We braze in a TXV on a refrigeration evaporator.
Attention: Do not try any of what you see in this video at home. It takes at least two years of HVACR schooling to become qualified to learn in the field how to work on heating and air conditioning equipment. Then it takes another three years of apprenticeship training to become competent enough to safely work on heating and air conditioning equipment.
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Roll threading is a very efficient method of manufacturing threads on bolts and other fasteners. Learn the benefits and limitations of this popular technique from one of the experts at Portland Bolt: Kailey Tillman.