Tube size

Author
Discussion

ChrisGadd

Original Poster:

687 posts

229 months

Wednesday 19th November 2014
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Hi All,

Anyone got any idea what diameter and thickness the tube size is for the chassis tube that supports the trailing arm brackets on a S3 ?

Thanks in advance

ChrisGadd

Original Poster:

687 posts

229 months

Thursday 20th November 2014
quotequote all
Just to help identify which tube I mean here is a pic with a red arrow pointing to the chassis tube


phillpot

17,105 posts

182 months

Thursday 20th November 2014
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can you not measure it?

If no calipers available this is my "make shift" way, cut a slot out of a piece of cardboard, little bit at a time until it just slides over the tube, then measure the gap smile




As for gauge or thickness I'd guess at 2, maybe 2.5mm ? If its to be repaired presumably you'll be cutting out the corrosion back to good metal to weld a repair in, measure the piece you cut out?

Stwdv

273 posts

123 months

Thursday 20th November 2014
quotequote all
Or you could measure the circumference and work back using

Circ= pye x dia

ChrisGadd

Original Poster:

687 posts

229 months

Thursday 20th November 2014
quotequote all
Thanks for the quick reply Mike and a good makeshift way of measuring the tube diameter.

The mobile welder wanted to know what tubing he needs to get in before he arranges a date for the job.

ChrisGadd

Original Poster:

687 posts

229 months

Thursday 20th November 2014
quotequote all
Stwdv said:
Or you could measure the circumference and work back using

Circ= pye x dia
Stewart have you thought of a future in maths idea

Stwdv

273 posts

123 months

Thursday 20th November 2014
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Naaaaaaa not clever enough did Engineering instead

Top Gear TVR

2,244 posts

153 months

Thursday 20th November 2014
quotequote all
Engineering is much better than maths :-)

Get a bit of insulation tape, wrap it around the pipe, run a line across where the two ends overlap, gently unreel and measure. Divide by PI and leave PYE to make old televisions :-)

Kitchski

6,514 posts

230 months

Thursday 20th November 2014
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57mm O.D

ChrisGadd

Original Poster:

687 posts

229 months

Thursday 20th November 2014
quotequote all
Kitchski said:
57mm O.D
Many thanks

DamianS3

1,803 posts

181 months

Thursday 20th November 2014
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Managed to replace mine with some seamless when we settled my chassis.. Also think we went 3mm but could be wrong.

Damian S3

greymrj

3,316 posts

203 months

Thursday 20th November 2014
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Kitchski said:
57mm O.D
I have a suspicion TVR thought it was 2 1/4" OD tube when they bought it!

Kitchski

6,514 posts

230 months

Friday 21st November 2014
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greymrj said:
I have a suspicion TVR thought it was 2 1/4" OD tube when they bought it!
You can still buy it as 2 1/4" if you enjoy a black & white television biggrin

We always buy the next size down too, so we can sleeve joint the connections.

greymrj

3,316 posts

203 months

Friday 21st November 2014
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Funny isnt it, after all these years of metrication in the UK (and I was trained in metric before that) you go into a steel stockist and ask for 57mm and the guy looks worried, then you ask for 2 1/4" and all is well!

Now, must check the tyre pressures (in psi!) and make plans for a drink (pint) tonight. Tomorrow I have to pick up some wood, the supplier only sells in metric now, 2.44m is the most convenient length he has! (8ft!).

My TV is in colour, as is my laptop, both Japanese Toshiba, and sold with a screen size in inches!

I have an item to ship to America, the purchaser wants to know the exact size......yes, you have guessed it, in inches!

A pet one of mine is that we teach our kids in cm, which is not even an SI metric unit! I would have been dragged out and shot for using cm at work in an international company which was 'metric' in the 60's!.

What a mess my generation is leaving!


Edited by greymrj on Friday 21st November 17:55

magpies

5,129 posts

181 months

Friday 21st November 2014
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Yep

I'm in the generation that started with imperial then went cgs (centimetre/gram/second) and then when they realised the numbers were too big changed to mks (metre/kilogram/second)

yes it was confusing

v8s4me

7,234 posts

218 months

Friday 21st November 2014
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Stwdv said:
Or you could measure the circumference and work back using Circ= pye x dia
I have enough problems with PAYE laugh

LawrieS

338 posts

115 months

Friday 21st November 2014
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Hi Chris, you aren't too far from me, could you pass on your welders details?

I'm near Ilkeston.

ChrisGadd

Original Poster:

687 posts

229 months

Monday 24th November 2014
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LawrieS said:
Hi Chris, you aren't too far from me, could you pass on your welders details?

I'm near Ilkeston.
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