Bigswey Posted March 22, 2010 Share Posted March 22, 2010 I am wanting to make a nut cracker using a lead screw. Does anyone know how to forge a lead screw nut? Lead would be something like 0.5 inches, major diameter something like 3/8 inch..Buying one is not an option for me .... yet, more fun to try and make one . thanks folks any help appreciated Quote Link to comment Share on other sites More sharing options...
John B Posted March 22, 2010 Share Posted March 22, 2010 I am wanting to make a nut cracker using a lead screw. Does anyone know how to forge a lead screw nut? Lead would be something like 0.5 inches, major diameter something like 3/8 inch..Buying one is not an option for me .... yet, more fun to try and make one . thanks folks any help appreciated Hi, You Don't say what nuts you want to crack, pea or coco ? That seems an odd choice of pitch to screw diameter ratio for a mechanical screw, (more like an archimedian type which I don't think would be appropriate for nut crackers,) if my understanding of thread nomenclature is correct, I can see a couple of options here, Cast a nut in bronze to your 'screw' or alternatively for a complete forged look, Construct the frame to incorporate a section like a courting candle holder, and use the raising and lowering bar on the inside candle support as a handle to give leverage to crack a nut. Then again you could construct it like the suggestions for renewing post vice screws if you search the site. Or you could change tack and think about going down the tongs or toggle press basis. Good luck with the project. Quote Link to comment Share on other sites More sharing options...
Nakedanvil - Grant Sarver Posted March 23, 2010 Share Posted March 23, 2010 Be better if we had more information. Are you making the screw? Pretty small diameter for a high lead. On leads that are greater than the diameter you usually need multi-start threads. If you have an extra piece of threaded rod you could forge the nut in two pieces. Quote Link to comment Share on other sites More sharing options...
Sukellos Posted March 25, 2010 Share Posted March 25, 2010 Anvilmag.com had a great article on restoring leg vises that talks about rebuilding the female thread inside of the vise. Unfortunately, they appear to have exceeded their bandwidth allowance and you can't get to the page now. Basically the method is to forge a piece of small stock so that it just fits into the thread. Wrap that into the male thread and then screw it off of the end and braze it to the inside of a cylinder to make the female nut. You might also try to forge a strip of stock into the male threads so that the outer edges just touch each other above the thread and weld them into one piece. Arc welding (Yeah, I know. Curse me for even suggesting it! ) would minimize the risk of deforming the threads at welding. Quote Link to comment Share on other sites More sharing options...
Bigswey Posted March 25, 2010 Author Share Posted March 25, 2010 great inputs.Thanks much I'll give the wrap and braze method a try.. Quote Link to comment Share on other sites More sharing options...
Sukellos Posted April 7, 2010 Share Posted April 7, 2010 I hope you got the Tuesday night (April 6th) Blueprint. It shows how to build that threaded nut. If not, here's the link.http://iforgeiron.com/images/tuesday/60/BP0060.htm Quote Link to comment Share on other sites More sharing options...
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