Open-End Timing Belt — Cut-to-Length 2GT, S2M, 3M, 5M, 8M, MXL, XL & L Profiles for CNC, 3D Printers & Power Transmission
When your CNC router skips steps, your 3D printer loses position, or your conveyor drive needs a custom-length replacement, the culprit is often a worn or incorrectly sized timing belt. Makers, engineers, and repair technicians who need an open-end timing belt they can cut to any exact length — without waiting on custom orders — will find this listing covers the most common metric and imperial profiles in one place.
Each order is sold by the meter in continuous open-end (non-looped) form. Available profiles are 2GT (GT2) TPU, 2GT Rubber, 2GT with Steel Wire, S2M Rubber, S2M with Steel Wire, 3M, 5M, 8M, MXL, XL, and L. Belt widths range from 6mm (≈1/4") to 30mm (≈1-3/16"). Quantity options are 1m, 2m, 5m, and 10m per variant — order multiple meters to have stock on hand for future repairs or projects.
Typical applications include open-loop CNC timing belt drives, 3D printer X/Y axis belt replacement, light-duty conveyor and indexing systems, laser cutter gantry drives, and general power transmission where a standard closed-loop belt is unavailable or a custom length is required. The wide profile selection makes this a practical single-source solution for workshop and lab environments.
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Compatibility Note: Match belt profile and width to your existing pulleys before ordering. 2GT and GT2 profiles are generally interchangeable. MXL / XL / L are imperial trapezoidal; 3M / 5M / 8M are metric HTD curvilinear; S2M is metric curvilinear. Mixing profiles will cause tooth skipping.
✅ Key Features of These Open-End Timing Belts
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📐Cut-to-Any-Length Flexibility — Sold as open-end continuous strip in 1m, 2m, 5m, and 10m lengths, so you can cut precisely to your drive geometry without waste or splicing a closed loop.
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🔩Steel-Cord Reinforcement Option — 2GT and S2M steel-wire variants use embedded steel cord for reduced elongation under tension, making them well-suited for positioning-critical CNC timing belt drives and linear actuators.
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🧱Multiple Material Choices — TPU offers oil resistance and flexibility for 3D printer belt replacement; rubber provides good elasticity for general power transmission; steel-cord variants handle higher sustained loads.
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📏Wide Width Range (6–30mm) — Six width options from 6mm (≈1/4") to 30mm (≈1-3/16") let you match the exact pulley face width, from compact 3D printer axes to wider conveyor and indexing belt drives.
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🔄Broad Profile Coverage — Eleven profiles in one listing — 2GT, S2M, 3M, 5M, 8M, MXL, XL, L — covering the most common metric HTD, metric curvilinear, and imperial trapezoidal open timing belt standards used in North American workshops.
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🏭Consistent Tooth Geometry — Molded tooth profiles maintain dimensional accuracy along the full belt length, supporting reliable meshing with standard off-the-shelf pulleys and reducing the risk of tooth jump under normal operating loads.
📐 Technical Specifications — Open-End Timing Belt
| Belt Type |
Open-end (non-looped), cut-to-length |
| Available Profiles |
2GT (GT2) TPU, 2GT Rubber, 2GT with Steel Wire, S2M Rubber, S2M with Steel Wire, 3M, 5M, 8M, MXL, XL, L |
| Tooth Pitch — 2GT / S2M |
2mm (≈0.079") |
| Tooth Pitch — 3M |
3mm (≈0.118") |
| Tooth Pitch — 5M |
5mm (≈0.197") |
| Tooth Pitch — 8M |
8mm (≈0.315") |
| Tooth Pitch — MXL |
2.032mm (0.080") |
| Tooth Pitch — XL |
5.08mm (0.200") |
| Tooth Pitch — L |
9.525mm (0.375") |
| Available Widths |
6mm (≈1/4"), 10mm (≈3/8"), 15mm (≈19/32"), 20mm (≈25/32"), 25mm (≈1"), 30mm (≈1-3/16") |
| Available Lengths |
1m (≈39.4"), 2m (≈78.7"), 5m (≈196.9"), 10m (≈393.7") |
| Cord Reinforcement |
Fiberglass (TPU/Rubber variants); Steel wire (Steel Wire variants) |
| Tooth Profile Shape |
Curvilinear (2GT, S2M, 3M, 5M, 8M); Trapezoidal (MXL, XL, L) |
| Operating Temperature |
See variant options — confirm with product datasheet for specific material |
| Recommended Pulley Match |
Must match belt profile and width exactly |
| Country of Origin |
Contact us to confirm |
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Before ordering: Verify your pulley's tooth profile, pitch, and face width. Not all width options are available for every profile — check the variant selector above. If you are unsure which profile matches your application, contact us with your pulley part number.
