1.5 2.5 Modul Steel Spur Gears Pinion Gear Thick 15-25mm 12-100 Teeth For 3D CNC

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1.5 2.5 Modul Steel Spur Gears Pinion Gear Thick 15-25mm 12-100 Teeth For 3D CNC

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Gear Modulus: 1.5 Modulus

Number of Gear Tooth: 12 Teeth

Amount: 1 PCS

Price:

$6.77 USD

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In stock (500 units), ready to be shipped

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Steel Spur Gears for CNC & 3D Printing — Precise Modulus, Wide Tooth Range

When your CNC router stalls mid-cut or your 3D printer extruder skips steps, the culprit is often a worn or undersized gear. Engineers, makers, and small-batch manufacturers who demand repeatable, low-backlash motion need a spur gear they can trust across hundreds of operating hours. These steel spur gears are engineered for exactly that workload.

Each gear is machined from carbon steel, available in 1.5 modulus and 2.5 modulus, with face widths of 15–25 mm (approximately 0.59–0.98 in) and tooth counts spanning 12 to 100 teeth. Outer diameters scale with tooth count and modulus — from roughly 19.5 mm (0.77 in) on the smallest 1.5M 12T gear up to approximately 255 mm (10.04 in) on the largest 2.5M 100T gear.

Typical use cases include CNC rack-and-pinion drive systems for router gantries, extruder and filament-drive assemblies in FDM 3D printers, and rotary indexing tables or robotic joint actuators where consistent tooth engagement is critical for positional accuracy.

⚙️ Compatibility: Designed for standard metric modulus gear systems. 1.5M gears mesh with other 1.5M spur, rack, or pinion components; 2.5M gears mesh with other 2.5M components. Confirm bore diameter and keyway requirements against your shaft spec before ordering.

✅ Key Features of These Steel Spur Gears

🔩Carbon Steel Construction
Machined from carbon steel for reliable strength under continuous rotational load in CNC and automation applications.

📐Dual Modulus Options
Available in 1.5M and 2.5M to match your existing gear train without custom adaptation.

🦷Wide Tooth Count Range
12 to 100 teeth in a single product line — cover small pinion drives and large reduction stages from one source.

📏15–25 mm Face Width
Generous face width distributes load across the tooth surface, reducing wear and extending service life in high-cycle applications.

🎯Consistent Tooth Profile
Standard involute tooth form ensures smooth meshing and predictable backlash when paired with matching modulus components.

🏭CNC & 3D Printer Ready
Sized and toleranced for direct use in rack-and-pinion CNC gantries, extruder drives, and robotic actuator stages.

📐 Technical Specifications — Steel Spur Gears

Material	Carbon Steel
Gear Type	Spur Gear (Involute Tooth Profile)
Available Modulus	1.5M / 2.5M
Tooth Count Range	12 – 100 Teeth
Face Width (Thickness)	15 – 25 mm (0.59 – 0.98 in)
Outer Diameter Range	See variant options
Bore Diameter	See variant options
Surface Finish	See variant options
Pressure Angle	20°
Package Quantity	1 PCS
Compatible Applications	CNC Routers, 3D Printers, Robotics, Automation

❓ Frequently Asked Questions

How do I choose between 1.5 modulus and 2.5 modulus?

Modulus determines the size of each tooth. A 1.5M gear has smaller, finer teeth suited to lighter loads and compact drives — common in 3D printer extruders and small CNC axes. A 2.5M gear has larger, stronger teeth that handle higher torque, making it the right choice for heavier CNC gantries or robotic joints. Both gears must mesh with components of the same modulus.

What tooth count should I select for my application?

Tooth count determines your gear ratio when paired with a pinion or rack. A smaller tooth count (12–20T) on the drive gear creates a speed reduction when meshed with a larger gear, increasing torque. Larger tooth counts (60–100T) are used as driven gears in reduction stages or as large-diameter drive wheels in rack-and-pinion systems. Match the tooth count to your required ratio and available shaft center distance.

Are these gears strong enough for CNC router gantry drives?

Carbon steel spur gears in 2.5M with 20–40 teeth are commonly used in light-to-medium CNC rack-and-pinion gantry systems. The 15–25 mm face width provides adequate load distribution for typical hobby and small-production CNC routers. For heavy industrial cutting loads, confirm the specific tooth root bending strength against your calculated tangential force before installation.

Do these gears resist corrosion?

Carbon steel has moderate corrosion resistance. In dry indoor environments — typical for CNC workshops and 3D printing setups — the gears perform reliably without additional treatment. For humid or outdoor environments, applying a light machine oil or grease to the tooth surfaces is recommended to prevent surface oxidation and maintain smooth meshing.

Will a 1.5M gear mesh directly with a 2.5M gear?

No. Gears of different modulus values are not interchangeable and will not mesh correctly. Always pair 1.5M gears with other 1.5M components (gears, racks, pinions) and 2.5M gears with other 2.5M components. Mixing modulus values causes incorrect tooth engagement, accelerated wear, and potential drive failure.

How do I confirm the bore diameter fits my shaft?

Bore diameter varies by tooth count and modulus. Please refer to the variant detail or contact us to confirm the bore size for your selected tooth count before ordering. If a custom bore or keyway is required, note this in your order inquiry so we can advise on available options.

Can I use these gears in a 3D printer extruder drive?

Yes. The 1.5M variants with 12–20 teeth are well-suited to compact extruder gear drives where a small pinion meshes with a larger driven gear to increase torque on the filament feed roller. Verify the bore diameter matches your motor shaft and that the face width clears your extruder housing before assembly.

🛒 Select your Gear Modulus and Number of Gear Tooth above, then add to cart.