I bought the lisle set years ago; I did not know that Napa carried them also.
I didn't know about them until I started my current job. Picked up the Lisle set for $30 shipped from eBay.
Craziest thing I've seen is everyone at work throws them on a cordless impact and taps a hole in a couple of seconds. It works surprisingly well. Would never do it with any taps I bought out of pocket, but when work provides them as expendables, why not? (Well, besides the chance of breaking off...)
I got a call one day from a friend of mine one day about a coworker of his that had chased a blind hole in a tractor transmission with a tap on an impact, using one of these. It ended poorly. He wanted to know if I had any input on how to get the tap out, being that I'm a machinist. I offered what I could. The case ended up at a machine shop...
I was getting close to buying the $140.00 ( ??? ) set from Snap-On.
Now thanks to this place I have the $27.00 set from Amazon on my wish list.
I would never do it on anything of my own, or on a repair job I'm doing on the side (or at pretty much any other job). My current work is in manufacturing heavy equipment, and the boss wants everyone to do it that way.
I'm weary of it, have a thread repair kit for damaged threads, and won't run them down blind holes. I'm not interested in buying an expensive Tap Extractor set anytime soon.![]()
I was getting close to buying the $140.00 ( ??? ) set from Snap-On.
Now thanks to this place I have the $27.00 set from Amazon on my wish list.
Like anything else to do with fabrication and repairing machinery, power tapping is not idiot-proof. Having said that, I've tapped thousands of holes with an electric impact without breaking a tap in a blind hole. That was just operator error. Also, this is not the place to use that mega-super-earthquake-tsunami-1000#/ft air gun.
jack vines
Snap-on has a 2 piece tap socket for 49 ATSSET is part number thought it would give me more flexibility than different sockets.
nobody knows?