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home > Closed Loop Timing Belt 1800–1999mm Perimeter | PU Steel Wire | 10/15/20/30mm Width > Closed Loop Timing Belt 1800–1999mm Perimeter | PU Steel Wire | 10/15/20/30mm Width

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Closed Loop Timing Belt 1800–1999mm Perimeter | PU Steel Wire | 10/15/20/30mm WidthClosed Loop Timing Belt 18001999mm Precise, Low Stretch Drive for CNC, 3D Printers & Automation When your CNC router skips steps, your 3D printer loses position, or your conveyor drifts under load, the culprit is often a belt that stretches, slips, or fails at the joint. Engineers, makers, and machine builders who need repeatable, backlash free motion rely on closed loop timing belts with a steel wire tensile core and that is exactly what this listing

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Closed Loop Timing Belt 1800–1999mm — Precise, Low-Stretch Drive for CNC, 3D Printers & Automation

When your CNC router skips steps, your 3D printer loses position, or your conveyor drifts under load, the culprit is often a belt that stretches, slips, or fails at the joint. Engineers, makers, and machine builders who need repeatable, backlash-free motion rely on closed-loop timing belts with a steel wire tensile core — and that is exactly what this listing delivers.

Each belt in this listing is a seamless closed-loop polyurethane (PU) timing belt with a built-in steel wire tensile cord. Perimeters range from 1800mm (≈70.9") to 1998mm (≈78.7") in 3mm increments, with a 3mm tooth pitch (tooth count = perimeter ÷ 3, e.g., 1800mm = 600 teeth). Width options are 10mm (≈3/8"), 15mm (≈19/32"), 20mm (≈25/32"), and 30mm (≈1-3/16"). Select your exact perimeter and width from the variant dropdowns above.

These closed-loop timing belts are well suited for CNC router X/Y/Z axes requiring low-stretch linear motion, 3D printer drive systems where positional accuracy matters, light industrial conveyor and automation equipment, and DIY robotics or motion control projects where a reliable endless drive belt is needed.

ℹ️ Compatibility Note: These are 3mm pitch closed-loop belts. Verify that your pulleys use a matching 3mm tooth pitch and compatible tooth profile (typically T3) before ordering. GT2 (2mm pitch) pulleys are not compatible. If you are unsure, contact us with your pulley specs.

✅ Key Features of These Closed Loop PU Timing Belts

🔩Built-In Steel Wire Tensile Cord — The embedded steel wire core minimizes belt elongation under load, maintaining consistent tension and positional accuracy in closed-loop timing belt drive systems.
🔄Seamless Closed-Loop Construction — No mechanical joint or clip means no weak point, no vibration spike at the seam, and smoother power transmission compared to open-end belts with fasteners.
🧪Polyurethane (PU) Belt Body — PU offers better abrasion resistance and oil tolerance than standard rubber, making these belts suitable for light industrial environments and workshop machinery.
📐3mm Tooth Pitch, Multiple Widths — Available in 10mm, 15mm, 20mm, and 30mm widths to match a range of torque and load requirements, from lightweight CNC axes to heavier conveyor drives.
📏Fine Perimeter Increments (3mm Steps) — Perimeters from 1800mm to 1998mm in 3mm steps let you find the exact belt length your machine requires without resorting to custom fabrication.
🏭Broad Application Range — Suitable for CNC routers, 3D printer drive systems, laser cutters, automation conveyors, and DIY robotics where a reliable endless timing belt is required.

📐 Technical Specifications — Closed Loop PU Timing Belt

Belt Type	Closed Loop (Endless) Timing Belt
Belt Material	Polyurethane (PU)
Tensile Cord	Built-in Steel Wire
Tooth Pitch	3mm
Tooth Profile	See variant options (typically T3-compatible — confirm with your pulley)
Perimeter Range	1800mm (≈70.9") – 1998mm (≈78.7"), in 3mm increments
Tooth Count Range	600 teeth (1800mm) – 666 teeth (1998mm)
Available Widths	10mm (≈3/8") / 15mm (≈19/32") / 20mm (≈25/32") / 30mm (≈1-3/16")
Belt Thickness	Contact us to confirm
Operating Temperature	Contact us to confirm
Color / Finish	Contact us to confirm
Sold As	1 belt per order (select perimeter and width above)
Ships From	US Warehouse

⚠️ Sizing Tip: Tooth count = Perimeter (mm) ÷ 3. Example: 1800mm ÷ 3 = 600 teeth. Always measure your existing belt or calculate from your pulley center distance before selecting a perimeter.

❓ Frequently Asked Questions

How do I choose the right perimeter length for my timing belt?

Measure the center-to-center distance between your drive and driven pulleys, then calculate the belt path length. For a two-pulley system, the formula is generally: Belt Length ≈ 2 × Center Distance + π × (D1 + D2) / 2. Available perimeters in this listing range from 1800mm (≈70.9") to 1998mm (≈78.7") in 3mm increments. When in doubt, size up slightly — a slightly longer belt is easier to tension than one that is too short.

What width should I choose — 10mm, 15mm, 20mm, or 30mm?

Width selection depends on the torque and load your application requires. Generally, 10mm is suitable for light-duty CNC and 3D printer axes; 15–20mm handles moderate loads in automation and conveyor systems; 30mm is typically used for heavier industrial drives. When in doubt, consult your machine's specification sheet or contact us to confirm.

What is the tooth pitch of these timing belts?

The tooth pitch is 3mm (1 tooth every 3mm of perimeter), which is why the tooth count equals Perimeter ÷ 3. For example, a 1800mm belt has 600 teeth. Please verify compatibility with your pulley's tooth pitch before ordering.

How strong is the steel wire core, and what loads can these belts handle?

The built-in steel wire tensile cord provides low elongation and high tensile strength compared to fiberglass or rubber belts. Exact load ratings vary by width — wider belts generally carry higher loads. For precise load capacity data for your application, please contact us with your machine specs.

Can these belts be used outdoors or in wet environments?

Polyurethane (PU) offers better resistance to oils, mild chemicals, and moisture compared to standard rubber belts. However, prolonged exposure to standing water, UV radiation, or harsh chemicals is generally not recommended. For outdoor or washdown environments, contact us to confirm suitability for your specific conditions.

Are these belts compatible with standard GT2 or T3 pulleys?

These are 3mm pitch closed-loop belts. Compatibility depends on your pulley's tooth profile and pitch. A 3mm pitch belt is typically compatible with T3-profile pulleys. GT2 pulleys use a 2mm pitch and are generally not compatible. Always verify the tooth profile and pitch of your existing pulleys before ordering.

What is the difference between a closed-loop belt and an open-end belt?

A closed-loop (endless) belt has no seam or joint — it forms a continuous loop. This eliminates the weak point of a mechanical joint and provides smoother, more consistent power transmission. Open-end belts are cut to length and joined with a clip or fastener. For precision motion applications like CNC and 3D printing, closed-loop belts are generally preferred.

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

Closed Loop Timing Belt 1800–1999mm Perimeter | PU Steel Wire | 10/15/20/30mm Width

Name: Closed Loop Timing Belt 1800–1999mm Perimeter | PU Steel Wire | 10/15/20/30mm Width
Brand: auxtoursdunmonde.com
SKU: 55007972049
Price: 22.95 USD
Availability: InStock
Rating: 4.600300000000001 (2364 reviews)