{"product_id":"brass-spur-gear-module-1-hub-15-50-tooth-bore-4-12mm","title":"Brass Spur Gear Module 1 with Hub 15-50 Tooth Motor Pinion Bore 4-12mm Precision","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eBrass Module 1 Spur Gear with Hub — Precision Pinion for Motors \u0026amp; Drives\u003c\/h2\u003e\n\u003cp\u003eWhen a mismatched gear bore or imprecise tooth count causes slippage, vibration, or premature wear in your drive train, the entire mechanism suffers. Engineers, robotics builders, and DIY automation enthusiasts need a reliable module 1 spur gear with hub that fits their motor shaft exactly — without custom machining or guesswork.\u003c\/p\u003e\n\u003cp\u003eThis brass spur gear is machined to Module 1 (1mm pitch) standards, featuring an integrated hub for secure shaft mounting. The tooth range spans 15 to 50 teeth, and bore sizes run from 4 mm (~0.16 in) to 12 mm (~0.47 in), covering the most common small motor shaft diameters. The brass construction provides good machinability, moderate corrosion resistance, and low magnetic interference.\u003c\/p\u003e\n\u003cp\u003eTypical applications include small DC motor pinion drives in robotics and automation rigs, CNC axis drives requiring precise gear ratios, and educational or prototyping platforms where a brass module 1 spur gear with hub offers easy modification and reliable meshing with standard module 1 racks or mating gears.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e Compatible with all standard \u003cstrong\u003eModule 1\u003c\/strong\u003e spur gears, racks, and pinions. Verify shaft diameter before ordering — bore sizes available: 4 \/ 5 \/ 6 \/ 7 \/ 8 \/ 10 \/ 12 mm.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Brass Module 1 Spur Gears with Hub\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eIntegrated Hub Design\u003c\/strong\u003e\u003cp\u003eThe extended hub provides a longer shaft engagement surface, reducing wobble and improving torque transfer compared to hubless gears — ideal for motor pinion applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🟡\u003c\/span\u003e\u003cstrong\u003eBrass Construction\u003c\/strong\u003e\u003cp\u003eBrass offers good machinability, low magnetic permeability, and moderate corrosion resistance — well-suited for indoor automation, robotics, and instrumentation drives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eModule 1 Precision Tooth Profile\u003c\/strong\u003e\u003cp\u003eMachined to Module 1 (1 mm\/tooth pitch) standards, ensuring smooth, low-backlash meshing with any standard M1 mating gear, rack, or pinion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eWide Tooth \u0026amp; Bore Selection\u003c\/strong\u003e\u003cp\u003eChoose from 15 to 50 teeth and bore diameters of 4–12 mm to match your exact motor shaft and gear ratio requirements without additional machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eBalanced Weight-to-Strength Ratio\u003c\/strong\u003e\u003cp\u003eBrass density provides enough mass for stable inertia in low-speed drives while remaining lightweight enough for compact robotic joints and small actuators.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eVersatile Drive Compatibility\u003c\/strong\u003e\u003cp\u003eWorks with standard Module 1 gear trains, worm gear outputs, and rack-and-pinion systems — suitable for CNC, 3D printer extruder drives, and educational robotics kits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Brass Module 1 Spur Gear\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1 (1 mm pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count\u003c\/th\u003e\n\u003ctd\u003e15 \/ 16 \/ 18 \/ 20 \/ 22 \/ 24 \/ 25 \/ 28 \/ 30 \/ 40 \/ 50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e4 \/ 5 \/ 6 \/ 7 \/ 8 \/ 10 \/ 12 mm (0.16–0.47 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub\u003c\/th\u003e\n\u003ctd\u003eIntegrated (with hub)\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\u003ePitch Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options (= Module × Teeth)\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\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural brass (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003e1 pcs per order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I choose the right tooth count for my application?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe tooth count determines your gear ratio. Divide the driven gear teeth by the driving gear teeth to get the ratio. For a 2:1 reduction, pair a 30-tooth gear with a 15-tooth pinion. Select the tooth count that achieves your target RPM or torque output based on your motor specs.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat bore size should I order for my motor shaft?