{"product_id":"cylindrical-spur-gear-4mod-24-52t-motor-pinion","title":"Cylindrical Spur Gear 4Mod 24-52T 12.56mm Tooth Pitch 104-216mm OD Motor Pinion","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eCylindrical Spur Gear 4 Mod — Precision Motor Pinion Drive for Makers \u0026amp; Engineers\u003c\/h2\u003e\n    \u003cp\u003eWhen your build demands reliable torque transfer and repeatable mesh accuracy, undersized or mismatched gears become an immediate bottleneck. Whether you are a robotics engineer, CNC hobbyist, or automation integrator, these 4 Module cylindrical spur gears deliver the dimensional consistency and load capacity your drivetrain requires.\u003c\/p\u003e\n    \u003cp\u003eEach gear is machined to a 4 Mod (Module 4) standard with a 12.56 mm tooth pitch. The available tooth range spans 24T through 52T, corresponding to outer diameters from 104 mm (approx. 4.09 in) to 216 mm (approx. 8.50 in). Bore diameter and keyway dimensions vary by tooth count — see variant options for exact bore specs.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include motor pinion drive systems in industrial automation, gear reduction stages for servo and stepper motor assemblies, and custom gearbox builds for robotics platforms and CNC axis drives where a 4 Mod gear train is specified.\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 to mesh with any standard Module 4 (Mod 4) spur gear, rack, or pinion. Verify center distance and face width before pairing with existing drivetrain components.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These Cylindrical 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\u003eModule 4 Standard Tooth Profile\u003c\/strong\u003e\u003cbr\u003e\n        12.56 mm tooth pitch ensures direct interchangeability with any Mod 4 mating gear, rack, or pinion in your drivetrain.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔢\u003c\/span\u003e\n        \u003cstrong\u003eWide Tooth Count Selection — 24T to 52T\u003c\/strong\u003e\u003cbr\u003e\n        Choose from 28 tooth-count variants (24T through 52T) to dial in your exact gear ratio without custom machining.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n        \u003cstrong\u003eOuter Diameter Range 104–216 mm\u003c\/strong\u003e\u003cbr\u003e\n        OD scales linearly with tooth count (104 mm at 24T up to 216 mm at 52T), making ratio calculations and center-distance layout straightforward.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\n        \u003cstrong\u003eCylindrical Spur Geometry for Efficient Power Transfer\u003c\/strong\u003e\u003cbr\u003e\n        Straight-tooth spur geometry minimizes axial thrust loads, simplifying bearing selection and shaft design in motor pinion applications.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eMachined Bore \u0026amp; Keyway Ready\u003c\/strong\u003e\u003cbr\u003e\n        Each gear ships with a finished bore sized to the tooth count variant. Keyway dimensions available — see variant options or contact us to confirm fit with your shaft.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\n        \u003cstrong\u003eSuited for Robotics, CNC \u0026amp; Automation Builds\u003c\/strong\u003e\u003cbr\u003e\n        Dimensionally consistent across the range, these gears integrate cleanly into servo motor pinion drives, stepper-driven axis assemblies, and custom gearbox stages.\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 — Cylindrical Spur Gear\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\u003eTooth Pitch\u003c\/th\u003e\n\u003ctd\u003e12.56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTooth Count Range\u003c\/th\u003e\n\u003ctd\u003e24T – 52T (28 variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter Range\u003c\/th\u003e\n\u003ctd\u003e104 mm – 216 mm (4.09 in – 8.50 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\u003eGear Type\u003c\/th\u003e\n\u003ctd\u003eCylindrical Spur Gear\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\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\u003eFace Width\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHub Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish \/ Treatment\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\u003eSelect your tooth count based on the gear ratio you need and the available center distance in your assembly. Divide the driver tooth count by the driven tooth count to get your ratio. For a Module 4 gear pair, center distance (mm) = (T1 + T2) × 2. Use the OD values listed in each variant to verify physical clearance before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this gear mesh with my existing Module 4 rack or pinion?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — any gear, rack, or pinion manufactured to the Module 4 standard with a 20° pressure angle will mesh correctly with these gears. Confirm the face width of your mating component is compatible and that center distance is set accurately to avoid backlash or binding.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat material are these spur gears made from?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMaterial varies by variant. Please refer to the variant options on this page or contact us to confirm the specific material (e.g., steel, aluminum alloy) for the tooth count you need. Material choice affects load capacity, weight, and corrosion resistance.\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\u003eCorrosion resistance depends on the material and surface treatment of the specific variant. Steel variants may have an oxide or zinc treatment; aluminum variants offer inherent corrosion resistance. Contact us to confirm the finish for your selected tooth count if operating in a humid or outdoor environment.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore diameter and keyway size should I expect?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBore diameter and keyway dimensions are sized to the tooth count variant. These details are listed in the variant options. If you need a custom bore or keyway to match a specific shaft diameter, contact us before ordering to discuss machining options.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these gears in a high-torque motor pinion drive?