Quote:
Originally Posted by Mart
Not used them, but have seen them reviewed on Youtube. The problem is you need to go fast for the drill and slow for the tap. I think they are ok in relatively thin metal. For example, how can you countersink a hole if the tap is still cutting threads?
Probably great for some specific purpose, but not great in a lot of cases.
Just what I saw and no reason not to agree.
Mart.
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Mart if I read this correctly, there is a drill tap and a counter bore on top, all
in one, so its only one operation used with a reversible automatic tapping
head. It works like this a mill or drill press you set the depth of countersink
or counter bore then lock the quill stop when the quill hits the stop the tapping
head instantly reverses. again this is for production. So for most here go for
drill and tap & tooling change to countersink or counter bore. Hope I wrote
this understandable I'm a do'er not story writer like John boy Walton LOL
sam