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft diameter with calipers. Available bores are 4, 5, 6, 7, 8, 10, and 12 mm. Choose the bore that matches your shaft exactly. If you need a keyway or set-screw hole, check whether the hub wall thickness at your chosen bore allows for it — contact us to confirm for smaller bores.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs brass strong enough for my drive application?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass module 1 spur gears are well-suited for light-to-medium duty drives — robotics, instrumentation, 3D printers, and small CNC axes. For heavy-load or high-shock applications, consider steel gears instead. Brass excels where low noise, machinability, and non-magnetic properties are priorities.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow corrosion-resistant is brass for outdoor or humid environments?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass has moderate natural corrosion resistance and performs well in indoor and mildly humid environments. For outdoor or marine exposure, consider applying a light grease or protective coating, or opt for stainless steel gears for extended outdoor service.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill this gear mesh with my existing Module 1 rack or gear?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — as long as your existing rack or mating gear is also Module 1 with a 20° pressure angle (the most common standard), these gears will mesh correctly. Always verify the module and pressure angle of your existing components before ordering.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I modify the bore size myself after purchase?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBrass is highly machinable, so the bore can be enlarged with a drill press or lathe if needed. However, enlarging beyond the hub wall limits will compromise structural integrity. We recommend ordering the closest available bore size to your shaft diameter to avoid unnecessary material removal.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between this gear and a hubless spur gear?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe integrated hub extends the shaft engagement length beyond the gear face width, providing better axial stability and torque transfer. Hubless gears rely solely on the face width for shaft contact, which can lead to wobble under load. Hub gears are preferred for motor pinion and direct-drive applications.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e\u003cp\u003e🛒 Select your \u003cstrong\u003etooth count and bore size\u003c\/strong\u003e above, then add to cart.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Module 1【15 Tooth】 \/ 4mm \/ 1 pcs","offer_id":52442934083858,"sku":"PENGJGJXCD3602x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 5mm \/ 1 pcs","offer_id":52442934116626,"sku":"PENGJGJXCD3603x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934149394,"sku":"PENGJGJXCD3604x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 7mm \/ 1 pcs","offer_id":52442934182162,"sku":"PENGJGJXCD3605x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442934214930,"sku":"PENGJGJXCD3606x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【16 Tooth】 \/ 5mm \/ 1 pcs","offer_id":52442934247698,"sku":"PENGJGJXCD3607x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【16 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934280466,"sku":"PENGJGJXCD3608x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【16 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442934313234,"sku":"PENGJGJXCD3609x1","price":9.45,"currency_code":"USD","in_stock":true},{"title":"Module 1【18 Tooth】 \/ 5mm \/ 1 pcs","offer_id":52442934346002,"sku":"PENGJGJXCD3610x1","price":10.59,"currency_code":"USD","in_stock":true},{"title":"Module 1【18 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934378770,"sku":"PENGJGJXCD3611x1","price":10.59,"currency_code":"USD","in_stock":true},{"title":"Module 1【18 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442934411538,"sku":"PENGJGJXCD3612x1","price":10.59,"currency_code":"USD","in_stock":true},{"title":"Module 1【18 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442934444306,"sku":"PENGJGJXCD3613x1","price":10.59,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 4mm \/ 1 pcs","offer_id":52442934477074,"sku":"PENGJGJXCD3614x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 5mm \/ 1 pcs","offer_id":52442934509842,"sku":"PENGJGJXCD3615x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934542610,"sku":"PENGJGJXCD3616x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 7mm \/ 1 