GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer
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GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D PrinterGT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer

GT2 Aluminium Timing Belt Pulley 100T Wide 6/10mm Bore 6mm To25mm For 3D Printer

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Price:
$13.56 USD
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In stock (500 units), ready to be shipped

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Description

GT2 Aluminium Timing Belt Pulley 100T — Precision Motion for 3D Printers & DIY Automation

When your 3D printer, CNC router, or DIY automation rig demands consistent, slip-free motion, a worn or undersized pulley becomes the weakest link in the chain. Makers, engineers, and workshop builders who rely on GT2 belt drive systems need a GT2 aluminium timing belt pulley that holds tight tolerances across long print runs and high-cycle automation tasks.

This GT2 timing belt pulley features 100 teeth machined from 6061-series aluminium alloy, delivering a lightweight yet rigid drive component. It is compatible with both 6mm and 10mm wide GT2 timing belts, with bore sizes ranging from 6mm to 25mm (approximately 0.24 in to 0.98 in), including imperial-friendly options such as 6.35mm (1/4 in) and 12.7mm (1/2 in). Set screws are included to secure the pulley to the shaft.

Typical use cases include Cartesian and CoreXY 3D printer axis drives, open-loop CNC routing tables requiring GT2 100-tooth reduction stages, and custom belt-driven linear actuators for robotics and lab automation projects.

⚙️ Compatible with: GT2 timing belts — 6mm wide and 10mm wide | 2mm pitch | Shaft bore 6mm to 25mm (including 6.35mm, 12.7mm imperial sizes) | Fits standard 3D printer, CNC, and linear actuator drive systems

✅ Key Features of These GT2 Aluminium Timing Belt Pulleys

  • 🦷100-Tooth GT2 Profile — 2mm pitch tooth geometry matches standard GT2 belts for zero-backlash, positive engagement across the full 100-tooth wrap.
  • 🔩Aluminium Alloy Construction — Machined from lightweight aluminium alloy, reducing rotational inertia compared to steel pulleys while maintaining dimensional stability under continuous operation.
  • 📐Wide Bore Range — Available in bore sizes from 6mm to 25mm, including 6.35mm and 12.7mm imperial options, covering the most common 3D printer and CNC motor shaft diameters.
  • 🔧Dual Belt Width Support — Choose 6mm or 10mm belt width variants to match your existing GT2 belt inventory without sourcing a different pulley family.
  • 🔒Set Screw Retention — Includes set screw(s) for positive shaft locking; keyway-bore variants (e.g., 8mm 3×1.4, 10mm 4×1.8) provide additional torque resistance for higher-load applications.
  • 🖨️3D Printer & CNC Ready — Tooth count and pitch are directly compatible with RepRap, Voron, Ender, and most open-source CNC motion platforms using GT2 belt drive systems.

📐 Technical Specifications — GT2 Timing Belt Pulley

Belt Profile GT2 (2mm pitch)
Number of Teeth 100T
Compatible Belt Width 6mm / 10mm (see variant options)
Bore Size Range 6mm – 25mm (see variant options)
Material Aluminium alloy
Finish Natural / anodized aluminium
Shaft Retention Set screw (keyway bore on selected variants)
Pitch Diameter (approx.) ~63.66mm (~2.51 in)
Outside Diameter (approx.) ~65.66mm (~2.58 in)
Hub Width See variant options
Weight See variant options

❓ Frequently Asked Questions

Which bore size should I choose for my stepper motor shaft?

Most NEMA 17 stepper motors used in 3D printers have a 5mm shaft, but this pulley starts at 6mm bore — you would need a 5-to-6mm shaft adapter or select a motor with a 6mm shaft. NEMA 23 motors commonly use 6.35mm (1/4 in) or 8mm shafts. Check your motor's datasheet for the exact shaft diameter before selecting a bore size.

What is the difference between a plain bore and a keyway bore variant?

Plain bore variants (e.g., 6mm, 8mm, 10mm) use set screws alone to grip the shaft. Keyway bore variants (e.g., 8mm 3×1.4, 10mm 4×1.8, 14mm 5×2.3, 18mm 6×2.8) include a machined keyway slot that accepts a standard key, providing significantly higher torque transmission and preventing rotational slip under heavy loads.

Is this pulley compatible with both 6mm and 10mm GT2 belts?

Yes — but you must select the correct belt-width variant at checkout. The 6mm belt width variant is designed for 6mm wide GT2 belts, and the 10mm variant for 10mm wide GT2 belts. Using a belt narrower than the pulley flange width will still work mechanically, but a belt wider than the pulley hub will not seat correctly.

How strong is an aluminium pulley compared to a steel one?

Aluminium alloy pulleys offer sufficient strength for the belt tension loads typical in 3D printers and light CNC machines. The trade-off is lower surface hardness compared to steel, so aluminium pulleys may show more wear over very long service lives under high belt tension. For most desktop 3D printer and hobby CNC applications, aluminium is the standard choice due to its lower weight and reduced rotational inertia.

Will this pulley resist corrosion in a humid workshop environment?

Aluminium alloy naturally forms a thin oxide layer that provides good corrosion resistance in typical indoor workshop conditions. Anodized variants offer additional surface protection. For environments with exposure to cutting fluids, salt air, or prolonged moisture, periodic inspection is recommended.

How do I calculate the linear speed or gear ratio using a 100-tooth GT2 pulley?

With a 2mm pitch and 100 teeth, one full revolution of this pulley moves the belt exactly 200mm (100 × 2mm). To calculate linear speed: multiply your motor RPM by 200mm. For a reduction ratio, pair this 100T pulley with a smaller drive pulley — for example, a 20T pinion gives a 5:1 reduction (100 ÷ 20). This is useful for high-torque, low-speed axis drives in CNC and automation systems.

Can I use this pulley on a Voron, RatRig, or other CoreXY printer?

A 100-tooth pulley is larger than the typical 20T drive pulleys used on CoreXY motion systems. It is more suited for idler or reduction-stage applications, or for custom belt-driven Z-axis and gantry designs where a large-diameter pulley is specified. Always verify the tooth count and belt width required by your printer's motion design before ordering.

🛒 Select your belt width and bore size above, then add to cart.

 

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