Overlap wave washer,it is very good quality,the spring has been used on some product for many years Wave spring washers provide medium loads in a small axial space. This series has ends that overlap, in other words the two ends of the material strip lay on top of each other. This open construction with some overlap allows the ends to move during compression, which if constrained in a bore prevents binding. Common applications for this type of parts is adjacent to smaller bearings, where shaft take up or thermal expansion & contraction accommodation is required. The overlap is advantageous for such applications where the bore is made of softer material than the spring and the material thickness of the spring is relatively small.
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