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When a slipping or misaligned pulley stalls your build mid-project, every minute of downtime costs you. Hobbyists, makers, and small-shop engineers who rely on belt-driven systems need a pulley that seats cleanly, holds its groove geometry under load, and doesn't demand constant re-tensioning. This aluminium V-groove pulley is machined to deliver consistent power transfer across a wide range of shaft sizes and drive configurations.
Each pulley is machined from aluminium alloy and features a single B-type V-groove profile. Outer diameters span 50 mm (≈ 1.97 in), 60 mm (≈ 2.36 in), 80 mm (≈ 3.15 in), and 100 mm (≈ 3.94 in). Bore diameters range from 8 mm to 42 mm (≈ 0.31 in – 1.65 in) depending on the selected variant, allowing fitment across a broad spectrum of shaft sizes.
Typical applications include DIY belt-drive reduction systems, CNC router and laser-cutter spindle drives, small conveyor and feeder mechanisms, and workshop machinery upgrades where a lightweight yet rigid aluminium V-groove pulley for B-type belt is required.
Machined groove geometry matches standard B-type V-belt cross-section for firm, low-slip belt seating under continuous load.
Lightweight aluminium body reduces rotational inertia compared to cast iron alternatives, improving acceleration response in variable-speed drives.
Wide outer-diameter range lets you dial in the exact speed ratio your drive system requires without custom machining.
Covers common shaft sizes from small hobby motors up to mid-size industrial shafts, reducing the need for adapter sleeves.
Machined concentricity keeps vibration low at operating speeds, protecting bearings and extending belt life in continuous-duty applications.
Standard set-screw clamp secures the pulley to the shaft without keyway machining, simplifying installation on plain round shafts.
| Groove Type | B-type V-groove (single groove) |
|---|---|
| Number of Grooves | 1 |
| Material | Aluminium alloy |
| Outer Diameter (OD) | 50 mm / 60 mm / 80 mm / 100 mm (see variant options) |
| Bore Diameter | 8 mm – 42 mm (see variant options) |
| Belt Compatibility | B-type V-belt (17 mm top width) |
| Bore Locking Method | Set screw |
| Surface Finish | See variant options |
| Weight | See variant options |
| Amount per Order | 1 Pcs |
The OD ratio between your driver and driven pulleys determines your speed reduction or increase. Divide the driven pulley OD by the driver pulley OD to get the reduction ratio. For example, a 100 mm driven pulley paired with a 50 mm driver pulley gives a 2:1 speed reduction. Select the OD combination that matches your target output RPM.
Measure your shaft diameter with a caliper and select the bore size that matches exactly. The set-screw locking method works best when the bore and shaft are the same diameter — an oversized bore will allow the pulley to wobble. Available bores range from 8 mm to 42 mm depending on the OD variant chosen.
No. This pulley is machined specifically for B-type V-belts, which have a 17 mm top width and a 40° groove angle. Using an A-type or C-type belt will result in poor seating, accelerated belt wear, and reduced power transfer efficiency. Always match the pulley groove type to your belt cross-section.
Aluminium alloy pulleys handle the torque loads typical of light-to-medium duty belt drives — such as small conveyor systems, CNC spindle drives, and workshop machinery — without deformation. For heavy-duty industrial applications with sustained high torque, verify the load rating against your system requirements or consider a cast iron alternative.
Aluminium naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor workshop conditions. It is not recommended for prolonged exposure to salt spray, acids, or highly alkaline environments. For outdoor or wet environments, consider applying a protective coating or anodized finish.
Yes. The set-screw bore locking design is intended for plain round shafts and does not require a keyway. The set screw bears directly against the shaft surface. For high-torque applications where slippage is a concern, a flat ground onto the shaft at the set-screw contact point will improve grip significantly.
At the same input RPM, a larger OD pulley produces a higher belt surface speed. A 100 mm OD pulley running at 1000 RPM generates approximately twice the belt speed of a 50 mm OD pulley at the same RPM. Use a larger OD on the driver side to increase output speed, or on the driven side to reduce it.
