HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel
HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel
HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel
HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel
HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel
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HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# SteelHTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# SteelHTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# SteelHTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# SteelHTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel

HTD-5M 16T-60T Timing Belt Pulleys Pitch 5mm AF Width 21mm With Keyway 45# Steel

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$16.47 USD
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In stock (500 units), ready to be shipped

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Description

HTD-5M Timing Belt Pulleys — Precise 5mm Pitch Drive for CNC & Automation

When a slipping or misaligned pulley derails your CNC router mid-job or throws off your robot arm's repeatability, the root cause is almost always a poorly machined bore or an inconsistent tooth profile. Engineers, makers, and machine builders who demand repeatable positioning need HTD-5M timing belt pulleys machined to tight tolerances — not generic castings that introduce backlash. These pulleys are designed for builders who refuse to compromise on motion accuracy.

Each pulley is machined from 45# medium-carbon steel, offering a tensile strength typically in the 600–800 MPa range, and features an HTD (High Torque Drive) 5mm pitch tooth profile. The AF (across-flats) belt width is 21mm, accommodating standard 5M-width synchronous belts. Bore options range from 8mm to 28mm (0.31 in to 1.10 in), with tooth counts spanning 16T to 60T, giving pitch circle diameters from approximately 25.5mm (1.00 in) for 16T up to approximately 95.5mm (3.76 in) for 60T. Each variant ships with a matching keyway and set-screw seat for positive shaft locking.

Typical use cases include CNC router X/Y axis drives requiring sub-millimeter positioning, 3D printer extruder and motion systems using HTD-5M belt loops, robotic arm joint drives where torque transmission and zero-slip engagement are critical, and custom automation conveyor or indexing systems where synchronous timing is essential.

⚙️ Compatible with: Standard HTD-5M synchronous timing belts, 21mm (AF) belt width. Verify bore diameter and keyway dimensions against your shaft spec before ordering.

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

🔩 45# Steel Construction
Machined from 45# medium-carbon steel for reliable strength and wear resistance across continuous-duty drive applications.
📐 HTD 5mm Pitch Tooth Profile
The rounded HTD tooth form distributes belt load across a larger contact area, reducing tooth shear stress versus trapezoidal profiles at equivalent torque.
🎯 Wide Tooth Count Range: 16T–60T
Sixteen tooth-count options let you dial in the exact drive ratio needed — from compact 16T sprockets for high-speed axes to large 60T pulleys for torque multiplication.
🔧 Keyway + Set-Screw Seat Included
Each pulley is machined with a standard keyway slot and set-screw seat, enabling positive shaft engagement and preventing rotational slip under load.
📏 Multiple Bore Sizes: 8mm–28mm
Bore options from 8mm to 28mm (0.31"–1.10") cover the most common motor and shaft diameters used in CNC, robotics, and automation builds.
⚖️ 21mm AF Belt Width
The 21mm across-flats belt seat width is matched to standard 5M synchronous belt widths, ensuring full tooth engagement and even load distribution across the belt face.

📐 Technical Specifications — HTD-5M Timing Belt Pulleys

Belt Type HTD (High Torque Drive)
Pitch 5mm
Belt Width (AF) 21mm (0.83 in)
Tooth Count 16T, 18T, 20T, 22T, 24T, 25T, 26T, 28T, 30T, 32T, 34T, 36T, 38T, 40T, 50T, 60T
Bore Diameter 8mm, 10mm, 12mm, 12.7mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 22mm, 24mm, 25mm, 28mm
Keyway Sizes 3×1.4mm, 4×1.8mm, 5×2.3mm, 6×2.8mm, 8×3.3mm (see variant options)
Material 45# Medium-Carbon Steel
Pitch Circle Diameter (PCD) See variant options (approx. 25.5mm for 16T to 95.5mm for 60T)
Outside Diameter See variant options
Hub Length See variant options
Surface Finish See variant options
Quantity per Order 1 piece

❓ Frequently Asked Questions

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

The tooth count determines the pitch circle diameter (PCD) and, combined with the mating pulley's tooth count, sets your drive ratio. For a 1:1 ratio use identical tooth counts on both pulleys. For speed reduction (torque increase), use a smaller driver pulley and a larger driven pulley — for example, a 20T driver paired with a 40T driven pulley gives a 2:1 reduction. Calculate center distance and belt length using standard HTD-5M belt sizing formulas once you've selected your tooth counts.

What bore size should I select for my motor shaft?

Measure your motor or drive shaft diameter precisely with calipers. Select the bore that matches your shaft diameter exactly — a loose bore will cause runout and vibration. Available bores range from 8mm to 28mm. If your shaft is imperial (e.g., 1/2" = 12.7mm), select the 12.7mm bore option where available.

What keyway size corresponds to each bore?

Keyway dimensions follow standard DIN 6885 / ISO 773 conventions and scale with bore size. As a general guide: 8mm bore → 3×1.4mm keyway; 10–12mm bore → 3×1.4mm or 4×1.8mm; 14–17mm bore → 5×2.3mm; 18–22mm bore → 6×2.8mm; 24–28mm bore → 8×3.3mm. The exact keyway for each variant is listed in the "Keyway & Amount" option selector. Always verify against your shaft's keyway spec.

Are these pulleys compatible with all HTD-5M timing belts?

Yes — these pulleys are designed for standard HTD-5M synchronous timing belts with a 5mm pitch and 21mm (AF) belt width. They are not compatible with MXL, XL, L, T5, or GT2 profile belts. Confirm your belt's pitch and width before ordering. The HTD tooth profile is a rounded arc form; do not substitute trapezoidal-profile belts.

How strong are these pulleys — can they handle high-torque applications?

45# steel has a typical tensile strength of 600–800 MPa and yield strength of approximately 355 MPa, making it suitable for moderate-to-high torque synchronous drive applications such as CNC axis drives, robotic joints, and industrial automation. For very high shock-load or continuous heavy-duty industrial use, consult a mechanical engineer to verify the selected tooth count and belt width meet your torque and safety factor requirements.

Do these pulleys require any surface treatment or lubrication?

45# steel pulleys may develop surface oxidation over time in humid environments. For indoor CNC and robotics applications, no additional treatment is typically required. If used in damp or outdoor environments, applying a light machine oil or clear lacquer to exposed surfaces is advisable. Timing belt drives are dry-running systems — do not apply grease or oil to the belt contact surfaces, as this will degrade belt performance and reduce grip.

What is the pitch circle diameter (PCD) for each tooth count?

PCD is calculated as: PCD = (Tooth Count × Pitch) ÷ π. For HTD-5M: 16T ≈ 25.5mm, 18T ≈ 28.6mm, 20T ≈ 31.8mm, 22T ≈ 35.0mm, 24T ≈ 38.2mm, 25T ≈ 39.8mm, 26T ≈ 41.4mm, 28T ≈ 44.6mm, 30T ≈ 47.7mm, 32T ≈ 50.9mm, 34T ≈ 54.1mm, 36T ≈ 57.3mm, 38T ≈ 60.5mm, 40T ≈ 63.7mm, 50T ≈ 79.6mm, 60T ≈ 95.5mm.

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

 

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