Roll bar supplier

[eSteve]

Hi,

anyone bought a roll bar kit from nicholas2528 on eBay?

Linky:150453293968 (http://cgi.ebay.co.uk/haynes-roll-bar-/150453293968?cmd=ViewItem&pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2307b71390)

Is it a good price, since it includes a few other bits and pieces as well as the main tube?

[ozzy1]

Seems a good price to me.There were a couple of people on here selling rollbars as they were going for the full cage route.
Or the other option is to wait and see if AshG does another group buy if your not in a hurry.

[spud69]

That's a very good price for what you get Steve, its setup to fit onto the book chassis rear end but wouldn't be a pain to convert to grp if required.

Regards....AndyH

[eSteve]

I thought it wasn't too bad a price although £25-00 delivery is a bit steep.

Book back-end is my plan so I'd needn't diddle it around at all.

I'm just thinking ahead at present, since I'm not fully under way yet.

I am painting build table white, laying things out and picking up another (got through one already doing a welding cart and practising) bottle of 'Garage Gas' (argon, co2, os mix) from South Coast Welding latter on today. Then things will be finally under way.

[Airhead]

Just one point; shouldn't rollbars be made from DOM not ERW or is that just the regulation cages?

Matt

[eSteve]

Airhead,

by DOM do you mean seamless CDS (cold drawn steel)? What does DOM stand for?

The book says it should be 'preferably seamless' (p. 53). Is there any IVA requirement for construction of the rool bar? I'll have a look through the spec.

I too believe that for competition use, the roll bar/cage material specification may be tighter.

Anyone know for certain what the IVA regs. on a road going roll bar is?

[Airhead]

Sorry DOM is the Yankee for CDS..

[deezee]

I've just looked through the IVA and it says nothing about the roll bar? The only mention is that if the seat belts are anchored to it, it gets a good looking over to ensure its firmly fixed to the chassis.

[spud69]

You're right Deezee, there is no requirement for a road going car to have a roll bar / cage and is not covered in the manual / test requirements. It just comes under scrutiny to make sure it is substantial enough to take the seat belt mounts.


AndyH

[eSteve]

Well I didn't know that. I thought a roll bar was mandatory.

So this eBay chap's roll bar should be more than suitable then?

For what it's worth: DOM is 'drawn over mandrel' and according to Wikipedia (http://en.wikipedia.org/wiki/Tube_%28fluid_conveyance%29) (and some other sites) is ERW that is drawn over a mandrel to shape it in to a specific profile.

[Airhead]

ERW is different in that it has a welded seam - the DOM or CDS is seamless.

Love your sketchup chassis - did you draw that?

[eSteve]

Looks like we've confused ourselves, or maybe just myself!

Of the 200+ things that CDS can stand for, two are:

(1) Cold drawn steel - which I guess, as Wikipedia and other sites state, it could be ERW tube that is cold drawn to some other shape or may not even be tube that is cold drawn, but basically anything cold drawn and steel, solid or not, seamed or not, this is the definition I stated.

(2) Cold drawn seamless - As you know: seamless tube cold drawn, probably the more correct definition of CDS in fabrication circles. Correct me if I'm wrong.

Presumably CDS (2nd definition) is a sub-set of CDS (1st definition).

Pheeew... I think that's that sorted out:D

Yes, I did draw the Sketchup Roadster model in the link in my signature. I am trying to keep it ahead of my build, so far so good, since I'm only finishing off my build table so far, and havn't got the hang of curves in Sketchup yet!