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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
  • How tight is right?
    , the combined under-head and thread friction torque absorbed 80 N-m, leaving about 20 N-m to produce clamp force. Designers typically qualify clamp force of a bolted joint by the amount of torque applied to fasteners holding it, either as they're tightened or after the fact. The approach may be adequate
  • Plane Bearings That Grease Themselves
    , and a chain running through a channel are all examples of plane bearing. Sleeve or flange bushings, thrust washers, linear-slide plates, friction bearings, and wear pads all fall into the plane-bearing category. If there are no balls, needles, retainers, or races, it 's a plane bearing. In addition
  • Felt Seals
    operating at speeds as high as 4,000 fpm, where shafts are hard and smooth and where ample lubrication is present in the seal. The coefficient of friction averages 0.22 for dry felt against steel and is substantially reduced when felt is presaturated with oil. Felt seals trap abrasive particles

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