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#Post#: 5423--------------------------------------------------
Re: King pins et.al.
DIR By: chrisenamels
Date: February 8, 2022, 11:08 am
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I know it's now a sticky on the Tech Forum, but it's easy enough
to post ny tabulation again, so here goes.
Chris
#Post#: 5424--------------------------------------------------
Re: King pins et.al.
DIR By: jim
Date: February 8, 2022, 12:15 pm
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David i'm not sure if your 3mm c shape axle support will be
thick enough without some side webs. Do you have a pic?
#Post#: 5425--------------------------------------------------
Re: King pins et.al.
DIR By: David F-R
Date: February 8, 2022, 1:14 pm
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--- Quote from: jim link ---
>
> David i'm not sure if your 3mm c shape axle support will be
thick enough without some side webs. Do you have a pic?
>
--- End Quote ---
Quite right Jim. I've upped it to 5mm. No pic as yet - it's all
hanging by a loose thread in my brain.
It will have a web back to the steering arm and I'm considering
a front web on the yoke providing that it doesn't foul the main
axle - I shall know as I build.
Some metal and bearings ordered today - so much for waiting 'til
Autumn. I have lots of off cuts, short ends and other steel from
my loco building (still very active) so plenty to try with.
Chris, I've sorted the bearings, thanks, and ordered some.
#Post#: 5426--------------------------------------------------
Re: King pins et.al.
DIR By: jim
Date: February 8, 2022, 1:50 pm
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The ones im doing i think are similar. I used 1/4 inch and have
put a build up of weld up the back.
#Post#: 5428--------------------------------------------------
Re: King pins et.al.
DIR By: David F-R
Date: February 8, 2022, 4:17 pm
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--- Quote from: jim link ---
>
> The ones im doing i think are similar. I used 1/4 inch and
have put a build up of weld up the back.
>
--- End Quote ---
Those look a lot more elegant than mine will be. Nice to see
them, thanks.
#Post#: 5432--------------------------------------------------
Re: King pins et.al.
DIR By: StefanN
Date: February 9, 2022, 2:16 am
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They look great Jim - like authentic car parts.
Just remembered that I posted a drawing of the Gemini king pin,
in case it’s useful…
HTML http://www.cyclekartsgb.com/build-journals/bugatti-type-37-build/msg1442/#msg1442
#Post#: 5434--------------------------------------------------
Re: King pins et.al.
DIR By: David F-R
Date: February 9, 2022, 2:48 am
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Thanks Stefan. That's very helpful and pretty much what I worked
out, though I'm replacing the top hat bushes with ball bearings
and thrust bearings (as per Gemini karts top of the range front
axle). It will give me something to play with while I finish the
current loco.
#Post#: 5446--------------------------------------------------
Re: King pins et.al.
DIR By: RhysN
Date: February 10, 2022, 8:01 am
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Perhaps these would help?
HTML https://www.okeparts.com/products/complete-pair-diy-stub-axles-for-go-kart-drift-trike-trolley-toylander
#Post#: 5668--------------------------------------------------
Re: King pins et.al.
DIR By: David F-R
Date: March 1, 2022, 7:13 am
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Just starting to make up steering pivot - now modified.
40mm x 5mm yoke, 17mm axle from 25mm bar (more weld area, lower
leverage) with m16 x 1.5 thread (easier than m17 to get dies
for), bearings as above.
Before I commit, I'm planning 16 degree kingpin angle, 18 degree
axle angle, 6 degree positive caster.
I'd value your comments.
Also, is 8mm okay for track rods or are they better at 10mm?
#Post#: 5672--------------------------------------------------
Re: King pins et.al.
DIR By: peterL
Date: March 1, 2022, 4:33 pm
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If it's any comfort, (probably not because I don't know what I'm
doing), I am also using 16 degree kingpin inclination, 6 degrees
castor, and 8mm steering rods, so we are at least in the same
boat!
[attach=1]
I think the geometry is close to what a lot of other karts are
using, so there shouldn't be an issue there. With regards to the
steering rods I just measured those on my trike at 13mm, which
is a Mk1 Escort rack. Given the difference in size and weight I
don't yet see any need to worry about my decision to use 8mm,
though time will tell, it shouldn't be too much trouble to
upgrade to 10mm of there's any sign of bending or stress.
Peter
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