
1Mellow work team
Thank you for coming to our shop. We are committed to developing 3D printer accessories that can be used on all 3D printers. We have 3 main product lines: NF Extruders, NF Hotends and FLY Motherboards and Electronics. We hope our products will bring you better overall experience. If you have any ideas (products, use, sales), please contact us. We look forward to hearing from you.
1Description
Upgrade your machine’s motion system with the Mellow LL-1.5GT Timing Belt & Pulley Kit, engineered for high-precision, low-backlash transmission. This complete set pairs genuine GATES PowerGrip GT timing belts with precision CNC-machined aluminum pulleys — including both drive pulleys and idler pulleys — to deliver smoother motion, reduced noise, and longer service life for your 3D printers, CNC machines, and custom automation builds.
GT2 timing belts are factory standard for most consumer 3D printers, but their 2mm tooth pitch limits precision and high-speed printing performance. Mellow releases the brand-new LL-1.5GT GATES timing belt & pulley upgrade kit for premium 3D printers.
Compared with common GT2 transmission kits, Mellow GT1.5 features multiple premium upgrades:
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Higher Positioning Precision: Fine 1.5mm tooth pitch vs traditional 2mm pitch greatly improves motion resolution, perfect for delicate reliefs and precise mechanical parts.
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Compact Structure: Compatible with smaller-diameter pulleys to save frame space, great for mini CoreXY machines like Voron 0.1.
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Superior Dynamic Response: Lightweight pulleys with low rotational inertia offer snappy movement during high-speed travel and frequent direction switches.
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LL Low-Backlash Design: Custom LL tooth profile enables tight meshing, eliminates transmission backlash and improves repeat positioning accuracy.
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VFA Artifact Reduction: Effectively suppress vertical fine ripples to deliver ultra-smooth print surfaces.
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Quiet Operation: Reduced meshing impact avoids shrill squealing at high speed, quiet enough for enclosed chamber printers.
- Low Stretch & Long-Term Stability: Aramid-core belt resists deformation under long hot-chamber printing, less frequent tension adjustment needed.
Specification:
Tooth quantity:27T(Replaces GT2 20-tooth)/21T(Replaces GT2 16-tooth) The Inner hole:5mm
Model: With tooth/ Without tooth
Material: Aluminum alloy
Color: as picture shows
Application arrange: 3D printer
Key Features
- Genuine GATES Belts: Made with premium rubber and fiberglass tensile cords for superior strength, low stretch, and long-lasting durability.
- High-Precision Pulleys: CNC-machined aluminum pulleys with accurate tooth profiles ensure smooth meshing, reduced vibration, and minimal noise.
- Complete Drive Solution: Available in two configurations to meet your exact mechanical needs.
- Multi-Width Options: Choose from 6mm, 9mm, 10mm, or 12mm widths to perfectly match your torque and space requirements.
1Packge
21T-5MM Inner Hole 7mm*16mm
27T-5MM Inner Hole
For 6mm Belt-7mm*8.5mm Idler/7mm*10mm Idler/7mm*16mm Pulley
For 9mm/10mm Belt-11mm*14mm Idler/11mm*20mm Pulley
For 12mm Belt-13mm*16mm Idler/13mm*22mm Pulley
20T Without tooth -5MM Inner Hole
For 6mm Belt-7mm*8.5mm Idler/7mm*10mm Idler
For 9mm/10mm Belt-11mm*14mm Idler
For 12mm Belt-13mm*16mm Idler
Belit:6mm/9mm/10MM/12MM















