[SEL] semi - ot lock washer questions for engineers

Listerdiesel listerdiesel at gmail.com
Fri Sep 23 12:53:42 PDT 2005


On 9/23/05, Judge Tommy Turner <lcjudge at scrtc.com> wrote:
> Bill,
>
>     I think the split washers had their place but other means have now
> taken their place.  The chemical fasteners like Locktite are probably
> more reliable, cheaper, and faster to use (a guy doesn't have to place a
> lock washer on a bolt and thread it in, the adhesive is adhered to the
> bolt from the manufacturer and once it is screwed it, its "locked").  I
> know that the split washers work as on numerous occasions I've screwed
> out old bolts with lock washers and have "shaved" a cutting of metal off
> the item and the bolt while screwing the bolt out.  No one can tell me
> that hasn't helped keep the bolt from backing out.
>
> Tommy Turner
> Magnolia, KY
>

There a couple of points worth mentioning here:

Split lockwashers come in square or rectangular section, plated or unplated.

We use them extensively on our railroad and other larger chargers to
secure the major components. We always use plated fasteners at all
times, but we also insist on rectangular section lockwashers which
give a larger support area to the nut above and are stronger for a
given bolt size than a square section type.

We also use internal and external shakeproof or 'star' lockwashers on
the smaller stuff, but from 6mm (1/4") upwards we always use the split
type.

We rarely have anything come loose, irrespective of what locking
method we use. Re-use of locking devices does go on, but we have
free-issue fasteners in the workshop so there is little need to try
and use something twice.

Peter
--
Peter A Forbes
Email: listerdiesel at gmail.com
Web: www.oldengine.org/members/diesel




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