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Belt type DH double-sided timing belts

12.7mm pitch · Teeth on both faces · Same pulleys as H

DH belts are H timing belts with teeth on both faces, so one belt can drive pulleys on either side. They’re used on serpentine drives where shafts need to turn in opposite directions, such as textile, printing, packaging and agricultural machinery. Search by the code on the old belt, such as D450H100, and use the filters to narrow it down by length or width.

  • Pitch12.7mm, same as H
  • ToothTrapezoidal, both sides
  • ExampleD450H100
  • PulleysStandard H pulleys
  • UseSerpentine and reversing drives

Finding the right DH belt

Reading the codeD450H100 is the H code with a D in front: same pitch length, pitch and width as 450H100, but toothed on both sides.

Single or double sided?If the drive only uses the teeth on one side, a standard H belt of the same size will do the job for less. Fit a double-sided belt where pulleys or idlers run on the back of the belt.

MeasuringMeasure the pitch over ten teeth on either face and divide by ten, count the teeth on one side for the length, and measure the overall width.

Tip: DH belts are thicker than a single-sided H belt, so check there’s clearance on the drive. Note: 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 DXL, DL or H single-sided belts, or D8M metric double-sided.
  • 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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