HTD-5M 14-40T Timing Belt Pulley AF-type With Keyway CNC Drive Pulley Width 11mm

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HTD-5M 14-40T Timing Belt Pulley AF-type With Keyway CNC Drive Pulley Width 11mm

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Number of Teeth: 5M14T

Bore: 10mm

Keyway & Amount: 3x1.4mm & 1Pcs

Price:

$7.81 USD

Stock:

In stock (500 units), ready to be shipped

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HTD-5M Timing Belt Pulley AF-type — Precision CNC Drive for Robotics & Automation

When a slipping or mismatched pulley brings your CNC router, 3D printer, or automation stage to a halt, every minute of downtime costs you. Engineers and makers who demand repeatable, zero-backlash motion need a timing belt pulley that holds its bore tolerance and keyway alignment under continuous load. These HTD-5M AF-type pulleys are machined to meet that standard across a wide tooth range, so you can spec the exact reduction ratio your system requires without compromise.

Each pulley is machined from aluminum alloy with a natural anodized finish, featuring an HTD-5M tooth profile (5 mm pitch) and a fixed face width of 11 mm (0.43 in). Tooth counts span 14 T through 40 T, with bore options from 8 mm to 20 mm (0.31–0.79 in) and matching keyways ranging from 3×1.4 mm up to 6×2.8 mm depending on bore size. The AF-type flange configuration keeps the belt tracked without additional guides.

Typical use cases include CNC gantry and lead-screw drive systems requiring precise tooth engagement, lightweight robotics joints and servo-driven actuators where weight-to-stiffness ratio matters, and small-batch automation conveyor or indexing stages where consistent pitch accuracy reduces tuning time.

⚙️ Compatible with: HTD-5M open-end and closed-loop timing belts, 11 mm belt width. Pairs with standard 5M belt pulleys and tensioners.

✅ Key Features of These HTD-5M Timing Belt Pulleys

🔩AF-type Flange Design — Integrated flange on one side keeps the HTD-5M belt centered on the pulley face without additional retaining hardware.
📐Wide Tooth Range: 14 T – 40 T — Twenty tooth-count options let you dial in the exact drive ratio for your CNC, robotics, or automation application.
🕳️Multiple Bore & Keyway Options — Bore sizes from 8 mm to 20 mm with matched keyways (3×1.4 mm to 6×2.8 mm) ensure a secure, torque-transmitting fit on standard motor and shaft diameters.
🏗️Aluminum Alloy Construction — Lightweight yet rigid aluminum body reduces rotational inertia for faster acceleration in servo and stepper motor applications.
📏11 mm Fixed Belt Width — Standardized face width simplifies belt selection and ensures consistent tooth engagement across the full tooth-count range.
🔄HTD-5M Tooth Profile — Rounded HTD tooth geometry distributes belt load evenly, reducing tooth wear and extending belt service life compared to trapezoidal profiles.

📐 Technical Specifications — HTD-5M Timing Belt Pulley

Belt Profile	HTD-5M (5 mm pitch, rounded tooth)
Belt Width Compatibility	11 mm
Number of Teeth	14 T – 40 T (see variant options)
Bore Diameter	8 mm – 20 mm (see variant options)
Keyway Dimensions	3×1.4 mm / 4×1.8 mm / 5×2.3 mm / 6×2.8 mm (matched to bore)
Flange Type	AF-type (single-side flange)
Face Width	11 mm (0.43 in)
Material	Aluminum alloy
Finish	Natural anodized
Quantity per Order	1 piece
Weight	See variant options

❓ Frequently Asked Questions

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

The tooth count determines your drive ratio. Divide the driven pulley teeth by the driving pulley teeth to get the ratio. For example, a 20 T driver paired with a 40 T driven pulley gives a 2:1 reduction. Choose a tooth count that achieves your target ratio while keeping the belt wrap angle above 90° on the smaller pulley for reliable engagement.

Which bore size should I select for my motor shaft?

Match the bore to your motor or shaft diameter. Available bores are 8, 10, 12, 12.7, 14, 15, 16, 17, 18, 19, and 20 mm. The keyway is pre-cut to the standard DIN 6885 dimension for that bore size, so a standard key stock will fit without modification. If your shaft is imperial (e.g., 1/2 in = 12.7 mm), select the 12.7 mm bore variant.

What belt width is compatible with this pulley?

This pulley is designed for 11 mm wide HTD-5M timing belts. Using a narrower belt risks edge wear; a wider belt will overhang the face. Always confirm your belt width matches the 11 mm face before ordering.

Is the aluminum construction strong enough for continuous-duty automation?

Aluminum alloy pulleys are well-suited for light-to-medium duty CNC, 3D printing, and automation applications where rotational inertia and weight are concerns. For heavy industrial loads or high-shock environments, consider steel pulleys. The HTD tooth profile distributes belt tension across multiple teeth simultaneously, which reduces peak stress on any single tooth.

Will this pulley corrode in humid or outdoor environments?

The natural anodized finish provides a hard oxide layer that resists oxidation and mild corrosion in typical indoor and light-outdoor environments. For prolonged exposure to moisture, salt spray, or aggressive chemicals, apply a compatible lubricant or consider a sealed enclosure for the drive assembly.

Can I use this pulley with a trapezoidal (MXL, XL, L) timing belt?

No. This pulley is machined specifically for the HTD-5M rounded tooth profile. Trapezoidal belt profiles have a different tooth geometry and pitch, and will not mesh correctly with HTD pulleys. Always match the belt profile (HTD-5M) and pitch (5 mm) to the pulley specification.

How do I secure the pulley to the shaft after installation?

Insert a standard key (matching the keyway dimension for your bore size) into the shaft keyway and pulley keyway, then tighten the set screw(s) against the key. Ensure the shaft end is flush with or slightly recessed from the pulley face to avoid interference with the belt flange. Apply thread-locking compound to the set screw for vibration-prone applications.

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