40 Tooth Spur Gear – 42mm OD – PETG 3D Printed Gear w/ 14mm Bore & Keyway (Module 1, 20° PA)

Precision 3D Printed #40 Spur Gear (Module 1)

This 40-tooth spur gear is precision 3D printed in durable PETG, offering a balance of strength, flexibility, and heat resistance. Designed for mechanical systems, robotics, and custom builds, this gear features a 14mm bore with integrated keyway for reliable torque transfer.

With a compact 42mm outer diameter, it’s ideal for tighter assemblies while maintaining smooth, consistent gear engagement.

Key Features

• 40 tooth precision spur gear
• Durable PETG construction (stronger than PLA)
• 14mm bore with keyway for secure shaft fit
• Optimized 20° pressure angle
• Smooth engagement with consistent tooth geometry
• High-resolution 3D printed finish

Specifications

Applications

Perfect for:

• Robotics & automation
• DIY gearboxes
• Mechanical prototypes
• Replacement gears
• RC projects
• Engineering builds

Material Details (PETG)

PETG offers:

• Higher strength than PLA
• Better impact resistance
• Improved temperature resistance
• Slight flexibility (reduces cracking)

Manufacturing Details

Each gear is printed using tuned settings for strength and precision:

• Reinforced walls for durability
• Optimized infill for load handling
• Clean top layer finish with visible print lines
• Dimensional accuracy checked before shipment

 Important Notes

• Visible layer lines are normal (3D printed part)
• Designed for light to moderate load applications
• Not intended for high-speed or heavy industrial use

Custom Options Available

Need a different configuration?

We can customize:

• Tooth count
• Bore size
• Keyway dimensions
• Gear thickness
• Materials

Message us for custom orders.