2GT Timing Belt Pulley 16T - 60T 2GT Transmission Belts 140-1220mm For CNC Motor

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2GT Timing Belt Pulley 16T - 60T 2GT Transmission Belts 140-1220mm For CNC Motor

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By HomeDIYer®

Product Type: 2GT Timing Belt Pulley

Product Model: 2GT - 16 Teeth, Bore 5mm

Packing Quantity: 1 Pcs

Price:

$7.93 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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2GT Timing Belt Pulley & GT2 Belt — Precision Drive Components for CNC and 3D Printer Builds

When your CNC router skips steps or your 3D printer produces layer-shift artifacts, the culprit is often a mismatched or worn drive system. Makers, hobbyists, and small-workshop engineers who demand repeatable motion need a 2GT timing belt pulley and GT2 belt combination they can rely on — without hunting across multiple suppliers for compatible parts.

This listing covers two product types in one place: 2GT Timing Belt Pulleys with tooth counts from 16T to 60T and bore diameters from 3.17 mm (~0.125 in) to 12 mm (~0.47 in), and 2GT Closed-Loop Timing Belts in circumference lengths from 140 mm (~5.5 in) to 1220 mm (~48 in). Pulleys are typically machined from aluminum alloy with a black anodized finish; belts are rubber-core with fiberglass cord reinforcement and a neoprene tooth face, 6 mm wide with a 2 mm pitch.

Typical use cases include: replacing worn drive pulleys on GT2 belt 3D printer upgrades (Ender, Voron, CoreXY platforms), building custom CNC motor timing pulley assemblies for routing and laser-cutting machines, and constructing DIY automation belt drive systems for conveyor, pick-and-place, or robotic axis projects.

⚙️ Compatibility: Designed for 2GT / GT2 belt drive systems with 2 mm pitch and 6 mm belt width. Pulleys fit standard stepper motor shafts (3.17 mm – 12 mm bore). Verify your shaft diameter and belt circumference before ordering.

✅ Key Features of These 2GT Timing Belt Pulleys and GT2 Belts

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Wide Tooth Count Range

Pulley variants span 16T, 20T, 25T, 30T, 40T, and 60T — letting you dial in the exact gear ratio your CNC or 3D printer axis requires without custom machining.

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Multiple Bore Sizes

Available bore diameters: 3.17 mm, 4 mm, 5 mm, 6 mm, 6.35 mm, 8 mm, 10 mm, and 12 mm — covering the most common stepper and servo motor shaft standards.

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Matched GT2 Belt Selection

Closed-loop 2GT belts from 140 mm to 1220 mm circumference are available in the same listing, so you can source pulley and belt together for a confirmed-compatible drive pair.

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Aluminum Pulley Construction

Pulleys are typically machined from aluminum alloy with a black anodized surface treatment for corrosion resistance and reduced weight compared to steel alternatives.

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Fiberglass-Reinforced Belt Core

GT2 belts feature a fiberglass tension cord embedded in a neoprene body, providing low stretch and consistent pitch under the dynamic loads of CNC and 3D printer motion systems.

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Standard 2 mm Pitch, 6 mm Width

Both pulleys and belts conform to the 2GT / GT2 standard (2 mm tooth pitch, 6 mm belt width), ensuring interchangeability with other GT2-spec components across your build.

📐 Technical Specifications — 2GT Timing Belt Pulley & GT2 Belt

Belt Profile	2GT (GT2)
Tooth Pitch	2 mm
Belt Width	6 mm
Pulley Tooth Count	16T / 20T / 25T / 30T / 40T / 60T (see variant options)
Pulley Bore Diameter	3.17 mm / 4 mm / 5 mm / 6 mm / 6.35 mm / 8 mm / 10 mm / 12 mm (see variant options)
Pulley Material	Aluminum alloy, black anodized finish (typical)
Belt Circumference	140 mm – 1220 mm (see variant options)
Belt Construction	Neoprene body, fiberglass tension cord
Pulley Flange	See variant options
Set Screw	See variant options
Weight (per piece)	See variant options

❓ Frequently Asked Questions

How do I choose the right tooth count for my 3D printer or CNC axis?

The tooth count determines your drive ratio. Most cartesian 3D printers (Ender-style) use 20T pulleys paired with a standard stepper motor for a balanced speed-to-torque ratio. CoreXY and larger-format machines sometimes use 16T for finer resolution or 40T+ for faster travel. Match the tooth count to your existing idler and motor pulley setup, or calculate steps-per-mm based on your stepper's microstep setting.

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

Most NEMA 17 stepper motors have a 5 mm shaft, making the 5 mm bore the most common choice for 3D printers. NEMA 23 motors typically use an 8 mm shaft. Servo motors and some CNC spindle motors may use 6 mm, 6.35 mm (1/4 inch), 10 mm, or 12 mm shafts. Measure your shaft diameter with calipers before ordering to ensure a proper fit.

Are these pulleys strong enough for CNC routing applications?

Aluminum alloy pulleys with set-screw retention are well-suited for light-to-medium CNC routing, laser cutting, and 3D printing where belt tension and cutting forces are moderate. For heavy-duty industrial routing with high lateral loads, consider whether a keyed bore or additional set screws are needed. The 2GT belt profile is designed for precision positioning rather than high-torque power transmission.

How do I select the correct belt circumference?

Measure the center-to-center distance between your two pulleys, then calculate: Belt Circumference ≈ 2 × (center distance) + π × (pulley pitch diameter). For closed-loop belts, the circumference is the total inner loop length. If you are replacing an existing belt, check the length printed on the belt itself or measure the old belt laid flat and doubled. Common 3D printer sizes include 200 mm, 280 mm, and 400 mm loops.

Are the pulleys corrosion-resistant for workshop environments?

The black anodized aluminum finish provides a layer of corrosion resistance suitable for typical indoor workshop and maker-space environments. Anodizing is not recommended for prolonged exposure to salt spray, strong acids, or caustic chemicals. For outdoor or high-humidity enclosures, consider adding a light machine oil coating to the pulley body.

Can I use these belts and pulleys together as a matched set?

Yes — both the 2GT Timing Belt Pulleys and the 2GT Closed-Loop Belts in this listing share the same 2 mm pitch and 6 mm width standard, so they are directly compatible with each other. Ordering both from this listing ensures you receive a matched GT2-spec drive pair. Always verify that your idler pulleys and tensioners are also GT2-compatible.

What is the difference between 2GT and GT2?

2GT and GT2 refer to the same belt profile standard — a 2 mm pitch curvilinear tooth geometry originally developed for precision positioning. The naming convention varies by manufacturer and region, but the tooth geometry, pitch, and width dimensions are identical. Components labeled 2GT and GT2 are interchangeable as long as the pitch (2 mm) and width (6 mm) match.

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