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Belt type 8M HTD timing belts & RPP8

8mm pitch · Round HTD teeth · Metric sizes

8M timing belts are HTD (High Torque Drive) belts with a 8mm pitch and rounded teeth, which carry more load and run more quietly than the older trapezoidal designs. RPP8 is Megadyne’s parabolic-tooth version and runs in the same pulleys. You’ll find 8M belts on industrial machinery, pumps, compressors, conveyors and machine tools. Search by the code on the old belt, such as 8M-1200-30, and use the filters to narrow it down by length or width.

  • Pitch8mm
  • ToothRound HTD profile
  • Example8M-1200-30
  • Teeth150 on a 1200mm belt
  • WidthsCommonly 20, 30, 50 and 85mm

Finding the right 8M belt

Reading the code8M-1200-30 is a 8M belt with a 1200mm pitch length and a 30mm width. Some brands write it the other way round, such as 1200-8M-30 or 30-8M-1200, but the numbers mean the same thing.

Counting teethPitch length divided by 8mm gives the tooth count, so a 1200mm 8M belt has 150 teeth. If the code has worn off, count the teeth and multiply by 8 for the length.

HTD or Supertorque?Supertorque S8M belts have the same 8mm pitch but a different tooth shape. They need their own pulleys, so check the tooth profile before swapping.

Tip: For the drive, we stock matching 8M timing pulleys and metric taper lock bushes. For serpentine drives, see D8M 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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