❓ Frequently Asked Questions
How do I calculate the belt length I need?
For a two-pulley open drive, the standard formula is: L = 2C + π(D1 + D2)/2, where C is the center-to-center distance and D1/D2 are the pulley pitch diameters. Because this is an open-end belt you cut to length, it is generally advisable to order slightly more than your calculated value to allow for trimming. For reference, 500mm is approximately 19.7" and 1000mm is approximately 39.4".
What is the difference between TPU, rubber, and steel-cord belt types?
TPU (thermoplastic polyurethane) belts are flexible, oil-resistant, and typically well-suited for light-to-medium duty applications such as 3D printer X/Y axis drives and small CNC machines. Rubber belts offer good elasticity and are commonly used in general power transmission. Steel-cord reinforced belts provide higher tensile strength and minimal stretch under load, making them a better choice for applications requiring precise linear positioning.
Can these belts be used outdoors or in wet environments?
TPU and rubber timing belts generally offer moderate resistance to moisture and mild chemicals. For prolonged outdoor or wet-environment use, steel-cord reinforced variants are typically more durable. Avoid prolonged exposure to strong solvents, fuels, or direct UV radiation without first confirming material compatibility for your specific application.
Which belt profile is compatible with my pulleys?
Each profile has a specific tooth pitch and geometry that must match your pulley exactly. As a general guide: 2GT / GT2 are typically interchangeable and are the standard for most 3D printers and small CNC routers. MXL, XL, L are imperial trapezoidal profiles common in older US-made equipment. 3M, 5M, 8M are metric HTD curvilinear profiles used in higher-torque drives. S2M is a metric curvilinear profile with a 2mm pitch. Mixing profiles will cause tooth skipping and premature wear.
How do I choose the correct belt width?
Belt width should match or be within the rated range of your pulley's face width. Available widths are 6mm (≈1/4"), 10mm (≈3/8"), 15mm (≈19/32"), 20mm (≈25/32"), 25mm (≈1"), and 30mm (≈1-3/16"). Wider belts generally carry higher loads. Note that not every width is available for every profile — check the variant selector to confirm availability for your chosen profile.
How much tension or load can these belts handle?
Allowable tension varies by profile, width, and material. Steel-cord reinforced belts typically handle higher sustained tension than rubber or TPU variants of the same profile and width. For critical load calculations, consult the published tension ratings for your specific profile. As a general rule, wider belts in the same profile carry proportionally higher loads.
Can I join two pieces together to make a longer belt?
Open-end timing belts can in some cases be joined using timing belt lacing or mechanical fasteners designed for this purpose, though joints generally reduce tensile strength and can introduce positioning error. For most precision CNC and 3D printer applications, ordering a single continuous length is recommended. We offer lengths up to 10m (≈393.7") per order.
Is this belt suitable for 3D printer use (e.g., Ender, Voron, CoreXY)?
The 2GT TPU and 2GT Rubber variants in 6mm width are typically compatible with most consumer 3D printers that use GT2 pulleys, including Ender series, Voron, and CoreXY designs. Always verify your printer's belt profile and width specification before ordering. The 2GT with Steel Wire variant is generally preferred for high-speed or high-acceleration motion systems where belt stretch is a concern.
🛒 Select your profile, width, and quantity above, then add to cart — ships from our US warehouse.
