GT2 Closed-Loop Timing Belt - 6mm Width, 200mm Length, 2mm Pitch

Specifications

• Belt Profile: GT2 (Rounded Tooth)

• Loop Type: Closed-Loop (Continuous)

• Pitch (Tooth-to-Tooth): 2.0 mm

• Total Length (Perimeter): 200 mm

• Total Tooth Count: 100 Teeth

• Belt Width: 6 mm

• Material: Neoprene Rubber

• Core Reinforcement: Fiberglass / Kevlar

• Color: Black

Key Applications and Projects

• 3D Printer Extruders: Acting as the primary power transmission belt for compact, geared filament extruders (like the Voron Stealthburner or custom direct-drive setups).

• RC Drivetrains: Transferring high-RPM power from a brushless motor down to the main drive shaft of a 1/16th scale remote-controlled car.

• Automated Camera Lenses: Wrapping around a DSLR camera lens and linking to a stepper motor for automated, vibration-free follow-focus pulls.

Unlock New Capabilities (Project Evolution)

• The Cinematic Motorized Follow-Focus: Don't touch the camera lens by hand and risk shaking your cinematic video! Evolve your videography! Wrap a large 3D-printed GT2 ring gear around the focus ring of your DSLR lens. Mount a tiny NEMA 14 stepper motor with a 20T pulley to your camera rail. Link them together perfectly with this compact 200mm closed-loop belt. Driven by an Arduino and a potentiometer knob mounted to a handle, you now have a professional, buttery-smooth electronic follow-focus rig!

Package Includes:

• 1 x Closed-Loop GT2 Timing Belt (6mm Width, 200mm Length)

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What does "GT2" mean? "GT2" stands for "Gates Tooth 2mm." It is a specific tooth profile with rounded edges engineered to prevent backlash (slop) when interlocking with pulleys.

2. What is the width of this belt? It is exactly 6mm wide, which is the industry standard for most desktop 3D printers and NEMA 17 motor pulleys.

3. What is the total length? The total circumference (perimeter) of this compact closed loop is 200mm.

4. How many teeth does it have? Given the 200mm length and the 2mm pitch (distance between teeth), the belt features exactly 100 teeth.

5. If I stretch it between two pulleys, how far apart will they be? Ignoring the wrap-around circumference of the pulleys themselves, the center-to-center distance between two small pulleys would be roughly 85mm to 95mm (around 3.5 inches).

6. Is this belt stretchy like a rubber band? No. While the outer jacket is made of neoprene rubber, it features an internal fiberglass or Kevlar core that prevents it from stretching under tension.

7. What does "closed-loop" mean? It signifies that the belt is manufactured as one continuous, unbroken circle directly from the factory, making it immensely strong without a weak splice point.

8. Can I cut this to use as an open belt? Yes, cutting it with scissors will yield a 200mm long open GT2 belt, though this length is usually too short for X/Y axis gantry movements.

9. Will this work with T2.5 pulleys? No. T2.5 pulleys utilize a square tooth profile and a 2.5mm pitch. You must use GT2 (2mm pitch) pulleys.

10. How do I tension a short closed-loop belt like this? Because the loop is so small, you typically don't use idler pulleys. Instead, you tension it by mounting the motor on slotted screw holes and physically sliding the entire motor away from the secondary shaft before tightening the bolts.

11. Does this belt need lubrication? Absolutely not. Timing belts run perfectly dry. Applying oils or grease will degrade the neoprene rubber and cause the teeth to slip.

12. Can I connect two of these belts together to make a 400mm loop? No. There is no reliable DIY method to splice two timing belts together while maintaining the exact 2mm tooth pitch and structural integrity under tension.

13. Is the belt directional? No. The belt is perfectly symmetrical and performs equally well rotating clockwise or counter-clockwise.

14. What temperature can this belt withstand? Standard fiberglass-reinforced neoprene timing belts operate safely in environments up to roughly 85°C (185°F).

15. How tight should I make the belt? It should be taut enough to eliminate any visible slack, but not so tight that it bows your 5mm motor shafts or grinds out your motor bearings.

16. Can I use this for a 3D printer extruder? Yes! 200mm and 188mm belts are incredibly popular for building custom, geared "Direct Drive" extruders to push filament.

17. Can I wash the belt if it gets dusty? You can wipe it down with a dry or slightly damp microfiber cloth. Avoid harsh chemical solvents like acetone.

18. What happens if I skip a tooth while installing? On a simple gear reduction, skipping a tooth during installation doesn't matter (the ratio remains the same). However, if you are synchronizing two timed shafts, it will throw their alignment off by exactly 2mm.

19. How long will this belt last? Under normal indoor robotics use with proper tension, a high-quality reinforced GT2 belt will easily last for thousands of hours of continuous operation.

20. Is there a smooth side to the belt? Yes, the inside circumference features the 100 rounded teeth, while the outside back of the belt is completely smooth.