wait...

are you asking round or square tube for the actual "holes" in the rockers??

use round here 100%... square won't work if you are jacking up one end of the car...

for the stand itself...see my post above

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Chris

bump, I want to start working on this over the next few weeks...pls check my design/material selection!?


Design...I'm basically going to copy these guys:
http://www.motorsport-tools.com/images/Lluniau/k%20606.jpg

For the sill:
11 gauge support plates
1 OD x .065 wall x .870 ID 1020 DOM Structural Round Steel Tube


For the Jack stands:
.75"OD 1020 DOM solid bar

'Support' (2" long, solid bar inserted/welded into support, which is welded to top of stand)
1 OD x .120 wall x .760 ID 1020 DOM Structural Round Steel Tube


for the stand and lower cross-bar support:
1-1/8 OD x .065 wall x .995 ID 1020 DOM Structural Round Steel Tube


23" high, 16" base. I'll probably put in the gussett too, but no fancy 'dish'.

thx.


oh, I was looking at ordering from these guys just cause its pretty simple:
http://www.metalsdepot.com/index.phtml?aident=

but all materials, with shipping comes to $176......errrgh. I have zero clue on local metal supply shops...maybe Tim or Albert can suggest something in NorCal?

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Jon Burke - KI6LSW
Blog: http://psgrallywrx.blogspot.com/



Edited 4 time(s). Last edit at 02/08/2009 10:26PM by Jon Burke.

Jon Burke Wrote:
-------------------------------------------------------
> bump, I want to start working on this over the
> next few weeks...pls check my design/material
> selection!?
>
>
> Design...I'm basically going to copy these guys:

>
>

Basically the exact same set-up that VW used for their Dakar cars.



Supposedly they also put a moderately powerful magnet on the inside opposite the little tray so that important bits and bolts could be placed somewhere safe while under the vehicle without having to reach around to drop them in the tray.

Very simple but a very nice bit of kit...

Just get 4 of these and stick them to each stand:
http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=90566

Carl S Wrote:
-------------------------------------------------------
> Just get 4 of these and stick them to each
> stand:
>


I was thinking more along the lines of: http://www.mcmaster.com/#5775k21/=iz7uf

But the dishes might be more practical...

Jon Burke Wrote:
-------------------------------------------------------
> but all materials, with shipping comes to
> $176......errrgh. I have zero clue on local metal
> supply shops...maybe Tim or Albert can suggest
> something in NorCal?

Try Naylor Steel Co. in Hayward. http://www.naylorsteel.com/

On a thin sheet metal Subarat, for the pin stands (well the sockets at least) my driver tried the intall where you drill through the rocker and slide the tubes through then weld reinforcement plates on either side. The rockers flexed when he did this. It's less apparent if you use the proper stands - we don't - so we could see the flex. We use the sockets in the car with rods in them and then 'regular' jack-stands under the rods. Because the rods and the jackstands are not connected we could see the rocker flex as we lowered the shell - picture a teeder-todder (I think that's how you spell it). Again that's masked with the proper stands. What he did instead was cut two slits laterally into the rocker and 'peeled' it open - that was after drilling the initial hole - then he welded two vertical braces under the tube, to the rocker and 'wrapped' the rocker back up and welded up the two slits... I hope that made sense. Again, very easy to tell if your design is sturdy by just using the rod on a regular jackstand and watching for flex...






Edited 2 time(s). Last edit at 02/09/2009 03:20PM by Daniel Buehler.

thanks for the help all.


so no one foresees a problem with my dimensions/thickness of the tubing I'm using for these?

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Jon Burke - KI6LSW
Blog: http://psgrallywrx.blogspot.com/

I didn't read all the copy here but I did see your plea for material guidence. You can use either square or round in this application. a lot of DYi's use square for the above mentioned reasons. The lateral strength is comparable, square is weaker torsionally but not an issue here. I personally would use round for the following reason

round tube is a bit cheaper in quantity

I have several machines designed to work with round material

you can use round on a car and no one will laugh at you (square tube is for garden fences)

I can weld 250 degrees of a round tube joint in one pass in ten seconds

round tube is lighter, while the parts are not being raced, I see no reason ever to make parts more expensive. Materials are purchased and transported by weight.

I drilled all the way through the sills on the HCC (hill climb cabby) and used 1-1/4" .095 wall tube through the body. The sills are massive on that car. I went trough near the bottom to also serve as a water drain.

I then used 1" (25mm) diameter 1018-1020 (mild steel cold rolled) for the pin. I drilled a hole though the end of the pin to fit a padlock once the stands have been fitted to the car.

I would disregard the extra leg at the bottom and gusset the pin to the triangle with corner gussets.

I would also supply these with safety orange powdercoat so they would be easy to find in the mud.

I also made a disposable jack with a swivel on the pin so I can use it to get unstuck then eject the jack once the car is moving without getting out (in theory)

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www.frankthewelder.com
www.sinisterbikes.com
learning the ropes by wrapping them around my neck

I take "pro" to mean that the atheletes are professional. Getting $500 bucks back out of a hobby that costs you $100,000 wouldn't cut it for me. Getting $50,000 in sponsorship, then spending $80,000 on racing, that's a great guy with great connections going racing. Is he a pro? ehhhhhh....

Ending up the season with more in your pocket than you started with, there's no question that's professional.

John, I think part of the issue stems from the dilution of the word... lots of people think of "pro skateboarders"... who get a couple free hats and a free deck from the local skate shop. The hype _does_ sound better though when you can announce that all the pros are coming.

Cheers,
Anders

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Grassroots rally. It's what I think about.

Actually Anders, that's still considered amateur in skateboarding. Your a skateboarder until you get free product. Then your an amateur until you're actually getting paid. But even amateurs get some cool perks, like free vacations and such. I was an am and ironically got free shoes from DC (one pair per month), free decks, and the local shop gave me a discount on stuff and paid all our expenses to travel around Wyoming and Colorado and go skateboard. We're actually talking about doing a reunion video/photo shoot to give to the shop owner. We were his first 'team' and now it's pretty successful and has given him the edge over other skateboard shops in the area as all the local young guns all frequent his shop in the hopes of being on the team some day.

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Grant Hughes