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When your motion system demands zero-slip synchronization, a mismatched or worn pulley becomes the weakest link in the chain. Engineers, makers, and 3D printer builders who need reliable, repeatable positioning rely on 5M pitch timing pulleys that hold tolerance under continuous load. This listing covers the full 5M synchronous wheel family with 20mm belt width and tooth counts from 46 to 75 teeth.
Each pulley is machined from aluminum alloy with a natural or anodized finish. The 5M tooth profile (5 mm pitch) mates with standard 5M HTD or synchronous belts. Outer diameter scales with tooth count — ranging from approximately 73 mm (≈2.87 in) for 46T up to approximately 119 mm (≈4.69 in) for 75T. Bore options span 5 mm through 28 mm, with keyway variants (3 mm, 4 mm, 5 mm, 6 mm, and 8 mm keyways) available for positive shaft engagement. Belt width accommodation is 20 mm (≈0.79 in) with flanged edges to keep the belt tracked.
Typical use cases include 5M timing pulley for 3D printer extruder drive, CNC router axis synchronous wheel replacement, and robotics joint actuator belt drive pulley — all applications where consistent tooth engagement and low backlash are non-negotiable.
5 mm tooth pitch matches standard 5M HTD and synchronous belts for accurate, slip-free power transmission.
Available in 46, 48, 50, 60, 72, and 75 teeth — select the ratio that fits your drive geometry without custom machining.
Plain bore from 5 mm to 28 mm; keyway variants (3–8 mm) available for positive shaft locking and torque transfer.
Flanged pulley body guides 20 mm wide belts and prevents lateral drift during high-speed or high-load operation.
Lightweight yet rigid aluminum body keeps rotational inertia low while maintaining dimensional stability across operating temperatures.
Standard 5M tooth form and common bore sizes make these pulleys direct replacements in 3D printers, CNC machines, and conveyor drives.
| Belt Pitch | 5M (5 mm) |
|---|---|
| Tooth Count Options | 46T, 48T, 50T, 60T, 72T, 75T |
| Belt Width | 20 mm (≈0.79 in) |
| Bore Range | 5 mm – 28 mm (≈0.20 – 1.10 in) |
| Keyway Options | 3 mm, 4 mm, 5 mm, 6 mm, 8 mm (see variant options) |
| Outer Diameter (approx.) | See variant options |
| Material | Aluminum alloy |
| Finish | See variant options |
| Flange | Yes (both sides) |
| Compatible Belt Type | 5M HTD / 5M synchronous |
| Weight | See variant options |
Tooth count determines the pulley's pitch diameter and, combined with your driven pulley's tooth count, sets the drive ratio. Measure the center distance between shafts and the belt length you have, then use a belt drive calculator to confirm the correct tooth count pairing. For 3D printer extruder drives, 46T–50T is common; larger counts suit lower-speed, higher-torque conveyor or CNC axis applications.
Measure your shaft diameter with a caliper. Order the bore that matches your shaft exactly — a plain bore should be a light interference or close sliding fit. If your shaft has a keyway, select the matching keyway variant (e.g., 10 mm bore with 3 mm keyway). Do not order a bore larger than your shaft diameter.
For light-duty or positioning applications (e.g., 3D printer axes), a plain bore secured with a set screw is typically sufficient. For higher-torque applications — such as CNC spindle drives or conveyor systems — a keyway provides positive mechanical engagement and prevents rotational slip under load. Choose the keyway variant when torque demands exceed what friction alone can handle.
Yes, provided your belt is a standard 5M pitch (5 mm tooth spacing) and 20 mm wide. These pulleys are machined to the 5M tooth profile and are compatible with both 5M HTD and standard 5M synchronous belts. Confirm your belt's pitch and width before ordering.
Aluminum alloy offers good natural oxidation resistance for indoor and light-industrial environments. For humid or chemically aggressive environments, consider applying a light machine oil or selecting an anodized variant where available. These pulleys are not rated for immersion or marine use without additional surface treatment.
Yes. The 5M timing pulley is widely used in 3D printer extruder and axis drive systems. The 46T–50T range is most common for direct-drive and Bowden extruder setups. Confirm your printer's belt pitch (5M), belt width (20 mm), and motor shaft diameter before selecting a variant.
The 72T and 75T pulleys have slightly different pitch diameters (approximately 114.6 mm vs. 119.4 mm) and are not interchangeable in a fixed-center-distance drive without adjusting belt length. The 75T provides a marginally larger diameter and is suited for applications requiring a specific gear ratio or where a slightly longer belt wrap is beneficial for load distribution.
