AT15 Timing Belts (15mm Modified Metric Trapezoidal)
AT15 timing belts are heavy-duty modified metric trapezoidal belts with a 15mm pitch, designed for the most demanding linear motion gantry systems, large-format CNC machines, heavy industrial automation, and extreme-torque positioning drives. AT15 is the second-largest pitch in the AT-profile family, positioned between AT10 (10mm) and AT20 (20mm). The 15mm pitch provides deep tooth engagement and very high shear strength for applications that exceed AT10 capacity.
AT15 timing belts are manufactured from polyurethane with steel wire or Kevlar tensile cords and are available in both closed-loop and open-end (continuous roll) form. Open-end AT15 with steel cord is specified for the heaviest European-designed gantry and positioning systems. Texas Belting stocks AT15 timing belts for same-day shipping from Houston.
Pitch: 15mm (0.591")
Tooth profile: Modified trapezoidal (AT, wider tooth base)
Profile family: AT-Profile (AT3, AT5, AT8, AT10, AT15, AT20)
Standard widths: 25, 32, 50, 75, 100, 150mm
Primary material: Polyurethane with steel cord (standard); Kevlar cord available
Temperature range: -22°F to +176°F (-30°C to +80°C) standard
Formats: Closed-loop (welded endless) and open-end (continuous roll)
AT15 Part Number Decoder
Standard Format: [Pitch Length]AT15-[Width]
| Part Number | Pitch Length | Width | Teeth | Construction |
|---|---|---|---|---|
| 600AT15-32 | 600mm | 32mm | 40 | Urethane, steel cord |
| 900AT15-50 | 900mm | 50mm | 60 | Urethane, steel cord |
| 1350AT15-75 | 1350mm | 75mm | 90 | Urethane, steel cord |
| 2100AT15-100 | 2100mm | 100mm | 140 | Urethane, steel cord |
| AT15-75 (open-end) | Per cut length | 75mm | Per length | Urethane, steel cord |
How to calculate teeth: Divide pitch length by 15. Example: 1350 / 15 = 90 teeth. Open-end AT15 belts are sold by the meter and cut to any required length. Some manufacturers reverse the format (for example, 75AT15-1350). Texas Belting can cross-reference AT15 part numbers from any manufacturer. Call 888-203-2358 or send us your part number.
AT15 Width Guide
| Width (mm) | Width (Inches approx.) | Typical Applications |
|---|---|---|
| 25mm | 0.98" | Lightest AT15 drives, uncommon. Consider AT10 for lighter loads. |
| 32mm | 1.26" | Light to moderate heavy-duty drives |
| 50mm | 1.97" | Common general-purpose AT15 width, heavy gantry systems |
| 75mm | 2.95" | Most popular heavy-duty AT15 width. Large CNC, waterjet tables. |
| 100mm | 3.94" | Very heavy gantry, large industrial positioning systems |
| 150mm | 5.91" | Maximum standard AT15 width. Extreme load applications. Consider AT20 if more capacity needed. |
Open-end urethane AT15 belts can be cut to custom widths from wider stock rolls. Contact Texas Belting for non-standard width availability.
AT15 vs. Other Heavy-Duty Timing Belt Pitches
| Profile | Pitch | Tooth Form | Load Capacity | Best For |
|---|---|---|---|---|
| AT10 | 10mm | Modified trapezoidal (AT) | Very heavy | Heavy gantries, CNC routers, standard heavy AT-profile applications |
| AT15 | 15mm | Modified trapezoidal (AT) | Extreme | Heaviest gantry systems, large-format CNC, extreme-load positioning |
| AT20 | 20mm | Modified trapezoidal (AT) | Maximum | Largest AT-profile. Heaviest industrial positioning and material handling. |
| 14M (HTD) | 14mm | Curvilinear (HTD) | Very heavy | Closest HTD pitch to AT15, high-horsepower industrial drives |
| XH | 22.225mm (7/8") | Trapezoidal (ANSI) | Very heavy | US-standard heavy-duty drives, closest ANSI equivalent in load class |
| Poly Chain GT Carbon | 8mm / 14mm | Modified curvilinear (GT) | Extreme | Chain drive replacement, narrow width at extreme torque |
AT15 fills the gap between AT10 and AT20 for applications that exceed AT10 capacity but do not require the full size of AT20. The closest HTD equivalent is 14M (14mm pitch), which uses a curvilinear tooth. For existing AT15 equipment, always match the AT15 profile exactly. See the Timing Belt Tooth Profiles Explained guide for full comparisons.
