Ok here we go...PMF!

[dales133]

Cant believe i didnt do this in the first place.
Id already got the bearings but put it in the too hard basket.
Waiting for the proper bolts to arive but thats basicly it

[Sheddie]

Looking good
How about I throw another idea into the thought process
If you are worried about having to get at the bearings at a future time, what about reversing it and mount the runners to the frame and have the bearings on the drawer. Then if you need to get at the bearings you just remove the drawer and there they are. Mmm I need to put that through the thought process a bit further.
You have got me thinking again on the brake situation. I am going to have to pull the wheels off and have another good look at space and options

[dales133]

I thought about that but these bearings should last for years in this aplication.
Only the front few should fail if anything

[Sheddie]

Thats right, it's not as though they will spinning very fast. Are you going to put them all the way along? Or you could just put some wheels under the front edges of the drawers to run along the floor.

[dales133]

Yea 8 on the bottom, 1 at the back on top and 3 at the front on top

[Sheddie]

[dales133]

Got my bolts today and bolted the new bearings up.
Problem is the acuracy of the holes for the other draw runners wernt precise so im hand filing the holes on all the high bearings so the run on all of them.
Stoked with how it looks though

[dales133]

[MadMango]

Some eccentric bearings/cam followers should be available in the same size, they have an offset hole for alignment purposes.

[dales133]

Hmmm could be useful.
Ill stick with a bit of fuling initialy and see how i go.
Im only takking a mm or less on most but id prefer the load supported by them all for longevity

[noseoil]

Dale, looking good now! The devil's in the details, isn't it? I like the sliding track with roller bearings you have mapped out & it should be plenty stout. Do you have an idea about the actual weight on this assembly is going to be when you put all the stuff in place & it tracks?

Also, what type of latch system will you be using to make it work & hold in place when on the road?

[KCStudly]

... what type of latch system will you be using to make it work & hold in place when on the road?

... and i assume that you have some sort of catch planned to keep the drawers from over extending, that will also allow the drawers to be slid out for maintenance/access.

Probably not necessary with the multiple bearings, but my first reaction was wondering if double shear brackets could be fab'd to support the bearing axles at both ends. (I do tend to engineer things a bit... sometimes over engineer.)

[dales133]

Hi Tim,
This set up actualy weighs alot less than the other draw runners and being completly sealed bearings that are hardly doing thier intended use at all so i expect theyll last indefinatly.
The weight is around 1kg for the 20x50 1.6mm RHS and about the same tops for each set of bolts and bearings.
In probably going to use slam latches or over center latches to hold them closed but they will also have a tailgate closed over them.
As for the draws themselves they are just folded 1.6 ally and dont weigh a great deal.
Having said all that its gonna be a heavy rig when its all said and done ( heavier than i hoped but ive over built the crap out of it)

[dales133]

Hey KC ,
What do you mean by shear brackets?
Im all for making them last.
As for stopping it over extending...this is why i didnt do this method before but had wanted to,i had no idea how to sort out the finer details.
The guy thats folding the draws has used this system on his camper and a few others and im going by his method with a few tweaks.
He uses a bolt through the draw side the stops against the top rear bearing at the front.
If that makes sense.
I was still trying to work out how to make this removable though as i can only access it from inside the draw.
Happy for your input on this.

[KCStudly]

A double shear bracket would support both ends of the axle bolt, meaning that the bolt would be less likely to bend and would have to fail (shear) in two location in order to fail. I would envision the bracket being somewhat like the letter 'A' with the bearing side being perpendicular to the wall and the opposite side being angled (triangulated), perhaps even with a second bolt offset from the axle to keep the bracket from rotating. Let's see if I can fake sketch something using text.

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