Belt type SPZ wedge belts
9.7mm wide · 8mm deep · Multiple leading brands
SPZ is the most widely used wedge belt, and its deeper, narrower profile transmits more power than a
classical belt of the same width, so drives can be smaller and lighter. You’ll find SPZ belts on
electric motors, pumps, compressors, fans and air handling units, and industrial machinery of all kinds. We
stock SPZ belts from several leading manufacturers, so you can choose the right balance of performance and
price. Search by the code on the old belt, such as SPZ1250, and use the filters to narrow it down by length
or brand.
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OptibeltOur premier brand, for long life on demanding drives
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MegadyneHigh-quality Italian belts for industrial drives
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BandoJapanese quality for industrial and agricultural use
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GatesOne of the world’s best-known belt makers
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PIXGood-value belts for general-purpose drives
Finding the right SPZ belt
Reading the codeSPZ1250 means an SPZ belt with a 1250mm datum length (Ld). Wedge belts are almost always sized by datum length in millimetres, which is measured at the belt’s pitch line rather than round the inside or outside.
Which brand?Every belt here fits the same SPZ pulleys. Choose Optibelt for the longest life on hard-working or continuous drives, or a value brand for occasional-use machinery.
SPZ or Z?An SPZ belt is 9.7mm wide and 8mm deep. A classical Z belt is a similar width but shallower, at 6mm, and sits differently in the pulley, so measure the depth to be sure.
Tip: on drives with two or more belts, replace them all at once with a matched set of the same brand. For small pulleys, try a cogged XPZ belt; for hard-to-reach drives, a maintenance-free SPZ belt that never needs re-tensioning.
