Positive Drive Pd® MXL, XL, L, H, XH, XXH, Timing Pulleys
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Timing belts and pulleys accommodate various loads, speeds, and applications, with five stock pitches, widths, and diameters. Pitch, the distance between groove or tooth centers, must match between belts and pulleys. MPB pulleys require machining for shaft fit, set screws, and keyways, while QD pulleys use bushings selected based on shaft size. Flanged pulleys prevent belt misalignment due to side thrust, typically applied to the smaller pulley for efficiency. Steel pulleys are standard, with aluminum options available upon request.
