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When a slipping or misaligned pulley brings your CNC router, 3D printer, or conveyor line to a halt, the root cause is almost always an undersized or poorly toleranced drive component. Engineers, makers, and small-batch manufacturers who need a reliable 5M pitch timing belt pulley with a 15mm belt width will find this series covers the full range of common shaft sizes and tooth counts in a single, consistent product family.
Each pulley is machined from 45 carbon steel and finished with a black oxide coating. The 5M tooth profile (5 mm pitch) mates with standard 5M synchronous belts. Belt width compatibility is 15 mm. Tooth counts span 10 T through 28 T, and bore diameters range from 5 mm (approx. 0.197 in) to 25 mm (approx. 0.984 in). Optional keyway widths of 3 mm, 4 mm, 5 mm, or 6 mm are available on select bore/tooth combinations; keyway-free variants are also stocked for set-screw or press-fit installations.
Typical applications include 5M timing belt drive pulleys for CNC gantry axes, desktop 3D printer extruder drives, light-duty conveyor synchronization systems, and robotic joint actuators requiring a compact, low-backlash synchronous drive pulley with a standard 5M pitch.
Machined from 45 steel for reliable strength under cyclic belt tension loads in drive and motion-control applications.
Uniform black oxide surface treatment provides corrosion resistance and reduces light reflection in optical or precision environments.
Twelve tooth-count options let you dial in the exact speed ratio your drive system requires without custom machining.
Seventeen bore diameter options cover the most common shaft sizes used in stepper motors, servo motors, and gearbox outputs.
Select variants include a precision-cut keyway for positive torque transmission, eliminating reliance on set-screw friction alone.
Smooth-tooth 5M profile ensures zero-slip synchronous engagement with any standard 5M timing belt for accurate positioning.
| Belt Pitch | 5M (5 mm) |
|---|---|
| Belt Width Compatibility | 15 mm |
| Tooth Count | 10 T, 12 T, 14 T, 15 T, 16 T, 18 T, 20 T, 22 T, 24 T, 25 T, 26 T, 28 T |
| Bore Diameter | 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 22 / 24 / 25 mm |
| Keyway Width | Without keyway / 3 mm / 4 mm / 5 mm / 6 mm (availability varies by variant) |
| Material | 45 Carbon Steel |
| Surface Finish | Black Oxide |
| Tooth Profile | Smooth Tooth (5M synchronous) |
| Hub Width | 16 mm (nominal) |
| Weight | See variant options |
The tooth count determines the pitch diameter and, combined with the mating pulley's tooth count, sets your speed ratio. Divide the driven pulley teeth by the driver pulley teeth to get the reduction ratio. For example, a 20 T driver paired with a 10 T driven pulley gives a 2:1 speed increase. Use a smaller tooth count for higher speed output and a larger tooth count for more torque.
Match the bore diameter to your motor or shaft diameter exactly. Common stepper motor shaft sizes are 5 mm and 6.35 mm (1/4 in); servo motors often use 8 mm, 10 mm, or 12 mm shafts. Measure your shaft with calipers before ordering. If your shaft is imperial (e.g., 1/4 in = 6.35 mm), select the 6.35 mm bore option.
A keyway provides positive torque transmission and is recommended for applications with high torque, reversing loads, or where set-screw slippage is a concern. Keyway width is standardized by shaft diameter: 3 mm keyway is typical for 8 to 10 mm shafts, 4 mm for 10 to 12 mm shafts, 5 mm for 12 to 17 mm shafts, and 6 mm for 18 to 22 mm shafts. Check your shaft's keyway specification to confirm. If your shaft has no keyway, select the without keyway option and secure with a set screw.
Yes. This pulley is designed for the standard 5M synchronous belt profile (5 mm pitch) with a 15 mm belt width. It is compatible with any 5M open-ended or closed-loop timing belt of 15 mm width from any manufacturer that follows the 5M standard tooth geometry. Verify your belt's profile designation before ordering.
The nominal hub width is 16 mm. This is the axial length of the pulley body that contacts the belt. Ensure your frame, bearing block, or motor mount provides at least 16 mm of clearance along the shaft axis. For tight installations, verify total assembly length including any flanges or set-screw bosses.
Black oxide is a conversion coating that provides mild corrosion resistance in dry or low-humidity indoor environments. It is not a substitute for galvanizing or stainless steel in wet, outdoor, or chemically aggressive environments. For applications exposed to moisture, consider applying a light machine oil after installation to extend surface life.
Yes. The 5M pitch pulley is widely used in desktop CNC routers, laser cutters, and larger-format 3D printers where the GT2 2M pitch is too small for the required torque. Select the tooth count that matches your existing belt loop length and axis geometry, and choose a bore that fits your stepper or servo motor shaft.
