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When your motion system demands repeatable, slip-free power transfer, a mismatched or worn pulley becomes the weakest link in the chain. Engineers, makers, and CNC builders who need a reliable T5 timing belt pulley with a 5mm pitch and 11mm belt width will find this aluminium series covers the full range of common tooth counts in a single listing — from compact 10-tooth sprockets to large 60-tooth pulleys.
Each pulley is machined from aluminium alloy, delivering a lightweight yet rigid body. The T5 tooth profile (5mm pitch, ~2.06mm tooth height) mates with standard T5 timing belts. Bore options span 5mm to 24mm (0.20 in to 0.94 in), and the consistent 11mm (0.43 in) belt-contact width ensures even load distribution across the belt face. Tooth counts available: 10, 12, 14, 15, 16, 17, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40, 50, and 60 teeth.
Typical use cases include open-loop stepper-driven CNC router axes, 3D printer X/Y belt drive systems requiring a T5 aluminium timing pulley, and lightweight robotic arm joints where a low-backlash T5 drive pulley keeps positioning error minimal. The anodised aluminium construction also suits laboratory automation rigs and educational robotics platforms where corrosion resistance and low rotating mass matter.
Precision-cut T5 tooth geometry ensures positive engagement with T5 timing belts, eliminating belt slip under dynamic loads in CNC and robotics applications.
Machined from aluminium alloy for a low-mass, rigid pulley body that reduces rotational inertia — critical for high-acceleration stepper and servo drive systems.
The 11mm tooth-contact width distributes belt tension evenly, reducing edge wear and extending belt service life in continuous-duty automation rigs.
22 tooth-count options from 10 to 60 teeth let you dial in the exact gear ratio needed for your drive without custom machining or compromise.
Available bore diameters from 5mm to 24mm (including 6.35mm / ¼ in and 12.7mm / ½ in imperial sizes) cover stepper shafts, servo shafts, and standard motor outputs.
The without-step hub profile keeps the pulley compact and simplifies shaft mounting, making it easy to position the belt precisely along the shaft axis.
| Belt Type | T5 |
|---|---|
| Pitch | 5mm (0.197 in) |
| Tooth Width (Belt Contact) | 11mm (0.43 in) |
| Number of Teeth | 10, 12, 14, 15, 16, 17, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 34, 36, 38, 40, 50, 60 |
| Bore Diameter Options | 5, 6, 6.35, 8, 10, 12, 12.7, 14, 15, 16, 17, 18, 19, 20, 24 mm |
| Material | Aluminium Alloy |
| Hub Style | Without Step (Stepless) |
| Tooth Profile Standard | T5 (trapezoidal) |
| Pitch Diameter (10T) | ~15.92mm (0.627 in) |
| Pitch Diameter (20T) | ~31.83mm (1.253 in) |
| Pitch Diameter (30T) | ~47.75mm (1.880 in) |
| Pitch Diameter (60T) | ~95.49mm (3.760 in) |
| Set Screw / Keyway | See variant options |
| Surface Finish | See variant options |
The tooth count determines the pitch diameter and, combined with your motor pulley tooth count, sets the drive ratio. Divide the driven pulley teeth by the drive pulley teeth to get the reduction ratio. For example, a 20T drive pulley paired with a 40T driven pulley gives a 2:1 reduction. Use a smaller tooth count for higher speed and a larger count for more torque.
Standard NEMA 17 stepper motors have a 5mm output shaft. Select the 5mm bore option. If your motor has a D-cut shaft, ensure the pulley's set screw can engage the flat — check the variant details or contact us to confirm set screw placement.
These pulleys are designed for 11mm-wide T5 timing belts. A 10mm-wide T5 belt will fit on the same tooth profile and can run on this pulley, though the belt will sit slightly narrower than the tooth face. For best performance and belt tracking, match the belt width to the pulley tooth width as closely as possible.
Aluminium alloy pulleys offer excellent strength-to-weight ratio for most CNC, 3D printing, and light robotics applications. They handle the torque loads typical of NEMA 17 and NEMA 23 stepper motors without deformation. For very high-torque industrial drives or heavy shock loads, steel pulleys may be more appropriate. Contact us if you need guidance for your specific load case.
Aluminium alloy naturally forms a protective oxide layer that resists light moisture and humidity. For outdoor or wet environments, an anodised finish provides additional corrosion protection. If your application involves prolonged exposure to salt spray or harsh chemicals, contact us to confirm the surface finish of the specific variant you need.
Yes. T5 timing belt pulleys are widely used in 3D printer X/Y axis drives. Select the tooth count that matches your existing belt loop length and drive ratio. The 5mm bore suits most NEMA 17 motor shafts directly. Ensure your belt is a T5 profile — do not mix with GT2 or HTD belts, as the tooth profiles are not interchangeable.
Pitch diameter = (Number of Teeth × Pitch) ÷ π. For T5 (5mm pitch): a 20T pulley has a pitch diameter of ~31.83mm. Pitch diameter determines the effective radius at which belt tension acts, which affects torque output and belt speed. Use it to calculate centre-to-centre distance and required belt length for your drive layout.
