K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor
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K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step MotorK-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor

K-type GT2 6mm-10mm Timing Belt Pulley 16 20 24 25 26 Teeth for CNC Step Motor

HomeDIYer
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By HomeDIYer®

Price:
$4.66 USD
Stock:
In stock (500 units), ready to be shipped

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Description

GT2 Timing Belt Pulley — Precise Motion Control for CNC & Stepper Motor Builds

When a slipping or mismatched pulley throws off your CNC router, 3D printer, or laser engraver, every axis move becomes unreliable. Makers, engineers, and automation hobbyists who need repeatable, low-backlash motion depend on a GT2 timing belt pulley that fits their belt width and bore exactly — without having to machine a custom part.

These K-type GT2 timing belt pulleys are machined from aluminum alloy with a natural silver finish. They are available in 16, 20, 24, 25, and 26 tooth counts, compatible with both 6mm and 10mm wide GT2 belts, and offered in bore diameters ranging from 4mm to 8mm (approximately 5/32" to 5/16"). Each pulley features a set-screw bore for secure shaft clamping.

Typical use cases include GT2 belt-driven CNC router axis drives, RepRap and cartesian 3D printer X/Y motion systems, and DIY laser engraver gantry builds where consistent tooth engagement and low-backlash GT2 pulley performance are critical to cut quality and dimensional accuracy.

⚙️ Compatibility: Designed for standard GT2 (2mm pitch) open or closed-loop timing belts in 6mm or 10mm widths. Verify your shaft diameter matches the selected bore size before ordering.

✅ Key Features of These GT2 Timing Belt Pulleys

🦷 Multiple Tooth Counts

Available in 16, 20, 24, 25, and 26 teeth to match your drive ratio requirements for CNC, 3D printing, and automation projects.

📏 Dual Belt Width Support

Compatible with both 6mm and 10mm wide GT2 timing belts — select the width that matches your existing belt for a secure, rattle-free fit.

🔩 Wide Bore Range

Bore options from 4mm to 8mm (approx. 5/32" to 5/16") cover the most common stepper motor shaft diameters, including 5mm NEMA 17 and 6.35mm (1/4") shafts.

🏗️ Aluminum Alloy Construction

Machined from aluminum alloy for a lightweight yet rigid build that resists deformation under continuous belt tension in high-cycle automation applications.

🔧 Set-Screw Bore Clamping

Each pulley includes a set-screw bore for positive shaft locking, preventing rotational slip during direction reversals and rapid acceleration moves.

🔄 GT2 2mm Pitch Standard

Conforms to the GT2 (2mm pitch) tooth profile standard, ensuring consistent meshing with GT2 belts and interchangeability across common open-source motion platforms.

📐 Technical Specifications — GT2 Timing Belt Pulley

Belt Profile GT2 (2mm pitch)
Number of Teeth 16 / 20 / 24 / 25 / 26 (see variant options)
Belt Width Compatibility 6mm / 10mm (see variant options)
Bore Diameter 4mm / 5mm / 6mm / 6.35mm / 7mm / 8mm (see variant options)
Material Aluminum alloy
Finish Natural silver (uncoated)
Bore Type Set-screw clamping bore
Outer Diameter See variant options
Hub Style K-type (flanged)
Quantity per Order 1 piece

❓ Frequently Asked Questions

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

The tooth count determines your drive ratio. For 3D printers and CNC routers using NEMA 17 motors, 20 teeth is the most common choice and gives a good balance of speed and resolution. Use a higher tooth count (24–26) if you need faster travel speed, or a lower count (16) for finer resolution at the cost of top speed. Match the tooth count on both the motor pulley and idler/driven pulley to your motion system's design.

Which bore size fits a standard NEMA 17 stepper motor shaft?

Standard NEMA 17 stepper motors have a 5mm output shaft. Select the 5mm bore variant for a direct fit. If your motor has a D-cut shaft, the set-screw will lock against the flat for a secure, slip-free connection.

What is the difference between 6mm and 10mm belt width versions?

The belt width must match the pulley groove width. A 6mm belt pulley is standard for most desktop 3D printers and light CNC builds. A 10mm belt pulley is used in heavier-duty or wider-format machines where greater belt contact area and load capacity are needed. Check your existing belt width before selecting a variant.

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

Yes. These pulleys are compatible with standard GT2 2mm-pitch timing belts in both open-ended (cut-to-length) and closed-loop configurations, provided the belt width matches the pulley groove (6mm or 10mm).

Will aluminum pulleys wear out faster than steel ones?

For typical DIY CNC, 3D printing, and light automation duty cycles, aluminum pulleys offer a practical service life. Aluminum is significantly lighter than steel, which reduces rotational inertia and benefits high-acceleration stepper motor systems. In very high-load or abrasive industrial environments, steel pulleys may be preferred, but for maker and hobbyist applications aluminum is the standard choice.

Can I use a 6.35mm bore pulley on a 1/4-inch shaft?

Yes. 6.35mm is the metric equivalent of 1/4 inch (exactly 0.250"). The 6.35mm bore variant is specifically suited for imperial-sized shafts commonly found in North American CNC routers and some servo motor platforms.

How do I secure the pulley to the shaft so it does not slip?

Each pulley has a set-screw bore. Insert the shaft to the correct depth, align any D-flat or keyway if present, then tighten the set screw with an appropriate hex key (typically M3 or M4). For smooth round shafts, applying a small amount of thread-locking compound to the set screw is recommended to prevent loosening under vibration.

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

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