HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm
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HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mmHTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm

HTD-5M 18T-45T Timing Belt Pulley With Expansion Sleeve, Pitch 5mm Width 21mm

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Price:
$22.15 USD
Stock:
In stock (500 units), ready to be shipped

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Description

HTD-5M Timing Belt Pulley with Expansion Sleeve — Precise Drive for CNC & Automation

When a slipping pulley or misaligned drive throws off your entire build, engineers and makers know the frustration of hunting for a reliable, shaft-adaptable solution. The HTD-5M timing belt pulley with expansion sleeve is designed for builders, roboticists, and machine designers who need a secure, zero-backlash connection without custom machining every shaft diameter.

Each pulley is machined from aluminum alloy with an integrated expansion sleeve (also called a locking collar or taper-lock style insert). The tooth profile follows the HTD-5M standard: 5mm pitch, 21mm belt width. Tooth counts range from 18T to 45T, and sleeve bore options span 5mm to 32mm (approximately 0.20" to 1.26"), covering the most common motor and shaft sizes used in CNC routers, 3D printers, robotic arms, and conveyor systems.

Typical use cases include HTD-5M belt drive systems for CNC axis drives, stepper and servo motor pulley replacements, DIY robotic joint actuators requiring adjustable bore sizing, and light industrial conveyor or indexing table builds where repeatable positioning is critical.

⚙️ Compatible with standard HTD-5M timing belts, 21mm belt width. Verify shaft diameter before ordering — see Sleeve Bore variant options.

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

  • 🔩 Expansion Sleeve Bore System — Taper-lock style sleeve clamps firmly onto the shaft without set screws digging in, distributing clamping force evenly for a secure, removable fit.
  • 📐 Wide Tooth Count Range (18T–45T) — Select the gear ratio that matches your drive requirements; smaller tooth counts for higher speed, larger counts for more torque.
  • 🎯 HTD-5M Standard Profile — 5mm pitch, rounded tooth form engineered for smooth, low-noise power transmission and reduced belt wear compared to trapezoidal profiles.
  • 📏 21mm Belt Width — Consistent 21mm face width across all tooth count variants ensures compatibility with standard 5M-21 timing belts without belt tracking issues.
  • 🔄 Bore Range 5mm–32mm — Covers common stepper motor shafts (5mm, 6.35mm), servo shafts (8–12mm), and larger drive shafts up to 32mm, reducing the need for shaft adapters.
  • ⚖️ Aluminum Alloy Construction — Lightweight yet rigid material keeps rotational inertia low, which is critical for responsive motion control in CNC and robotics applications.

📐 Technical Specifications — HTD-5M Timing Belt Pulley

Belt Profile HTD-5M
Pitch 5mm
Belt Width 21mm
Tooth Count 18T – 45T (see variant options)
Sleeve Bore 5mm – 32mm (see variant options)
Material Aluminum alloy
Bore Type Expansion sleeve (taper-lock style)
Outer Diameter See variant options
Surface Finish See variant options
Quantity per Order 1 piece

❓ Frequently Asked Questions

How do I choose the right tooth count (18T–45T) for my application?

The tooth count determines your drive ratio. Pair a smaller pulley on the motor shaft with a larger pulley on the driven shaft to reduce speed and increase torque, or use equal tooth counts for a 1:1 ratio. For CNC axis drives, 20T–30T on a stepper motor is a common starting point. Calculate your required linear travel per motor step to confirm the tooth count before ordering.

What sleeve bore size should I select for my motor shaft?

Match the bore to your shaft diameter. Common stepper motor shafts are 5mm or 6.35mm (1/4"). Servo motors often use 8mm, 10mm, or 12mm shafts. Larger drive shafts in conveyor or indexing applications may be 14mm–32mm. Measure your shaft with calipers before selecting — the expansion sleeve cannot be bored out after purchase.

How does the expansion sleeve work and how strong is the connection?

The expansion sleeve uses a tapered inner ring that, when tightened, expands radially to grip the shaft uniformly around its circumference. This distributes clamping force evenly, avoiding the stress concentration of a single set screw. The connection is strong enough for typical CNC and robotics torque loads and can be released and repositioned without damaging the shaft surface.

Is this pulley compatible with standard HTD-5M timing belts?

Yes. This pulley is machined to the HTD-5M standard tooth profile (5mm pitch, rounded tooth form) and is designed for use with 21mm-wide HTD-5M timing belts. Ensure your belt is labeled HTD-5M or 5M and has a 21mm width. It is not compatible with T5, GT2, or other non-HTD profiles.

Will this pulley corrode in humid or outdoor environments?

Aluminum alloy has natural oxidation resistance that forms a protective layer, making it suitable for indoor and moderately humid environments. For prolonged outdoor exposure or contact with corrosive chemicals, consider applying an anodizing treatment or protective coating. The expansion sleeve hardware (typically steel fasteners) may require periodic inspection in high-humidity settings.

Can I use this pulley on both the motor side and the driven shaft side?

Yes. The expansion sleeve design works on any round shaft within the specified bore range, whether it is a motor output shaft, a lead screw, a roller shaft, or an idler shaft. Simply select the appropriate tooth count and bore size for each position in your drive system. Many builders order two pulleys — one smaller tooth count for the motor and one larger for the driven axis.

What is the difference between this HTD-5M pulley and a standard T5 or GT2 pulley?

HTD-5M uses a rounded (curvilinear) tooth profile with a 5mm pitch, which provides better load distribution and is suited for moderate-to-high torque applications. T5 uses a trapezoidal tooth profile with a 5mm pitch — the two are not interchangeable. GT2 (Gates Tooth profile) uses a 2mm pitch and is common in 3D printers for low-torque, high-precision positioning. Choose HTD-5M when you need robust torque transmission in CNC routers, robotic joints, or conveyor drives.

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

 

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