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Belt type XL timing belts

5.08mm (0.200″) pitch · Trapezoidal teeth · Imperial sizes

XL timing belts have a 5.08mm (0.200″) pitch and the classic trapezoidal tooth. You’ll find them on domestic appliances, light machinery, small machine tools, vending machines and light conveyors, and on plenty of older and American-built machinery. They give a positive, slip-free drive with no stretch, so timing and speed stay exact. Search by the code on the old belt, such as 210XL037, and use the filters to narrow it down by length or width.

  • Pitch5.08mm (0.200″)
  • ToothTrapezoidal, imperial
  • Example210XL037
  • Teeth105 on a 21.0″ belt
  • Widths025 to 037 width codes

Finding the right XL belt

Reading the code210XL037 is a 21.0″ pitch length belt (the first number is the length in tenths of an inch), XL pitch, 3/8″ wide. The last three digits are the width in hundredths of an inch. Common widths are 025 (1/4″), 031 (5/16″) and 037 (3/8″).

Counting teethPitch length divided by the pitch gives the tooth count. A 21.0″ XL belt has 105 teeth. If the code has worn off, counting the teeth is the most reliable way to get the length.

XL or T5?An XL belt has a 5.08mm pitch; a T5 or 5M belt is exactly 5mm. Over a long belt that small difference adds up, so they can’t be mixed. Count the teeth and measure over ten pitches to be sure.

Tip: For the drive, we stock matching XL timing pulleys and imperial taper lock bushes. For serpentine drives, see DXL double-sided belts. Note: belts cut to width or length to order can’t be returned unless faulty, so check the pitch, length and width before ordering.
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