H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive
H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive
H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive
H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive
H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive
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H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley DriveH-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley DriveH-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley DriveH-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley DriveH-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive

H-Type Closed Loop Synchronous Timing Belt | 12.7mm Pitch | 38mm & 50mm Width | CNC Pulley Drive

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By HomeDIYer®

Price:
$14.38 USD
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In stock (500 units), ready to be shipped

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Description

 

H-Type Closed Loop Synchronous Timing Belt — Precise 12.7mm Pitch Drive for CNC & Automation

If your CNC router, laser cutter, or automated drive system keeps slipping, stretching, or losing position accuracy, the culprit is often a worn or mismatched drive belt. This H-type closed loop synchronous timing belt delivers the repeatable, slip-free motion that precision machines demand — whether you're running a gantry axis, a conveyor, or a rotary indexing system.

Each belt is a true endless loop — no seam, no splice — built around a trapezoidal H-profile tooth with a 12.7mm (1/2") pitch. Available in 38mm (≈1.5") and 50mm (≈2") widths, with circumferences ranging from 368.3mm (≈14.5") at 29 teeth up to 3225.8mm (≈127") at 254 teeth. The reinforced cord construction resists elongation under load, maintaining tooth engagement across the full belt length.

Typical applications include CNC router X/Y axis drives, 3D printer belt systems requiring H-pitch pulleys, automated pick-and-place gantries, and light industrial conveyor synchronization — anywhere a closed-loop synchronous timing belt for CNC pulley drives needs to run quietly and accurately over long duty cycles.

🔗 Compatibility: Fits standard H-series timing pulleys with 12.7mm (1/2") pitch. Match belt width (38mm or 50mm) to your pulley flange width. Verify tooth count against your center-distance calculation before ordering.

✅ Key Features of These H-Type Closed Loop Synchronous Timing Belts

  • 📐12.7mm (1/2") H-Type Pitch — Matches the industry-standard H-series pulley profile for accurate tooth meshing and synchronous motion in CNC pulley drive systems.
  • 🔄True Endless Loop Construction — No seam or mechanical joint means consistent tension distribution and eliminates the failure point common in spliced belts.
  • 📏Wide Size Range — 29 to 254 teeth (368mm to 3225mm circumference) covers short-span desktop CNC drives up to large-format gantry systems in a single product line.
  • ↔️Two Width Options — 38mm for standard-duty axes and 50mm for higher-torque closed loop synchronous belt applications where lateral stability and load capacity matter.
  • 🔩Reinforced Cord Core — Tensile cord construction resists elongation under cyclic loading, maintaining tooth pitch accuracy over extended run times.
  • 🔇Low-Noise Trapezoidal Tooth Profile — The H-profile tooth geometry engages pulleys smoothly, reducing vibration and noise compared to flat or V-belt alternatives in precision drive applications.

📐 Technical Specifications — H-Type Closed Loop Synchronous Timing Belt

Belt Type H-Type Synchronous Timing Belt (Closed Loop / Endless)
Pitch 12.7mm (1/2 inch)
Tooth Profile Trapezoidal (H-series standard)
Width Options 38mm (≈1.5") / 50mm (≈2")
Tooth Count Range 29 teeth – 254 teeth
Circumference Range 368.3mm (≈14.5") – 3225.8mm (≈127")
Construction Reinforced tensile cord, rubber/neoprene compound body
Joint Type Endless (no seam)
Compatible Pulleys H-series timing pulleys, 12.7mm pitch
Typical Applications CNC routers, laser cutters, 3D printers, automation gantries, conveyors
Size / Tooth Count See variant options
Operating Temperature Contact us to confirm
⚠️ Before ordering: Calculate your required belt circumference based on pulley center distance and diameters. Each tooth = 12.7mm of belt length. Confirm pulley flange width matches your chosen belt width (38mm or 50mm).

❓ Frequently Asked Questions

How do I choose the right belt length and tooth count?

Measure the center-to-center distance between your two pulleys, then calculate the required belt circumference: L = 2C + π(D1+D2)/2. Each tooth on an H-type belt spans 12.7mm (1/2"), so divide the circumference by 12.7 to get the tooth count. For example, a 508mm belt has 40 teeth. When in doubt, size up — a slightly longer belt is easier to tension than one that's too short.

What load or torque can these timing belts handle?

H-type synchronous belts are generally rated for moderate-to-high torque applications. The 50mm wide variants typically carry higher load capacity than the 38mm wide versions. Actual load ratings depend on pulley diameter, speed, and operating conditions. Contact us to confirm suitability for your specific application.

Can these belts be used outdoors or in wet environments?

These belts are generally suitable for indoor industrial and workshop environments. For outdoor or high-moisture applications, we recommend confirming material compatibility. The neoprene/rubber compound used in most H-type belts offers moderate resistance to oils and mild chemicals, but prolonged UV or water exposure may reduce service life.

What pulley or sprocket standard is compatible with H-type belts?

H-type belts follow the Imperial trapezoidal tooth profile standard with a 12.7mm (1/2") pitch. They are compatible with H-series timing pulleys and sprockets. Ensure your pulley groove width matches the belt width — 38mm belts require 38mm-wide pulleys, and 50mm belts require 50mm-wide pulleys.

How do I decide between 38mm and 50mm width?

Choose 38mm for lighter-duty CNC routers, plotters, and automation systems where space is limited. Choose 50mm when you need higher torque transmission, greater lateral stability, or are driving heavier loads such as large-format CNC gantries or industrial conveyor systems. Always match the belt width to your pulley flange width.

Are these closed-loop belts — do they have a seam or joint?

Yes, these are true closed-loop (endless) belts with no seam or mechanical joint. They are manufactured as a continuous loop, which provides consistent tension, smooth operation, and eliminates the weak point that spliced belts can develop over time.

What is the pitch of these timing belts and what does it mean?

The pitch is 12.7mm (1/2"), which is the distance from the center of one tooth to the center of the next. This is the defining dimension of the H-type belt standard. It must match the pitch of your timing pulley exactly for proper meshing and synchronous drive operation.

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

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