Torque wrench head

One method cuts the head from a wrench and welds it onto a plug or stay. A two-piece head that was welded together is fast to make and the cost of creating that head can be relatively inexpensive. We are not saying that the two-piece welded heads are bad and should not be used because that is not true. What is true is that with the cut and weld approach comes a number of questions that must be asked to determine if this approach is right for you: Do the types of metal used in the head and the plug match? Is the surface where the head and the plug meet large enough to withstand the amount of stress being placed on the weld? Was the weld done correctly or are there imperfections and fissures that damage the structural integrity of the piece? How was weld quality determined? Did they Magna flux, Xray, or just visual inspection? Will all the heads fit on all of the wrenches or must I buy multiple wrenches and heads to cover different fastener sizes within the same torque range? Were both pieces of metal heat treated? If so were they both heat-treated in identical ways and at an identical place in the manufacturing sequence? Were the separate pieces stress relieved? If so, how far into each piece? What type of welding was used to create the head? Are the welded pieces straight? Is a common centerline maintained across all cut and weld heads? What is the likelihood of the piece snapping or breaking? How much backup stock will I have to inventory and control? When it breaks, what is the cost of injury and equipment loss?