H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth
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H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 TeethH Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth

H Type Timing Belt Closed Loop — 12.7mm Pitch, 25mm & 30mm Width, 29–207 Teeth

HomeDIYer
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By HomeDIYer®

Price:
$10.28 USD
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In stock (500 units), ready to be shipped

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Description

 

H Type Closed Loop Timing Belt — Reliable 12.7mm Pitch Power Transmission

When a worn or snapped timing belt brings your conveyor, CNC router, 3D printer, or light industrial drive to a halt, finding an exact replacement fast is critical. These H type closed loop timing belts are designed for engineers, maintenance technicians, and serious DIYers who need a dependable drop-in replacement or upgrade for standard H-pitch drive systems — without waiting weeks for a custom order.

Each belt is a single closed-loop unit available in 25mm or 30mm width and a 12.7mm (1/2") pitch, spanning models from 145H (368.8mm / ≈14.5") to 1035H (2628.9mm / ≈103.5") with tooth counts ranging from 29 to 207 teeth. The trapezoidal tooth profile is constructed from neoprene rubber with fiberglass tensile cord reinforcement for dimensional stability under load.

Typical applications include CNC machine tool drives, 3D printer and laser cutter motion systems, conveyor and indexing table drives, and light industrial power transmission where precise, slip-free synchronization between shafts is required. The H-pitch standard is one of the most widely stocked profiles, making these belts a practical choice for both OEM replacement and custom drive builds.

🔗 Compatibility: Fits standard H-series (1/2" / 12.7mm pitch) pulleys and sprockets per industry trapezoidal tooth standards. Select your model number above — the perimeter and tooth count are listed for each variant.

✅ Key Features of These H Type Closed Loop Timing Belts

  • 📐 Standard H-Pitch Profile (12.7mm) — Trapezoidal tooth geometry matches H-series pulleys across major manufacturers, making these belts a direct replacement for most H-pitch closed loop timing belt drives.
  • 📏 Wide Size Range — 145H to 1035H — With over 120 model variants covering perimeters from 368.8mm (≈14.5") to 2628.9mm (≈103.5"), you can find the exact closed loop timing belt size your drive requires without custom fabrication.
  • ↔️ Two Width Options: 25mm & 30mm — Choose the belt width that matches your pulley flange. The 30mm width generally supports higher torque loads, while the 25mm width suits lighter-duty or space-constrained drives.
  • 🔩 Fiberglass Tensile Cord Reinforcement — The embedded fiberglass cord resists elongation under tension, maintaining consistent tooth pitch and preventing belt stretch that causes timing errors in synchronous drive systems.
  • ⚙️ Neoprene Rubber Construction — Neoprene offers resistance to oil mist, moderate heat, and general workshop environments, making these H timing belts suitable for typical indoor industrial and maker-space conditions.
  • 🔄 Closed Loop — No Joining Required — Each belt is a seamless closed loop, eliminating the weak point of a mechanical joint and ensuring uniform tooth engagement around the full perimeter of the drive.

📐 Technical Specifications — H Type Closed Loop Timing Belt

⚠️ Note: Perimeter and tooth count are fixed per model. Belt width (25mm or 30mm) is selectable. Verify your model number against your existing belt or pulley spec before ordering.
Belt Type H Series — Trapezoidal Tooth, Closed Loop
Pitch 12.7mm (1/2")
Available Widths 25mm (≈1.0") and 30mm (≈1.18")
Model Range 145H to 1035H
Perimeter Range 368.8mm (≈14.5") to 2628.9mm (≈103.5")
Tooth Count Range 29 Teeth to 207 Teeth
Tooth Profile Trapezoidal (standard H-series)
Belt Material Neoprene rubber with fiberglass tensile cord
Tooth Facing See variant options
Operating Temperature Contact us to confirm
Quantity per Order 1 belt per unit
Country of Origin Contact us to confirm

❓ Frequently Asked Questions

How do I choose the right H timing belt size for my machine?

Match the model number (e.g., 200H) to your existing belt or pulley specification. The number before "H" encodes the belt perimeter in tenths of an inch — for example, 200H has a perimeter of approximately 508mm (≈20.0"). You can also count the teeth on your old belt or measure the perimeter and cross-reference with the variant table. Belt width (25mm or 30mm) should match your pulley flange width. When in doubt, measure your old belt's outer perimeter and tooth count before ordering.

What does the "H" designation mean, and what pitch is it?

The "H" series is a standard trapezoidal tooth profile with a 12.7mm (1/2") pitch — the center-to-center distance between adjacent teeth. This is one of the most widely used pitches in industrial power transmission. H-series belts are compatible with H-series pulleys and sprockets from most major manufacturers that follow the standard trapezoidal tooth specification.

How do I convert the belt perimeter from mm to inches?

Divide the millimeter value by 25.4. For example: 508mm ÷ 25.4 = 20.0". The model number also encodes this directly — 200H means 200 × 0.1" = 20.0" perimeter. This makes cross-referencing with inch-based parts catalogs straightforward. All variant listings on this page show both mm and the corresponding model number for easy identification.

What load or torque can these H timing belts handle?

Load capacity depends on belt width, the number of teeth in mesh with the pulley, and operating speed. Generally, the 30mm-wide belts offer higher torque capacity than 25mm-wide belts of the same model number. For specific load ratings, consult your drive system's engineering specifications or contact us with your application details. These belts are typically suited for light-to-medium duty synchronous drives rather than heavy industrial applications.

Are these timing belts suitable for outdoor or wet environments?

These belts are typically constructed from neoprene rubber, which offers reasonable resistance to oil mist and moderate moisture exposure. However, they are generally not rated for continuous outdoor UV exposure or full immersion in water or chemicals. For harsh outdoor, high-humidity, or chemical environments, contact us to confirm material compatibility before ordering.

What pulley or sprocket standard do these belts fit?

These are standard H-series (12.7mm / 1/2" pitch) trapezoidal timing belts, compatible with H-profile pulleys and sprockets following the standard MXL/XL/L/H/XH/XXH industry tooth profile classification. They are interchangeable with H-pitch belts from major manufacturers. Always verify the tooth count and perimeter match your existing pulley before installation.

Can I use a 25mm-wide belt where a 30mm belt was originally installed?

In most cases, a narrower belt can physically run on a wider pulley, but it will typically have a lower power transmission capacity. If your application is operating near the torque limit of the original 30mm belt, substituting a 25mm belt is not recommended. Always verify the substitution against your drive system's load requirements before making the change.

How do I install a closed loop timing belt?

Closed loop timing belts require at least one pulley or tensioner to be removable or adjustable to allow the belt to be slipped over the pulleys. Loosen the tensioner or motor mount, slide the belt onto both pulleys ensuring the teeth engage correctly, then re-tension according to your drive system's specification. Do not force the belt over a pulley flange — always relieve tension first to avoid damaging the tensile cord.

🛒 Select your model and belt width above, then add to cart — ships from our US warehouse.

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