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When your motion-control build demands zero-slip power transfer, a mismatched or worn pulley becomes the weakest link in the entire drivetrain. Engineers, makers, and machine builders who rely on repeatable positioning need a 5M timing pulley that holds tolerance run after run — whether they are tuning a CoreXY 3D printer, commissioning a CNC router axis, or assembling a conveyor module.
This 5M timing pulley is machined to accept a 20mm-wide 5M synchronous belt (5 mm pitch). The toothed hub is available in 30 to 75 teeth configurations, with a tooth width of 21 mm (approximately 0.83 in) and bore options ranging from 5 mm to 28 mm (approximately 0.20 in to 1.10 in). Each pulley ships as a single unit with a set-screw bore for shaft retention.
Typical applications include 5M timing pulley for CNC router X/Y axis drives, 3D printer extruder and motion systems requiring a 20mm 5M synchronous wheel, and light industrial conveyor or indexing table builds where a synchronous gear pulley ensures accurate step-to-distance ratios.
Available from 30 T to 75 T, letting you dial in the exact gear ratio your drive system requires without custom machining.
Bore sizes from 5 mm to 28 mm (including 6.35 mm / ¼ in) cover stepper motor shafts, servo shafts, and standard metric rod stock used in CNC and robotics builds.
Matched to 20 mm wide 5M belts with a 0.5 mm flange overhang on each side to keep the belt tracking straight under load.
The 5 mm pitch tooth profile delivers positive engagement with no belt slip, maintaining accurate step-to-distance ratios in open-loop stepper and closed-loop servo systems alike.
Each pulley includes a radial set screw for secure shaft clamping, simplifying installation on smooth or flat-keyed shafts without additional hardware.
Suitable for 3D printer motion systems, CNC router axis drives, laser cutter gantries, conveyor indexing tables, and general automation where a reliable synchronous wheel gear is required.
| Belt Pitch | 5M (5 mm) |
|---|---|
| Belt Width Compatibility | 20 mm |
| Tooth Width | 21 mm (approx. 0.83 in) |
| Number of Teeth | 30 / 32 / 34 / 36 / 38 / 40 / 42 / 44 / 45 / 46 / 48 / 50 / 60 / 72 / 75 T |
| Bore Diameter | 5 / 6 / 6.35 / 8 / 10 / 12 / 12.7 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 22 / 24 / 25 / 28 mm |
| Bore Retention | Set screw (included) |
| Quantity per Order | 1 piece |
| Outer Diameter | See variant options |
| Hub Material | See variant options |
| Finish | See variant options |
The tooth count determines your drive ratio. Divide the driven pulley teeth by the driving pulley teeth to get the ratio. For example, a 30 T drive pulley paired with a 60 T driven pulley gives a 2:1 reduction. Choose a tooth count that achieves your target speed or torque ratio while keeping belt span within your frame constraints.
Standard NEMA 17 stepper motors have a 5 mm output shaft. Select the 5 mm bore option. If your motor has a flat-keyed or D-cut shaft, the set screw will engage the flat for a more secure grip. For NEMA 23 motors with an 8 mm shaft, choose the 8 mm bore.
Yes. This pulley uses the HTD 5M tooth profile (5 mm pitch, rounded tooth form), which is the standard for most 5M synchronous belts. Confirm your belt is labeled 5M or HTD-5M and is 20 mm wide to ensure proper meshing and tracking.
The set screw provides adequate retention for typical CNC, 3D printer, and light automation torque loads. For higher-torque applications, ensure the screw is tightened against a flat on the shaft (D-cut or keyway) rather than a smooth round surface. Apply thread-locking compound if vibration is a concern.
The set screw can clamp onto stainless steel shafts. For hardened shafts, ensure the set screw tip is harder than the shaft surface, or use a shaft with a machined flat to prevent the screw from slipping. Contact us to confirm material compatibility for your specific application.
The pitch diameter of a 5M pulley is calculated as: PD = (Teeth × Pitch) ÷ π. For example, a 30 T pulley has a pitch diameter of approximately 47.7 mm, and a 60 T pulley approximately 95.5 mm. The outer diameter is slightly smaller than the pitch diameter due to the tooth profile. Refer to the variant listing or contact us for exact OD values per tooth count.
Yes. The 5M pitch profile is widely used in laser cutter X/Y gantries and conveyor indexing systems where accurate positioning and moderate belt tension are required. Select a tooth count that matches your existing drive ratio, and verify the bore fits your motor or drive shaft diameter.
