XL Timing Belts: 1/5" Pitch, Trapezoidal Profile
XL timing belts are imperial-pitch synchronous belts with a 1/5" (0.200" / 5.08mm) pitch and a trapezoidal (straight-sided) tooth profile. The XL pitch is the most widely used light-duty trapezoidal timing belt in the United States, found in everything from office equipment, business machines, and small appliances to light industrial drives, medical devices, and vending machines.
XL belts are part of the original trapezoidal timing belt family alongside MXL, L, H, XH, and XXH. They are designed for low-torque, moderate-speed applications where compact drive size matters more than heavy load capacity. The trapezoidal tooth shape is the simplest and most widely supported profile in the industry, with extensive pulley availability.
Texas Belting stocks XL timing belts from Gates (PowerGrip), Diesel Belting, Continental, and Bando in standard widths of 1/4", 3/8", and 3/4", with pitch lengths from approximately 6" to over 100".
Quick Specs: XL Timing Belts
Pitch: 1/5" (0.200" / 5.08mm)
Tooth profile: Trapezoidal (straight-sided)
Tooth height: 0.050" (1.27mm)
Standard widths: 1/4" (025), 3/8" (037), 3/4" (075)
Body material: Neoprene (standard), polyurethane
Tensile cord: Fiberglass (standard), Kevlar
Temperature range: -30°F to +185°F (neoprene)
Profile family: Trapezoidal (MXL, XL, L, H, XH, XXH)
Dimensions: Imperial (inches)
How to Read an XL Timing Belt Part Number
XL belt part numbers follow an imperial format that is different from metric HTD belts. The part number encodes pitch length, profile, and width in a compact string. Here is how to decode it:
| Part Number | Pitch Length | Profile | Width | Notes |
|---|---|---|---|---|
| 200XL037 | 20.0" | XL | 3/8" (0.375") | Standard format: Length (x10) + Profile + Width (x1000) |
| 150XL037 | 15.0" | XL | 3/8" | The "150" means 15.0" pitch length (divide by 10) |
| 140XL025 | 14.0" | XL | 1/4" (0.250") | Narrow belt for light-duty compact drives |
| 208XL075 | 20.8" | XL | 3/4" (0.750") | Wide belt for higher-load XL applications |
| Gates 140XL037 | 14.0" | XL | 3/8" | Gates PowerGrip, same format as generic XL |
How to decode the pitch length: The number before "XL" is the pitch length in inches, multiplied by 10. So "200" = 20.0", "150" = 15.0", and "208" = 20.8". The number after "XL" is the width in thousandths of an inch: "037" = 0.375" = 3/8", "025" = 0.250" = 1/4", "075" = 0.750" = 3/4".
If the part number on your belt is worn or missing, measure the pitch across 10 teeth and divide by 10. A result close to 0.200" (5.08mm) confirms an XL belt. Then measure the width and count total teeth to calculate pitch length (teeth x 0.200"). See our full belt measurement guide for step-by-step instructions.
XL Timing Belt Widths
XL belts are available in three standard widths. Wider belts carry more load but require wider pulleys. The width must match the pulleys in your drive.
| Width Code | Width (Inches) | Width (mm) | Typical Use |
|---|---|---|---|
| 025 | 1/4" (0.250") | 6.35mm | Light-duty, compact drives, instruments, small motors |
| 037 | 3/8" (0.375") | 9.53mm | Most common XL width, general-purpose light industrial |
| 075 | 3/4" (0.750") | 19.05mm | Higher-load XL applications, wider pulleys required |
The 3/8" (037) width is by far the most commonly ordered XL belt. If you are replacing an XL belt and the width code is missing, 037 is the most likely width to check first.
