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  • Good news for bad vibes
    Washers that add tension rather than friction keep bolted joints tight. Nord-Lock washers keep bolted joints tight in hydraulic hammers from Atlas-Copley. Nord-Lock washers are available in yellow zinc chromate carbon steel (RC 48) in sizes from #5 to 5 in. and M3 to M130, or in stainless steel (RC
  • Sneaking up on a solution
    a poppet valve, a hydraulic device that prevents fluid backflow. A particular design failed catastrophically after some period. It cracked and eventually broke a thin section when it slammed shut, " he says. To prepare for solving this problem, consider a long uniform bar traveling at a constant

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