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When your CNC router, 3D printer, or automation rig demands repeatable, slip-free motion, a mismatched or worn pulley becomes the weakest link in the entire drive train. Engineers, makers, and small-batch manufacturers who need a reliable 5M synchronous timing pulley with a wide tooth-count range and flexible bore sizing will find this component a direct, drop-in solution.
Each pulley is machined from black-oxide-treated steel, offering a tooth width of 21 mm (0.83 in) and a 5 mm pitch (5M profile). Tooth counts span 10T to 60T, and bore diameters range from 5 mm to 28 mm (0.20–1.10 in), covering the most common shaft sizes used in hobbyist and light-industrial drives.
Typical applications include CNC router X/Y axis drives requiring a 5M timing pulley with a 20mm belt, 3D printer extruder and gantry systems, robotic arm joint actuators, and conveyor indexing mechanisms where a black steel synchronous pulley with a precise bore diameter is essential for shaft-to-pulley concentricity.
Available from 10T to 60T, enabling a broad selection of gear ratios for speed reduction or torque multiplication in a single product family.
Bore diameters from 5 mm to 28 mm (including 6.35 mm / ¼ in and 12.7 mm / ½ in imperial sizes) accommodate a wide range of motor and drive shafts without custom machining.
The black-oxide surface treatment provides a degree of corrosion resistance and reduces light reflection, suitable for indoor mechanical and light-duty industrial environments.
Matches standard 5M synchronous belts at 20 mm width. The 21 mm tooth width provides lateral belt retention and reduces the risk of belt walk-off under load.
Bore and tooth dimensions are machined to maintain concentricity and pitch accuracy, supporting smooth, low-vibration operation across the full tooth-count range.
Suited for CNC machines, 3D printers, laser cutters, robotic actuators, and conveyor indexing systems that use a 5M belt drive with a 20 mm belt width.
| Belt Profile | 5M (5 mm pitch) |
|---|---|
| Belt Width Compatibility | 20 mm |
| Tooth Width | 21 mm (0.83 in) |
| Tooth Count | 10T – 60T (see variant options) |
| Bore Diameter | 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 22 / 24 / 25 / 28 mm (see variant options) |
| Material | Steel with black-oxide finish |
| Outer Diameter | See variant options |
| Flange | See variant options |
| Keyway | Contact us to confirm |
| Set Screw | Contact us to confirm |
| Quantity | 1 piece per order |
The tooth count determines the pulley's pitch diameter and, when paired with a driven pulley, sets your drive ratio. Divide the driven pulley tooth count by the driving pulley tooth count to get the speed reduction ratio. For example, a 10T driver paired with a 30T driven pulley gives a 3:1 reduction. Match the tooth count to your required output speed and torque.
Measure your motor or drive shaft diameter precisely with calipers. Select the bore that matches your shaft — common sizes include 5 mm, 6 mm, 6.35 mm (¼ in), 8 mm, 10 mm, 12 mm, 12.7 mm (½ in), 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 22 mm, 24 mm, 25 mm, and 28 mm. If your shaft requires a keyway or set screw, contact us to confirm availability before ordering.
This pulley is designed for standard 5M profile (5 mm pitch) synchronous timing belts with a 20 mm width. It is not compatible with HTD 5M, T5, or other pitch profiles even if the belt width is the same. Always verify both the pitch and the belt width before purchasing.
The pulley body is machined from steel, which provides significantly higher load capacity and dimensional stability compared to aluminum or plastic alternatives. The black-oxide surface treatment adds a thin corrosion-resistant layer suitable for dry or lightly oiled indoor environments. For high-humidity or outdoor use, additional corrosion protection is recommended.
The black-oxide finish offers mild corrosion resistance suitable for typical indoor workshop conditions. It is not rated for continuous exposure to moisture, cutting fluids, or corrosive chemicals. For demanding environments, consider applying a light machine oil to the pulley surface or contact us about alternative finish options.
Yes. This 5M synchronous timing pulley is widely used in CNC router axis drives, 3D printer gantry and extruder systems, laser cutter motion stages, and robotic actuators. Confirm that your belt is a 5M profile at 20 mm width and that your shaft diameter matches one of the available bore sizes before ordering.
The 5M designation in this listing refers to a trapezoidal (classical) tooth profile with a 5 mm pitch, not the HTD (High Torque Drive) curvilinear profile. HTD 5M belts and pulleys use a rounded tooth form and are not interchangeable with trapezoidal 5M components. Check your existing belt tooth profile before ordering to ensure compatibility.
