HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore
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HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm BoreHTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore

HTD3M Timing Pulley 15-40 Teeth Synchronous Wheel 6mm Belt Width 4mm-15mm Bore

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Price:
$4.07 USD
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In stock (500 units), ready to be shipped

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Description

HTD3M Timing Pulley — Precision Synchronous Drive for 3M Belt Systems

When your motion-control build demands slip-free power transfer, a mismatched or worn pulley becomes the weakest link in the chain. Whether you are a maker building a CNC router, a robotics engineer designing a drive train, or a workshop technician replacing a worn synchronous wheel, these HTD3M timing pulleys give you the exact tooth count and bore size you need without compromise.

Each pulley is machined from aluminum alloy and features the standard HTD 3M tooth profile (3 mm pitch, ~2.39 mm tooth height). The belt-contact width is 6 mm, compatible with standard 6 mm wide HTD3M belts. Bore options span 4 mm to 25 mm, with plain-bore and keyway variants (3 mm, 4 mm, 5 mm, 6 mm, and 8 mm keyways depending on bore size). Tooth counts range from 15 to 40, giving pitch diameters of approximately 14.3 mm (15T) to 38.2 mm (40T).

Typical use cases include 3D printer extruder and axis drives requiring an HTD3M synchronous pulley replacement, DIY CNC machine X/Y/Z axis timing pulley setups, and compact robotic joint actuators where a lightweight aluminum synchronous wheel keeps inertia low.

⚙️ Compatibility: Fits standard 6 mm wide HTD 3M open-end or closed-loop belts. Verify your shaft diameter and keyway requirement before ordering.

✅ Key Features of These HTD3M Timing Pulleys

  • 🔩Wide Tooth Range — 15 to 40 teeth in a single listing; choose the ratio you need for your drive system.
  • 📐HTD 3M Tooth Profile — 3 mm pitch, rounded tooth form for smooth, low-noise belt engagement and reduced belt wear.
  • 🪛Multiple Bore Options — Plain bores from 4 mm to 25 mm; keyway bores (3 mm, 4 mm, 5 mm, 6 mm, 8 mm) for positive shaft locking.
  • ⚖️Aluminum Alloy Construction — Lightweight yet rigid; suitable for moderate-load, high-speed synchronous drive applications.
  • 🎯6 mm Belt Width — Matches standard 6 mm HTD3M belts used in 3D printers, CNC machines, and robotics platforms.
  • 🔄Keyway Variants Available — Select keyway bore options for torque-critical applications where set-screw retention alone is insufficient.

📐 Technical Specifications — HTD3M Timing Pulley

Belt Profile HTD 3M
Pitch 3 mm
Belt Width 6 mm
Teeth Number 15 – 40 (see variant options)
Bore Diameter 4 mm – 25 mm (see variant options)
Keyway Options 3 mm / 4 mm / 5 mm / 6 mm / 8 mm (select variants)
Material Aluminum alloy
Flange Integrated flanges on both sides
Pitch Diameter Range Approx. 14.3 mm (15T) – 38.2 mm (40T)
Hub Width See variant options
Finish Natural anodized / machined

❓ Frequently Asked Questions

How do I choose the right tooth count for my application?

The tooth count determines the pitch diameter and, together with your mating pulley, sets the drive ratio. Divide the driven pulley teeth by the driver pulley teeth to get the speed reduction ratio. For example, a 20T driver paired with a 40T driven pulley gives a 2:1 reduction. Match the tooth count to your required belt length and center distance as well.

Which bore size should I select?

Measure your shaft diameter precisely with calipers. Select the bore that matches your shaft — for example, choose "Bore 8mm" for an 8 mm shaft. If your application transmits significant torque, consider a keyway variant (e.g., "Bore 8 Keyway 3mm") to prevent rotational slipping under load.

What belt width is compatible with these pulleys?

These pulleys are designed for 6 mm wide HTD 3M belts. Using a wider or narrower belt will result in poor tracking and premature wear. Always confirm your belt width before ordering.

Are these pulleys strong enough for CNC and robotics use?

Yes. The aluminum alloy construction provides a good strength-to-weight ratio suitable for moderate-load synchronous drive systems such as CNC router axes, 3D printer motion systems, and robotic joint actuators. For very high-torque or heavy industrial applications, verify the load rating against your system requirements.

Do the keyway variants include a key (woodruff key)?

The keyway bore variants are machined with the keyway slot but do not include a separate key. You will need to source a standard parallel key matching the keyway dimensions (e.g., a 3×3 mm key for a 3 mm keyway) from a local hardware or fastener supplier.

How do I confirm the pulley fits my existing belt drive system?

Verify three parameters: (1) belt profile — must be HTD 3M (3 mm pitch, rounded tooth); (2) belt width — must be 6 mm; (3) bore diameter — must match your shaft. If all three match, the pulley will fit. If you are replacing an existing pulley, also confirm the tooth count matches or intentionally changes your drive ratio.

Can I use a set screw instead of a keyway to secure the pulley?

Plain-bore variants can be secured with a set screw (grub screw) tightened against the shaft. This is adequate for low-to-moderate torque applications. For higher torque or reversing loads, a keyway variant is recommended to prevent the pulley from rotating on the shaft.

🛒 Select your Teeth Number and Bore Size above, then add to cart.

 

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