Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm
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Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mmDouble U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm

Double U Grooved Pulley PU Round Belt Pulleys Aluminum Width 2mm OD 10mm-60mm

HomeDIYer
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By HomeDIYer®

Price:
$8.69 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Double U Grooved Pulley for 2mm PU Round Belts — Precise, Lightweight Aluminum Drive Component

When your DIY automation project demands a reliable, low-friction drive solution, mismatched or poorly machined pulleys are the first thing to derail your build. These double U grooved pulleys are designed for makers, hobbyists, and small workshop builders who need a consistent, repeatable belt-drive component that installs quickly and runs smoothly without constant adjustment.

Each pulley is machined from aluminum alloy, featuring a double U-groove profile sized for 2mm-wide PU (polyurethane) round belts. The outer diameter spans from 10mm to 60mm (approximately 0.39" to 2.36"), and the bore diameter ranges from 2mm to 20mm (approximately 0.08" to 0.79"), giving you the flexibility to match a wide range of shaft sizes across your build.

These pulleys are well-suited for light-duty conveyor systems in maker labs, axis-drive mechanisms in desktop CNC routers, filament-feed assemblies in 3D printers, and small robotic arm joints where a compact round-belt drive is preferred over a toothed timing belt.

⚙️ Compatibility: Designed for 2mm-wide PU round belts. Verify your shaft diameter matches the selected bore size before ordering. Not compatible with flat belts or V-belts.

✅ Key Features of These Double U Grooved Pulleys

🔩 Aluminum Alloy Construction

Machined from lightweight aluminum alloy for a favorable strength-to-weight ratio, reduced rotational inertia, and resistance to corrosion in typical indoor workshop environments.

📐 Double U-Groove Profile

The dual-groove design keeps 2mm PU round belts seated securely during operation, reducing belt wander and maintaining consistent tension across the drive path.

📏 Wide OD Range: 10mm–60mm

Available in outer diameters from 10mm to 60mm (0.39"–2.36"), allowing you to dial in the exact gear ratio or belt speed your project requires without custom machining.

🕳️ Multiple Bore Sizes: 2mm–20mm

Bore diameters from 2mm to 20mm (0.08"–0.79") accommodate a broad range of motor shafts, lead screws, and axle rods commonly found in DIY automation and robotics builds.

⚖️ Compact and Lightweight

The small form factor and aluminum material keep added mass to a minimum — an important consideration for high-speed spindles, robotic arms, and battery-powered mobile platforms.

🔄 Versatile Application Fit

Suitable for 3D printer filament drives, desktop CNC axis drives, light conveyor systems, and small robotic joints — anywhere a 2mm PU round belt drive is the right choice for your build.

📐 Technical Specifications — U Grooved Pulley

Material Aluminum Alloy
Groove Type Double U-Groove
Compatible Belt Type PU Round Belt
Belt Width 2mm
Outer Diameter (OD) 10mm / 15mm / 20mm / 25mm / 30mm / 40mm / 50mm / 60mm
Bore Diameter 2mm – 20mm (see variant options)
OD Range (Imperial) approx. 0.39" – 2.36"
Bore Range (Imperial) approx. 0.08" – 0.79"
Finish See variant options
Quantity per Order 1 piece

❓ Frequently Asked Questions

How do I choose the right OD and bore size for my project?

Start with your shaft diameter — select a bore size that matches your motor or axle shaft exactly (a snug fit is important for concentricity). Then choose the outer diameter based on the belt speed or gear ratio you need: a larger OD increases belt speed at the same RPM, while a smaller OD reduces it. Use the variant selectors above to pick your OD and bore combination.

What belt type is compatible with these pulleys?

These pulleys are designed specifically for 2mm-wide PU (polyurethane) round belts. The double U-groove profile is sized to seat a 2mm round belt securely. They are not compatible with flat belts, V-belts, or toothed timing belts.

Are these pulleys strong enough for continuous-duty use?

These aluminum pulleys are well-suited for light-to-medium duty continuous operation in applications such as 3D printer drives, small CNC axis drives, and conveyor systems. For heavy industrial loads or high-torque applications, verify that the bore-to-shaft fit is secure and that a set screw or keyway is used if needed to prevent slippage.

Do these pulleys resist corrosion?

Aluminum alloy offers good natural corrosion resistance in typical indoor workshop and lab environments. For outdoor or high-humidity applications, consider applying a light protective coating or anodizing treatment. The pulleys are not rated for submersion or highly corrosive chemical environments.

Can I use these pulleys in a 3D printer or CNC router?

Yes. These pulleys are commonly used in 3D printer filament-feed mechanisms and desktop CNC router axis drives where a compact, lightweight round-belt drive is preferred. Confirm that your belt is a 2mm PU round belt and that the bore matches your motor shaft before ordering.

How do I secure the pulley to the shaft?

The bore is machined to accept a shaft of the selected diameter. For a secure connection, use a set screw (grub screw) threaded into the hub, or apply a shaft collar alongside the pulley. If your application involves reversing loads or high torque, a keyed shaft and matching keyway bore is recommended — contact us to confirm availability for your specific size.

What is the difference between the various OD sizes in terms of belt speed?

Belt surface speed is proportional to the pulley's outer diameter and rotational speed (RPM). For example, at the same motor RPM, a 60mm OD pulley will move the belt approximately 6× faster than a 10mm OD pulley. Use the OD ratio between your drive and driven pulleys to calculate your final speed reduction or increase.

🛒 Select your OD and Bore Diameter above, then add to cart.

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