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When your CNC router skips steps or your 3D printer loses positional accuracy, the culprit is often a mismatched or worn drive pulley. Engineers, makers, and automation builders who demand repeatable, low-backlash motion need a GT2 6mm timing belt drive pulley they can rely on across every axis and every build.
This listing covers GT2-profile 6mm-wide timing belt pulleys and matching open-loop belt. The pulleys are machined from aluminum alloy with a set-screw bore retention system. Tooth counts range from 16T to 80T, with bore diameters of 5 mm (~0.197 in), 6 mm (~0.236 in), 6.35 mm (~0.250 in / ¼ in), 8 mm (~0.315 in), and 10 mm (~0.394 in). The 2GT belt option is 6 mm wide with a 2 mm pitch. Select your exact combination from the variant options above.
Typical use cases include: DIY CoreXY and Cartesian 3D printer motion systems requiring GT2 6mm belt pulley sets; desktop CNC router X/Y axis drives using aluminum timing pulley 2GT 6mm configurations; and lightweight robotic arm joints and pick-and-place automation where a low-tooth-count GT2 idler pulley or drive wheel keeps the footprint compact.
Engineered to the GT2 (2GT) tooth profile standard, ensuring smooth meshing with 6 mm GT2 belts and minimizing backlash in both directions of travel.
Choose from 16, 20, 30, 32, 36, 40, 48, 60, or 80 teeth to dial in your drive ratio. More teeth = larger pitch diameter = higher linear speed per motor revolution.
Fits the most common stepper and servo motor shaft diameters used in desktop CNC and 3D printing, including the standard ¼-inch (6.35 mm) shaft found on many NEMA 17 variants.
Lightweight yet rigid aluminum body keeps rotational inertia low — critical for high-acceleration motion profiles — while maintaining dimensional stability under continuous operation.
Each pulley wheel includes a set screw for secure shaft clamping. Prevents slippage under load without requiring adhesives or press-fit tooling.
The 2GT Belt (Width 6mm) variant lets you source belt and pulleys in one order, simplifying BOM management for new builds or replacement kits.
| Belt Profile | GT2 / 2GT |
|---|---|
| Belt Width | 6 mm (0.236 in) |
| Pitch | 2 mm (0.079 in) |
| Tooth Count Options | 16T, 20T, 30T, 32T, 36T, 40T, 48T, 60T, 80T |
| Bore Diameter Options | 5 mm, 6 mm, 6.35 mm, 8 mm, 10 mm |
| Pulley Material | Aluminum alloy |
| Bore Retention | Set screw |
| Flange | See variant options |
| Pulley Width (hub + teeth) | See variant options |
| Weight (per pulley) | See variant options |
| Finish | Natural anodized / milled aluminum |
| Packing Quantity | 1 pc per order (multi-pack options available) |
Tooth count determines the pitch diameter of the pulley, which directly affects your steps-per-mm (or steps-per-degree) calculation. Lower tooth counts (16T–20T) are common on NEMA 17-driven 3D printer axes for compact geometry. Higher tooth counts (40T–80T) are used where a larger pitch diameter is needed to increase linear speed or reduce motor torque requirements. Match your tooth count to your motion controller's configuration and desired resolution.
Most NEMA 17 stepper motors ship with a 5 mm output shaft. Select the 5 mm bore variant for a direct fit. Some motors — particularly those used in CNC spindle or extruder applications — use a 6 mm or 6.35 mm (¼ in) shaft; check your motor's datasheet before ordering.
Yes. The GT2 (2GT) tooth profile is an open industry standard. These pulleys are designed to mesh with any GT2-profile belt that is 6 mm wide with a 2 mm pitch, regardless of brand. This includes belts used on Creality Ender, Voron, RatRig, and similar platforms.
The set screw provides adequate clamping force for typical desktop CNC and 3D printer torque loads when properly tightened against a flat on the motor shaft (if present). For high-torque or high-speed applications, ensure the set screw is tightened with the correct hex key and consider applying a small amount of thread-locking compound. Slippage is most common when the screw is under-torqued or the shaft has no flat.
Aluminum alloy naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor workshop or lab environments. For high-humidity or outdoor enclosures, an anodized finish (if present on your variant) adds additional protection. Avoid prolonged exposure to salt spray or strong acids.
The wheel variants in this listing are drive pulleys with a bore designed to clamp onto a motor shaft via set screw. They are not pre-configured as idler pulleys (which typically use a smooth bore and a bearing). However, you can use them as idlers by inserting an appropriately sized bearing into the bore — check that your chosen bore diameter matches your bearing's outer race diameter.
The "2GT Belt【Width 6mm】" variant is an open-loop GT2 timing belt (sold by length or as a fixed-length loop depending on stock). The "Wheel" variants are the aluminum drive pulleys in various tooth counts and bore sizes. For a complete drive system you need both a pulley (wheel) and a belt — you can add both to your cart from this listing.
