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When your CNC router skips steps or your 3D printer loses position mid-print, the culprit is often a mismatched or poorly machined pulley. Engineers, makers, and automation builders who demand repeatable, slip-free motion need a pulley that holds tight tolerances across every cycle. These 5M timing belt pulleys are engineered for exactly that — delivering consistent tooth engagement and reliable torque transfer in demanding motion-control applications.
Each pulley features a machined aluminum hub body with a precisely bored center hole ranging from 5 mm (0.20 in) to 28 mm (1.10 in), and tooth counts spanning 20T to 60T. The 5M tooth profile (5 mm pitch) is designed to pair with 15 mm wide 5M synchronous belts. Flanges on both sides of the tooth face keep the belt tracking straight under load.
Typical use cases include CNC router X/Y axis drives, 3D printer extruder and motion systems, laser cutter gantry assemblies, and light-duty robotic joint actuators — anywhere a synchronous belt drive must maintain positional accuracy without backlash.
Hub bore options from 5 mm to 28 mm (0.20"–1.10") accommodate a broad range of motor and drive shaft diameters — no custom machining required for most standard shafts.
Choose from 17 tooth-count options (20T, 22T, 24T, 25T, 26T, 28T, 30T, 32T, 35T, 36T, 38T, 40T, 42T, 44T, 45T, 50T, 60T) to dial in your exact gear ratio and belt speed.
The 5M synchronous profile provides positive engagement with no slip, maintaining positional accuracy in open-loop stepper and servo-driven systems.
Integrated flanges on both sides of the tooth face prevent lateral belt walk, reducing wear and keeping your drive aligned during high-speed or reversing operation.
Machined aluminum body keeps rotating inertia low — critical for rapid direction changes in CNC and pick-and-place systems — while maintaining structural rigidity under load.
Standard 5M tooth geometry ensures interchangeability with other 5M pulleys in your system. Consistent machining tolerances support balanced multi-pulley drive trains.
| Belt Pitch | 5M (5 mm) |
|---|---|
| Compatible Belt Width | 15 mm |
| Tooth Count Options | 20T, 22T, 24T, 25T, 26T, 28T, 30T, 32T, 35T, 36T, 38T, 40T, 42T, 44T, 45T, 50T, 60T |
| Bore Diameter Range | 5 mm – 28 mm (0.20" – 1.10") |
| Material | Aluminum alloy |
| Flange | Dual-flange (both sides) |
| Outer Diameter | See variant options |
| Hub Length | See variant options |
| Finish | Natural machined aluminum |
| Set Screw | See variant options |
| Application | CNC, 3D printing, robotics, automation, laser cutters |
Tooth count determines your drive ratio and belt speed. A smaller pulley (e.g., 20T) on the motor paired with a larger pulley (e.g., 40T) on the driven shaft gives a 2:1 reduction — doubling torque and halving speed. For CNC and 3D printers where speed and resolution matter, common choices are 20T–30T on the motor side. Match your tooth count to your desired steps-per-mm or gear ratio calculation.
Measure your motor or drive shaft diameter precisely with calipers. Select the bore option that matches your shaft — for example, a NEMA 17 stepper typically has a 5 mm shaft, while larger NEMA 23 motors often use 6.35 mm (1/4") or 8 mm shafts. If your shaft diameter falls between listed bore sizes, choose the next size up and use a set screw with a flat on the shaft, or consult a machinist for a custom bore.
These pulleys are specifically designed for 15 mm wide 5M synchronous timing belts. The tooth profile (5 mm pitch) is standard 5M, so the pitch is compatible with any 5M belt, but the flange spacing and tooth face width are optimized for 15 mm belt width. Using a narrower or wider belt may result in poor tracking or reduced load capacity.
The aluminum alloy construction provides a good strength-to-weight ratio suitable for typical CNC router, 3D printer, and light robotic applications. Maximum torque capacity depends on tooth count, belt tension, and operating speed. For heavy-duty industrial applications with sustained high torque, verify load requirements against the specific tooth count and bore configuration you select. Contact us to confirm suitability for demanding use cases.
Aluminum naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor environments. For outdoor use, high-humidity workshops, or exposure to cutting fluids, consider applying a light coating of machine oil or anodizing the pulley surface. These pulleys are not rated for submersion or highly corrosive chemical environments.
Yes — the 5M tooth profile is an industry-standard geometry, so these pulleys are dimensionally interchangeable with other 5M pulleys of the same tooth count. Verify that the outer diameter, hub length, and bore size match your existing setup before ordering. If you are replacing a pulley in a tensioned system, also check that the center distance between pulleys remains within your belt's adjustment range.
The model designation indicates the belt pitch and tooth count: 5M20 = 5 mm pitch, 20 teeth; 5M60 = 5 mm pitch, 60 teeth. A 20-tooth pulley has a smaller outer diameter and is typically used on the drive (motor) side for speed reduction. A 60-tooth pulley has a larger outer diameter and is used on the driven side or where lower RPM and higher torque are needed. All models in this listing are compatible with the same 15 mm wide 5M belt.
