Pump Drive Components Spidex® NBL Coupling Misalignment The NBL coupling handles the axial, angular and radial misalignment whilst retaining it's zero backlash properties due to its spider design. Axial misalignmen ct an be caused by different shaft tolerances or by thermal expansion of shafts. The NBL series coupling handles axial misalignment while keeping reactionary forces low. Radial misalignmen ctan be defined as a measure of the offset distance between the centrelines of the driving and driven shafts. This type of misalignment causes the highest stress due to the forces involved. Angular misalignmen ctan be defined as a measure of the angle between the centre lines of the driving and driven shafts, where those centre lines would intersect approximately halfway between shaft ends. The NBL coupling can handle a specific amount of angular misalignment for each given size. Refer to table on next page. 25 #DriveLineHarmony www.jbj.co.uk/couplings.html
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