GT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
GT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
GT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
GT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm
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GT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mmGT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mmGT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mmGT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm

GT2 6mm Timing Belt Toothed Idler Drive Pulley 20 25 30 40 50 60T Bore 3 - 15mm

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By HomeDIYer®

Price:
$9.67 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 Timing Belt Pulley — Reliable 2GT Idler Drive for Precision Motion Systems

When your 3D printer skips steps, your CNC router loses position, or your belt-driven automation project needs a dependable idler or drive pulley, finding the right 2GT timing pulley in the exact bore and tooth count can be a frustrating search. These GT2 6mm timing belt toothed idler drive pulleys are designed for makers, engineers, and hobbyists who need a mechanically sound, drop-in solution without guesswork.

Each pulley is machined to suit standard 2GT (GT2) timing belts with a 6mm belt width. The toothed profile ensures positive engagement with the belt, eliminating slip under load. Available in tooth counts from 20T to 60T and bore diameters from 3mm (~0.12 in) to 15mm (~0.59 in), these pulleys cover a wide range of shaft sizes and gear-ratio requirements. The compact, lightweight construction suits space-constrained builds.

Typical applications include FDM 3D printer X/Y axis drives (e.g., CoreXY, Cartesian), desktop CNC router belt drives, robotic arm joint actuation, and small-format linear motion systems. Whether you need a GT2 idler pulley for belt tensioning or a drive pulley for direct motor coupling, this range covers both roles.

⚙️ Belt Compatibility: Designed for standard 2GT (GT2) timing belts with 6mm width and 2mm pitch. Verify your belt profile before ordering.

✅ Key Features of These GT2 Timing Belt Pulleys

🦷 Wide Tooth Count Range

Available from 20T to 60T, allowing flexible gear-ratio selection for speed or torque optimization in your drive system.

🔩 Multiple Bore Options

Bore sizes from 3mm to 15mm accommodate a broad range of motor shafts and idler axles — select the exact fit for your build.

📐 2GT / GT2 Profile Teeth

Toothed pulley profile matches the 2mm pitch of standard GT2 belts, providing positive, slip-free power transmission.

⚖️ Lightweight Construction

Compact form factor keeps rotating mass low — ideal for high-acceleration axes in 3D printers and CNC machines.

🔄 Dual-Role Versatility

Suitable for use as a drive pulley (motor-coupled) or idler pulley (belt tensioner), covering both functions in one product line.

🛠️ Broad Application Fit

Compatible with CoreXY, Cartesian, and delta 3D printer architectures, desktop CNC routers, robotic joints, and linear motion rigs.

📐 Technical Specifications — GT2 Timing Belt Pulley

Belt Profile 2GT (GT2)
Belt Width 6mm (0.24 in)
Belt Pitch 2mm (0.079 in)
Number of Teeth 20 / 22 / 24 / 25 / 26 / 28 / 30 / 32 / 34 / 35 / 36 / 38 / 40 / 50 / 60 (see variant options)
Bore Diameter 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 12 / 15mm (see variant options)
Tooth Width 7mm
Pulley Type Toothed (Drive / Idler)
Outer Diameter See variant options
Material See variant options
Flange See variant options
Quantity per Pack 1

❓ Frequently Asked Questions

How do I choose the right number of teeth for my build?

The tooth count determines the pulley's pitch diameter and affects your drive ratio. For 3D printer X/Y axes, 20T is the most common choice for a balance of speed and resolution. Higher tooth counts (e.g., 40T, 60T) increase belt speed per motor revolution, which suits larger-format machines or applications where speed is prioritized over resolution. Match the tooth count to your motion system's calculated steps-per-mm or gear ratio requirements.

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

Most NEMA 17 stepper motors use a 5mm shaft, making the 5mm bore the most common choice for drive pulleys. NEMA 23 motors typically use an 8mm shaft. For idler pulleys mounted on a fixed axle or bolt, match the bore to your axle or bolt diameter (e.g., M3 bolt → 3mm bore, M5 bolt → 5mm bore). Always measure your shaft or axle before ordering.

Is this pulley compatible with standard GT2 timing belts?

Yes. These pulleys are designed for standard 2GT (GT2) timing belts with a 2mm pitch and 6mm width. They are not compatible with GT3, HTD, or other belt profiles. Confirm your belt's pitch and width before purchasing to ensure a proper mesh.

Can this be used as an idler pulley without a motor shaft?

Yes. When used as an idler, the pulley is typically mounted on a bolt or axle that matches the bore diameter. For smooth idler rotation, a bearing is usually pressed into the bore or the pulley is mounted on a bearing-equipped axle. The toothed profile also works as a tensioner idler to maintain belt engagement.

How strong is this pulley under continuous load?

These pulleys are suited for the light-to-medium loads typical of 3D printers, desktop CNC routers, and small robotic systems. They are not rated for heavy industrial conveyor or high-torque power transmission applications. For demanding environments, verify the material specification of your selected variant and consult load ratings for your specific use case.

Is the pulley corrosion-resistant for outdoor or humid environments?

Corrosion resistance depends on the material of the specific variant. Aluminum pulleys offer moderate corrosion resistance suitable for indoor workshop and lab environments. For humid or outdoor conditions, consider applying a protective coating or selecting a variant with appropriate surface treatment. Contact us to confirm material details for your chosen variant.

What is the tooth width and does it match my belt?

The tooth width on these pulleys is 7mm, which is compatible with standard 6mm-wide GT2 belts (the tooth engages the belt's inner surface, and the slight overhang helps with belt tracking). Ensure your belt width is 6mm for a proper fit.

🛒 Select your Number of Teeth, Bore, and Tooth Width & Amount above, then add to cart.

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