Belt type SPA wedge belts
12.7mm wide · 10mm deep · Multiple leading brands
SPA wedge belts handle more power than SPZ, and their deep, narrow profile transmits more than a classical
belt of a similar width, so drives stay compact. You’ll find SPA belts on larger motors, pumps and
compressors, supply and extract fans, air handling units, and industrial and agricultural machinery. We
stock SPA 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 SPA1500, 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 SPA belt
Reading the codeSPA1500 means an SPA belt with a 1500mm 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 SPA pulleys. Choose Optibelt for the longest life on hard-working or continuous drives, or a value brand for occasional-use machinery.
SPA or A?An SPA belt is 12.7mm wide and 10mm deep. A classical A belt is a similar width but shallower, at 8mm, 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 XPA belt; for hard-to-reach drives, a maintenance-free SPA belt that never needs re-tensioning.
