HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm
HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm
HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm
HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm
HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm
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HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mmHTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mmHTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mmHTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mmHTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm

HTD-3M 70-150Teeth Timing Belt Pulleys Pitch 3mm With Keyway BF-type Width 16mm

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Price:
$15.76 USD
Stock:
In stock (500 units), ready to be shipped

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Description

HTD-3M Timing Belt Pulleys — Precise 3mm Pitch Drive for CNC & Automation

When your motion system demands repeatable, slip-free power transfer, a mismatched or worn pulley is the first point of failure. Engineers, CNC builders, and robotics makers who need a reliable HTD-3M timing belt pulley with a keyed bore will find this BF-type pulley a direct-fit solution across a wide range of shaft sizes and gear ratios.

Each pulley is machined from aluminum alloy, featuring an HTD (High Torque Drive) 3mm pitch tooth profile and a flanged bore (BF-type) design. Belt width is 16mm (0.63 in). Tooth counts span 70T to 150T, yielding pitch circle diameters from approximately 66.8mm (2.63 in) for 70T up to 143.2mm (5.64 in) for 150T. Bore options range from 8mm to 25mm (0.31–0.98 in), each paired with a matching DIN 6885 standard keyway to lock the pulley securely to the shaft.

Typical use cases include CNC router X/Y axis drives, 3D printer extruder and motion systems requiring HTD-3M belt pulleys with keyway, and light industrial conveyor or indexing table builds where a keyed aluminum timing pulley with 3mm pitch ensures zero-backlash positioning.

⚙️ Compatible with standard HTD-3M timing belts (3mm pitch, 15mm or 16mm width). Verify shaft diameter and keyway dimensions before ordering.

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

🔩BF-Type Flanged Bore

Double-flanged design keeps the belt tracking on the pulley face, reducing lateral drift in high-speed or long-span drive systems.

📐HTD 3mm Pitch Profile

Rounded tooth form distributes load across a larger contact area than trapezoidal profiles, supporting higher torque without tooth jump.

🔑DIN-Standard Keyway

Each bore is paired with a precision-cut keyway (3×1.4mm up to 8×3.3mm) for positive rotational locking — no set-screw slippage under load.

📏Wide Tooth & Bore Range

Nine tooth counts (70T–150T) and nine bore sizes (8–25mm) let you dial in the exact gear ratio and shaft fit without custom machining.

⚡16mm Belt Width

Matched to 16mm-wide HTD-3M belts for balanced load distribution across the full tooth face, suitable for moderate-to-high torque applications.

🏗️Aluminum Alloy Construction

Lightweight yet rigid material keeps rotational inertia low — ideal for servo and stepper motor drives where rapid acceleration matters.

📐 Technical Specifications — HTD-3M Timing Belt Pulley

Belt Profile HTD-3M (High Torque Drive)
Pitch 3mm
Belt Width 16mm (0.63 in)
Pulley Type BF-type (double-flanged bore)
Number of Teeth 70T / 72T / 75T / 80T / 90T / 100T / 120T / 140T / 150T
Pitch Circle Diameter See variant options (approx. 66.8mm–143.2mm)
Bore Diameter 8 / 10 / 12 / 14 / 15 / 17 / 19 / 20 / 25mm
Keyway Dimensions 3×1.4mm / 4×1.8mm / 5×2.3mm / 6×2.8mm / 8×3.3mm
Material Aluminum alloy
Hub Width See variant options
Quantity 1 piece per order

❓ Frequently Asked Questions

How do I choose the right number of teeth for my drive system?

The tooth count determines the pitch circle diameter (PCD) and your drive ratio. Divide the driven pulley teeth by the driver pulley teeth to get the ratio. For example, a 70T driver paired with a 140T driven pulley gives a 2:1 reduction. Use a smaller tooth count for higher speed output and a larger count for more torque.

Which bore size should I select for my motor shaft?

Measure your motor or drive shaft diameter with calipers. Available bores are 8, 10, 12, 14, 15, 17, 19, 20, and 25mm. Select the bore that matches your shaft exactly — a loose fit will cause vibration and premature wear even with a keyway installed.

What keyway size comes with each bore?

Keyway dimensions follow DIN 6885 standards and are matched to the bore: 8–10mm bore uses 3×1.4mm, 12–14mm bore uses 4×1.8mm, 15–17mm bore uses 5×2.3mm, 19–20mm bore uses 6×2.8mm, and 25mm bore uses 8×3.3mm. Confirm your shaft's existing keyway slot matches before ordering.

Is this pulley compatible with standard HTD-3M timing belts?

Yes. This pulley is designed for HTD-3M timing belts with a 3mm pitch. The 16mm belt width is compatible with 15mm and 16mm wide HTD-3M belts. Do not use with MXL, GT2, or T-profile belts — the tooth geometry is not interchangeable.

How strong is the aluminum pulley under continuous load?

Aluminum alloy pulleys are well-suited for CNC, 3D printing, and light automation loads. For continuous high-torque industrial applications (e.g., heavy conveyor drives), consider whether a steel pulley would be more appropriate. The keyed bore significantly improves torque capacity compared to set-screw-only designs.

Will this pulley corrode in humid or outdoor environments?

Aluminum alloy naturally forms a thin oxide layer that provides moderate corrosion resistance in typical indoor environments. For outdoor or high-humidity applications, applying a light coating of machine oil or anodizing the surface is recommended to extend service life.

Can I use this pulley on both the driver and driven side of a belt drive?

Yes. BF-type pulleys can be used on either side. For a speed-reduction drive, place the smaller tooth count on the motor shaft (driver) and the larger tooth count on the output shaft (driven). Both pulleys must share the same HTD-3M pitch and belt width.

🛒 Select your Number of Teeth, Bore, and Keyway size above, then add to cart.

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