GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter
GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter
GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter
GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter
GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter
GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter
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GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser CutterGT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser CutterGT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser CutterGT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser CutterGT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser CutterGT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter

GT2 16 Teeth 3mm/3.17/4/5/6/6.35mm Bore Pulleys For 3d printer CNC Laser Cutter

HomeDIYer
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By HomeDIYer®

Price:
$4.83 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 16-Tooth Timing Pulleys — Precise Motion Control for 3D Printers, CNC & Laser Cutters

When your 3D printer skips steps or your CNC router loses position mid-cut, the culprit is often a worn or mismatched timing pulley. Makers, hobbyists, and small-shop machinists who demand repeatable accuracy need a GT2 pulley that fits their shaft exactly and meshes cleanly with their belt — every single time.

These GT2 16-tooth timing pulleys are machined from aluminum alloy with a standard 2mm pitch GT2 tooth profile. Bore options span 3mm, 3.17mm (1/8 in), 4mm, 5mm, 6mm, and 6.35mm (1/4 in), covering the most common motor shaft diameters used in desktop motion systems. Belt width compatibility ranges from 6mm to 15mm (approximately 0.24 in to 0.59 in), with matching variants for 6mm, 9mm, 10mm, and 15mm GT2 belts.

Typical applications include Cartesian and CoreXY 3D printer X/Y axis drives, NEMA 17 stepper motor shafts on CNC routers, laser cutter gantry systems, and lightweight robotic arm joints — anywhere a GT2 16T aluminum timing pulley with a precise bore fit is required for low-backlash linear motion.

⚙️ Compatible with: GT2 2mm-pitch open or closed-loop belts  |  6 / 9 / 10 / 15mm belt widths  |  NEMA 17 & NEMA 23 stepper motor shafts  |  3D printers, CNC routers, laser cutters, and robotic actuators

✅ Key Features of These GT2 16-Tooth Timing Pulleys

  • 🎯16-Tooth GT2 Profile — Standard 2mm pitch tooth geometry ensures smooth, low-backlash engagement with GT2 open and closed-loop belts for accurate linear positioning.
  • 🔩Six Bore Sizes Available — Choose from 3mm, 3.17mm, 4mm, 5mm, 6mm, or 6.35mm to match your motor shaft without adapters or shimming.
  • 📏Four Belt Width Options — Variants for 6mm, 9mm, 10mm, and 15mm GT2 belts let you match the pulley flange to your existing belt without modification.
  • 🏗️Aluminum Alloy Construction — Lightweight yet rigid aluminum body keeps rotational inertia low while providing the dimensional stability needed for repeatable motion.
  • 🔧Set-Screw Retention — Includes a radial set screw for secure shaft clamping, preventing slippage under the rapid direction changes typical in 3D printer and CNC duty cycles.
  • 🔄Drop-In Replacement Geometry — Standard GT2 16T outer diameter and hub dimensions make these a direct swap for worn pulleys on most Ender, Voron, Prusa, and similar open-frame machines.

📐 Technical Specifications — GT2 Timing Pulley

Tooth Profile GT2 (2mm pitch)
Number of Teeth 16T
Bore Diameter 3mm / 3.17mm / 4mm / 5mm / 6mm / 6.35mm (see variant options)
Belt Width Compatibility 6mm / 9mm / 10mm / 15mm (see variant options)
Pitch Diameter Approx. 10.19mm (0.401 in)
Outside Diameter Approx. 11mm–12mm (0.43–0.47 in)
Material Aluminum alloy
Retention Method Radial set screw
Weight (per piece) See variant options
Flange Flanged (standard GT2 flange)
Finish Natural aluminum / anodized (see variant options)
Application 3D printers, CNC routers, laser cutters, robotics

❓ Frequently Asked Questions

How do I choose the right bore size for my stepper motor?

Measure your motor shaft diameter with a caliper. NEMA 17 motors most commonly use a 5mm shaft, while some use 4mm. Older or imperial-spec motors may use 3.17mm (1/8 in) or 6.35mm (1/4 in) shafts. Select the bore that matches your shaft exactly — a loose bore will cause slippage even with the set screw tightened.

Which belt width variant should I order?

Match the belt width variant to the GT2 belt already installed in your machine. The most common widths are 6mm (used on many Ender-series and Prusa printers) and 10mm (used on wider-format or higher-torque builds). The pulley flanges are sized to guide the specific belt width — mixing widths can cause belt tracking issues.

Are these pulleys compatible with closed-loop GT2 belts?

Yes. The GT2 2mm-pitch tooth profile is identical whether you are using open-loop belt stock or a closed-loop GT2 belt. Ensure the belt's inner circumference is appropriate for your axis travel distance and that the belt width matches the variant you select.

How strong is the set-screw retention? Will it slip under load?

The radial set screw provides reliable clamping for the torque levels typical of NEMA 17 and NEMA 23 stepper motors in 3D printing and light CNC use. For best results, tighten the set screw against a flat on the motor shaft if one is present, and use a small amount of thread-locking compound on the screw threads to prevent loosening from vibration.

Will aluminum pulleys corrode or wear out quickly?

Aluminum alloy offers good corrosion resistance in typical indoor workshop and desktop machine environments. The tooth surfaces will show minor wear over millions of cycles, which is normal. For high-duty-cycle industrial applications requiring maximum longevity, consider steel pulleys; for standard 3D printing and hobby CNC use, aluminum is the industry-standard choice due to its light weight and adequate durability.

Can I use these as a direct replacement for the pulleys on my Ender 3, Voron, or Prusa printer?

These GT2 16T pulleys share the standard tooth geometry and hub dimensions used across most open-frame desktop 3D printers. For Ender-series machines, select the 5mm bore / 6mm belt width variant. For Voron builds, verify your specific axis motor shaft diameter and belt width before ordering. Always confirm the bore and belt width match your machine's specifications.

How many pulleys are included per order?

Each order is for one (1) pulley unless a multi-pack quantity option is shown in the variant selector above. Select your required quantity at checkout if you need multiple pieces for a full axis rebuild or new build.

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

 

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