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home > PU Closed Loop Timing Belt with Steel Wire Core — 10/15/20/30mm Wide, 1401–1599mm Perimeter > PU Closed Loop Timing Belt with Steel Wire Core — 10/15/20/30mm Wide, 1401–1599mm Perimeter

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PU Closed Loop Timing Belt with Steel Wire Core — 10/15/20/30mm Wide, 1401–1599mm PerimeterPU Closed Loop Timing Belt with Steel Wire Core Precise, Low Stretch Drive for Automation & CNC When your 3D printer skips steps, your CNC router loses position, or your conveyor drive stretches out of spec, the culprit is almost always a worn or under spec belt. Engineers, makers, and machine builders who need repeatable, low backlash motion need a closed loop timing belt that holds tension without creeping and that's exactly what this PU timing belt

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PU Closed Loop Timing Belt with Steel Wire Core — Precise, Low-Stretch Drive for Automation & CNC

When your 3D printer skips steps, your CNC router loses position, or your conveyor drive stretches out of spec, the culprit is almost always a worn or under-spec belt. Engineers, makers, and machine builders who need repeatable, low-backlash motion need a closed loop timing belt that holds tension without creeping — and that's exactly what this PU timing belt with a built-in steel wire core is designed to do.

Each belt is a seamless closed loop manufactured from polyurethane (PU) with a steel wire tensile cord running through the body. Available in four widths — 10mm, 15mm, 20mm, and 30mm — and perimeters from 1401mm (467 teeth) through 1599mm (533 teeth) in 3mm increments. The tooth pitch is 3mm, making these belts compatible with standard metric 3mm-pitch timing pulleys. If you need a dual-dimension reference: 1401mm ≈ 55.2 in, 1500mm ≈ 59.1 in, 1599mm ≈ 63.0 in.

Typical applications include closed-loop positioning axes on desktop CNC routers, belt-driven extruder systems, light conveyor drives, automated sliding door mechanisms, and pick-and-place gantry systems where a low-stretch timing belt replacement is needed without custom fabrication.

ℹ️ Compatibility note: These belts use a 3mm tooth pitch. Verify your pulley's pitch and face width before ordering. The tooth count for each perimeter is listed in the variant name (e.g., 1401mm = 467 teeth). Width must match or be slightly narrower than your pulley's usable face width.

✅ Key Features of These PU Closed Loop Timing Belts

🔩Steel Wire Tensile Core — Fully encapsulated steel wire reinforcement resists elongation under load, maintaining consistent belt tension over time — critical for accurate positioning in CNC and 3D printing applications.
🔄Seamless Closed Loop Construction — No joint, no splice, no weak point. The endless loop design delivers uniform stiffness around the full perimeter, reducing vibration and improving drive consistency.
🧪Polyurethane Body — PU offers better abrasion resistance and oil tolerance than standard rubber timing belts, making it a practical closed loop timing belt replacement in light industrial and workshop environments.
📐3mm Tooth Pitch, Multiple Widths — Available in 10mm, 15mm, 20mm, and 30mm widths to match a wide range of pulley face widths. Wider belts generally support higher lateral loads and torque.
📏Fine Perimeter Increments — Perimeters step in 3mm increments from 1401mm to 1599mm, giving you a close match to your required center distance without custom ordering or belt splicing.
⚙️Low Backlash Tooth Profile — The molded tooth geometry engages pulley grooves with minimal play, supporting repeatable motion in automation, pick-and-place, and gantry drive systems where positional accuracy matters.

📐 Technical Specifications — PU Closed Loop Timing Belt

Belt Type	Closed Loop (Endless) Timing Belt
Material	Polyurethane (PU) with steel wire tensile cord
Tooth Pitch	3mm
Available Widths	10mm, 15mm, 20mm, 30mm
Perimeter Range	1401mm (≈55.2") — 1599mm (≈63.0")
Tooth Count Range	467 teeth (1401mm) — 533 teeth (1599mm)
Perimeter Increment	3mm per step
Tensile Element	Built-in steel wire cord (fully encapsulated)
Compatible Pulley Pitch	3mm metric timing pulleys (confirm tooth profile before ordering)
Recommended Use	Light-to-medium duty positioning, CNC, 3D printing, automation
Color / Finish	See variant options
Operating Temperature	Contact us to confirm

⚠️ Before ordering: Confirm your pulley's tooth pitch (3mm), face width, and required perimeter. Closed-loop belts must be installed by sliding over pulleys before assembly — they cannot be opened and re-joined.

❓ Frequently Asked Questions

How do I choose the right perimeter length for my machine?

Measure the center-to-center distance between your two pulleys, then calculate: Perimeter ≈ 2 × center distance + (π × pulley pitch diameter). For example, a 600mm center distance with 20mm-diameter pulleys typically requires a belt around 1240mm — always round up to the next available size. If you're replacing an existing belt, measure the old belt's outer circumference directly. The tooth count listed in each variant name (e.g., 467 teeth for 1401mm) can also help you cross-reference against your pulley's tooth count.

What load or tension can these timing belts handle?

The steel wire core generally provides tensile strength suitable for light-to-medium duty automation, 3D printing, and CNC positioning applications. Wider belts (20mm, 30mm) typically carry higher loads than narrower ones (10mm, 15mm). For heavy industrial drives or high-cycle applications, contact us to confirm suitability before ordering.

Can these belts be used outdoors or in wet environments?

PU timing belts generally offer better resistance to oils, mild chemicals, and moisture compared to rubber belts. However, prolonged outdoor UV exposure or full immersion in water is not recommended. For outdoor or wash-down environments, contact us to confirm suitability for your specific conditions.

What pulley tooth profile is compatible with this belt?

These belts use a 3mm tooth pitch. They are generally compatible with standard metric 3mm-pitch timing pulleys (such as T3 or similar profiles). Always verify the tooth pitch and tooth count of your existing pulley against the belt's tooth count listed in the variant name before ordering. If you're unsure, contact us with your pulley specs.

How do I pick the right width — 10mm, 15mm, 20mm, or 30mm?

Match the belt width to your pulley's usable face width. A belt that is too narrow may track off-center; one that is too wide won't seat properly in the pulley groove. For light-duty positioning (3D printers, small CNC routers), 10–15mm is typically sufficient. For higher torque or wider pulley systems, choose 20mm or 30mm. When in doubt, measure your existing belt's width or your pulley's face width.

What does 'closed loop' mean and why does it matter?

A closed-loop (endless) belt is manufactured as a continuous loop with no joint or splice. This eliminates the weak point of a joined belt, providing consistent tension and longer service life. It also means installation requires sliding the belt over the pulleys before final assembly — it cannot be wrapped around an assembled drive. Plan your installation sequence accordingly.

Is the steel wire core visible or exposed?

No. The steel wire reinforcement is fully encapsulated within the PU body. It is not visible or exposed under normal use, which protects it from corrosion and mechanical damage during operation.

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

PU Closed Loop Timing Belt with Steel Wire Core — 10/15/20/30mm Wide, 1401–1599mm Perimeter

Name: PU Closed Loop Timing Belt with Steel Wire Core — 10/15/20/30mm Wide, 1401–1599mm Perimeter
Brand: leseauxdelinval.fr
SKU: 11755184440
Price: 23.54 USD
Availability: InStock
Rating: 4.1368 (376 reviews)