{"product_id":"spur-gear-stainless-steel-module-1-hub-15-40-tooth-motor-pinion","title":"Spur Gear Stainless Steel Module 1 with Hub 15 - 40 Tooth Motor Pinion Precision","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eModule 1 Stainless Steel Spur Gear with Hub — Precision Motor Pinion for CNC \u0026amp; Automation\u003c\/h2\u003e\n\u003cp\u003eWhen a slipping or undersized pinion gear causes positioning errors in your CNC router, 3D printer, or robotic arm, the entire build suffers. Engineers and makers who demand repeatable, backlash-minimized motion need a spur gear that holds tight tolerances across thousands of cycles. These Module 1 stainless steel spur gears with integrated hub are machined for exactly that workload.\u003c\/p\u003e\n\u003cp\u003eEach gear is machined from stainless steel, offering corrosion resistance and structural rigidity in a compact form factor. The integrated hub provides a secure shaft-clamping surface. Tooth counts range from 15 to 40 teeth (Module 1), with outer diameters scaling accordingly — approximately 17 mm (0.67 in) for 15T up to approximately 42 mm (1.65 in) for 40T. Bore options span 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, and 16 mm to match common motor and shaft standards.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include motor pinion drives on desktop CNC machines, stepper-motor geartrains in robotic joints, and precision indexing mechanisms in automated assembly fixtures — all applications where a reliable module 1 spur gear with hub is the critical link between motor torque and linear or rotary output.\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 Module 1 (1 mm\/tooth) gear systems. Pairs with Module 1 racks, idler gears, and timing components. Verify bore size matches your motor or drive shaft diameter before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Module 1 Stainless Steel Spur Gears\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\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 wider clamping surface for set screws or keyways, reducing shaft slip under load compared to hubless gears.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e\u003cstrong\u003eStainless Steel Construction\u003c\/strong\u003e\u003cp\u003eMachined from stainless steel for corrosion resistance and durability in humid, oily, or outdoor-adjacent environments where carbon steel would oxidize.\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\u003eStandard Module 1 involute tooth geometry ensures smooth meshing, predictable gear ratios, and interchangeability with any other Module 1 component in your drivetrain.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eWide Tooth Count Selection (15–40T)\u003c\/strong\u003e\u003cp\u003eTwelve tooth-count options from 15 to 40 teeth let you dial in the exact gear ratio needed for your motor pinion or reduction stage without custom machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eMultiple Bore Sizes (5–16 mm)\u003c\/strong\u003e\u003cp\u003eEight bore options — 5, 6, 8, 10, 12, 14, 15, and 16 mm — cover the most common stepper motor shaft and servo output shaft diameters used in CNC and robotics builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚡\u003c\/span\u003e\u003cstrong\u003eLow-Backlash Mesh Performance\u003c\/strong\u003e\u003cp\u003ePrecision-machined tooth flanks and consistent pitch diameter minimize backlash, which is critical for positioning accuracy in CNC routers, laser cutters, and pick-and-place machines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Module 1 Stainless Steel Spur Gear\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModule\u003c\/th\u003e\n\u003ctd\u003e1 (1 mm per tooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Count Options\u003c\/th\u003e\n\u003ctd\u003e15, 16, 18, 20, 22, 24, 25, 28, 30, 32, 35, 40 Teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Size Options\u003c\/th\u003e\n\u003ctd\u003e5 mm \/ 6 mm \/ 8 mm \/ 10 mm \/ 12 mm \/ 14 mm \/ 15 mm \/ 16 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (approx.)\u003c\/th\u003e\n\u003ctd\u003eSee variant options (scales with tooth count: ~17 mm for 15T to ~42 mm for 40T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub\u003c\/th\u003e\n\u003ctd\u003eIntegrated (extended hub with set-screw bore)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTooth Profile\u003c\/th\u003e\n\u003ctd\u003eInvolute, Module 1\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\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural stainless (uncoated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pc\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\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\u003eSelect the tooth count based on your required gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For a motor pinion, a smaller tooth count (15–20T) gives higher torque reduction, while a larger count (30–40T) reduces speed less aggressively. Match the module (Module 1) on both meshing gears.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhich bore size should I choose for my stepper motor shaft?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure your motor shaft diameter with calipers before ordering. Common NEMA 17 stepper motors use a 5 mm shaft; NEMA 23 motors typically use an 8 mm shaft; larger servo motors may use 10–16 mm shafts. Choose the bore that matches your shaft exactly — a loose bore will cause runout and positioning errors.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these gears strong enough for CNC router or laser cutter use?