Mellow GT2 Timing Pulley 20T 8mm Bore 6mm Belt – 2GT Sync
Mellow GT2 Timing Pulley 20T 8mm Bore 6mm Belt – 2GT Sync
Mellow GT2 Timing Pulley – 20 Teeth, 8mm Bore, 6mm Belt Width
Keep your 3D printer and CNC machinery running with precision using the Mellow GT2 Synchronous Timing Pulley. Engineered from high-grade aluminum alloy, this 20-tooth GT2 pulley delivers smooth, accurate belt-drive performance — making it an essential upgrade or replacement component for any motion system that demands reliable, low-backlash transmission.
Key Features
- 20 Teeth (20T) – Optimized tooth profile for GT2 synchronous belts
- 8mm Inner Bore – Fits standard stepper motor shafts used in 3D printers and CNC routers
- 6mm Belt Width – Compatible with standard 2GT/GT2 timing belts
- Aluminum Alloy Construction – Lightweight yet durable for high-cycle mechanical applications
- 2× M4 Set Screw Keyholes – Secure, tool-free shaft locking for stable, vibration-resistant operation
- Total Height: 16mm – Compact profile fits tight drive assemblies
- No Assembly Required – Ready to install straight out of the box
- Versatile Use – Suitable for 3D printers, CNC lathes, milling machines, gear shapers, drilling machines, hobbing machines, and other machinery transmission applications
Specifications
| Brand | Mellow |
| Model | 20TP6SB8 |
| Material | Aluminum Alloy |
| Tooth Quantity | 20T |
| Inner Bore | 8mm |
| Belt Width | 6mm |
| Total Height | 16mm |
| Set Screws | 2× M4 |
| Country of Origin | Made in Mainland China |
Package Contents
- GT2 Timing Pulley × (quantity selected at purchase)
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Frequently Asked Questions
Q: Is this GT2 timing pulley compatible with standard 3D printer stepper motors?
A: Yes. The Mellow GT2 Timing Pulley features an 8mm inner bore, which matches the shaft diameter of most standard NEMA 17 stepper motors commonly used in 3D printers such as Creality, Prusa, Voron, and similar platforms. The 2× M4 set screws ensure a firm, slip-free fit on the motor shaft.
Q: What belt type is this pulley designed for?
A: This pulley is specifically designed for GT2 (2GT) synchronous timing belts with a 6mm width and a 2mm pitch. It will not be compatible with HTD, T5, or other belt profiles. Always verify your belt type before ordering.
Q: Can this pulley be used in applications beyond 3D printing?
A: Absolutely. While it is widely used in 3D printers, the Mellow GT2 20T pulley is also well-suited for CNC routers, lathes, milling machines, gear shapers, hobbing machines, and other mechanical transmission systems that use GT2 belt-drive setups.
Q: Does the pulley arrive ready to install?
A: Yes — no assembly is required. The pulley comes pre-finished and includes the M4 set screws pre-installed in the keyhole sockets, so you can mount it directly onto your motor shaft right away.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.