Re: (ET) Disconnect maintenance on BB600 Elec-trak

[Jim Coate <lists freerangeelectric com>]

"double bolt" it? perhaps this means use two nuts - I'd still want a 
lock washer in there.

Actual copper would be too soft for a lock washer, bolt or nut. I use 
silicon-bronze split washers as a compatible conductive material on 
things like the disconnect (which could appear "discolored" as compared 
to the brass nuts?). Can arguably use typical zinc-plated lock washer as 
a somewhat similar metal to the lugs.

The ideal choice can get tricky as choice of materials/plating vs 
available styles can complicate things. I do like the wavy washers for 
low torque studs on PbA batteries which may creep out of the lead over 
time.


On 02/25/2019 4:19 pm, Chris Zach wrote:
> I'll let this be an experiment. If it fails I'll get copper lock
> washers for maximum conductivity. Or another copper bolt and double
> bolt it.
>
> On 2/25/2019 4:24 PM, David Roden wrote:
> > On 25 Feb 2019 at 12:47, Chris Zach wrote:
> >
> > > Since the lock washer was also discolored I dispensed with it and 
> > > just
> > > tightened the brass bolt hard.
> >
> > You really don't want to dispense with lock washers on a vehicle that 
> > jolts
> > and vibrates.  You'll be back in the same place before long.
> >
> > Smart EV folks use lock washers on bolted connections.  I'll use split
> > washers in a pinch, but my preference is for either Bellville (dished)
> > washers or wave washers.  I keep a supply of them on hand in the sizes 
> > I'm
> > most likely to need.
> >
> >
> > David Roden - Akron, Ohio, USA
> >
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--
Jim Coate
www.FreeRangeElectric.com
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