GT2 Timing Belt Pulley 16-100 Teeth 6-10mm Teeth Width Bore 3mm-25mm For 3D

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GT2 Timing Belt Pulley 16-100 Teeth 6-10mm Teeth Width Bore 3mm-25mm For 3D

Name: GT2 Timing Belt Pulley 16-100 Teeth 6-10mm Teeth Width Bore 3mm-25mm For 3D
Brand: HomeDIYer
Price: 9.22 USD
Availability: InStock

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By HomeDIYer®

Type: 2GT Without tooth

Size: 16 Tooth - Belt 6mm -Bore 3mm.

Price:

$9.22 USD

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In stock (500 units), ready to be shipped

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GT2 Timing Belt Pulley — Precision Motion Control for 3D Printers, CNC & Robotics

When your 3D printer skips steps or your CNC axis loses position, the culprit is often a worn or mismatched GT2 timing belt pulley. Makers, engineers, and workshop builders who demand repeatable, backlash-free motion need a pulley they can trust across hundreds of hours of operation. These GT2 timing belt pulleys are engineered for exactly that — delivering consistent 2mm pitch engagement whether you are running a CoreXY printer, a laser cutter gantry, or a custom automation rig.

Each pulley is machined from aluminum alloy with a hard-anodized finish for corrosion resistance and long service life. The range covers 16 to 100 teeth, belt widths of 6mm and 10mm, and bore diameters from 3mm to 25mm (approximately 0.12 in to 0.98 in). Two configurations are available: 2GT With Tooth (includes a brass insert tooth for positive belt engagement) and 2GT Without Tooth (smooth bore for idler or tensioner applications). Larger tooth counts (48T and above) are offered in Single-axis and Twin-axis hub configurations to suit different shaft and frame layouts.

Typical use cases include GT2 belt drive upgrades for Ender, Voron, and RatRig 3D printers; X/Y axis drives on desktop CNC routers; stepper motor output shafts in pick-and-place machines; and tensioner idler positions in conveyor or linear actuator systems. The wide bore selection eliminates the need for custom machining in most DIY automation projects.

✅ Compatible with standard 2GT / GT2 open-loop and closed-loop timing belts, 6mm and 10mm width. Fits NEMA 17 and NEMA 23 stepper motor shafts (bore selection required). Verify bore diameter and belt width before ordering.

✅ Key Features of These GT2 Timing Belt Pulleys

⚙️ Wide Size Range — 16 to 100 tooth counts with 6mm and 10mm belt width options cover virtually every GT2 drive application from compact 3D printer axes to larger CNC gantries.

🔩 Flexible Bore Selection — Bore diameters from 3mm to 25mm (≈ 0.12–0.98 in) accommodate NEMA 17 (5mm), NEMA 23 (6.35mm), and custom shaft sizes without additional machining.

🦷 With or Without Tooth Insert — Choose the With Tooth variant for driven pulleys requiring positive belt grip, or the Without Tooth variant for idler and tensioner positions.

🏗️ Single-axis & Twin-axis Hubs — Larger pulleys (48T+) are available in single-axis (one set screw) and twin-axis (dual set screw) hub styles to suit different shaft retention requirements.

🛡️ Aluminum Alloy Construction — Lightweight yet rigid aluminum body with anodized surface finish resists oxidation and wear, maintaining dimensional accuracy over extended use.

📐 Standard 2mm GT2 Pitch — Fully compatible with the GT2 / 2GT belt standard used across the 3D printing, CNC, and robotics industries for reliable, low-backlash power transmission.

📐 Technical Specifications — GT2 Timing Belt Pulleys

Belt Profile	GT2 / 2GT (2mm pitch)
Tooth Count Range	16T, 20T, 25T, 30T, 36T, 40T, 48T, 50T, 55T, 60T, 70T, 72T, 80T, 90T, 100T
Belt Width	6mm or 10mm (see variant options)
Bore Diameter	3mm – 25mm (see variant options)
Body Material	Aluminum alloy
Surface Finish	Anodized
Tooth Insert	Brass (With Tooth variants) / None (Without Tooth variants)
Hub Style	Single-axis or Twin-axis (48T and above)
Set Screw	See variant options
Outer Diameter	See variant options
Hub Length	See variant options
Weight	See variant options

❓ Frequently Asked Questions

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

The tooth count determines the pulley's pitch diameter and, combined with your belt length, sets the gear ratio between the motor and the driven axis. For most 3D printer X/Y drives, 20T is the standard choice. Larger tooth counts (40T–60T) are used when you need a speed reduction or when the motor shaft is positioned farther from the belt path. Match the tooth count to your existing belt loop length and frame geometry.

