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Spieth Adjustable Locknuts adjust, preload, and secure bearings and other machine components on shafts and spindles with a high degree of stiffness. They permit the correct setting of the axial preload of bearings and ensure that the working loads are carried safely. The locknuts are secured positively without additional components, keys, or extra machining. The high load-carrying ability of the locknut is achieved through full 360° contact around the thread flanks guaranteeing a vicegrip locking effect. This contact around the full circumference ensures that the locknut will not loosen, even when subjected to extreme shock loads. This is an important feature, since locking with many commercially available locknuts relies on only one or a few "pinch" points on the circumference of the thread. Another advantage of the SPIETH locknut is the feature of aligning its contact face either with zero runout or, if necessary, adjusted to suit inaccuracies of in-line connecting components, thus compensating for minor errors of parallelism due to the stack-up of mating parts. Spindle runout, due to uneven bearing loading, can therefore be eliminated. A high degree of accuracy can be maintained even when repetitive tightening and loosening are required. The benefits of the SPIETH locknuts offer solutions for a wide range of general precision, heavy machinery, and equipment applications. The unique locking capability, with high stiffness and accuracy, is excellent for spindle applications - - especially suited for high speed and/or high dynamically-loaded spindles or mechanisms.

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