Wow, what an INCREDIBLE year! Thank you all so very much for subscribing, liking, and generally being an awesome audience.
Thank you for choosing to be a part of the channel, thank you for telling your friends about it, and thank you most of all for your wonderful, supportive comments. I feel so fortunate to have you on board, and I want you to know how much your support means to me.
So I’d like to give away this “Impossible Dovetail” puzzle as a gift to a lucky viewer. It’s a great little desktop toy, and I had an absolute blast making it.
Just leave me a comment below, and on the 16th of January 2016, I’ll use this webpage:
— http://www.sandracires.com/en/client/youtube/random.htm —
to randomly select a viewer as the winner. The contest is international, and I will ship the puzzle to you wherever you are in the world, free of charge.
Again, thank you for your support and enthusiasm, be safe over the holiday season, and I look forward to having you all back here in the New Year for an even bigger 2016.
Cheers,
Chris.
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Jack Houweling’s YouTube Channel: https://www.youtube.com/channel/UCFH2LKIvcLPhGgDO-QKZlmA
Spare Parts #11 – Making A 4 Flute Light Duty Dovetail Cutter: https://youtu.be/zQaIZtDWMsw
Plans for this project: http://www.clickspringprojects.com/store.html
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Abbreviated Transcript:
00:07 In this video I machine my version of the “Impossible” Dovetail. This is a popular woodworking project, that I learned about from watching Jack Houweling on his YouTube channel.
01:06 One of the key things required for the project to succeed, is that the parts be able to fit together regardless of how they’re oriented when they go back together. For that to occur, its critical that the initial stock be perfectly square,
01:46 A quick check over at the other corner confirmed the alignment of the spindle, and then I made a start on removing the bulk of the waste stock. Now the way I’m choosing to tackle this project means that it hinges on the availability of a narrow taper dovetail cutter to remove the rest of the stock.
02:30 There’s a lot of contact with the work piece, and it’s both conventional and climb milling at the same time, which is far from ideal. But it did a great job, and had no trouble cutting through the soft aluminium, in fact it took out most of the waste stock in a single pass.
02:47 One small negative was the little burr at the top which suggests its rubbing rather than cutting at the very top of the cutter. But other than that, the rest of the cut was quite good, and a quick clean up pass on each side, left an excellent surface finish.
03:41 Although whilst the dovetail cutter had no problem with the aluminium, it really did struggle with this brass. I had to reduce the feed rate significantly, or risk overheating the cutter, which meant this part of the job took much longer than I would have liked. In fact if I was to do the project again, I’d probably make both top and bottom from aluminium
04:11 The walls of the cut were ok, but the bottom surface was a bit ordinary, and nowhere near as clean as the aluminium. In any case, the end result was adequate for the project, and the two major pieces came together quite nicely.
04:3 The burr on the brass piece was making the fit a little tight, so again some 120 grit paper sorted that out, and the fit was much improved. Both pieces have some rather sharp edges left over from the milling,
06:26 Once the diameter was sorted, I parted off and then used these gravers to form the dome section on the other end. The final piece to make is the stand, which I started by roughed out the basic shape on the scroll saw.
07:36 And once it was close to the line, I fixed it to this super glue pallet, and them milled out the fold lines, much like I did in the rectangular bluing tray video.
07:45 Its a bit of extra work, but its a very convenient way to get small shapes into position for soldering, that might otherwise be difficult to hold in place as they’re heated. Now the brass sheet is supplied with a hard temper, so its already work hardened.
08:16 Once its formed into shape, I’ll fill the joins with some of this soft solder. I should mention though: it’s a one shot bend, brass work hardens very quickly.
09:11 A little bit of final surface finishing, and that’s the stand complete. Brass does pick up fingerprints and tarnish quite quickly when its handled, so the very last step of the project is to put on a thin coat of lacquer
Machining The “Impossible Dovetail” Puzzle, by Clickspring.