Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your slide gate wobbles off track or your belt-drive system loses alignment, the culprit is almost always an undersized or poorly machined pulley. Engineers, fabricators, and automation builders who need a reliable, dimensionally consistent U-groove wheel — without sourcing custom parts — will find this aluminum pulley wheel series a direct solution. Available in outer diameters from 30mm to 80mm (1.18" to 3.15"), these wheels are designed to run PU round belts in 6mm or 8mm groove widths.
Each pulley is machined from aluminum alloy, offering a lightweight yet rigid body with a smooth U-groove profile. The bore (hole size) ranges from 5mm to 15mm (0.20" to 0.59") depending on variant, and groove width is either 6mm or 8mm to match standard PU round belt diameters. The compact, single-piece construction keeps runout low and installation straightforward.
These wheels are widely used in residential and commercial slide gate systems, small CNC router belt drives, 3D printer filament guide assemblies, and light-duty conveyor or automation rigs where a U-groove pulley for round belt is required. The multi-size range lets builders standardize on one part family across different shaft diameters and load requirements.
Outer diameters from 30mm to 80mm (1.18"–3.15") and bore sizes from 5mm to 15mm cover a wide range of shaft and drive configurations in a single product family.
Machined aluminum construction keeps each wheel lightweight while maintaining the rigidity needed for consistent belt tracking and low deflection under load.
The precision-machined U-groove — available in 6mm or 8mm width — seats PU round belts securely, reducing belt slip and lateral wander in drive and guide applications.
The wheel geometry and bore options are well-suited for residential and commercial slide gate track systems, providing smooth rolling and reliable belt engagement.
Each pulley is turned to consistent dimensional tolerances, keeping runout low and ensuring repeatable fit across multiple wheels in the same build.
Beyond slide gates, these pulleys suit CNC router belt drives, 3D printer guide paths, light conveyor systems, and other automation builds requiring a U-groove round-belt pulley.
| Material | Aluminum Alloy |
|---|---|
| Outer Diameter (OD) | 30mm / 40mm / 50mm / 60mm / 80mm (1.18" / 1.57" / 1.97" / 2.36" / 3.15") |
| Bore (Hole) Size | 5mm / 6mm / 7mm / 8mm / 10mm / 12mm / 15mm — See variant options |
| Groove Width | 6mm or 8mm — See variant options |
| Compatible Belt Type | PU Round Belt (6mm or 8mm diameter) |
| Finish | Natural aluminum (uncoated) |
| Weight | See variant options |
| Item Quantity | 1 pcs per order (multi-pack options available) |
Match the OD to your drive ratio and available clearance. Smaller ODs (30–40mm) suit compact CNC or 3D printer builds with tight spacing. Larger ODs (60–80mm) are common in slide gate systems where a longer belt wrap and smoother rolling are needed. When in doubt, measure the existing pulley or calculate based on your desired belt speed and motor RPM.
Select the groove width that matches your PU round belt diameter. A 6mm groove is designed for 6mm-diameter PU round belt; an 8mm groove fits 8mm-diameter PU round belt. Using a mismatched groove width will cause the belt to seat incorrectly and may lead to slipping or premature wear.
The bore must match your shaft diameter. Measure your shaft with calipers and select the corresponding bore size (5mm, 6mm, 7mm, 8mm, 10mm, 12mm, or 15mm). If your shaft is slightly undersized, a set screw or keyway collar can compensate, but a direct bore match is recommended for best concentricity.
Aluminum has natural corrosion resistance in most outdoor environments. For coastal or high-humidity locations, periodic cleaning and light lubrication of the bore and bearing interface are recommended to extend service life. The uncoated aluminum finish will develop a natural oxide layer that provides moderate protection.
No. The U-groove profile is specifically designed for PU round belts (circular cross-section). V-belts require a V-groove pulley, and flat belts require a crowned or flat-face pulley. Using an incompatible belt type will result in poor tracking and accelerated belt wear.
The bore is machined to accept a shaft directly. For rotating applications where the pulley spins on a fixed shaft, you should add a suitable bearing or bronze bushing inside the bore. For applications where the pulley is keyed or clamped to a rotating shaft, direct mounting with a set screw collar is typical. Bearings are not included.
These pulleys are designed for light-to-medium duty applications such as slide gates, small CNC drives, and 3D printer guide systems. Exact load ratings depend on bore fit, shaft support, and belt tension. For heavy industrial conveyor or high-tension drive applications, Contact us to confirm suitability before ordering.
