GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad
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GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad

GT2 Zahnrad - Pulley-20-80 Zähne Zahnrad-Pulley Breite 6mm Zahnriemenrad

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Price:
$4.42 USD
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In stock (500 units), ready to be shipped

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Description

GT2 Timing Belt Pulleys — Precise Motion Control for DIY Automation Projects

When your 3D printer skips steps, your CNC router loses position, or your belt-driven axis drifts mid-run, the culprit is often a mismatched or worn pulley. Makers, hobbyists, and small-workshop engineers who demand repeatable accuracy need a GT2 timing belt pulley they can trust to mesh cleanly and hold its bore without slipping.

These GT2 timing belt pulleys are machined from aluminum alloy with a 6mm belt width (6mm / ~0.24 in) and are available in tooth counts from 20 to 80 teeth, with bore diameters ranging from 3mm to 15mm (approximately 0.12 in to 0.59 in). Each pulley features a standard GT2 tooth profile with 2mm pitch, and includes a set-screw bore for secure shaft mounting.

Typical use cases include open-loop stepper-driven 3D printer X/Y axes, DIY CNC router gantry drives, laser engraver carriage systems, and custom belt-driven linear actuators where a compact GT2 timing belt pulley with a precise bore fit is essential for smooth, low-backlash motion.

⚙️ Compatible with: GT2 2mm-pitch timing belts, 6mm belt width — fits NEMA 17 / NEMA 23 stepper motor shafts (bore to suit); suitable for RepRap, Ender, Voron, and custom CNC builds.

✅ Key Features of These GT2 Timing Belt Pulleys

🦷 Wide Tooth Range (20–80 Teeth)

Choose the exact gear ratio your drive system needs — from compact 20-tooth drive pulleys to large 80-tooth idler or reduction pulleys, all sharing the same GT2 2mm pitch profile.

🔩 Multiple Bore Options (3–15mm)

Available in bore diameters of 3, 4, 5, 6, 6.35, 8, 10, 12, 12.7, 14, and 15mm to fit a wide range of stepper motor shafts, including imperial 1/4" (6.35mm) and 1/2" (12.7mm) sizes.

🏗️ Aluminum Alloy Construction

Lightweight yet rigid aluminum alloy body keeps rotational inertia low while providing the structural stiffness needed for consistent belt engagement under load.

📐 Standard GT2 2mm Pitch Profile

Fully compatible with all standard GT2 open and closed timing belts. The 2mm pitch tooth geometry minimizes backlash and ensures positive engagement across the full belt width.

🔧 Set-Screw Bore Mounting

Each pulley includes a set-screw (grub screw) for secure shaft clamping. Tighten against a flat on the motor shaft for maximum torque transfer without bore slippage.

🔄 Broad Application Compatibility

Designed for 3D printers (Cartesian, CoreXY, delta), CNC routers, laser engravers, pick-and-place machines, and any custom belt-driven linear motion system requiring a reliable GT2 timing belt pulley.

📐 Technical Specifications — GT2 Timing Belt Pulley

Belt Profile GT2 (2mm pitch)
Belt Width 6mm (0.24 in)
Tooth Count 20 / 22 / 24 / 25 / 26 / 28 / 30 / 32 / 34 / 35 / 36 / 38 / 40 / 45 / 48 / 50 / 55 / 60 / 70 / 80
Bore Diameter 3 / 4 / 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15mm (see variant options)
Material Aluminum alloy
Mounting Set-screw (grub screw) bore
Outer Diameter See variant options
Hub Width See variant options
Flange See variant options
Finish Natural anodized / machined aluminum
Quantity 1 piece per order

❓ Frequently Asked Questions

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

The tooth count determines your drive ratio and belt speed. For most 3D printer X/Y axes, a 20-tooth pulley on the motor paired with a matching 20-tooth idler gives a 1:1 ratio. If you need speed reduction or torque multiplication, pair a smaller drive pulley (e.g., 20T) with a larger driven pulley (e.g., 40T) for a 2:1 reduction. Count the teeth on your existing pulley or check your machine's BOM before ordering.

Which bore size should I select for a NEMA 17 stepper motor?

Standard NEMA 17 stepper motors have a 5mm output shaft diameter. Select the 5mm bore variant. If your motor has a flat (D-shaft), tighten the set-screw against the flat for a secure, slip-free connection. For NEMA 23 motors, the shaft is typically 6.35mm (1/4") — choose the 6.35mm bore variant accordingly.

Are these pulleys compatible with GT2 belts from other brands?

Yes. These pulleys follow the standard GT2 2mm pitch tooth profile, which is an open standard. They are compatible with any GT2 timing belt — open-loop or closed-loop — with a 6mm width, regardless of brand. Avoid mixing GT2 pulleys with HTD or MXL belts, as the tooth profiles are not interchangeable.

How do I prevent the pulley from slipping on the shaft?

Use the included set-screw and tighten it firmly against a flat on the motor shaft using a hex key (Allen wrench). If your shaft is round with no flat, consider filing a small flat or using a thread-locking compound (e.g., Loctite 243) on the set-screw threads. Avoid over-tightening, which can strip the set-screw thread in the aluminum hub.

What is the difference between a 20-tooth and an 80-tooth pulley in terms of print/cut resolution?

With a GT2 2mm pitch belt, a 20-tooth pulley moves the belt 40mm per revolution (20 × 2mm). An 80-tooth pulley moves 160mm per revolution. Using a smaller pulley on your motor shaft gives finer positional resolution per motor step, which is why 20T pulleys are standard on most 3D printer motion systems. Larger pulleys are typically used as idlers or in reduction stages.

Are these pulleys suitable for CoreXY and Voron printer builds?

Yes. CoreXY and Voron designs commonly use 20-tooth GT2 pulleys on motor shafts and toothed or smooth idler pulleys at belt routing points. These pulleys are compatible with those configurations. For idler positions, you may also need a flanged bearing insert — check your specific printer's BOM for the exact idler pulley specification.

Can I use these pulleys for a laser engraver or CNC router?

Absolutely. GT2 timing belt pulleys are widely used in diode laser engravers and small-format CNC routers for X and Y axis drives. The aluminum construction handles the speeds and loads typical of these machines. Select the tooth count and bore that match your existing belt and motor shaft specifications.

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

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