GT2 Closed Loop Timing Belt 2mm Pitch 88–102mm | 6mm & 10mm Wide | CNC 3D Printer

Measure the center-to-center distance between your two pulleys, then calculate the required belt circumference. For GT2 belts, circumference = number of teeth × 2mm. For example, a 50-tooth belt has a 100mm (≈3.94") circumference. Most desktop 3D printer extruder drives typically use belts in the 88–102mm range. When in doubt, check your printer's BOM or parts list for the exact loop length before ordering.

GT2 closed loop belts with a fiberglass cord core are generally suited for light-to-medium loads typical of 3D printer extruder drives and small CNC axis drives. They are not designed for heavy industrial torque. If your application requires higher load capacity, the 10mm wide variant typically offers greater torque transmission than the 6mm version. Contact us if you need specific load data for your use case.

The rubber compound used in GT2 timing belts is generally resistant to moderate humidity and temperature variation found in typical workshop or garage environments. Prolonged exposure to direct UV light, petroleum-based oils, or extreme temperatures may accelerate wear. For outdoor CNC applications, inspect belts periodically and replace when signs of cracking or glazing appear.

Yes. These belts follow the GT2 (2mm pitch) tooth profile standard and are compatible with any GT2 pulley of matching width. They are designed to fit pulleys commonly used in Creality Ender 3, Ender 5, CR-10, Prusa-style extruders, and most open-frame CNC routers that use GT2 drive systems. Always verify that your pulley groove width matches the belt width you select (6mm or 10mm).

Choose the width that matches your existing pulley groove. Most desktop 3D printers — including Ender 3, CR-10, and similar machines — use 6mm wide GT2 belts on their extruder and axis drives. The 10mm wide variant is typically used in heavier-duty CNC routers or custom builds where the wider belt provides additional torque capacity. Check your machine's specifications or measure your pulley groove width before ordering.

A closed loop (endless loop) belt is molded as a continuous ring with no joint or splice. This eliminates the weak point present in joined belts and ensures consistent tension and smooth power transfer throughout the belt's life. Open-end belts are cut to length and require a tensioner or clamp to secure the ends. Closed loop belts are the correct choice for fixed-distance pulley setups such as 3D printer extruder drives where the pulley spacing does not change.

For any GT2 belt, tooth count = circumference ÷ 2mm pitch. Examples: 88mm ÷ 2 = 44 teeth; 100mm ÷ 2 = 50 teeth; 102mm ÷ 2 = 51 teeth. Each variant in the size selector shows both the tooth count and circumference so you can cross-reference directly with your machine's documentation or the worn belt you are replacing.