Question: When assembling the pulleys by pressing the flanges on the hubs with an arbor press, the flanges tend to split excessively in instances when the
When assembling the pulleys by pressing the flanges on the hubs with an arbor press, the flanges tend to split excessively in instances when the hub is relatively large and the flange hole is relatively small and when the flange material is relatively hard, even though all of these factors are within their stated toler¬
ances. In addition, if the press fit between hub and flange is loose, the spot¬
welding operation tends to pull the flanges off the axis of rotation. As a result, the pulley may be rejected because of excessive “wobble.” Inspection of daily production results in rejection of pulleys for these reasons. Table 13-13 is a record of production and rejections for 10 days.
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