Hunterbow Smithy Posted May 2, 2015 Share Posted May 2, 2015 My daughter (11) and I made this cork screw from a RR spike we found one day while out walking. It is a preliminary design; forming the worm was a lot more difficult than I thought it would be. Quote Link to comment Share on other sites More sharing options...
Roastbeef Posted May 2, 2015 Share Posted May 2, 2015 Really nice work, bravo! Quote Link to comment Share on other sites More sharing options...
njanvilman Posted May 2, 2015 Share Posted May 2, 2015 Start them when they are young. Nice work. Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted May 2, 2015 Share Posted May 2, 2015 How well does it work?I like the design. Quote Link to comment Share on other sites More sharing options...
ianinsa Posted May 2, 2015 Share Posted May 2, 2015 Neat, a gift for someone special? Grandparents love that sort of gift Quote Link to comment Share on other sites More sharing options...
stan Posted May 2, 2015 Share Posted May 2, 2015 Never seen that before, nice job Quote Link to comment Share on other sites More sharing options...
Alan Evans Posted May 2, 2015 Share Posted May 2, 2015 Nice practical form, well done.I had problems with my first one. It did not work too well because the helix was not regular and it tended to jam in and tear at the cork. I found the best way to achieve the even spacing was to roll it round tight together, so all the turns were touching, and then open it up by tapping it on to the hardie / hot set. Holding it at the angle of the spiral and rotating it as I tapped.Alan Quote Link to comment Share on other sites More sharing options...
BIGGUNDOCTOR Posted May 3, 2015 Share Posted May 3, 2015 (edited) I was thinking if I do one it may work to wrap it around a suitable lag screw for wood, or turn a grooved mandrel on the lathe. Edited May 3, 2015 by BIGGUNDOCTOR Quote Link to comment Share on other sites More sharing options...
Alan Evans Posted May 3, 2015 Share Posted May 3, 2015 I was thinking if I do one it may work to wrap it around a suitable lag screw for wood, or turn a grooved mandrel on the lathe. Too simple! Where is the fun in that? Actually maybe not so simple... the immediate problem is removal from the mandrel, as long as you can "unwind" it off that it would be fine. You would need to end up with the handle end of the corkscrew at the head end of the bolt. It is always a problem getting a hot-wound spiral off even a plain mandrel unless you can "uncoil" it to open up and reduce the friction of the tightening effect. A secondary problem is that the coach screw (lag screw) thread is a bit too fine for a cork screw. Have a look at and measure your favourite, easy to use one, you would probably have to open it up to a coarser pitch by tapping it on to the hardie anyway. If you used a plain smooth mandrel it is not too difficult to set the pitch by the angle the wire approaches the axis, especially if you can rotate the mandrel in a lathe or similar.If I was doing another I would probably make up a pitch-setting former to hold in the vice to use instead of a hardie, from say a 5mm (3/16") flat and put a progressively changing wedge edge on it. Thin and sharp to open up the spiral and soft rounded to set the final pitch.Back to the fun, it is also not that difficult to get it close enough by eye once you have the rotating-across-the-hardie technique though. There is a certain perverse pleasure in managing to do it all with just a hand hammer and rolling up the initial spiral-formed-tube freehand on the anvil... using the properties of the material to initially form the spiral against itself, using the previous turn as a guide...and then the the opening up of the pitch of the self-regulated spiral without losing the circular form just by the using the easy bending sideways twist of the series of jump rings…if you follow my analogy.Happy Sunday...Alan Quote Link to comment Share on other sites More sharing options...
neg Posted May 3, 2015 Share Posted May 3, 2015 (edited) I've never had any trouble forming them on the anvil without a mandrel. Just make a bend and start rolling it. Your corkscrew looks great, though. Haven't seen one done like that before. :) Edited May 3, 2015 by neg Quote Link to comment Share on other sites More sharing options...
MRobb Posted May 13, 2015 Share Posted May 13, 2015 Really nice design. I like it! Quote Link to comment Share on other sites More sharing options...
Glenn Posted May 13, 2015 Share Posted May 13, 2015 That is an interesting use of a RR spike. Quote Link to comment Share on other sites More sharing options...
SJS Posted May 13, 2015 Share Posted May 13, 2015 I like what Alan said. I also like problems I can solve with a hammer, I'm good with a hammer;-) Quote Link to comment Share on other sites More sharing options...
Dogsoldat Posted May 13, 2015 Share Posted May 13, 2015 It's very neat! If you open the loop up just a touch you would have a bottle opener on that end as well. Quote Link to comment Share on other sites More sharing options...
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