GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad
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GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm ZahnriemenradGT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad

GT2 Zahnrad - Pulley-20-80 Zähne Riemenscheibe Breite 11mm Zahnriemenrad

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By HomeDIYer®

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

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Description

GT2 Timing Pulley 20–80 Teeth — Reliable Drive for DIY Automation

When your 3D printer skips steps or your CNC axis loses position, the culprit is often a mismatched or worn timing pulley. Makers, hobbyists, and small workshop operators who demand repeatable motion need a GT2 timing pulley that fits precisely and holds its position under load. These GT2 pulleys are engineered for exactly that use case.

Each pulley is machined from aluminum alloy with a black anodized finish, featuring a 2mm GT2 tooth profile and an 11mm belt width. Bore diameters range from 3 mm to 15 mm (approximately 0.12 in to 0.59 in), and tooth counts span 20 to 80 teeth — covering a wide range of gear ratios for your drive system.

Typical applications include GT2 belt drive systems for FDM 3D printers (X/Y axis), CNC router axis drives, laser engraver gantry systems, and custom DIY linear motion platforms requiring precise, low-backlash power transmission.

⚙️ Compatibility: Designed for standard GT2 2mm pitch timing belts with 6mm or 10mm width. The 11mm pulley width is optimized for 6mm and 10mm GT2 belts. Verify your shaft diameter before ordering — bore sizes vary by variant.

✅ Key Features of These GT2 Timing Pulleys

🔩 Wide Tooth Count Range

Available in 20 to 80 teeth, enabling flexible gear ratio selection for speed or torque optimization in your drive system.

📐 Precision GT2 Tooth Profile

2mm pitch GT2 tooth geometry ensures low backlash and accurate positioning — critical for 3D printer and CNC axis repeatability.

🔧 Multiple Bore Sizes

Bore options from 3 mm to 15 mm (approx. 0.12–0.59 in) accommodate a broad range of motor shaft and drive shaft diameters.

🏗️ Aluminum Alloy Construction

Lightweight yet rigid aluminum alloy body keeps rotational inertia low while maintaining structural integrity under continuous belt tension.

🛡️ Anodized Surface Finish

Black anodized coating provides corrosion resistance and a clean appearance, suitable for both enclosed and open-frame machine builds.

⚡ Set Screw Retention

Includes set screw(s) for secure shaft fixation — typically 1–2 set screws per pulley depending on tooth count. Prevents slippage during operation.

📐 Technical Specifications — GT2 Timing Pulley

Belt Profile GT2 (2mm pitch)
Belt Width Compatibility 11mm (fits 6mm and 10mm GT2 belts)
Tooth Count Range 20 – 80 teeth
Bore Diameter Range 3 mm – 15 mm (approx. 0.12 – 0.59 in)
Material Aluminum alloy
Surface Finish Black anodized
Outer Diameter See variant options
Hub Width Typically 11 mm
Set Screw Included (quantity varies by tooth count)
Weight See variant options

❓ Frequently Asked Questions

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

Tooth count determines your drive ratio. A smaller pulley on the motor paired with a larger pulley on the driven shaft reduces speed and increases torque. For most 3D printer X/Y axes, 20-tooth pulleys are standard. For CNC routers requiring more torque or a specific linear travel per motor revolution, higher tooth counts (30–60T) are common. Calculate your required steps/mm or mm/rev to select the correct pairing.

What bore size should I order for my stepper motor shaft?

Most NEMA 17 stepper motors have a 5mm shaft diameter. NEMA 23 motors typically use 6.35mm (1/4 inch) shafts. Measure your motor shaft with calipers before ordering. The bore must match your shaft exactly — a loose bore will cause slippage even with the set screw tightened.

Are these pulleys compatible with standard GT2 belts?

Yes. These pulleys use the standard GT2 2mm pitch tooth profile and are compatible with GT2 timing belts of 6mm or 10mm width. The 11mm pulley width provides adequate belt contact for both belt widths. Ensure your belt pitch matches — GT2 belts are not interchangeable with T2.5 or MXL profiles.

How strong are aluminum GT2 pulleys compared to plastic ones?

Aluminum alloy pulleys are significantly more rigid and dimensionally stable than printed or injection-molded plastic pulleys. They resist deformation under belt tension, maintain tooth geometry over time, and handle higher operating temperatures. For any application requiring consistent positioning accuracy, aluminum is the recommended material.

Do these pulleys resist corrosion in humid or workshop environments?

The black anodized finish provides a hard oxide layer that resists light corrosion and surface oxidation in typical workshop and indoor environments. For outdoor or high-humidity applications, additional protective measures may be advisable. The anodizing also improves surface hardness compared to bare aluminum.

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

Yes. GT2 timing pulleys are widely used in laser engraver gantry systems and CNC router axis drives. Select the tooth count that matches your desired travel per motor step, and ensure the bore matches your motor shaft. Pair with an appropriately tensioned GT2 belt for best positioning accuracy and minimal backlash.

How do I secure the pulley to the shaft?

Each pulley includes one or two set screws (M3 or M4 depending on bore size). Align the set screw with a flat on the motor shaft if available, then tighten with the appropriate hex key. For shafts without a flat, tighten firmly against the round shaft surface. Avoid over-tightening, which can strip the set screw thread or deform the bore.

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

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