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Belt type S3M Supertorque timing belts

3mm pitch · Supertorque (STD) teeth · Metric sizes

S3M belts use the Supertorque (STD) tooth, a modified round tooth that carries more torque, runs more quietly and positions more accurately than a standard HTD belt of the same pitch. You’ll find them on office machines, small power tools and light automation. Search by the code on the old belt, such as S3M-300-9, and use the filters to narrow it down by length or width.

  • Pitch3mm
  • ToothSupertorque (STD)
  • ExampleS3M-300-9
  • Teeth100 on a 300mm belt
  • PulleysS-profile pulleys

Finding the right S3M belt

Reading the codeS3M-300-9 is a S3M belt with a 300mm pitch length and a 9mm width. The S at the front tells you it’s the Supertorque profile.

Counting teethPitch length divided by 3mm gives the tooth count, so a 300mm S3M belt has 100 teeth.

Supertorque or HTD?An S3M belt has the same 3mm pitch as an 3M HTD belt, but the teeth are shaped differently and need S-profile pulleys. Replace like for like; if the old belt has no S in the code, it’s probably HTD.

Tip: Belts cut to width or length to order can’t be returned unless faulty, so check the pitch, length and width before ordering.

  • No code?Measure the pitch, count the teeth and measure the width. Our how to measure guide shows you how.
  • Other sectionsTry S2M, S5M, S8M or S14M Supertorque, or 3M HTD belts.
  • Still not sure?Call 020 8138 2848 with the code or measurements and we'll find the right belt.
  • Buying for a business?Open a trade account for trade pricing on maintenance stock and repeat orders.
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