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eModule 4 spur gears are well-suited for moderate-to-high torque motor pinion applications. Load capacity depends on material, face width, and operating speed. For demanding applications, select a larger tooth count (higher OD) to distribute load across more tooth contact area, and verify the material rating against your torque requirements.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I verify the gear fits my CNC or robotics build before purchasing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCheck three key dimensions: (1) outer diameter against your housing clearance, (2) bore diameter against your shaft size, and (3) center distance between your shaft and the mating gear shaft. All OD values are listed per variant (104 mm to 216 mm). Contact us with your shaft diameter and we can confirm bore compatibility.\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 (OD) 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 and the available center distance in your assembly. Divide the driver tooth count by the driven tooth count to get your ratio. For a Module 4 gear pair, center distance (mm) = (T1 + T2) × 2.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this gear mesh with my existing Module 4 rack or pinion?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — any gear, rack, or pinion manufactured to the Module 4 standard with a 20° pressure angle will mesh correctly with these gears.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What material are these spur gears made from?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Material varies by variant. 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Contact us if you need a custom bore or keyway.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these gears in a high-torque motor pinion drive?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Module 4 spur gears are well-suited for moderate-to-high torque motor pinion applications. Load capacity depends on material, face width, and operating speed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I verify the gear fits my CNC or robotics build before purchasing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Check outer diameter against housing clearance, bore diameter against shaft size, and center distance between shafts. All OD values are listed per variant (104 mm to 216 mm).\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"4 Mod \/ 33T (140mm)","offer_id":52442795868434,"sku":"GLFBLFFSHXJZC4643x1","price":291.46,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 34T (144mm)","offer_id":52442795901202,"sku":"GLFBLFFSHXJZC4644x1","price":307.37,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 35T (148mm)","offer_id":52442795933970,"sku":"GLFBLFFSHXJZC4645x1","price":322.14,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 36T (152mm)","offer_id":52442795966738,"sku":"GLFBLFFSHXJZC4646x1","price":334.67,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 37T (156mm)","offer_id":52442795999506,"sku":"GLFBLFFSHXJZC4647x1","price":350.59,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 38T (160mm)","offer_id":52442796032274,"sku":"GLFBLFFSHXJZC4648x1","price":364.24,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 39T (164mm)","offer_id":52442796065042,"sku":"GLFBLFFSHXJZC4649x1","price":381.87,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 40T (168mm)","offer_id":52442796097810,"sku":"GLFBLFFSHXJZC4650x1","price":399.49,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 24T (104mm)","offer_id":52442796130578,"sku":"GLFBLFFSHXJZC4683x1","price":186.84,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 25T (108mm)","offer_id":52442796163346,"sku":"GLFBLFFSHXJZC4684x1","price":197.06,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 26T (112mm)","offer_id":52442796196114,"sku":"GLFBLFFSHXJZC4685x1","price":206.16,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 27T (116mm)","offer_id":52442796228882,"sku":"GLFBLFFSHXJZC4686x1","price":215.26,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 28T (120mm)","offer_id":52442796261650,"sku":"GLFBLFFSHXJZC4687x1","price":226.63,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 29T (124mm)","offer_id":52442796294418,"sku":"GLFBLFFSHXJZC4688x1","price":240.86,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 30T (128mm)","offer_id":52442796327186,"sku":"GLFBLFFSHXJZC4689x1","price":252.8,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 31T (132mm)","offer_id":52442796359954,"sku":"GLFBLFFSHXJZC4690x1","price":265.28,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 32T (136mm)","offer_id":52442796392722,"sku":"GLFBLFFSHXJZC4691x1","price":277.25,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 41T (172mm)","offer_id":52442796425490,"sku":"GLFBLFFSHXJZC4873x1","price":417.7,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 42T (176mm)","offer_id":52442796458258,"sku":"GLFBLFFSHXJZC4874x1","price":431.34,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 43T (180mm)","offer_id":52442796491026,"sku":"GLFBLFFSHXJZC4875x1","price":448.39,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 44T (184mm)","offer_id":52442796523794,"sku":"GLFBLFFSHXJZC4876x1","price":468.3,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 45T (188mm)","offer_id":52442796556562,"sku":"GLFBLFFSHXJZC4877x1","price":484.21,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 46T (192mm)","offer_id":52442796589330,"sku":"GLFBLFFSHXJZC4878x1","price":509.24,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 47T (196mm)","offer_id":52442796622098,"sku":"GLFBLFFSHXJZC4879x1","price":526.29,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 48T (200mm)","offer_id":52442796654866,"sku":"GLFBLFFSHXJZC4880x1","price":545.05,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 49T (204mm)","offer_id":52442796687634,"sku":"GLFBLFFSHXJZC4881x1","price":572.93,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 50T (208mm)","offer_id":52442796720402,"sku":"GLFBLFFSHXJZC4882x1","price":592.25,"currency_code":"USD","in_stock":true},{"title":"4 Mod \/ 52T (216mm)","offer_id":52442796753170,"sku":"GLFBLFFSHXJZC4883x1","price":635.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of4_b79b7469-5ec3-4b30-b87a-c86c926e726d.jpg?v=1783594501","url":"https:\/\/homediyer.com\/products\/cylindrical-spur-gear-4mod-24-52t-motor-pinion","provider":"HomeDIYer","version":"1.0","type":"link"}