Mellow GT2 Timing Belt Pulley 20T 5mm Bore | 3D Printer
Mellow GT2 Timing Belt Pulley 20T 5mm Bore | 3D Printer
Mellow GT2 Open Timing Belt Pulley – 20 Teeth, 5mm Bore
Upgrade your 3D printer's motion system with the Mellow GT2 Aluminum Timing Belt Pulley. Machined to a precision surface finish of Ra0.4µm, this 20-tooth synchronous wheel is designed to work seamlessly with GT2 / 2GT belts in widths of 6mm, 9mm, 10mm, and 12mm. Whether you're building or fine-tuning a CoreXY, Cartesian, or Delta printer, this pulley delivers consistent, skip-free motion for sharper, more accurate prints.
Made in Mainland China.
Why Choose the Mellow GT2 Pulley?
Standard timing pulleys are often manufactured with loose tolerances, which can cause belt skipping and reduce print accuracy. Mellow produces this pulley using specialist Gates-compatible tooling, ensuring the tooth profile matches your GT2 belt precisely — eliminating skip and backlash that compromise print quality.
- High-Precision Machining: Ra0.4µm surface finish for ultra-smooth belt engagement
- Aluminum Alloy Construction: Lightweight yet durable — resists wear over long print runs
- Versatile Belt Compatibility: Fits 6mm, 9mm, 10mm, and 12mm wide GT2 / 2GT synchronous belts
- 20 Teeth, 2mm Pitch: Standard GT2 geometry for consistent linear motion
- 5mm Inner Bore: Direct fit for most NEMA 17 stepper motor shafts
- Secure Mounting: Two M4 set screws for reliable shaft lock-down
- Silver Finish: Clean, professional look inside your printer
Specifications
| Teeth Number | 20T |
| Pitch | 2mm (GT2 / 2GT) |
| Inner Bore | 5mm |
| Compatible Belt Widths | 6mm / 9mm / 10mm / 12mm |
| Material | Aluminum Alloy |
| Set Screws | 2 × M4 |
| Color | Silver |
| Assembly Required | Yes |
Package Contents
- 1 × GT2 20-Tooth Synchronous Timing Belt Pulley
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Frequently Asked Questions
Q: Is this GT2 timing belt pulley compatible with standard NEMA 17 stepper motors?
A: Yes. The Mellow GT2 pulley features a 5mm inner bore, which is the standard shaft diameter for NEMA 17 stepper motors used in most FDM 3D printers. Two M4 set screws ensure a secure, wobble-free fit on the motor shaft.
Q: Which belt widths does this pulley support?
A: This pulley is compatible with GT2 / 2GT synchronous belts in 6mm, 9mm, 10mm, and 12mm widths, making it suitable for a wide range of 3D printer configurations including CoreXY, Cartesian, and Delta designs.
Q: Why is this pulley better than a generic GT2 pulley?
A: Mellow manufactures this pulley using specialist Gates-compatible tooling and machines it to a surface finish of Ra0.4µm. This tighter tolerance ensures the tooth profile perfectly matches your GT2 belt, reducing belt skip and improving print accuracy compared to generic pulleys with wider manufacturing tolerances.
Q: Does this pulley require assembly?
A: Minimal assembly is required — simply slide the pulley onto your stepper motor shaft and tighten the two included M4 set screws to secure it in place.
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.