Danny Fenton Posted August 5, 2011 Share Posted August 5, 2011 I Have been surfing the tinterweb looking for high tensile bolts to use as undercarriage axles.Ideally I want a 4mm diameter by 40mm shaft with the last say 5/10mm threaded to take an M4 nut.I can find machine screws that are threaded over the full length, but I think an unthreaded bolt will be stronger. this is the sort of thing, but I will cut the head off and use it the other way around, the bolt is the important bit. Any thoughts? I have tried the usual haunts...... CheersDanny Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted August 5, 2011 Share Posted August 5, 2011 Are any of these suitable? Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted August 5, 2011 Author Share Posted August 5, 2011 Hi Martin, I checked modelfixings as well but those you point out actually under further inspection would work. 20mm threaded, 70mm unthreaded.Thanks Quote Link to comment Share on other sites More sharing options...
Malcolm Fisher Posted August 5, 2011 Share Posted August 5, 2011 The bolt you picture is better than a machine screw for an axle as the plain shaft will be a better fit in the wheel and cause less wear in the hub than a screw thread. I have used them tapped into an U/C leg with a locking nut between the leg and the wheel to act as a spacer as well as making sure that the bolt doesn't unscrew. The Allen cap head makes a good wheel collet and can't come off Malcolm Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted August 5, 2011 Author Share Posted August 5, 2011 Exactly why I wanted a bolt rather than a screw Malcolm I hadn't thought to compare bolt length with thread length. I have just ordered 10 pairs of 70mm x 4mm with only 20mm threaded. I have flanged bearings to fit to the wheels that are 4mm internal. I also have some nice castellated nuts to hold the wheels on. Look quite scale on my Spitty. I am firm believer that if the wheels spin true and freely it helps with a warbird....... Thanks chapsDannyEdited By Danny Fenton on 05/08/2011 20:17:44 Quote Link to comment Share on other sites More sharing options...
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