Propane will absolutely not be hot enough. You need the heat of oxyacetylene, with a medium sized tip. That way you can get the metal hot quick and start blowing it out immediately. Taps are a little harder to blow out due to their composition, but you can still do it no problem. If you have something broke off flush near the top of the hole (not in your case) its best to hold the tip of the torch at an angle to what you are blowing out so the slag goes away from you and the tip, obviously as you go deeper you have the torch more straight up and down so you don't gouge the sides (more of a problem with steel). If you're torch doesn't start melting the object within a few seconds, or have been burning it out for a bit and the tip starts popping, pull it back for a bit and let the tip cool, that popping is the gas trying to burn inside the tip, and if you go too long it will ruin your tip. If you had a bunch of holes you will usually ruin a tip by the time you're done anyway. Sometimes with a tap, if you use a pin punch you can chip away at the edges of the tap until it is broken up, sometimes easier after you have heated it. When blowing out holes, the threads are usually clearly defined by the temp difference between the two. Most of the ones I had to do were laying on my back under the machine, blind holes, in steel, which you have to be more careful not to gouge the threads. Bigger fasteners, say 3/4 and bigger, you can usually split the broken piece right across the middle and take the middle 1/3 out and knock the two halves in.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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