pcs","offer_id":52442934575378,"sku":"PENGJGJXCD3617x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442934608146,"sku":"PENGJGJXCD3618x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442934640914,"sku":"PENGJGJXCD3619x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【20 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442934673682,"sku":"PENGJGJXCD3620x1","price":10.95,"currency_code":"USD","in_stock":true},{"title":"Module 1【22 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934706450,"sku":"PENGJGJXCD3621x1","price":11.55,"currency_code":"USD","in_stock":true},{"title":"Module 1【22 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442934739218,"sku":"PENGJGJXCD3622x1","price":11.55,"currency_code":"USD","in_stock":true},{"title":"Module 1【22 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442934771986,"sku":"PENGJGJXCD3623x1","price":11.55,"currency_code":"USD","in_stock":true},{"title":"Module 1【22 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442934804754,"sku":"PENGJGJXCD3624x1","price":11.55,"currency_code":"USD","in_stock":true},{"title":"Module 1【24 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934837522,"sku":"PENGJGJXCD3625x1","price":12.85,"currency_code":"USD","in_stock":true},{"title":"Module 1【24 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442934870290,"sku":"PENGJGJXCD3626x1","price":12.77,"currency_code":"USD","in_stock":true},{"title":"Module 1【24 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442934903058,"sku":"PENGJGJXCD3627x1","price":12.77,"currency_code":"USD","in_stock":true},{"title":"Module 1【24 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442934935826,"sku":"PENGJGJXCD3628x1","price":12.77,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442934968594,"sku":"PENGJGJXCD3629x1","price":13.31,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442935001362,"sku":"PENGJGJXCD3630x1","price":13.18,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442935034130,"sku":"PENGJGJXCD3631x1","price":13.12,"currency_code":"USD","in_stock":true},{"title":"Module 1【25 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442935066898,"sku":"PENGJGJXCD3632x1","price":13.04,"currency_code":"USD","in_stock":true},{"title":"Module 1【28 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442935099666,"sku":"PENGJGJXCD3633x1","price":14.54,"currency_code":"USD","in_stock":true},{"title":"Module 1【28 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442935132434,"sku":"PENGJGJXCD3634x1","price":14.4,"currency_code":"USD","in_stock":true},{"title":"Module 1【28 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442935165202,"sku":"PENGJGJXCD3635x1","price":14.35,"currency_code":"USD","in_stock":true},{"title":"Module 1【28 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442935197970,"sku":"PENGJGJXCD3636x1","price":14.21,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442935230738,"sku":"PENGJGJXCD3637x1","price":16.12,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442935263506,"sku":"PENGJGJXCD3638x1","price":16.03,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442935296274,"sku":"PENGJGJXCD3639x1","price":15.98,"currency_code":"USD","in_stock":true},{"title":"Module 1【30 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442935329042,"sku":"PENGJGJXCD3640x1","price":15.84,"currency_code":"USD","in_stock":true},{"title":"Module 1【40 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442935361810,"sku":"PENGJGJXCD3641x1","price":23.19,"currency_code":"USD","in_stock":true},{"title":"Module 1【40 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442935394578,"sku":"PENGJGJXCD3642x1","price":23.11,"currency_code":"USD","in_stock":true},{"title":"Module 1【40 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442935427346,"sku":"PENGJGJXCD3643x1","price":23.05,"currency_code":"USD","in_stock":true},{"title":"Module 1【40 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442935460114,"sku":"PENGJGJXCD3644x1","price":22.92,"currency_code":"USD","in_stock":true},{"title":"Module 1【50 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442935492882,"sku":"PENGJGJXCD3645x1","price":28.49,"currency_code":"USD","in_stock":true},{"title":"Module 1【50 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442935525650,"sku":"PENGJGJXCD3646x1","price":28.41,"currency_code":"USD","in_stock":true},{"title":"Module 1【50 Tooth】 \/ 10mm \/ 1 pcs","offer_id":52442935558418,"sku":"PENGJGJXCD3647x1","price":28.27,"currency_code":"USD","in_stock":true},{"title":"Module 1【50 Tooth】 \/ 12mm \/ 1 pcs","offer_id":52442935591186,"sku":"PENGJGJXCD3648x1","price":28.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture3of17_c5184f8b-06b4-4512-8d4b-0c76a32d4f16.jpg?v=1783936982","url":"https:\/\/homediyer.com\/products\/brass-spur-gear-module-1-hub-15-50-tooth-bore-4-12mm","provider":"HomeDIYer","version":"1.0","type":"link"}