Open End PU Steel Wire Timing Belt — Cut-to-Length Precision for 3D Printers, CNC & Robotics
When your motion system demands consistent tooth engagement and zero-stretch performance, a flimsy rubber belt becomes the weakest link in your build. Engineers, makers, and iterative builders who run open-end PU steel wire timing belts know the difference: tighter positioning, quieter operation, and a belt that holds its length under load. Whether you're dialing in a CoreXY 3D printer, routing a CNC gantry, or assembling a custom conveyor, the right belt profile and width make every axis more predictable.
These open-end timing belts are constructed from polyurethane (PU) reinforced with steel wire tension members, available in eleven tooth profiles — 2GT, S2M, HTD-3M, S3M, HTD-5M, S5M, HTD-8M, S8M, HTD-14M, S14M, and XL — with belt widths ranging from 6 mm (0.24 in) to 40 mm (1.57 in). Each unit is sold by the meter, letting you cut exactly the length your application requires without waste.
Typical use cases include open-end PU timing belt for 3D printer X/Y axis, CNC router gantry drive belt replacement, and linear actuator belt for robotics and automation rigs. The steel wire core resists elongation under dynamic loads, making these belts a reliable choice for repetitive, high-cycle motion systems.
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Compatibility: Fits standard pulleys and idlers machined to 2GT, S2M, HTD-3M, S3M, HTD-5M, S5M, HTD-8M, S8M, HTD-14M, S14M, and XL tooth profiles. Verify pulley tooth profile and belt width before ordering. Open-end format — not a closed loop.
✅ Key Features of These Open End PU Steel Wire Timing Belts
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Steel Wire Tension Core
Embedded steel wire cords resist elongation under dynamic and sustained loads, maintaining consistent tooth pitch across the full belt length.
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Polyurethane Construction
PU body offers greater abrasion resistance and dimensional stability compared to standard neoprene rubber, extending service life in high-cycle applications.
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11 Tooth Profiles Available
Choose from 2GT, S2M, HTD-3M, S3M, HTD-5M, S5M, HTD-8M, S8M, HTD-14M, S14M, or XL to match your existing pulleys exactly.
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Sold by the Meter — Cut to Your Length
Each listing unit is 1 meter. Order the quantity you need and cut to the exact length your application requires, eliminating excess material and custom-length lead times.
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Wide Width Selection (6 mm – 40 mm)
Belt widths from 6 mm to 40 mm let you match the torque capacity and pulley width of your specific drive system without compromise.
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Black PU Finish
Uniform black polyurethane surface resists oils and light contaminants common in workshop and enclosure environments.
📐 Technical Specifications — Open End PU Timing Belt
| Belt Type |
Open End (non-closed loop) |
| Material |
Polyurethane (PU) with steel wire tension members |
| Color |
Black |
| Tooth Profiles |
2GT, S2M, HTD-3M, S3M, HTD-5M, S5M, HTD-8M, S8M, HTD-14M, S14M, XL |
| Pitch (by profile) |
2GT / S2M: 2 mm · HTD-3M / S3M: 3 mm · HTD-5M / S5M: 5 mm · HTD-8M / S8M: 8 mm · HTD-14M / S14M: 14 mm · XL: 5.08 mm (0.200 in) |
| Belt Width Options |
6 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm |
| Unit Length |
1 Meter per unit |
| Tension Member |
Steel wire cord |
| Tooth Form |
See variant options |
| Operating Temperature |
See variant options |
| Compatible Pulley Types |
Standard metric and imperial pulleys matching selected tooth profile |
| Minimum Order Unit |
1 Meter |
❓ Frequently Asked Questions
How do I choose the right tooth profile for my application?
Match the tooth profile on this belt to the tooth profile engraved or stamped on your existing pulley. Common pairings: 2GT belts run on 2GT pulleys, HTD-5M belts run on HTD-5M pulleys, and XL belts run on XL pulleys. Profiles are not interchangeable — a 2GT belt will not mesh correctly with an HTD-3M pulley even if the pitch is similar.
What is the difference between HTD and S-series profiles (e.g., HTD-5M vs S5M)?
HTD (High Torque Drive) profiles use a curvilinear tooth form optimized for high-torque, lower-speed drives. S-series (e.g., S5M) use a modified curvilinear profile that is dimensionally similar but not always interchangeable. Always verify your pulley's exact designation before ordering. When in doubt, contact us to confirm compatibility.
Can I use this belt on a closed-loop (loop belt) application?
These are open-end belts sold by the meter — they are not pre-formed into a closed loop. They are designed for linear motion systems (e.g., CoreXY, H-bot, linear actuators) where the belt runs over a pulley and is clamped or anchored at each end. If you need a closed-loop belt, you will need a different product.
How many meters should I order for my 3D printer or CNC build?
For most desktop 3D printers (300 mm × 300 mm build area), 2–3 meters per axis is a common starting point, accounting for routing, tensioner travel, and a small cutting margin. Larger format machines or long-travel CNC gantries may require 4–6 meters or more per axis. Measure your full belt path — including any idler routing — before ordering.
Does the steel wire core affect how I cut or terminate the belt?
Yes. Use a sharp utility knife or belt cutter against a hard surface to make a clean, square cut. The steel wire cords are thin and will cut cleanly with a sharp blade. Avoid bending the cut end sharply before clamping, as this can cause individual wire strands to protrude. Standard belt clamps and printed belt anchors work well for termination.
Is PU more durable than rubber for timing belt applications?
In most workshop and motion-control environments, PU outperforms standard neoprene rubber in abrasion resistance and dimensional stability. PU also resists oils and light solvents better than rubber. However, rubber belts can be more flexible at very low temperatures. For typical 3D printing, CNC, and robotics use at room temperature, PU with a steel wire core is a durable, long-service choice.
What belt width should I choose for my drive system?
Belt width should match your pulley's usable face width. Wider belts carry more torque and are more resistant to lateral tracking errors, but require wider pulleys and more clearance. For lightweight 3D printer axes, 6 mm or 10 mm widths are standard. For CNC routers and heavier gantries, 15 mm–25 mm widths are more common. For high-torque industrial drives, 30 mm–40 mm widths are appropriate.
🛒 Select your Type, Belt Width, and Length above, then add to cart.
