4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC
4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC
4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC
4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC
4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC
4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC
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4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC

4 Modul Steel Spur Gears Pinion Gear Thick 35mm 10-55 Teeth For 3D CNC

HomeDIYer
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By HomeDIYer®

Price:
$29.06 USD
Stock:
In stock (500 units), ready to be shipped

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Description

4 Mod Steel Spur Gears — Precision Pinion Gears for 3D Printers, CNC & DIY Motion Systems

When a stripped or undersized gear brings your CNC router, 3D printer, or custom drive system to a halt, you need a replacement that fits precisely and holds up under load. These 4 Mod steel spur gears are engineered for makers, machine builders, and workshop professionals who demand reliable power transmission without constant maintenance or replacement cycles.

Each gear is machined from carbon steel with a module (Mod) of 4, a face width (thickness) of 35mm (~1.38 in), and a bore sized to accept a standard shaft. Tooth counts range from 10 to 35 teeth across variants, giving pitch circle diameters from approximately 40mm (~1.57 in) for 10T up to 140mm (~5.51 in) for 35T. The tooth profile follows the standard 20° pressure angle involute form for smooth, low-noise meshing.

Typical applications include CNC rack-and-pinion drive axes, 3D printer extruder and Z-axis assemblies, robotic joint actuators, and custom gearbox builds where a 4 Mod pinion gear with consistent tooth geometry is required for long-term accuracy.

⚙️ Compatibility: Meshes with any standard 4 Mod (Module 4) spur gear or rack. Verify bore diameter and keyway requirements against your shaft before ordering.

✅ Key Features of These 4 Mod Steel Spur Gears

  • 🔩 Carbon Steel Construction — Machined from solid carbon steel for strength and wear resistance in continuous-duty drive applications.
  • 📐 Module 4 Standard Tooth Profile — 20° pressure angle involute teeth mesh cleanly with any standard 4 Mod mating gear or rack, ensuring predictable gear ratios.
  • 📏 35mm Face Width — The 35mm (~1.38 in) tooth face provides a wide contact area that distributes load evenly and reduces tooth stress under torque.
  • 🎯 Wide Tooth Count Selection (10–35 Teeth) — Choose the exact tooth count to achieve your target gear ratio without custom machining or compromise.
  • 🔄 Consistent Bore for Shaft Mounting — Each gear features a machined center bore suitable for standard shaft diameters; confirm bore size against your variant before ordering.
  • 🏭 Suitable for CNC, 3D Printing & Robotics — Designed for precision motion control environments including CNC routers, 3D printer drive trains, and robotic actuator assemblies.

📐 Technical Specifications — 4 Mod Steel Spur Gears

Module (Mod) 4
Pressure Angle 20°
Face Width (Thickness) 35mm (~1.38 in)
Tooth Count Range 10 – 35 Teeth (see variant options)
Pitch Circle Diameter See variant options (Mod × Teeth)
Material Carbon Steel
Bore Diameter See variant options
Keyway See variant options
Surface Finish See variant options
Tooth Profile Involute
Application CNC, 3D Printer, Robotics, Custom Gearbox
Weight See variant options

❓ Frequently Asked Questions

How do I choose the right tooth count for my application?

Your gear ratio is determined by dividing the tooth count of the driven gear by the tooth count of the driving (pinion) gear. For example, pairing a 10-tooth pinion with a 30-tooth gear gives a 3:1 reduction. Select the tooth count that achieves your target ratio while keeping the pitch circle diameter within your available space. The pitch circle diameter equals Module × Tooth Count, so a 4 Mod 15-tooth gear has a 60mm pitch circle diameter.

What module do these gears use, and will they mesh with my existing gears?

These gears are Module 4 (Mod 4). They will mesh correctly with any other standard Mod 4 spur gear or Mod 4 rack, regardless of brand, as long as the pressure angle is also 20°. Module is not interchangeable — a Mod 4 gear will not mesh properly with a Mod 3 or Mod 5 gear.

What material are these spur gears made from, and how strong are they?

These gears are machined from carbon steel, which offers a good balance of tensile strength, machinability, and wear resistance for general-purpose power transmission. Carbon steel spur gears are suitable for moderate-to-high torque applications in CNC machines, 3D printers, and robotic systems. For very high-speed or corrosive environments, consider whether a surface treatment or alternative material is needed for your specific use case.

Are these gears corrosion-resistant? Can I use them outdoors or in humid environments?

Carbon steel is not inherently corrosion-resistant. For outdoor, humid, or wet environments, we recommend applying a rust-inhibiting lubricant or grease to the gear teeth and bore, or considering a stainless steel or coated alternative. For indoor CNC and 3D printer use in normal workshop conditions, standard lubrication maintenance is sufficient.

What bore diameter does the gear have? Will it fit my shaft?

Bore diameter varies by variant and tooth count. Please check the specific variant listing or contact us to confirm the bore size before ordering. If your shaft requires a keyway or set-screw hole, verify this is included in the variant you select. Custom bore machining may be required for non-standard shaft sizes.

Can I use these gears in a 3D printer extruder or Z-axis drive?

Yes. These 4 Mod steel spur gears are well-suited for 3D printer drive systems, including Z-axis lead screw drives and extruder gear trains, where a Mod 4 pinion is specified. The 35mm face width provides ample contact area for the torque levels typical in desktop and industrial 3D printers. Confirm the tooth count and bore diameter match your printer's drive specification before ordering.

How do I calculate the center distance between two meshing gears?

Center distance = (Pitch Circle Diameter of Gear 1 + Pitch Circle Diameter of Gear 2) ÷ 2. Since PCD = Module × Teeth, for a 4 Mod 15T pinion meshing with a 4 Mod 30T gear: PCD1 = 60mm, PCD2 = 120mm, center distance = (60 + 120) ÷ 2 = 90mm. Use this formula to set your shaft spacing accurately in your design.

🛒 Select your tooth count (Model) above, then add to cart.

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