Belt Sander

A belt sander is a machine in which an abrasive belt, spinning between two pulleys, removes material from the workpiece. It's one of the main tools of the shaping stage in a pipe workshop: it's used to rough out the shape of a drilled body (stummel), to remove excess from a mouthpiece, and in some workshops to prepare briar blocks before turning.

Which of these jobs falls to which machine depends on how much the belt itself can flex; for this reason, the type of abrasive is considered more decisive than the machine's brand. For where shaping fits in the overall production flow, see the how a pipe is made entry.

Belt and Abrasive Selection

The weight of the cloth on the belt's backing directly determines what can be done with it. In the abrasives industry, cloth backings are referred to by letter; the finest and most flexible of these is "J" weight. X and Y weights are stiffer and longer-lasting but reluctant to conform to a curved surface. In setups guided by finger pressure, J weight is therefore what's sought. Moving from rough shaping to a clean surface, using 120, 180, 220, and 320 grits in sequence is considered a customary progression. Belts from long-established manufacturers like Klingspor, Norton, Hermes, and 3M are the benchmark for this work; the same makers' economy product lines don't always give the same result.