Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts
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Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm BeltsTiming Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm BeltsTiming Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm BeltsTiming Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm BeltsTiming Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm BeltsTiming Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm BeltsTiming Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts

Timing Belt Pulley Bore=3~10mm GT2 Pulley AF-type 20~24 Teeth for 10 mm Belts

HomeDIYer
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By HomeDIYer®

Price:
$12.09 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 AF-Type Timing Belt Pulley — Precision 2GT Drive for 10 mm Belts

When your 3D printer skips steps, your CNC router loses position, or your DIY linear drive slips under load, the culprit is almost always a mismatched or worn pulley. Makers, engineers, and small-workshop builders who rely on GT2 belt systems need a pulley that seats cleanly on the shaft, meshes accurately with the belt, and holds its position under repeated cycling — without play or wobble.

These GT2 AF-type timing belt pulleys are machined from aluminum alloy with an anodized finish, featuring a flanged (AF) body that keeps the 10 mm wide belt tracking on the pulley face. Available in 20T, 22T, and 24T tooth counts, with bore diameters ranging from 3 mm to 10 mm (approximately 0.12 in to 0.39 in). The 2GT tooth profile — 2 mm pitch — is the standard used across most desktop motion systems.

Typical use cases include GT2 belt-driven 3D printer axes (X/Y gantry drives), CNC router and laser engraver feed systems, and compact DIY automation conveyor or pick-and-place rigs where repeatable positioning over a 2 mm pitch belt is required.

⚙️ Compatibility: Designed for 2GT / GT2 open-loop or closed-loop timing belts, 10 mm belt width. Bore options: 3 / 4 / 5 / 6 / 6.35 / 8 / 10 mm. Tooth counts: 20T, 22T, 24T. Confirm your shaft diameter and belt width before ordering.

✅ Key Features of These GT2 AF-Type Timing Belt Pulleys

🦷
20T / 22T / 24T Tooth Options

Three tooth counts let you tune your drive ratio or match an existing system. The 2 mm pitch (2GT) profile ensures accurate belt engagement and low backlash across all counts.

🔩
AF Flanged Body Design

The integrated flanges on both sides of the pulley face keep the 10 mm belt centered during operation, reducing edge wear and preventing belt walk on horizontal or vertical axes.

📐
Wide Bore Range: 3–10 mm

Eight bore diameter options (3, 4, 5, 6, 6.35, 8, 10 mm) cover the most common stepper motor and servo shaft sizes used in desktop CNC and 3D printing platforms.

🏗️
Aluminum Alloy Construction

Machined aluminum body keeps rotating mass low — important for high-acceleration axes — while providing sufficient rigidity for continuous-duty belt drive applications.

🔄
10 mm Belt Width Compatibility

Matched to standard 10 mm wide GT2 belts used in larger-format 3D printers, laser cutters, and CNC routers. Verify belt width before selecting — not compatible with 6 mm belt systems.

📦
Flexible Quantity Packs

Available in packs of 1, 2, 3, 4, 5, or 10 pieces. Order spares for maintenance stock or buy in quantity for multi-axis builds and small-batch production runs.

📐 Technical Specifications — GT2 AF-Type Timing Belt Pulley

Belt Profile 2GT (GT2), 2 mm pitch
Tooth Count 20T / 22T / 24T (see variant options)
Belt Width 10 mm
Bore Diameter 3 / 4 / 5 / 6 / 6.35 / 8 / 10 mm (see variant options)
Body Type AF (flanged, aluminum)
Material Aluminum alloy
Flange Integrated dual flange
Set Screw See variant options
Outer Diameter See variant options
Hub Length See variant options
Quantity per Pack 1 / 2 / 3 / 4 / 5 / 10 pcs (see variant options)

❓ Frequently Asked Questions

How do I choose between 20T, 22T, and 24T?

The tooth count determines your drive ratio and linear travel per motor revolution. A 20T pulley on a 2 mm pitch belt moves 40 mm per revolution; 22T moves 44 mm; 24T moves 48 mm. Choose based on your desired steps-per-mm (for 3D printers) or feed rate (for CNC). Lower tooth counts give finer resolution per step; higher counts give faster travel at the same RPM.

Which bore size should I select for my stepper motor?

Match the bore to your motor shaft diameter. Common stepper motor shaft sizes: NEMA 17 typically uses 5 mm shafts; NEMA 23 typically uses 6.35 mm (1/4 in) or 8 mm shafts; NEMA 34 often uses 10 mm shafts. Measure your shaft with calipers before ordering — do not rely on motor model alone, as shaft sizes vary by manufacturer.

Are these pulleys compatible with 6 mm wide GT2 belts?

No. These AF-type pulleys are designed for 10 mm wide GT2 belts. The flanged face width is matched to 10 mm belt width. Using a 6 mm belt on a 10 mm pulley will result in poor tracking and potential belt damage. If you need pulleys for 6 mm belts, please select the appropriate product variant from our catalog.

What does the "AF" designation mean?

"AF" stands for the flanged body style — the pulley has integrated flanges (raised edges) on both sides of the toothed face. These flanges keep the belt centered on the pulley during operation, which is especially important on horizontal axes or any application where the belt might otherwise walk sideways. Non-flanged pulleys (sometimes called "smooth" or "idler" types) lack these edges.

How strong are aluminum GT2 pulleys for continuous-duty use?

Aluminum alloy pulleys are well-suited for the belt tensions typical in desktop 3D printers, laser engravers, and light CNC routers. For heavy-duty industrial conveyor or high-torque applications with significant radial loads, steel pulleys may be more appropriate. For the motion systems these pulleys are designed for, aluminum provides an excellent balance of strength and low rotational inertia.

Do these pulleys include a set screw for shaft retention?

Set screw configuration varies by variant. Please refer to the variant detail or contact us to confirm the set screw specification for your selected bore size and tooth count before ordering. For critical applications, we recommend verifying the retention method matches your shaft and torque requirements.

Can I use these in a CoreXY or H-bot 3D printer build?

Yes. GT2 AF-type pulleys are commonly used in CoreXY, H-bot, and Cartesian 3D printer designs. The 20T count is the most common choice for these systems. Ensure your belt path geometry matches the pulley tooth count and that idler pulleys (smooth bore) are used at direction-change points — these flanged drive pulleys are for motor shaft mounting.

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

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