Involute spur gear Module 1.5 (Involute gear)

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Technical Description for MakerWorld – Involute Spur Gear M1.5, 20 Teeth, Ø4 mm Bore

This precisely manufactured involute spur gear is optimized for 3D printing and is ideal for mechanical applications with parallel shafts

⚙️ Technical Features

• Tooth Profile: Involute gearing according to DIN 867 – for uniform power transmission and good self-centering
• Module: 1.5 mm – defines the tooth geometry and results in a pitch circle diameter of 30 mm
• Number of Teeth: 20 – compact design with balanced gear ratio
• Pressure Angle: 20° – standard value for efficient meshing and low noise
• Bore: Ø4 mm centered – suitable for shafts or axles with 4 mm diameter
• Hub: optionally reinforced for higher torques or with keyway
• Material Recommendation: PETG, ASA or PA-CF – for high strength and good sliding properties
• Print Orientation: lying flat with tooth flanks facing upwards – minimizes support structures and improves dimensional accuracy

🛠️ Application

Suitable for model making, robotics, transmissions or DIY drives. The involute shape allows for reliable power transmission even with slight tolerances

📌 Design Notes

• Consider tooth height, tip clearance, and root fillet according to standard
• If necessary, rework the bore for a play-free fit
• For high loads, a metal bushing or reinforced hub is recommended

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