GT2 24T-72T Timing Belt Pulley Synchronous Wheel for 6mm 10mm Width Drive Belt

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GT2 24T-72T Timing Belt Pulley Synchronous Wheel for 6mm 10mm Width Drive Belt

HomeDIYer

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By HomeDIYer®

Types: 2GT-24T

Slot Width: 7mm

Bore: 5mm

Price:

$3.93 USD

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In stock (500 units), ready to be shipped

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GT2 Timing Belt Pulleys — Precision Drive for 3D Printers, CNC & Robotics

When your motion system demands repeatable, low-backlash power transfer, a worn or mismatched pulley is the first thing to fail. Engineers, makers, and automation builders who rely on GT2 belt drives need a synchronous wheel that holds tooth profile tolerances across thousands of cycles — whether you're tuning a CoreXY printer or building a custom CNC axis.

These GT2 timing belt pulleys are machined from aluminum alloy with an anodized finish, available in tooth counts from 24T to 72T and belt slot widths of 7mm (for 6mm belts) and 11mm (for 10mm belts). Bore options span 5mm to 20mm to suit a wide range of shaft diameters. Outer diameter scales with tooth count, ranging approximately 15mm (24T) to 46mm (72T); pitch diameter follows the standard GT2 2mm pitch formula.

Typical use cases include GT2 belt-driven 3D printer axes (X/Y gantry, extruder), CNC router and laser cutter drive systems, robotic arm joints and linear actuators, and DIY automation conveyor or indexing mechanisms requiring precise synchronous motion.

✅ Compatible with standard GT2 2mm pitch timing belts in 6mm and 10mm widths. Select the matching slot width (7mm for 6mm belt / 11mm for 10mm belt) and bore size to fit your shaft.

✅ Key Features of These GT2 Timing Belt Pulleys

⚙️ Wide Tooth Count Range

Available from 24T to 72T, covering common gear ratios for 3D printers, CNC machines, and custom drive systems without the need for custom machining.

📐 GT2 2mm Pitch Profile

Conforms to the GT2 tooth profile standard, ensuring smooth meshing with GT2 belts and minimizing backlash for accurate positional control.

🔩 Multiple Bore Sizes

Bore options from 5mm to 20mm (varies by tooth count) accommodate a broad range of motor and shaft diameters, including NEMA 17 standard 5mm shafts.

📏 Dual Belt Width Support

Slot widths of 7mm (for 6mm belts) and 11mm (for 10mm belts) let you match the pulley to your belt width for proper tracking and load distribution.

🛡️ Aluminum Alloy Construction

Machined from aluminum alloy with anodized surface treatment for corrosion resistance and dimensional stability under continuous cyclic loading.

🔧 Set Screw Retention

Each pulley includes a set screw bore for secure shaft fixation, preventing rotational slip during high-speed or high-torque operation.

📐 Technical Specifications — GT2 Timing Belt Pulley

Belt Profile	GT2 (2mm pitch)
Tooth Count	24T, 25T, 26T, 28T, 30T, 32T, 35T, 36T, 38T, 40T, 42T, 45T, 48T, 50T, 55T, 60T, 70T, 72T
Belt Slot Width	7mm (fits 6mm belt) / 11mm (fits 10mm belt)
Bore Diameter	5mm, 6mm, 6.35mm, 7mm, 8mm, 10mm, 12mm, 12.7mm, 14mm, 15mm, 16mm, 17mm, 19mm, 20mm (availability varies by tooth count)
Material	Aluminum alloy, anodized
Outer Diameter	See variant options
Pitch Diameter	See variant options
Shaft Fixation	Set screw
Weight	See variant options

❓ Frequently Asked Questions

How do I choose the right tooth count for my application?

Tooth count determines the pitch diameter and affects your drive ratio. For 3D printers using NEMA 17 motors, 20T is common but 24T–40T are widely used for different step-per-mm targets. Larger tooth counts increase pitch diameter, which raises belt speed per motor revolution. Match the tooth count on both the drive and idler pulleys to your desired motion resolution and speed.

What belt width should I select — 6mm or 10mm?

Choose the slot width that matches your belt. The 7mm slot width is designed for standard 6mm GT2 belts used in most desktop 3D printers. The 11mm slot width is for 10mm GT2 belts, which are common in heavier-duty CNC and laser cutter applications where higher load capacity is needed. Using a mismatched width will cause the belt to track incorrectly.

How do I select the correct bore size?

Measure your motor or shaft diameter precisely with calipers. NEMA 17 stepper motors typically have a 5mm shaft. Larger servo motors and CNC spindles may use 6mm, 6.35mm (1/4 inch), 8mm, or larger shafts. Select the bore that matches your shaft diameter exactly — a loose bore will cause runout and positional error even with the set screw tightened.

Are these pulleys compatible with open-loop and closed-loop motion systems?

Yes. GT2 pulleys are used in both open-loop stepper-driven systems (common in 3D printers) and closed-loop servo systems (common in CNC and robotics). The GT2 tooth profile provides low backlash, which is important for closed-loop accuracy. Ensure the belt tension is properly set regardless of control method.

How resistant are these pulleys to corrosion and wear?

The aluminum alloy body with anodized finish provides good resistance to oxidation and light corrosion in typical indoor workshop and lab environments. The anodized layer also adds surface hardness, reducing wear at the belt-tooth interface. For outdoor or high-humidity environments, periodic inspection is recommended.

Can I use these pulleys with GT2 belts from other brands?

Yes, as long as the belt conforms to the GT2 2mm pitch standard. GT2 is an open industry profile, so pulleys and belts from different manufacturers are interchangeable provided the pitch and width match. Always verify the belt pitch (2mm) and width (6mm or 10mm) before ordering.

What is the difference between 6.35mm and 1/4 inch bore?

6.35mm is the metric equivalent of 1/4 inch (25.4mm ÷ 4 = 6.35mm). These are the same dimension. If your shaft is specified as 1/4 inch, select the 6.35mm bore option. This bore size is common on imperial-spec motors and shafts used in North American CNC and robotics applications.

🛒 Select your tooth count, slot width, and bore size above, then add to cart.