[SEL] semi - ot lock washer questions for engineers

[Richard Strobel]

Bill..Huey helicopters do not use any lockwashers..well maybe on the circuit 
breakers and small stuff

So I don't either

RickinMt.


----- Original Message ----- 
From: "Curt" <curt at imc-group.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Friday, September 23, 2005 12:37 PM
Subject: Re: [SEL] semi - ot lock washer questions for engineers


> Bill,
> Oh here we go again! Sometime back I made the statement that lockwashers
> were indeed useless devices. Several flame making devices were aimed my
> way. But reading any good engineering text on bolted connections will
> quicky show that they really are not needed for properly sized and
> torqued bolted connections. Hardened flat washers in conjunction with
> correct nuts and proper preload is as good as it gets.
>
> In the connections that works loose and are rattling around there is
> probably some merit to using lockwashers however.
>
> Part of the reason I was flamed so badly was my bold statement that the
> rounded edge of square nuts should go against the part being clamped.
> That debate has raged on a while and I remained convinced that there is
> merit to this method. One reason lock washers may have become so popular
> is that when using square nuts to bolt structural steel together, the
> square nuts will dig into the steel making tight connections difficult.
> By putting a small OD lockwasher under it this keeps the corners from
> digging in. However, by turning the nut over and putting the rounded
> side down, then you don't need the usless lockwasher anyway.
>
> I could try and dig up the washer info if you like. For now I'm prepared
> with Nomex suit on :-)
> Curt Holland
> Gastonia, NC
> P.S. Use Loctite or ESNA nuts if you want secure non-high strength
> bolted connections.
>
> bill at antique-engines.com wrote:
>
> >Debate flaming on in some forums:
> >"Split-type lockwashers" good, bad, worthless or worthwhile?
> >Some claim they are worthless and modern farm machinary, autos, engines
> >and other equipment don't use them because they are worthless (not due to
> >cost savings)
> >
> >Others claim it's due to cost savings.
> >
> >Are they worth using, do they do any good?
> >If so, what applications do they work in, which do they not work in?
> >Can you support or back up your claims?
> >
> >I've always used them and can't say they do any harm, but I also can't 
> >say
> >it would work just as well without them because I haven't done
> >side-by-side experiments.
> >
> >Bill
> >Runnells, IA
> >(where things may be coming apart due to lack of lockwashers?)
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> >
> >
> >
> >
>
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