1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm
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1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm

1 Modulus 15 Teeth Spur Gears Transmission Motor Gear Bore 4mm-8mm Pitch 3.14mm

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Price:
$13.23 USD
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In stock (500 units), ready to be shipped

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Description

1 Mod 15 Teeth Spur Gears — Reliable Transmission for DIY Motors & Automation Projects

When your motor shaft slips, your gear ratio drifts, or your existing plastic gears strip under load, you need a drop-in replacement that holds its geometry under real working conditions. Makers, robotics builders, CNC hobbyists, and small-machine engineers rely on these 1 Modulus 15 Teeth Spur Gears to deliver consistent torque transfer across a wide range of bore sizes and material grades.

Each spur gear is machined to a 1 Mod (Module 1) standard with 15 teeth and a pitch of 3.14mm (≈ 0.124 in). Bore options span 4mm through 8mm (plus keyed variants up to 8×7.5mm), covering the most common motor shaft diameters used in DIY automation. Available in three materials — engineering-grade Nylon, 304 Stainless Steel, and medium-carbon 45# Steel — so you can match the gear to your load, environment, and budget.

Typical use cases include small DC and stepper motor drives in 3D printer extruder assemblies, tabletop CNC router axis drives, robotic arm joint mechanisms, conveyor prototype builds, and educational mechatronics kits where a 1 mod 15 tooth spur gear with a 4mm–8mm bore is the standard interchange component.

⚙️ Compatibility: Meshes with any Module 1 (Mod 1) spur or helical gear. Verify your mating gear's module before ordering. Bore must match your motor shaft diameter — see variant options for available sizes.

✅ Key Features of These 1 Mod 15 Teeth Spur Gears

  • 📐Module 1 Standard, 15 Teeth — 3.14mm pitch circle pitch ensures direct mesh compatibility with the entire Module 1 gear family used across DIY robotics and automation platforms.
  • 🔩Three Material Grades — Nylon for lightweight, low-noise, self-lubricating applications; 304 Stainless Steel for corrosion-resistant environments; 45# Steel for higher-torque mechanical drives requiring solid metal construction.
  • 🎯Wide Bore Range — Round bores from 4mm to 8mm plus D-bore / keyed variants (5×4.5mm, 6×5mm, 6×5.5mm, 8×7mm, 8×7.5mm) accommodate the most common motor shaft profiles without custom machining.
  • ⚡Consistent Tooth Geometry — Machined tooth profile maintains accurate involute form for smooth, low-vibration power transmission even at higher RPM ranges typical of small DC motors.
  • 🔄Direct Drop-In Replacement — Standard Mod 1 dimensions mean these gears interchange with OEM and aftermarket components in 3D printers, CNC machines, and robotic kits without modification.
  • 🛡️Material-Matched Durability — Stainless Steel variants resist moisture and mild chemicals; 45# Steel variants handle sustained mechanical load; Nylon variants reduce system noise and eliminate the need for external lubrication in light-duty cycles.

📐 Technical Specifications — Module 1 Spur Gears

Module (Mod) 1
Number of Teeth 15
Pitch (Circular Pitch) 3.14mm (≈ 0.124 in)
Pressure Angle 20° (standard involute)
Pitch Circle Diameter 15mm (≈ 0.591 in)
Outside Diameter (approx.) 17mm (≈ 0.669 in)
Bore Options 4mm, 5mm, 6mm, 6.35mm, 7mm, 8mm (round); 5×4.5mm, 6×5mm, 6×5.5mm, 8×7mm, 8×7.5mm (keyed/D-bore)
Material Options Nylon / 304 Stainless Steel / 45# Steel
Hub Width (approx.) See variant options
Face Width (approx.) See variant options
Finish Natural (Nylon) / Polished (Stainless Steel) / Black oxide or natural (45# Steel)
Gear Type External Spur Gear
Quantity per Order 1 piece

❓ Frequently Asked Questions

How do I know which bore size to choose?

Measure your motor shaft diameter with a caliper. Round bores (4mm–8mm) suit standard round shafts. If your shaft has a flat (D-shaft) or keyway, select the matching keyed bore variant such as 6×5mm or 8×7mm — the first number is the bore diameter and the second is the flat-to-bore dimension.

Will this gear mesh with my existing Module 1 gears?

Yes. Any two Module 1 external spur gears with a 20° pressure angle will mesh correctly regardless of tooth count. Confirm your mating gear is marked "M1" or "Mod 1" before ordering. Gears of different modules (e.g., Mod 0.8 or Mod 1.5) are not interchangeable.

Which material should I choose for my application?

Choose Nylon for lightweight, quiet, low-torque applications (e.g., small robots, educational kits) where self-lubrication is an advantage. Choose Stainless Steel when the gear will be exposed to moisture, humidity, or mild chemicals. Choose 45# Steel for higher-torque mechanical drives where metal-to-metal strength is required and the environment is dry.

How strong are these gears under continuous load?

Load capacity depends on material and operating speed. 45# Steel offers the highest tensile strength for sustained mechanical loads. Stainless Steel provides good strength with corrosion resistance. Nylon is suited for light-duty, intermittent-load applications. For precise torque ratings, refer to your system's gear stress calculations using the gear's pitch circle diameter and face width.

Are these gears corrosion-resistant?

The 304 Stainless Steel variants offer solid corrosion resistance suitable for humid environments, light washdown, and outdoor enclosures. Nylon is inherently non-corrosive. The 45# Steel variants are not corrosion-resistant and should be used in dry, protected environments or treated with a suitable coating if moisture exposure is expected.

Can I use these gears in a 3D printer or CNC machine?

Yes. Module 1, 15-tooth spur gears are a common interchange component in many open-source 3D printer extruder drives and small CNC axis assemblies. Verify the bore matches your motor shaft and that the gear's outside diameter clears your housing before installing.

How many gears are included per order?

Each order includes 1 piece. If you need multiple gears for a gear train or redundancy stock, simply increase the quantity at checkout.

🛒 Select your Model, Bore, and Material above, then add to cart.

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