What is the difference between the "With Tooth" and "Without Tooth" variants?

The With Tooth variant includes a brass tooth insert that meshes directly with the GT2 belt, making it suitable for driven (motor-side) pulleys where positive torque transfer is required. The Without Tooth variant has a smooth groove profile and is intended for idler or tensioner positions where the belt simply wraps around the pulley without needing to transmit torque.

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 Bore 5mm variant for a direct fit. If your motor has a D-cut shaft, ensure the set screw on the pulley aligns with the flat. For NEMA 23 motors, the standard shaft is 6.35mm — select the Bore 6.35mm variant where available.

Are these pulleys compatible with both open-loop and closed-loop GT2 belts?

Yes. These pulleys follow the standard GT2 / 2GT 2mm pitch profile and are compatible with both open-loop (cut-to-length) and closed-loop (loop belt) GT2 timing belts in the matching width (6mm or 10mm). Ensure the belt width matches the pulley's belt width specification — a 6mm belt should not be used on a 10mm pulley groove and vice versa.

What is the difference between Single-axis and Twin-axis hub styles?

Single-axis hubs have one set screw for shaft retention, which is sufficient for most standard motor shaft applications. Twin-axis hubs feature two set screws positioned 90° apart, providing more secure clamping on smooth shafts or in high-torque applications where a single set screw may slip. Twin-axis variants are available on 48T and larger pulleys.

How do I confirm the pulley will fit my belt width before ordering?

Each variant clearly states the belt width in the Size option (e.g., "Belt 6mm" or "Belt 10mm"). Measure your existing belt width with calipers or check your printer/machine's BOM. The pulley groove width is matched to the stated belt width. Using a mismatched width will cause the belt to track off-center and may damage both the belt and the pulley flange.

Can I use these pulleys for a CoreXY or Voron 3D printer build?

Yes. These GT2 pulleys are widely used in CoreXY, Voron, RatRig, and similar open-source 3D printer builds. For driven positions, select the With Tooth variant in the tooth count specified by your printer's BOM (typically 20T for motor pulleys). For idler positions, select the Without Tooth variant. Confirm bore size matches your motor shaft and idler bolt diameter.

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

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These o rings are a great for my ear tunnels

These o rings are a great for my ear tunnels, always loosing one here and there, I always have a new ones in the drawer. Being silicone, don't have any reactions compared to standard rubber ones I purchased at hardware stores, plus much less expensive. Purchased 16mm I'd to use on 19mm tunnels, and stay on great, might be able to get away with 17mm rings, but really happy with my choice.

Will never order from these folks again

I waited a long time and that’s all I received was the eyebolt with no threaded rod attached to it

Perfect they are really made well and I used them for my car

Perfect they are really made well and I used them for my car. The only thing I had a great for us. It took three weeks to get here. So shipping was slow.

did not include wing nuts

Hi Scott, thank you for your feedback. We're sorry for any inconvenience caused. Please get in touch with us directly, and we'll assist you. Thanks for shopping with HomeDIYer!

Haven't received the order yet! It's been over

Haven't received the order yet! It's been over 19 days!

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GT2 Timing Belt Pulley 16-100 Teeth 6-10mm Teeth Width Bore 3mm-25mm For 3D

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Description

GT2 Timing Belt Pulley — Precision Motion Control for 3D Printers, CNC & Robotics

✅ Key Features of These GT2 Timing Belt Pulleys

📐 Technical Specifications — GT2 Timing Belt Pulleys

❓ Frequently Asked Questions

GT2 Timing Belt Pulley 16-100 Teeth 6-10mm Teeth Width Bore 3mm-25mm For 3D

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