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When your motion-control build demands repeatable, slip-free power transfer, a mismatched or undersized pulley becomes the weakest link in the entire drivetrain. Engineers, makers, and small-batch manufacturers who run 5M pitch belt systems need a synchronous wheel that holds tight tolerances across every cycle — whether that is a CNC router carriage, a 3D printer extruder drive, or an industrial conveyor indexer.
These 5M timing belt pulleys are machined from aluminum alloy with a natural or anodized finish. The 5M designation indicates a 5 mm tooth pitch, and the range spans 10 to 24 teeth (5M-10T through 5M-24T), giving pitch diameters from approximately 15.9 mm (0.63 in) for the 10-tooth wheel up to approximately 38.2 mm (1.50 in) for the 24-tooth wheel. Tooth width options are 16 mm (0.63 in) and 21 mm (0.83 in), matching standard 15 mm and 20 mm wide 5M belts respectively. Bore sizes range from 5 mm to 20 mm (0.20–0.79 in) depending on the variant selected.
Typical use cases include CNC router X/Y axis drives requiring low-backlash synchronous motion, 3D printer extruder and bed-leveling belt drives where consistent tooth engagement prevents layer shift, and light industrial automation conveyors or pick-and-place systems that need indexed positioning with a 5M pitch belt.
Available in 10, 12, 14, 15, 16, 18, 19, 20, 22, and 24 teeth to cover a broad range of drive ratios and pitch diameters for 5M belt systems.
Choose 16 mm tooth width for 15 mm wide belts or 21 mm tooth width for 20 mm wide belts — both standard 5M belt widths used in CNC and automation builds.
Bore options from 5 mm to 20 mm (including 6 mm, 6.35 mm, 7 mm, 8 mm, 10 mm, 11 mm, 12 mm, 12.7 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm) accommodate most motor and shaft diameters used in maker and light industrial applications.
Machined from aluminum alloy for a balance of low rotational inertia, corrosion resistance, and dimensional stability across typical operating temperatures.
The 5M tooth profile provides positive engagement with no slip, delivering consistent indexing accuracy for CNC routers, 3D printers, and automated positioning stages.
Each variant ships as 1 piece, allowing you to order exactly the tooth count, tooth width, and bore combination your project requires without surplus stock.
| Belt Pitch | 5M (5 mm) |
|---|---|
| Tooth Count Options | 10T, 12T, 14T, 15T, 16T, 18T, 19T, 20T, 22T, 24T |
| Tooth Width | 16 mm (for 15 mm belt) / 21 mm (for 20 mm belt) |
| Compatible Belt Width | 15 mm / 20 mm |
| Bore Diameter | 5 mm – 20 mm (see variant options) |
| Pitch Diameter Range | Approx. 15.9 mm (10T) – 38.2 mm (24T) |
| Material | Aluminum alloy |
| Finish | See variant options |
| Quantity per Order | 1 piece |
| Weight | See variant options |
The tooth count determines the pitch diameter and, combined with the tooth count on the mating pulley, sets your drive ratio. For a 1:1 ratio use identical tooth counts on both pulleys. For speed reduction, use a larger tooth count on the driven pulley. Common CNC router builds use 20T pulleys paired with stepper motors for a balance of speed and torque.
The tooth width must match your belt width. The 16 mm tooth width is designed for standard 15 mm wide 5M timing belts, while the 21 mm tooth width is designed for 20 mm wide 5M timing belts. Using a pulley narrower than your belt can cause the belt to ride off the flange; using one wider than your belt wastes load capacity.
Measure your motor or drive shaft diameter precisely with calipers. Common stepper motor shaft diameters are 5 mm (NEMA 17), 6.35 mm (1/4 inch), 8 mm (NEMA 23), and 10 mm (larger NEMA 23/34). Select the bore that matches your shaft diameter exactly. If your shaft has a flat (D-cut), you will need to add a set screw or key after installation.
Yes. Aluminum alloy 5M pulleys are the industry standard for hobby and light industrial CNC routers, laser cutters, and 3D printer motion systems. The 5M pitch profile handles the belt tension and dynamic loads typical of these machines. For heavy-duty industrial conveyors with high continuous loads, consult your system's torque and tension specifications to confirm suitability.
Aluminum alloy naturally forms a thin oxide layer that provides good resistance to atmospheric corrosion in typical indoor workshop and light industrial environments. For humid or chemically aggressive environments, an anodized finish provides additional protection. These pulleys are not recommended for continuous immersion in water or exposure to strong acids or alkalis.
Yes. The 5M tooth profile is an open standard, so these pulleys are compatible with any 5M pitch timing belt from any manufacturer, provided the belt width matches the tooth width you select (15 mm belt with 16 mm tooth width, or 20 mm belt with 21 mm tooth width). Always verify the belt pitch marking before ordering.
These pulleys typically include integrated flanges on both sides of the tooth section to keep the belt tracking correctly. Please confirm the product images and variant description for the specific configuration you are ordering, as flange inclusion can vary by tooth count and width.
