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#Post#: 1355--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: Ukrobotman
Date: September 3, 2019, 5:37 pm
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I had my rear axle move a bit, this caused the chain wheel to be
out of allinment so chain came off ..twice. Investigated more
thouraghly to find why axle had moved and found bolts had
undone. On the end of my axle I’d drilled and tapped so I could
thread on a 6 mm bolt with a big washer to stop wheels coming
off. I found on on side this was off so a potential for wheel to
come off
Not very proud of this.
Not sure how reliable locktite or spring washers are
#Post#: 1356--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: M.Z.Nahajski
Date: September 4, 2019, 1:50 am
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about track Marshalls. there are plenty of us standing around
when others are driving so we just need to spread out around the
track so that we can help. This also would give us some
variation when watching so thats a win win ;)
#Post#: 1357--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: RhysN
Date: September 4, 2019, 4:54 am
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Further to Bill's comments about checking previous shortcomings.
Putting on my motorsport hat, every car there has a logbook in
which things are noted. If something is a bit "not quite as it
should be" like an advisory on an MOT then the car can run, this
time, but needs to be rectified for the next. More major things
must be fixed and rechecked before running.
Now I know this may sound a bit OTT, but when (not if) we get to
20+ CKs running perhaps a logbook should be already in place.
Nice record for the car too in the future.
#Post#: 1358--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: RhysN
Date: September 4, 2019, 5:26 am
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--- Quote from: StefanN link ---
>
> Anyone got any experience of Nord-lock washers?
>
--- End Quote ---
Yes, but almost impossible in a situation where you want to
reuse. Then again nylocks are only supposed to be ideal for a
one time use!
#Post#: 1359--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: TheGiantTribble
Date: September 4, 2019, 5:56 am
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I like the sound of a 'Log book', as you say a nice record of
the car if nothing else.
#Post#: 1360--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: StefanN
Date: September 4, 2019, 6:13 am
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Nord Lock sell the ability to undo and reuse their washers as a
major design feature. Are you able to give any specifics of
when/where you have used them and the specific difficulties?
It'll make it easier to understand the context of your
experience and how it applies to any uses someone else might
have.
Thanks
--- Quote from: RhysN link ---
>
> [quote author=StefanN link=topic=208.msg1349#msg1349
date=1567510053]
> Anyone got any experience of Nord-lock washers?
>
--- End Quote ---
Yes, but almost impossible in a situation where you want to
reuse. Then again nylocks are only supposed to be ideal for a
one time use!
[/quote]
#Post#: 1362--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: RhysN
Date: September 4, 2019, 9:21 am
---------------------------------------------------------
--- Quote from: StefanN link ---
>
> Nord Lock sell the ability to undo and reuse their washers as
a major design feature. Are you able to give any specifics of
when/where you have used them and the specific difficulties?
It'll make it easier to understand the context of your
experience and how it applies to any uses someone else might
have.
> Thanks
>
> [quote author=RhysN link=topic=208.msg1358#msg1358
date=1567592761]
> [quote author=StefanN link=topic=208.msg1349#msg1349
date=1567510053]
> Anyone got any experience of Nord-lock washers?
>
--- End Quote ---
We used them for the fastenings on Tensile fabric canopies
(think of the fancy "tent" where you wait to go over Nelson's
Victory which I erected) where potential "flogging" of the
fabric easily vibrated nuts off. As the structures often needed
to be moved to different venues they had to be undone, and that
created our difficulty. It was some years back (8 or 10) perhaps
they have changed a bit in the time.
Yes, but almost impossible in a situation where you want to
reuse. Then again nylocks are only supposed to be ideal for a
one time use!
[/quote]
[/quote]
#Post#: 1363--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: Ukrobotman
Date: September 4, 2019, 10:36 am
---------------------------------------------------------
I did not know anything about nord lock washers. Not sure how
much better they are than a standard spring washer.
I think a combination of these, spring washers and Locknut/ nail
varnish is probably the way to go.
I wasn’t aware that nylocks are only intended for single use
😳
#Post#: 1364--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: RhysN
Date: September 4, 2019, 12:31 pm
---------------------------------------------------------
There is no question in my mind that Nord Lock are better than a
standard spring washer. If you look at the website it states
that they must be used under the head of the bolt as well as
under the nut! I just found them difficult to re-use. Industry
suggests that a star type spring washer is better than the
single cut versions too.
Nylocs are intended for limited re-use more than single, except
in critical places where they are single use (you won't find
them on an aircraft if that's any hint).
I wonder if the variety of bolt choice we tend to use isn't
helping, if you think automotive they are generally fine thread,
rather than the standard engineering variety.
There is certainly something a bit strange as many vehicles have
much rougher treatment than a number of laps on a tarmac
circuit, and they don't have bolts coming loose so frequently.
#Post#: 1365--------------------------------------------------
Re: Lessons Learned - Safety
DIR By: ChrisS
Date: September 4, 2019, 1:59 pm
---------------------------------------------------------
Do the log books have a standard format?
--- Quote from: RhysN link ---
>
> Further to Bill's comments about checking previous
shortcomings. Putting on my motorsport hat, every car there has
a logbook in which things are noted. If something is a bit "not
quite as it should be" like an advisory on an MOT then the car
can run, this time, but needs to be rectified for the next. More
major things must be fixed and rechecked before running.
> Now I know this may sound a bit OTT, but when (not if) we get
to 20+ CKs running perhaps a logbook should be already in place.
Nice record for the car too in the future.
>
--- End Quote ---
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