corrosion-resistant for outdoor or humid environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e45# carbon steel is not inherently corrosion-resistant. For outdoor, humid, or washdown environments, apply a rust-inhibiting grease or coating after installation, or consider stainless steel alternatives. Regular lubrication will significantly extend service life in moderately damp conditions.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I order a single piece to test fit before buying a larger quantity?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — each variant is available in a 1-piece pack, making it straightforward to verify fit and mesh quality before committing to a 3 or 5-piece order. Simply select your tooth count, bore diameter, step diameter, and \"1 Pcs\" from the quantity option.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat lubrication is recommended for these spur gears?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA light machine oil or gear grease with an NLGI Grade 1–2 rating is suitable for most low-to-medium speed applications. For enclosed gearboxes, use an ISO VG 220 gear oil. Reapply lubrication periodically based on operating hours and load conditions to minimize wear.\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, bore diameter, step diameter, and pack quantity 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. Divide the driven gear's tooth count by this pinion's tooth count to get the reduction ratio. For example, pairing a 30 T pinion with a 90 T wheel gives a 3:1 reduction. Higher tooth counts on the pinion reduce the ratio and increase output speed; lower tooth counts increase torque multiplication.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which bore diameter should I select for my motor shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure your motor or gearbox output shaft diameter with a caliper and select the matching bore. Available bores are 6, 8, 10, 12, 15, 16, 17, 20, and 25 mm. If your shaft uses a keyway, confirm the bore is large enough to accommodate the key after machining.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does the step diameter mean, and why does it matter?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The step diameter refers to the larger-diameter collar machined behind the gear face. It acts as a built-in axial stop against a bearing face or housing shoulder, preventing the gear from sliding along the shaft under thrust loads.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing Mod 1.5 rack or wheel?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — any gear or rack with a 1.5 module (Mod 1.5) and a standard 20° pressure angle will mesh correctly with this pinion. Module and pressure angle must both match for proper engagement.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is 45# carbon steel for gear applications?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel (equivalent to C45 \/ SAE 1045) has a tensile strength of approximately 600–800 MPa in the normalized condition and can be heat-treated to increase surface hardness. It is well-suited for moderate-load, moderate-speed spur gear applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this gear corrosion-resistant for outdoor or humid environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"45# carbon steel is not inherently corrosion-resistant. For outdoor or humid environments, apply a rust-inhibiting grease or coating after installation, or consider stainless steel alternatives.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I order a single piece to test fit before buying a larger quantity?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — each variant is available in a 1-piece pack, making it straightforward to verify fit and mesh quality before committing to a 3 or 5-piece order.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What lubrication is recommended for these spur gears?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A light machine oil or gear grease with an NLGI Grade 1–2 rating is suitable for most low-to-medium speed applications. For enclosed gearboxes, use an ISO VG 220 gear oil.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"30T \/ 10mm \/ 35mm \u0026 1 Pcs","offer_id":52443334017298,"sku":"GLFBBYWHK-KCSJ2891x1","price":22.21,"currency_code":"USD","in_stock":true},{"title":"30T \/ 10mm \/ 35mm \u0026 3 Pcs","offer_id":52443334050066,"sku":"GLFBBYWHK-KCSJ2891x3","price":64.0,"currency_code":"USD","in_stock":true},{"title":"30T \/ 10mm \/ 35mm \u0026 5 Pcs","offer_id":52443334082834,"sku":"GLFBBYWHK-KCSJ2891x5","price":105.85,"currency_code":"USD","in_stock":true},{"title":"30T \/ 12mm \/ 35mm \u0026 1 Pcs","offer_id":52443334115602,"sku":"GLFBBYWHK-KCSJ2892x1","price":22.21,"currency_code":"USD","in_stock":true},{"title":"30T \/ 12mm \/ 35mm \u0026 3 Pcs","offer_id":52443334148370,"sku":"GLFBBYWHK-KCSJ2892x3","price":64.0,"currency_code":"USD","in_stock":true},{"title":"30T \/ 12mm \/ 35mm \u0026 5 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