I stumbled on these taps in a set of vintage taps. GTD 7/8-32 5-p LH Fin. It has a tapered rod with an adjusting nut (I assume to be variable over-sizing)
SW Card 7/8-32 USF L
In what application would 7/8-32 LH be used? Is the finishing tap for adjusting specific over-sizing? Are these "off the shelf" or completely custom? I don't think these have ever been used as they were covered in protective grease. The full size cards even had old cloth wrapper. The GTD is easily the coolest tap I have seen, I just don't know what the hell they're for, fine adjusting mechanism.
Thanks in advance, Rick
SW Card 7/8-32 USF L
In what application would 7/8-32 LH be used? Is the finishing tap for adjusting specific over-sizing? Are these "off the shelf" or completely custom? I don't think these have ever been used as they were covered in protective grease. The full size cards even had old cloth wrapper. The GTD is easily the coolest tap I have seen, I just don't know what the hell they're for, fine adjusting mechanism.
Thanks in advance, Rick