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Stainless steel provides significantly higher tensile and shear strength than plastic or aluminum gears, making these suitable for continuous-duty CNC, laser cutter, and robotic applications. For very high-torque or high-speed industrial drives, verify the specific load rating against your application's peak torque requirements.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill these gears corrode in humid or outdoor environments?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStainless steel offers good corrosion resistance in humid, lightly wet, and outdoor-adjacent conditions. For direct water immersion or highly corrosive chemical environments, consider adding a light lubricant or grease to the tooth mesh to extend service life.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these compatible with Module 1 racks and other Module 1 gears?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. All Module 1 gears share the same tooth pitch (1 mm per tooth), so these spur gears mesh correctly with any other Module 1 component — racks, idler gears, or compound gear stages — regardless of brand, as long as the pressure angle is also 20°.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between a hubbed and a hubless spur gear?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA hubbed gear has an extended cylindrical boss (hub) protruding from the gear face, which provides more material for a set screw or keyway to grip the shaft. This reduces the risk of the gear spinning on the shaft under load. Hubless gears are thinner and lighter but rely solely on the gear body thickness for shaft retention, which can be insufficient for high-torque motor pinion applications.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use a set screw to secure the gear to the shaft?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The integrated hub is designed to accommodate a radial set screw. For best results, use a flat-ground section on your shaft (a flat spot) aligned with the set screw to prevent rotation. Apply thread-locking compound to the set screw for vibration-prone environments.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your tooth count and bore size above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I choose the right tooth count for my application?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Select the tooth count based on your required gear ratio. Divide the driven gear's tooth count by the driving gear's tooth count to get the ratio. For a motor pinion, a smaller tooth count (15–20T) gives higher torque reduction, while a larger count (30–40T) reduces speed less aggressively. Match the module (Module 1) on both meshing gears.\"}},{\"@type\":\"Question\",\"name\":\"Which bore size should I choose for my stepper motor shaft?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Measure your motor shaft diameter with calipers before ordering. Common NEMA 17 stepper motors use a 5 mm shaft; NEMA 23 motors typically use an 8 mm shaft; larger servo motors may use 10–16 mm shafts. Choose the bore that matches your shaft exactly.\"}},{\"@type\":\"Question\",\"name\":\"Are these gears strong enough for CNC router or laser cutter use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Stainless steel provides significantly higher tensile and shear strength than plastic or aluminum gears, making these suitable for continuous-duty CNC, laser cutter, and robotic applications.\"}},{\"@type\":\"Question\",\"name\":\"Will these gears corrode in humid or outdoor environments?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Stainless steel offers good corrosion resistance in humid, lightly wet, and outdoor-adjacent conditions. For direct water immersion or highly corrosive chemical environments, consider adding a light lubricant or grease to the tooth mesh.\"}},{\"@type\":\"Question\",\"name\":\"Are these compatible with Module 1 racks and other Module 1 gears?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. All Module 1 gears share the same tooth pitch (1 mm per tooth), so these spur gears mesh correctly with any other Module 1 component — racks, idler gears, or compound gear stages — as long as the pressure angle is also 20°.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between a hubbed and a hubless spur gear?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A hubbed gear has an extended cylindrical boss (hub) protruding from the gear face, providing more material for a set screw or keyway to grip the shaft. This reduces the risk of the gear spinning on the shaft under load.\"}},{\"@type\":\"Question\",\"name\":\"Can I use a set screw to secure the gear to the shaft?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The integrated hub is designed to accommodate a radial set screw. For best results, use a flat-ground section on your shaft aligned with the set screw and apply thread-locking compound for vibration-prone environments.\"}}]}\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Module 1【15 Tooth】 \/ 5mm \/ 1 pcs","offer_id":52442721812754,"sku":"PENGJGJXCD3691x1","price":16.25,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442721845522,"sku":"PENGJGJXCD3692x1","price":16.25,"currency_code":"USD","in_stock":true},{"title":"Module 1【15 Tooth】 \/ 8mm \/ 1 pcs","offer_id":52442721878290,"sku":"PENGJGJXCD3693x1","price":16.25,"currency_code":"USD","in_stock":true},{"title":"Module 1【16 Tooth】 \/ 5mm \/ 1 pcs","offer_id":52442721911058,"sku":"PENGJGJXCD3694x1","price":16.25,"currency_code":"USD","in_stock":true},{"title":"Module 1【16 Tooth】 \/ 6mm \/ 1 pcs","offer_id":52442721943826,"sku":"PENGJGJXCD3695x1","price":16.25,"currency_code":"USD","in_stock":true},{"title":"Module 1【16 Tooth】 \/ 8mm \/ 1 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