Posted by denny k on March 28, 2020 at 17:56:37 from (64.179.183.167):
Saw Jan's post on ventilators. Neat, sometime it is fun to doodle. Local Black Hills news had a report on a medical Dr. and a Dentist in Missoula Mt. that designed and helped build masks that can be reused. Their mask that can be produced with a 3-d printer and uses a small replaceable filter. The mask can be easily sanitized. The video had a number of 3-d printers making them. Now the South Dakota School of Mines in Rapid City has started making them also.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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