ATL-Series Linear Positioning Timing Belts
ATL-Series Linear Positioning Timing Belts
ATL-Series timing belts are polyurethane synchronous belts specifically optimized for linear positioning applications. They use the same AT-type curvilinear tooth profile as the standard AT-Series, but are manufactured with tighter pitch tolerances and a construction that maximizes axial stiffness and minimizes cumulative pitch error over long belt lengths. This makes the ATL-Series the preferred belt for precision linear drives where positioning repeatability is the primary design requirement.
Texas Belting stocks ATL-Series belts in ATL5, ATL10, and ATL20 pitches. Open-ended belts are available in lengths exceeding 100 meters for long-travel gantry applications. Welded endless and truly endless configurations are also available. All ATL belts feature steel cord tension members for near-zero elongation under load.
- Pitches: ATL5, ATL10, ATL20
- Tooth profile: AT-type curvilinear (linear-optimized)
- Positioning repeatability: ±0.05mm per meter
- Open-ended lengths: 100+ meters available
- Widths: 16mm to 100mm depending on pitch
- Tension member: steel cord (maximum axial stiffness)
- Compatible with standard AT-Series pulleys
- Cumulative pitch error specs available on request
ATL5: 5mm Pitch
The most compact ATL pitch for precision linear drives in smaller machines. ATL5 belts are commonly used in 3D printers, small CNC routers, laser cutters, and compact pick-and-place systems.
| Configuration | Available Widths (mm) | Details |
|---|---|---|
| Open-Ended | 16, 25, 32, 50 | Sold per meter, custom lengths |
| Welded | 16, 25, 32, 50 | Custom endless lengths |
| Truly Endless | 16, 25, 32, 50 | Standard pitch lengths available |
ATL10: 10mm Pitch
The most widely specified ATL pitch for industrial linear positioning. ATL10 belts handle higher loads than ATL5 while maintaining the tight pitch tolerances needed for precision gantry systems, CNC machines, and automated storage and retrieval systems.
| Configuration | Available Widths (mm) | Details |
|---|---|---|
| Open-Ended | 25, 32, 50, 75, 100 | Sold per meter, lengths to 100m+ |
| Welded | 25, 32, 50, 75, 100 | Custom endless lengths |
| Truly Endless | 25, 32, 50, 75, 100 | Standard pitch lengths available |
ATL20: 20mm Pitch
The heavy-duty ATL pitch for large-format linear positioning systems. ATL20 belts are specified for long-travel gantry robots, large CNC machines, and heavy-payload linear drives where both high load capacity and positioning accuracy are required.
| Configuration | Available Widths (mm) | Details |
|---|---|---|
| Open-Ended | 25, 32, 50, 75, 100 | Sold per meter, lengths to 100m+ |
| Welded | 25, 32, 50, 75, 100 | Custom endless lengths |
| Truly Endless | 25, 32, 50, 75, 100 | Standard pitch lengths available |
ATL-Series Technical Specifications
The table below lists the drive design specifications for each ATL pitch. For complete engineering data including tensile strength and allowable tooth loads, see the timing belt specifications reference.
| Pitch | Min. Pulley Teeth | Min. Flat Idler, Tooth Side (mm) | Min. Flat Idler, Back Side (mm) |
|---|---|---|---|
| ATL5 | 25 | 40 | 60 |
| ATL10 | 25 | 80 | 150 |
| ATL20 | 25 | 60 | 250 |
ATL-Series vs. Standard AT-Series
ATL and AT-Series belts share the same curvilinear tooth profile and are compatible with the same AT-profile pulleys. The key differences are in manufacturing tolerances and construction, not tooth geometry.
| Property | AT-Series | ATL-Series |
|---|---|---|
| Primary use | Rotary power transmission | Linear positioning |
| Pitch tolerances | Standard | Tighter (reduced cumulative pitch error) |
| Axial stiffness | Standard | Maximized for minimal elongation under load |
| Positioning repeatability | Good | ±0.05mm per meter (with steel cord) |
| Maximum open-ended length | Standard rolls | 100+ meters for long-travel systems |
| Pulley compatibility | AT-profile pulleys | Same AT-profile pulleys |
Common Applications
ATL-Series belts are specified wherever a linear drive system requires the highest positioning accuracy. Typical applications include CNC gantry systems (routers, laser cutters, waterjet machines), Cartesian robots, pick-and-place machines, automated storage and retrieval systems (AS/RS), shuttle systems, semiconductor wafer handling equipment, printing press registration drives, and long-travel positioning stages for measurement and inspection systems.
For applications requiring belt clamping hardware, tensioners, or custom linear drive accessories, see the timing belt accessories page. For precision-ground AT-profile pulleys optimized for linear drives, see the high precision pulleys page.
Frequently Asked Questions
ATL belts are manufactured with tighter pitch tolerances and use a construction optimized for maximum axial stiffness rather than flex life. This reduces cumulative pitch error over long belt lengths and minimizes elongation under load, resulting in measurably better positioning accuracy and repeatability in linear systems. The tooth profile itself is the same AT curvilinear geometry, so ATL belts run on standard AT-Series pulleys.
ATL belts with steel cord tension members can achieve positioning repeatability of ±0.05mm per meter in properly designed linear drive systems. This level of accuracy makes them suitable for CNC machines, laser cutters, pick-and-place robots, and precision gantry systems. Actual repeatability depends on the complete drive design including pulley quality, belt tension, and mechanical rigidity.
ATL open-ended belts can be supplied in lengths exceeding 100 meters for long-travel gantry applications. The steel cord tension member maintains consistent pitch accuracy over the full belt length. Cumulative pitch error specifications are available on request for applications requiring guaranteed accuracy over long travel distances. Contact Texas Belting at 888-203-2358 for long-travel belt quotes.
Yes. ATL belts use the same AT-type tooth profile and run on standard AT-Series pulleys of the same pitch. The improved precision comes from tighter manufacturing tolerances in the belt construction, not from a different tooth geometry. For the best results in precision linear drives, precision-ground pulleys are recommended to complement the belt's tight tolerances.
ATL belts are commonly specified in CNC gantry systems (routers, laser cutters, waterjet machines), Cartesian and gantry robots, automated storage and retrieval systems (AS/RS), pick-and-place machines, semiconductor wafer handling, printing press registration drives, and any linear motion application requiring high positional accuracy over extended travel distances.
Choose based on load requirements and available space. ATL5 is suitable for light to moderate loads with compact pulleys (3D printers, small CNC machines, laser engravers). ATL10 handles heavier loads and is the most common choice for industrial gantry systems and AS/RS equipment. ATL20 is for the heaviest payloads and longest travel distances where maximum load capacity is needed. Contact Texas Belting at 888-203-2358 for help selecting the right pitch for your linear drive.
Yes. ATL belts support backing materials and machined modifications including drilled mounting holes, machined clamp plates, and V-guide slots. These modifications are commonly used in linear drive systems where the belt must be clamped to a carriage or guided along a track. Belt clamps and tensioning hardware are available through the accessories page.
Cumulative pitch error is the total deviation in tooth spacing that accumulates over the length of the belt. In a rotary drive, small pitch variations average out over each revolution. In a linear drive, they accumulate along the belt's travel, directly affecting positioning accuracy. ATL belts are manufactured to minimize cumulative pitch error, which is why they deliver better positioning accuracy than standard AT belts in linear applications. Detailed cumulative pitch error data is available on request.
Need ATL-Series Linear Drive Belts?
Send us your pitch, width, length, and accuracy requirements. We will confirm availability and provide a quote.