GT2 14-30T Timing Pulley 6/10mm Belt Synchronous Wheel Gear3D Printer Bore3-15mm

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GT2 14-30T Timing Pulley 6/10mm Belt Synchronous Wheel Gear3D Printer Bore3-15mm

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Number of teeth - width of teeth: 14 Teeth - Width 7mm

Through Hole - Keyway Hole: 4mm

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$2.84 USD

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In stock (500 units), ready to be shipped

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GT2 Timing Pulley 14–30T — Precision Synchronous Drive for 3D Printers & CNC

When belt slip or misalignment is costing you print quality or cutting accuracy, the root cause is often an undersized or poorly matched timing pulley. Makers, robotics engineers, and CNC builders who demand repeatable motion need a GT2 synchronous wheel that holds tolerance across thousands of cycles without play or wobble.

These GT2 timing pulleys are machined from aluminum alloy and are available in tooth counts from 14T to 30T, with belt widths of 7mm (6mm belt) or 11mm (10mm belt). Bore options span 3mm to 15mm (approximately 0.12 in to 0.59 in), including standard through-holes and keyway variants (K 3mm or K 4mm) for positive shaft locking. Outer diameter scales with tooth count, typically ranging from approximately 9mm to 20mm (0.35 in to 0.79 in).

Typical use cases include FDM 3D printer X/Y axis drives using GT2 6mm belt, CNC router and laser engraver feed systems requiring GT2 10mm belt for higher torque, and lightweight robotics or automation rigs where a low-backlash synchronous wheel with a keyway bore ensures zero shaft slip under load.

⚙️ Compatibility: Designed for GT2 2mm pitch timing belts. 7mm-width pulleys pair with GT2 6mm belts; 11mm-width pulleys pair with GT2 10mm belts. Verify bore diameter and keyway dimensions against your shaft before ordering.

✅ Key Features of These GT2 Timing Pulleys

🦷 Wide Tooth Count Range

Available from 14T to 30T, covering common gear ratios for 3D printer axes, extruder drives, and CNC feed systems without custom machining.

📏 Dual Belt Width Options

Choose 7mm-wide pulleys for standard GT2 6mm belt applications or 11mm-wide pulleys for GT2 10mm belt setups that carry higher lateral loads.

🔩 Broad Bore Selection

Through-hole bores from 3mm to 15mm (including 3.175mm and 6.35mm imperial equivalents) fit a wide range of motor shafts and lead screws out of the box.

🔑 Keyway Variants Available

Select keyway options (K 3mm or K 4mm) for positive mechanical locking on keyed shafts, eliminating rotational slip under high-torque or reversing loads.

⚖️ Aluminum Alloy Construction

Lightweight aluminum body keeps rotating inertia low for fast acceleration in 3D printer motion systems while maintaining dimensional stability across operating temperatures.

🔄 GT2 2mm Pitch Standard

Fully compatible with the GT2 2mm pitch belt standard used across Voron, Ender, CoreXY, and most open-source CNC and robotics platforms.

📐 Technical Specifications — GT2 Timing Pulley

Belt Pitch	GT2 — 2mm
Tooth Count	14T / 15T / 16T / 18T / 20T / 22T / 24T / 25T / 26T / 28T / 30T
Belt Width Compatibility	7mm (GT2 6mm belt) / 11mm (GT2 10mm belt)
Bore Diameter	3 / 3.175 / 4 / 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15mm (see variant options)
Keyway Options	None (through-hole) / K 3mm / K 4mm (see variant options)
Outer Diameter	See variant options
Material	Aluminum alloy
Finish	Natural anodized / milled aluminum
Flange	Flanged (standard for belt retention)
Set Screw	See variant options
Weight (per piece)	See variant options

❓ Frequently Asked Questions

How do I choose the right tooth count for my 3D printer or CNC?

Tooth count determines your drive ratio and steps-per-mm. For most Cartesian and CoreXY 3D printers, 20T is the standard choice on a NEMA 17 motor shaft. Smaller counts (14T–16T) increase resolution but reduce top speed; larger counts (24T–30T) increase speed but reduce torque. Match your firmware steps-per-mm setting after changing tooth count.

What is the difference between the 7mm-width and 11mm-width pulleys?

The 7mm-width pulley is designed to run with a GT2 6mm-wide belt, which is the most common width in desktop 3D printers. The 11mm-width pulley pairs with a GT2 10mm-wide belt, which handles higher lateral forces and is preferred in heavier CNC routers, laser cutters, and industrial automation rigs where belt tracking stability matters.

Do I need a keyway bore, or will a standard through-hole work?

A standard through-hole bore with a set screw is sufficient for most 3D printer and light-duty CNC applications where torque is moderate and direction reversals are infrequent. A keyway bore (K 3mm or K 4mm) is recommended when your motor shaft has a matching keyway, when loads are high, or when the drive reverses frequently — the key prevents any rotational slip that a set screw alone cannot guarantee under shock loads.

Which bore size fits a standard NEMA 17 stepper motor shaft?

Standard NEMA 17 stepper motors have a 5mm diameter output shaft. Select the 5mm bore variant for a direct fit. If your motor has a D-cut shaft, a set screw tightened against the flat provides secure retention without a keyway.

Are these pulleys compatible with Voron, Ender 3, and other open-source printer designs?

Yes. These pulleys follow the GT2 2mm pitch standard used across Voron 0/1/2/Trident, Creality Ender series, Prusa-style printers, and most open-source CoreXY and bed-slinger designs. Verify the bore diameter and tooth count match your specific BOM before ordering.

How do I confirm the correct bore diameter before purchasing?

Measure your motor or shaft diameter with a digital caliper. Common sizes are 5mm (NEMA 17), 6.35mm (1/4 inch imperial shafts), 8mm (NEMA 23 and lead screws), and 10mm or 12mm for larger servo or spindle shafts. If your shaft has a keyway slot, also measure the keyway width to select the matching K 3mm or K 4mm variant.

What material are these timing pulleys made from, and will they corrode?

The pulleys are machined from aluminum alloy with a natural anodized or milled finish. Aluminum has inherent corrosion resistance suitable for indoor workshop, laboratory, and enclosed printer environments. For outdoor or high-humidity applications, periodic light lubrication of the bore contact surface is advisable.

🛒 Select your tooth count, belt width, and bore diameter above, then add to cart.