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From: Duncan Wood on 2 Aug 2010 14:17 On Mon, 02 Aug 2010 10:16:44 +0100, Dave Baker <Null(a)null.com> wrote: > > "Chris Whelan" <cawhelan(a)prejudicentlworld.com> wrote in message > news:Byv5o.36645$2%2.27183(a)hurricane... >> On Mon, 02 Aug 2010 00:56:42 +0100, T i m wrote: >> >> [...] >> >>> So, do they actually 'lock' in use or would they allow something like >>> said eyebolt to be removed by hand would you think please? I was >>> looking >>> for some resistance to stop them undoing if in the trailer and unused >>> but to be removable by hand if they were in the way. >> >> They work pretty much like a Nyloc. >> >> However, both types of stiffnut are designed as "use once" items, so >> appear totally unsuited to your application. Methinks you need a new >> design! > > Agreed. The Philidas nuts retain some vibration loosening control after a > few uses but eventually any type of Nyloc or similar nut just conforms to > the bolt thread and stops working. If the eyebolts are to be removed and > refitted on a regular basis then just use normal nuts and torque the > eyebolts up properly each time with a stout bar through the eye. A decent > pull on a 1 foot extension bar out of a 1/2" drive socket set will apply > the > required 30/35 foot lbs easily enough. > > Another option is to drill the protuding end of the eyebolts for a cotter > pin or spring pin, fit them loosely and rely on the pin to stop them > coming > right out. Aerotights generally last until they go rusty.
From: T i m on 2 Aug 2010 18:20
On Mon, 02 Aug 2010 22:45:02 +0100, "Duncan Wood" <nntpnews(a)dmx512.co.uk> wrote: > >Bend/weld a bit of metal into the right size U that the nut can't rotate & >weld that in, no spanner needed :-) Pinch it up with a pair of molegrips >after you've fitted the nut. I was thinking about that as well. ;-) I thought of a female hex the same size as the nut, welded to the angle and a retainer over the top to stop the nut falling out ... or just tapping a M10 thread in a little bit of 10mm plate and tacking / bolting [1] that on there. ;-) However, it's quite handy to be able to rotate the nut as then you can set the position of the eye and then nip it up. Or, if I want to make the eye movable it might be easier to let the assembly rotate without the nut undoing. In hindsight I also quite like the simplicity / flexibility of using a std nut / bolt assembly. Easier for field repairs or mods etc. Cheers, T i m [1] Using two countersunk machine screws from the top of the angle before fitting it to the trailer. |