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When a slipping or misaligned drive pulley causes positioning errors in your CNC router, 3D printer, or robotic arm, the entire build suffers. Engineers and makers who demand repeatable, zero-backlash motion need a T5 timing belt pulley they can trust across long production runs. These synchronous wheel pulleys are designed for exactly that use case, delivering consistent tooth engagement and reliable torque transfer in demanding motion-control environments.
Each pulley features a T5 tooth profile with a 5 mm (0.197 in) pitch and a 21 mm (0.827 in) tooth-contact width. The body is machined from aluminum alloy with an anodized finish for corrosion resistance and reduced rotating mass. Bore options range from 5 mm to 24 mm to suit a wide variety of motor shafts, and tooth counts span 10 T to 60 T to cover a broad range of speed-reduction ratios.
Typical applications include open-loop stepper-driven CNC gantries requiring smooth belt-driven axis motion, closed-loop servo systems in pick-and-place automation, and lightweight robotic joint drives where a compact T5 synchronous pulley minimizes inertia. The standardized T5 tooth form also makes these pulleys interchangeable with off-the-shelf T5 timing belts used in desktop laser cutters and linear actuator assemblies.
Standardized 5 mm tooth pitch ensures direct compatibility with T5 timing belts used across CNC, 3D printing, and linear-motion platforms.
Wide tooth-count selection from 10 to 60 teeth lets you dial in the exact speed ratio your drive system requires without custom machining.
Available bore diameters from 5 mm to 24 mm accommodate stepper motor shafts, servo shafts, and common imperial sizes such as 6.35 mm (1/4 in) and 12.7 mm (1/2 in).
The 21 mm belt-contact width provides a stable load-bearing surface that reduces belt edge wear and maintains alignment under lateral forces.
Lightweight aluminum construction keeps rotating inertia low while the anodized surface resists oxidation in workshop and light-industrial environments.
Positive tooth engagement eliminates the slip and backlash inherent in friction-drive systems, making these pulleys suitable for closed-loop position-control applications.
| Belt Profile | T5 |
|---|---|
| Pitch | 5 mm (0.197 in) |
| Tooth Width | 21 mm (0.827 in) |
| Tooth Count | 10 T – 60 T (see variant options) |
| Bore Diameter | 5 – 24 mm (see variant options) |
| Material | Aluminum alloy |
| Surface Finish | Anodized |
| Flange | See variant options |
| Set Screw | See variant options |
| Weight | See variant options |
The tooth count determines your drive ratio. Divide the driven pulley teeth by the driving pulley teeth to get the speed reduction ratio. For example, a 20 T driving pulley paired with a 40 T driven pulley gives a 2:1 reduction. Select a tooth count that achieves your target speed or torque ratio while keeping the belt wrap angle above 90° on the smaller pulley.
Match the bore to your motor shaft diameter. Common NEMA 17 stepper motors use a 5 mm shaft; NEMA 23 motors typically use an 8 mm or 6.35 mm shaft. Servo motors vary — check your motor datasheet. If your shaft has a keyway, confirm the pulley bore accommodates it or plan to use a set screw for fixation.
Yes. These pulleys are machined to the standard T5 tooth profile with a 5 mm pitch, making them directly compatible with any T5 open-ended or closed-loop timing belt of matching width. Confirm your belt width is 21 mm or narrower to ensure proper seating within the pulley flanges.
The anodized surface provides good resistance to oxidation and mild chemical exposure typical of workshop environments. It is suitable for indoor CNC machines, 3D printers, and light-industrial automation. For outdoor or high-humidity environments, consider applying a light lubricant to the bore and set-screw area to prevent galvanic corrosion where the pulley contacts a steel shaft.
Yes. The positive tooth engagement of the T5 profile eliminates belt slip, which is a requirement for closed-loop position control. Ensure the belt tension is set correctly — too loose causes tooth skipping, while too tight increases bearing load. Follow your servo drive manufacturer's belt-tension guidelines for best results.
The 6.35 mm bore corresponds to the imperial 1/4-inch shaft size commonly found on North American servo motors and some DC gear motors. The 6 mm bore is the metric equivalent used on most European and Asian motor designs. Measure your shaft with calipers before ordering to avoid a loose or interference fit.
These pulleys are typically secured with one or two set screws that bear against the motor shaft. For higher torque applications, use a shaft with a flat (D-cut) or keyway to prevent rotational slip. Tighten set screws to the manufacturer's recommended torque and apply thread-locking compound if vibration is present in your application.
