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When your CNC router, automation system, or industrial drive train demands zero-slip synchronization, a mismatched or worn pulley becomes the weakest link in the entire mechanism. Engineers, makers, and machine builders who rely on HTD-8M timing belt pulleys need components that hold tight tolerances under load — and that's exactly what these BF-type drive pulleys are designed to deliver.
These HTD-8M timing belt pulleys feature an 8mm pitch HTD tooth profile machined to accept standard 8M synchronous belts. The pulley body is manufactured from aluminum alloy, with a 32mm belt width (W32) and a BF-type hub that includes a finished bore with a set-screw keyway seat for secure shaft mounting. Tooth counts range from 12T to 60T, and bore options span 8mm to 30mm (approximately 0.31" to 1.18"), covering the majority of common motor and shaft diameters used in CNC and automation applications.
Typical use cases include CNC router X/Y/Z axis drives, 3D printer extruder and gantry systems, conveyor and indexing table drives, and servo or stepper motor power transmission setups where precise belt-to-pulley engagement is critical for repeatability and positional accuracy.
| Belt Pitch | 8mm (HTD-8M profile) |
|---|---|
| Belt Width | 32mm (W32) |
| Hub Type | BF-type (finished bore with set-screw) |
| Tooth Count | 12T, 14T, 15T, 16T, 18T, 20T, 22T, 24T, 25T, 26T, 28T, 30T, 40T, 44T, 50T, 60T |
| Bore Diameter | 8mm, 10mm, 12mm, 12.7mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 22mm, 24mm, 25mm, 28mm, 30mm |
| Material | Aluminum alloy |
| Finish | Natural / anodized (see variant options) |
| Pitch Diameter (PD) | See variant options |
| Outside Diameter (OD) | See variant options |
| Flange | See variant options |
| Quantity per Order | 1 piece |
The tooth count determines the pitch diameter and, combined with your motor pulley, sets the drive ratio. Smaller tooth counts (e.g., 12T–16T) are typically used on the motor side for speed reduction, while larger counts (e.g., 30T–60T) are used on the driven side. Calculate your required ratio by dividing the driven pulley tooth count by the driver pulley tooth count.
Match the bore diameter to your motor or drive shaft diameter. Common NEMA 17 stepper motors use 5mm shafts (not listed — check smaller pulleys), NEMA 23 motors typically use 6.35mm (1/4") or 8mm shafts, and servo motors often use 10mm–19mm shafts. Always measure your shaft with calipers before ordering. The BF-type hub includes a set-screw for secure clamping.
Yes. These pulleys are machined to the HTD-8M tooth profile standard and are compatible with any standard HTD-8M synchronous timing belt with a 32mm (W32) width. Ensure your belt width matches the pulley's 32mm groove width for proper tracking and load distribution.
The BF-type hub features a finished bore with a flat (D-cut or keyway seat) and a tapped set-screw hole. When properly tightened against the shaft flat, this provides a positive mechanical lock that resists rotational slippage under normal drive loads. For very high-torque applications, consider using thread-locking compound on the set-screw.
These pulleys are machined from aluminum alloy, which offers a favorable strength-to-weight ratio and natural corrosion resistance in typical indoor environments. For outdoor or high-humidity applications, an anodized finish provides additional surface protection. Avoid prolonged exposure to strong acids or salt spray without additional protective coating.
Yes. HTD-8M pulleys are widely used in CNC router gantry drives, laser cutter axes, and larger-format 3D printer motion systems where the 8mm pitch provides higher torque capacity than smaller GT2 or HTD-3M profiles. Confirm your belt pitch, width, and shaft diameter match before ordering.
Larger tooth count pulleys (40T, 44T, 50T, 60T) have a larger pitch diameter and hub, which supports a wider range of bore sizes. However, available bore options may differ from smaller pulleys. Please check the variant selector for the specific bore sizes available for your chosen tooth count before placing your order.
