GT2 Smooth Idler Pulley for 3D Printer with 5mm Shaft

The GT2 Smooth Idler Pulley for 3D Printer with 5mm Shaft is one of the essential components in the design of precise motion systems such as 3D printers. With its smooth, toothless GT2 design and standard construction, this GT2 Smooth Pulley ensures quiet and stable belt guidance while minimizing vibration during movement. Made from high-quality aluminum, it combines low weight with excellent durability and resistance to wear. The pulley features an outer diameter of 18 mm and a 12 mm belt groove diameter, making it perfectly compatible with any 5mm Shaft Pulley for 3D Printer setup.

In power transmission systems, idler pulleys are widely used to redirect timing belts, increase belt contact area, and maintain proper tension. This results in smoother power transfer, improved stability, and greater positioning accuracy across the printer’s axes. The GT2 Smooth Idler Pulley functions as a guiding pulley placed behind the timing belt, increasing belt contact with the drive pulley without adding extra load or disrupting movement. In stepper-motor-based systems, this design also helps reduce discrete motion steps, leading to higher precision and improved print quality.

As part of a collection of Cheap 3D Printer Parts, this pulley offers reliable performance at an affordable price—an excellent choice for enthusiasts building or upgrading 3D printers, CNC machines, or other belt-driven systems. Its easy installation, compatibility with standard timing belts, and vibration-free operation make it a standout component in any precision motion setup.

Applications of the GT2 Smooth Pulley

1. Used in 3D printers for precise belt guidance and improved printing accuracy
2. Applied in small CNC machines for smooth and consistent motion transmission
3. Utilized in educational and industrial robots to control rotational axis movement
4. Ideal for DIY mechanical projects based on stepper motors and timing belt systems

Specifications of the 5mm Shaft Idler Pulley

1. Model: GT2-20 (Smooth / Toothless)
2. Material: Aluminum Alloy
3. Number of Teeth: None (Smooth Surface)
4. Shaft Diameter (Bore): 5 mm
5. Outer Diameter: 18 mm
6. Belt Groove Diameter: 12 mm
7. Belt Width Compatibility: 6 mm (up to 7 mm max)
8. Overall Height: 9 mm
9. Bearing Type: Equipped with dual internal bearings for smooth rotation