XL vs Other Trapezoidal Timing Belt Pitches
XL is one of six pitches in the trapezoidal (imperial) timing belt family. Here is how it compares to its nearest neighbors.
| Feature | MXL (0.080") | XL (0.200") | L (0.375") |
|---|---|---|---|
| Pitch | 0.080" (2.032mm) | 0.200" (5.08mm) | 0.375" (9.525mm) |
| Torque capacity | Very low | Low | Low to medium |
| Speed range | Very high | Moderate to high | Moderate |
| Typical applications | Micro drives, instruments | Office equipment, small industrial, vending | General industrial, HVAC, textile, printing |
| Standard widths | 1/8", 3/16", 1/4" | 1/4", 3/8", 3/4" | 1/2", 3/4", 1", 1-1/2" |
| Tooth profile | Trapezoidal | Trapezoidal | Trapezoidal |
If your XL drive needs more torque than the widest XL belt (3/4") can deliver, the next step up is the L pitch (3/8" / 9.525mm), which provides significantly more load capacity with a larger tooth and wider belt options. XL and L belts are not interchangeable because the pitches and tooth sizes are different. Browse all timing belt pitches and profiles.
XL vs 5M Timing Belts: What is the Difference?
The XL (5.08mm) and 5M (5.00mm) pitches are very close in size but are not interchangeable. This is one of the most common sources of confusion when ordering timing belts. Here is how they differ.
| Feature | XL (Imperial) | 5M (Metric) |
|---|---|---|
| Pitch | 0.200" (5.08mm) | 5.00mm (0.197") |
| Tooth profile | Trapezoidal (straight-sided) | HTD curvilinear (rounded) |
| Load capacity | Lower (less tooth contact area) | Higher (fuller tooth engagement) |
| Pulley compatibility | XL pulleys only | HTD 5M pulleys only |
| Dimensions | Imperial (inches) | Metric (millimeters) |
| Part number format | 200XL037 | 535-5M-25 |
| Origin | Original US trapezoidal standard | Later metric HTD standard |
Key point: An XL belt will not work on a 5M pulley, and a 5M belt will not work on an XL pulley. The pitch difference is only 0.08mm, but the tooth shapes are completely different (trapezoidal vs curvilinear). Always check the pulley markings or the original belt part number to confirm which profile you need. If the part number starts with a number followed by "XL," it is an XL belt. If it contains "5M," it is a metric HTD belt. See our Tooth Profiles Explained guide for a visual comparison.
XL Belt Construction and Material Options
Standard Neoprene (Most Common)
The standard XL belt is a neoprene body with fiberglass tensile cords and nylon tooth facing. This is the default for virtually all general-purpose XL applications. It provides reliable, long-lasting performance in clean, dry, indoor environments at temperatures from approximately -30°F to +185°F.
Polyurethane / Urethane
Polyurethane XL belts are available for applications requiring better chemical resistance, abrasion resistance, or FDA compliance. Urethane XL belts resist oils, greases, and many cleaning chemicals better than neoprene. They are the right choice for food handling, pharmaceutical, and washdown environments. See our Urethane Timing Belts page for more details.
Kevlar Reinforced
Kevlar tensile cords are available as an upgrade over standard fiberglass for XL belts that need higher tensile strength or better fatigue resistance in high-cycle applications.
Long-Length XL Belts
Standard XL belt lengths typically range up to about 50". For longer pitch lengths, long-length or custom-cut XL belts are available. These are used in linear motion systems, custom conveyor builds, and specialty equipment with larger center distances. Texas Belting stocks select long-length XL belts and can source custom lengths on request.
Common XL Timing Belt Applications
XL belts are the most common light-duty trapezoidal timing belt pitch in the US market. They appear across a wide range of equipment types.
| Application | Why XL | Typical Width |
|---|---|---|
| Office and business equipment | Compact drive, low torque, reliable operation in printers, copiers, scanners | 025, 037 |
| Vending and dispensing machines | Precise product positioning, quiet operation, long service intervals | 037 |
| Medical and lab devices | Accurate, low-noise positioning in diagnostic and analytical equipment | 025, 037 |
| Small conveyor drives | Positive drive for light products in sorting and material handling | 037, 075 |
| Sewing machines | Synchronized motor-to-mechanism drive at moderate speeds | 025, 037 |
| Exercise and treadmill equipment | Reliable drive belt for consumer and commercial fitness machines | 037, 075 |
| Light industrial drives | Low-torque positive drive for small pumps, fans, and positioning systems | 037, 075 |
| Ticket and currency dispensers | Precise indexing for paper and card feed mechanisms | 025, 037 |
| Robotics and hobbyist projects | Affordable, widely available belt for DIY positioning and motion systems | 025, 037 |
XL Timing Belt Brands We Stock
| Brand | XL Product Line | Construction |
|---|---|---|
| Gates | PowerGrip XL | Neoprene, fiberglass cord |
| Continental / ContiTech | Synchroforce XL | Neoprene, fiberglass cord |
| Bando | Synchro-Link XL | Neoprene, fiberglass cord |
| Diesel Belting | Standard XL, Long-Length XL | Neoprene, fiberglass cord |
We cross-reference XL belt part numbers across all manufacturers. If you have a Gates PowerGrip XL and need a Diesel Belting or Continental equivalent, send us the part number and we will confirm the match.
