Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm
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Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mmDouble V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm

Double V Grooved Pulley PU Round Belt Pulleys Aluminum Width 7mm OD 30-80mm

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Price:
$13.86 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Double V Grooved Aluminum Pulleys for PU Round Belts — Precision Motion, Zero Slip

When your CNC router, 3D printer, or light conveyor loses belt tracking, the culprit is often a pulley that was never designed for round belts. Engineers and makers who rely on PU round belt drives need a pulley with a true double-V groove profile to keep the belt centered under load. These double V grooved pulleys are machined for exactly that application, giving hobbyists and automation builders a reliable, drop-in solution.

Each pulley is machined from aluminum alloy with a 7mm groove width and a double-V cross-section optimized for standard PU round belts. Outer diameters span 30mm to 80mm (approximately 1.18 in to 3.15 in), and bore diameters range from 5mm to 25mm (approximately 0.20 in to 0.98 in) to suit a wide variety of shaft sizes. The aluminum construction keeps rotating mass low while providing adequate rigidity for light-to-medium duty cycles.

Typical use cases include desktop CNC belt-drive axes where round-belt compliance reduces backlash, small robotic arm joints requiring compact pulley geometry, and DIY conveyor systems for maker labs or light assembly lines. The double-V groove profile also suits round-belt tensioning idler applications in 3D printer extruder assemblies.

⚙️ Compatible with standard PU round belts. Verify bore diameter matches your shaft before ordering.

✅ Key Features of These Double V Grooved Aluminum Pulleys

🔩Double-V Groove Profile

Dual-angled groove walls grip PU round belts on both flanks, preventing lateral drift and maintaining belt alignment under varying loads.

🪶Aluminum Alloy Construction

Machined from aluminum alloy for a low-inertia rotating mass that responds quickly to speed changes — ideal for servo-driven and stepper-driven axes.

📐Wide OD Range: 30–80mm

Four outer diameter options (30, 40, 60, 80mm) let you tune belt speed ratios and torque multiplication without sourcing multiple product lines.

🎯Multi-Bore Compatibility

Bore diameters from 5mm to 25mm cover the most common shaft standards, reducing the need for custom adapters or bushings in most builds.

⚖️7mm Groove Width

Standardized 7mm groove width matches widely available PU round belt stock, simplifying belt sourcing and replacement in the field.

🔄Smooth Bore Finish

The bore is finished to accept a set-screw or interference-fit shaft connection; pair with a matching set-screw collar for secure axial retention.

📐 Technical Specifications — Double V Grooved Pulley

Material Aluminum Alloy
Groove Type Double V Groove
Groove Width 7mm
Belt Type PU Round Belt
Outer Diameter (OD) 30mm / 40mm / 60mm / 80mm
Bore Diameter 5mm – 25mm (see variant options)
Surface Finish See variant options
Weight See variant options
Quantity per Order 1 Pcs

❓ Frequently Asked Questions

Which PU round belt diameter fits the 7mm groove width?

The 7mm groove width is designed for PU round belts with a cross-section diameter of typically 4–6mm. A 5mm or 6mm round belt seats well in the double-V groove and provides good lateral retention. Always verify the belt diameter against the groove depth before assembly.

How do I choose the right OD for my drive ratio?

The drive ratio equals the driven pulley OD divided by the driving pulley OD. For example, pairing a 30mm drive pulley with a 60mm driven pulley gives a 2:1 reduction. Select ODs based on your required output speed and the center distance between shafts.

What bore size should I order for my shaft?

Order the bore diameter that matches your shaft diameter exactly. If your shaft is 8mm, select the 8mm bore variant. For a loose slip-fit, you may need to ream the bore slightly; for a press-fit, consult a machinist. A set-screw collar is recommended for axial retention regardless of fit type.

Is aluminum strong enough for my application?

Aluminum alloy pulleys are well-suited for light-to-medium duty belt drives, including desktop CNC machines, 3D printers, and small robotic joints. For heavy industrial conveyor loads or high-shock environments, a steel pulley may be more appropriate. Check your peak torque and belt tension against the pulley's load capacity before use.

Will these pulleys corrode in humid or outdoor environments?

Aluminum naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor environments. For outdoor or high-humidity applications, consider applying a clear anodize coating or a light machine oil film to the pulley surface to extend service life.

Can I use these as idler pulleys or tensioners?

Yes. The double-V groove profile works well as an idler or tensioner for PU round belt systems. Mount the pulley on a bearing-supported shaft or bolt it to an adjustable bracket to apply the correct belt tension. Ensure the idler bore matches your idler shaft diameter.

How do I secure the pulley to the shaft?

The most common method is a radial set-screw through the pulley hub, tightened against a flat on the shaft. Alternatively, a shaft collar with a set-screw can provide axial retention. For higher torque applications, a keyed bore and matching keyway on the shaft offer more reliable torque transmission.

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

 

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