HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm
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HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mmHTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm

HTD-3M 12-150T Timing Belt Pulleys Synchronous Wheel With Step Tooth Width 11mm

HomeDIYer
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By HomeDIYer®

Price:
$3.70 USD
Stock:
In stock (500 units), ready to be shipped

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Description

HTD-3M Timing Belt Pulleys — Reliable Synchronous Drive for DIY Automation

When your CNC router skips steps or your 3D printer loses position mid-print, the culprit is often a mismatched or worn timing pulley. These HTD-3M timing belt pulleys with step are engineered for makers, hobbyists, and small-workshop builders who need precise, slip-free synchronous motion without the guesswork of custom machining.

Each pulley is machined from aluminum alloy with a natural silver finish. The stepped hub design locks the pulley axially on the shaft for added stability. Tooth width is 11mm, matching standard 3M open-loop and closed-loop timing belts. Bore diameters range from 4mm to 25mm (approximately 0.16" to 0.98"), and tooth counts span 12T to 150T to cover a wide range of gear ratios and drive configurations.

Typical use cases include HTD-3M belt drive systems for CNC router X/Y axes, RepRap and cartesian 3D printer extruder drives, small robotic arm joints requiring low-backlash synchronous motion, and DIY conveyor or indexing table builds where repeatable positioning is critical.

⚙️ Compatibility: Designed for standard HTD-3M timing belts with 3mm pitch and 11mm belt width. Verify your belt pitch and width before ordering. Bore diameter must match your motor or shaft OD — select from 4mm to 25mm in the variant options above.

✅ Key Features of These HTD-3M Timing Belt Pulleys

🔩 Stepped Hub Design

The integrated step shoulder provides axial location on the shaft, reducing lateral belt drift and improving drive alignment in tight builds.

📐 Wide Tooth Count Range (12T–150T)

From compact 12-tooth drive pulleys to large 150-tooth driven wheels, a single product line covers virtually every gear ratio needed for DIY automation projects.

🎯 Multi-Bore Options (4–25mm)

Available in bore diameters from 4mm to 25mm, accommodating NEMA 17 (5mm), NEMA 23 (6.35mm), and larger stepper or servo motor shafts without adapters.

⚡ HTD Tooth Profile for Zero-Slip Drive

The HTD (High Torque Drive) curvilinear tooth profile distributes load across multiple teeth, delivering consistent torque transmission without belt slippage under dynamic loads.

🏗️ Aluminum Alloy Construction

Lightweight yet rigid aluminum alloy body keeps rotational inertia low — important for high-acceleration stepper motor applications like 3D printers and laser cutters.

🔧 Set Screw Retention

Each pulley includes a set screw bore for secure shaft locking. Pair with a flat on the motor shaft for maximum torque holding without slipping under load.

📐 Technical Specifications — HTD-3M Timing Belt Pulley

Belt Type HTD-3M (3mm pitch, curvilinear tooth)
Tooth Width 11mm (0.43")
Tooth Count (Types) 12T, 14T, 15T, 16T, 18T, 20T, 22T, 24T, 25T, 28T, 30T, 32T, 35T, 36T, 38T, 40T, 42T, 44T, 45T, 48T, 50T, 55T, 60T, 65T, 70T, 72T, 75T, 80T, 90T, 100T, 120T, 150T
Bore Diameter 4mm / 5mm / 6mm / 6.35mm / 8mm / 10mm / 12mm / 14mm / 15mm / 16mm / 17mm / 20mm / 25mm (see variant options)
Hub Style Stepped hub with set screw
Material Aluminum alloy
Finish Natural (silver anodized)
Outer Diameter See variant options
Flange See variant options
Weight See variant options
Quantity per Order 1 piece

❓ Frequently Asked Questions

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

The tooth count determines your gear ratio. Divide the driven pulley teeth by the drive pulley teeth to get the reduction ratio. For example, a 60T driven pulley paired with a 20T drive pulley gives a 3:1 reduction. For direct-drive 3D printer extruders, a single 20T–36T pulley is typical. For CNC axes, match the tooth count to your desired steps-per-mm calculation based on your stepper motor's step angle and microstepping setting.

Which bore diameter should I select for a NEMA 17 stepper motor?

Standard NEMA 17 stepper motors have a 5mm output shaft. Select the 5mm bore variant. If your motor has a D-shaft (flat on one side), pair it with the set screw for a secure, non-slip connection. NEMA 23 motors typically use a 6.35mm (1/4") shaft — select the 6.35mm bore variant for those.

What belt width is compatible with these pulleys?

These pulleys are designed for 11mm wide HTD-3M timing belts. Using a narrower belt (e.g., 6mm) will work mechanically but reduces load capacity. Using a wider belt is not recommended as it may contact the hub step. Always match belt width to pulley tooth width for optimal performance and belt life.

Are these pulleys suitable for high-speed applications?

Yes. The aluminum alloy construction keeps rotational inertia low, making these pulleys well-suited for high-acceleration stepper and servo motor applications. For very high RPM applications (above ~3,000 RPM), ensure the bore-to-shaft fit is tight and the set screw is properly torqued to prevent imbalance. The HTD tooth profile handles dynamic loads better than trapezoidal (MXL/T-type) profiles at moderate speeds.

How do I prevent the pulley from slipping on the shaft?

Tighten the set screw firmly against the motor shaft. For maximum holding torque, grind or file a small flat on the shaft at the set screw contact point before installation. This prevents the screw from riding on a curved surface and dramatically increases slip resistance. Loctite thread locker on the set screw is also recommended for vibration-prone environments.

Can I use these pulleys with GT2 or T5 belts?

No. These pulleys use the HTD-3M tooth profile, which is not interchangeable with GT2 (2mm pitch), T5 (5mm pitch), or other belt standards. The tooth geometry and pitch are specific to 3M HTD belts. Using a mismatched belt will cause skipping, accelerated wear, and potential drive failure. Always match pulley and belt by both pitch (3mm) and tooth profile (HTD).

What is the difference between standard (e.g., 3M20T) and "-B" variants (e.g., 3M20T-B)?

The "-B" suffix indicates a variant with a different hub or flange configuration — typically a wider or differently stepped hub compared to the standard version. Check the product images for your selected type to confirm the hub geometry matches your application's clearance requirements. Both variants use the same HTD-3M tooth profile and are compatible with the same 3M belts.

🛒 Select your Type (tooth count) and Bore Diameter above, then add to cart.

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