XL Timing Belt FAQs
What is an XL timing belt?
An XL timing belt is a synchronous (toothed) power transmission belt with a 1/5" (0.200" / 5.08mm) pitch and a trapezoidal tooth profile. XL stands for "Extra Light" and is the most common light-duty trapezoidal timing belt in the US. It is used in office equipment, vending machines, medical devices, small conveyor drives, and light industrial applications.
What does XL mean on a timing belt?
XL stands for "Extra Light," indicating the belt's position in the trapezoidal timing belt family. The trapezoidal pitches range from MXL (Miniature Extra Light) to XXH (Double Extra Heavy). XL is the second-smallest pitch, designed for low-torque, compact drives.
How do I read an XL timing belt part number?
An XL part number like 200XL037 encodes three specs. The number before "XL" is the pitch length in inches multiplied by 10: 200 = 20.0". The "XL" is the profile. The number after "XL" is the width in thousandths of an inch: 037 = 0.375" = 3/8". So 200XL037 is a 20" pitch length, XL profile, 3/8" wide belt.
Can I use a 5M belt on an XL pulley?
No. Although the XL pitch (5.08mm) and 5M pitch (5.00mm) are very close in size, the tooth profiles are completely different. XL uses a trapezoidal (straight-sided) tooth and 5M uses a curvilinear (rounded) HTD tooth. They require different pulleys and are not interchangeable. Always confirm which profile your pulleys are designed for before ordering.
What widths are available for XL timing belts?
Standard XL widths are 1/4" (025), 3/8" (037), and 3/4" (075). The 3/8" width is the most commonly used. The width is the last three digits of the part number: 025, 037, or 075.
What is the difference between XL and L timing belts?
XL and L are both trapezoidal profile timing belts but with different pitches. XL has a 1/5" (0.200") pitch for light-duty drives. L has a 3/8" (0.375") pitch for medium-duty drives with higher load capacity. They use different pulleys and are not interchangeable. If your XL belt cannot handle the load, stepping up to an L pitch belt (with matching pulleys) is the typical upgrade path within the trapezoidal family.
Are long-length XL timing belts available?
Yes. Standard XL lengths typically go up to about 50", but long-length XL belts are available for applications with larger center distances, such as linear motion systems and custom conveyor builds. Texas Belting stocks select long-length XL belts and can source custom lengths on request.
How do I measure an XL timing belt for replacement?
Measure the pitch by spanning 10 teeth with a caliper or ruler and dividing by 10. A result close to 0.200" (approximately 5mm) confirms an XL belt. Check that the teeth are straight-sided (trapezoidal), not rounded (which would indicate a 5M HTD belt). Measure width straight across the belt. For pitch length, count total teeth and multiply by 0.200", or read the first three digits of the part number and divide by 10. See our complete belt measurement guide.
XL Drive Components
Every XL belt needs a matched XL timing pulley. The pulley tooth profile must match the belt profile exactly. Browse our trapezoidal timing pulleys, or see our Sprocket Selection Guide for help choosing the right one.
Related Pages
← All Timing Belts • L Timing Belts • H Timing Belts • HTD Timing Belts • 5M Timing Belts • 8M Timing Belts • GT Timing Belts • Gates Timing Belts • Tooth Profiles Explained • Timing Belt Selection Guide • Pitch Chart • Troubleshooting Guide • Urethane Timing Belts • Food Grade Timing Belts