AT15 for Heavy Linear Motion
AT15 is specified for the heaviest linear motion gantry systems in European-designed automation, where AT10 has reached its load limits. AT15 applications include the largest CNC router gantries, heavy stone and metal cutting tables, bridge cranes with belt-driven positioning, and large-format waterjet systems.
- Open-end urethane AT15 with steel cord is the standard construction for extreme-load linear motion. Cut to any length. Joined with mechanical connectors or welded splices.
- 75mm and 100mm widths are the most common for heavy AT15 linear motion. 150mm for the most extreme loads.
- Steel cord provides 0.02% elongation under load, maintaining carriage position accuracy over travel distances of 5 meters or more.
- AT15 is chosen over AT10 when carriage weight, acceleration forces, or sustained torque requirements exceed AT10's capacity at maximum available width.
For more detail on urethane belt options for linear motion, see Urethane Timing Belts and Timing Belts for Linear Motion.
AT15 Timing Belt Materials
| Property | Steel Cord (Standard) | Kevlar Cord |
|---|---|---|
| Elongation | 0.02% (near-zero) | 0.3 to 0.5% |
| Best for | Linear motion, heavy positioning, indexing | Rotary drives where flex life around pulleys is critical |
| Minimum pulley size | Larger (steel is stiffer) | Smaller (Kevlar flexes tighter) |
| Chemical resistance | Excellent (urethane body) | Excellent (urethane body) |
| FDA available | Yes | Yes |
| Open-end available | Yes (standard) | Yes (less common) |
AT15 belts are manufactured exclusively from polyurethane. Neoprene AT15 belts are not produced. For food-contact applications, AT15 belts are available in FDA-compliant polyurethane grades. See Food Grade Timing Belts.
Common AT15 Timing Belt Applications
| Application | Why AT15 | Typical Width |
|---|---|---|
| Extreme-load linear motion gantry | Highest AT-profile capacity below AT20. Near-zero stretch steel cord. | 75 to 150mm |
| Large-format CNC routers | Very heavy gantry with long travel and high acceleration | 75 to 100mm |
| Heavy waterjet and plasma tables | Extreme gantry weight over large table areas | 75 to 150mm |
| Bridge crane positioning | Belt-driven bridge positioning requiring extreme load capacity | 75 to 150mm |
| Large industrial automation | European heavy material handling and positioning systems | 50 to 100mm |
| Stone and metal cutting tables | Very heavy cutting head gantry with precision positioning | 75 to 100mm |
| Heavy palletizing systems | Extreme carriage loads with fast cycle positioning | 50 to 100mm |
| Custom heavy conveyors | Open-end for custom lengths on high-load conveyor drives | 50 to 100mm |
For lighter loads, step down to AT10 (10mm) or AT8 (8mm). For the absolute heaviest loads in the AT family, step up to AT20 (20mm). See the Timing Belt Selection Guide.
AT15 Timing Belt Brands We Carry
| Brand | AT15 Product Lines | Notes |
|---|---|---|
| Gates | PowerGrip AT15 | Limited AT range at this pitch |
| Continental / ContiTech | Synchroflex AT15 | Industry leader in large-pitch AT-profile urethane |
| Bando | Bando AT15 | High-quality Japanese manufacturing |
| Diesel Belting | Diesel AT15 | Cost-effective replacement option |
| Megadyne | Megalinear AT15 | Open-end specialist. Strong large-pitch AT range. |
Not sure which brand to specify? Request a quote or call 888-203-2358.
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