Lmfalen Posted October 23, 2018 Share Posted October 23, 2018 I"m interested in how these were forged, and was hoping that someone could fill me in on the process or refer me to something that details their creation. If you think this would be better posted somewhere else, please let me know. Thank you. Quote Link to comment Share on other sites More sharing options...
Glenn Posted October 23, 2018 Share Posted October 23, 2018 Better photos and more detailed information on the use and size of this tool would be helpful. Where in the world is this located or used would also help. Quote Link to comment Share on other sites More sharing options...
Daswulf Posted October 23, 2018 Share Posted October 23, 2018 Looks like the bit used in this rifle making video? Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted October 23, 2018 Share Posted October 23, 2018 Looks more like a tap than a drill bit. Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 23, 2018 Share Posted October 23, 2018 If it is the bit from the Colonial Gunsmith video, then it’s less a drill bit (and even less a tap) and more of a reamer, designed to take the rough-forged axial hole of the barrel and turn it into a smooth, straight bore. Quote Link to comment Share on other sites More sharing options...
Lmfalen Posted October 23, 2018 Author Share Posted October 23, 2018 Daswulf - it is the bit used in that video JHCC - How would I go about making on of them? I heard that the heat treat and metal type are the same as making a small chisel, but thats about the extent of my knowledge on the subject Quote Link to comment Share on other sites More sharing options...
JHCC Posted October 23, 2018 Share Posted October 23, 2018 Lmfalen, welcome to IFI. If you haven’t yet, please READ THIS FIRST!!! Quote Link to comment Share on other sites More sharing options...
Daswulf Posted October 23, 2018 Share Posted October 23, 2018 Sorry I can't help much on the how. I just recognized the photo from that awesome video. I can think of some possible ways but they would certainly not be from experience making any cutters like this so I'd rather not throw out speculation that might be very wrong. I am interested to hear what others might know. Someone may be along to help with the How to, or offer up a book reference. Quote Link to comment Share on other sites More sharing options...
Frosty Posted October 23, 2018 Share Posted October 23, 2018 Welcome aboard, glad to have you. If you'll put your general location in the header you might be surprised how many of the gang live within visiting distance. Watching the video where he's boring the barrel he talks about breaking bits and how he makes them in general. By the looks where he shows the broken bit and the newly made one they look to be round stock forged flat and twisted. As stated he files the relief and taper before heat treating. It should be enough to do a little experimenting. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
Lmfalen Posted October 24, 2018 Author Share Posted October 24, 2018 Frosty, JHCC, Daswulf - Thanks for the help fellas, I'll go head and experiment and see what I can come up with. Quote Link to comment Share on other sites More sharing options...
VaughnT Posted December 1, 2018 Share Posted December 1, 2018 That's a reamer, not a drill bit. The trick is that there's a keyway cut into the end. The key is good high-carbon steel with a nice sharp edge/corner just like you'd want on a lathe tool. To increase the cut after every pass, you place a shim of paper under the key to raise it up a hair. It takes a lot of oil and a lot of passes to get your bore sized right and smoothed out. Then it's on to the rifling! Quote Link to comment Share on other sites More sharing options...
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