Smooth pulley wheel 20T for GT2 belt 6 mm — bore 5 mm, OEM

Smooth pulley wheel 20T for GT2 belt 6 mm — bore 5 mm, OEM is a compact drive pulley engineered for use with GT2 timing belts 6 mm wide. Its 20-tooth profile provides consistent belt engagement for positional accuracy and reduced backlash. The 5 mm bore allows direct mounting on common motor shafts or axles, making the pulley suitable for motion systems in 3D printers, CNC machines and other belt-driven mechanisms where precise linear or rotational movement is required.

Advantages

The pulley delivers reliable and repeatable belt engagement thanks to its 20-tooth GT2 profile, which minimizes slipping and stretch-related errors. A smooth, evenly machined profile reduces wear on the belt while promoting low-friction operation. Its compact size and standardized 5 mm bore support straightforward installation on many hobbyist and professional motion systems. The OEM construction ensures consistent dimensions and compatibility with GT2 belts 6 mm wide.

Suitable for

• 3D printer X/Y/Z belt drives and extruder positioning
• CNC machines with belt-driven axes or conveyors
• Robotics and automation requiring precise timing belt transmission
• Retrofit and repair of hobbyist or light industrial belt systems

Key specifications

• Tooth count: 20 (GT2 profile)
• Belt compatibility: GT2 timing belts, 6 mm width
• Bore diameter: 5 mm (for direct shaft mounting)
• Material: OEM metal construction with machined profile (metal type varies by manufacturer)
• Application: compact drive pulley for positioning and belt transmission

How to use

Mount the pulley onto a compatible 5 mm shaft ensuring a secure fit; use a set screw, clamp collar or appropriate fastening method depending on your shaft and pulley design. Align the pulley with the mating pulley(s) so the GT2 belt runs true and parallel to the axis of motion. Install a compatible GT2 belt (6 mm wide) and tension it according to your system requirements to avoid excessive slack or overtightening, which can cause wear or bearing strain. Verify smooth rotation and correct engagement under low-speed manual rotation before powering the driven system.

Usage recommendations

For longest service life, periodically inspect the pulley and belt for signs of wear, contamination or misalignment. Maintain proper belt tension and replace the belt if tooth deformation or fraying appears. When used in high-load or high-speed applications, confirm that shaft fixation and bearing support are adequate to prevent slippage or premature wear.