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virgil
Original Poster
1,521 posts
93 months
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OK, so body hopefully coming off this weekend...and expecting to see some rust on the outriggers...if they need replacing - anyone know what wall thickness of tube was used and what grade? ERW or seamless??
Cheers,
Scared of Essex....
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TVR Beaver
2,105 posts
49 months
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Have you nothing to do LOL.. Only the gearbox left after that then 
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virgil
Original Poster
1,521 posts
93 months
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TVR Beaver said: Have you nothing to do LOL.. Only the gearbox left after that then Yeah - moving house (hopefully) in 6-8 weeks!! Gearbox IS next ;-)
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Barreti
5,173 posts
106 months
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This is what I used. The joining tube was very tight and had to be hammered down the original so I think I got it right.  A couple of tips if I may: You'll end up with offcuts of the flat plate you use for the corner flitches, use these offcuts for spacers/strengtheners under the bolts on the inside. Dump loads of rust cure down the original tube before you hammer in the joining tube. Just in case.
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virgil
Original Poster
1,521 posts
93 months
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Barreti said: This is what I used. The joining tube was very tight and had to be hammered down the original so I think I got it right. A couple of tips if I may: You'll end up with offcuts of the flat plate you use for the corner flitches, use these offcuts for spacers/strengtheners under the bolts on the inside. Dump loads of rust cure down the original tube before you hammer in the joining tube. Just in case. Tips...you may indeed... looking at the pic though...that's 1.2mm of interferance fit...you sure that's right?? you must have a HUGE hammer!! And was it ERW?
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Geoff38
355 posts
115 months
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I read that as 0.4mm clearance... 38 - 1.6 = 36.4 inside diameter of larger tube
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virgil
Original Poster
1,521 posts
93 months
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Geoff38 said: I read that as 0.4mm clearance... 38 - 1.6 = 36.4 inside diameter of larger tube It's going to be 1.6mm WALL thickness..so x 2 38mm - (2 x 1.6mm = 3.2mm) = 34.8mm inside dia. 0.8mm wall thickness is WAY too thin..
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del 203
12,727 posts
118 months
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virgil said: OK, so body hopefully coming off this weekend... I'm busy this weekend 
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virgil
Original Poster
1,521 posts
93 months
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del 203 said: I'm busy this weekend Just come round for a beer about 11 oclock sunday..I won't expect you to help...honest ;-)
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del 203
12,727 posts
118 months
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virgil said: Just come round for a beer about 11 oclock sunday..I won't expect you to help...honest ;-) Call/txt a reminder at the weekend  I'll switch my phone off
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Geoff38
355 posts
115 months
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Doh ! I stand corrected , sorry for that mis-calculation. 
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Simon says
9,307 posts
90 months
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virgil said: Barreti said: This is what I used. The joining tube was very tight and had to be hammered down the original so I think I got it right. A couple of tips if I may: You'll end up with offcuts of the flat plate you use for the corner flitches, use these offcuts for spacers/strengtheners under the bolts on the inside. Dump loads of rust cure down the original tube before you hammer in the joining tube. Just in case. Tips...you may indeed... looking at the pic though...that's 1.2mm of interferance fit...you sure that's right?? you must have a HUGE hammer!! And was it ERW? No  in fact the bigger tube I.D is 0.4mm oversized 
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virgil
Original Poster
1,521 posts
93 months
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Simon says said: No in fact the bigger tube I.D is 0.4mm oversized Eh?? That makes 0.8mm wall thickness (unless my brain is fried) Don't....under...stand....
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Barreti
5,173 posts
106 months
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Guys, I don't begin to understand what you're talking about I'm afraid.
I measured these tubes with a vernier. Simple as putting it across the tube for OD and pinching the wall for the thickness.
The tube measures 38mm across the centre (diameter) and the wall is 1.6mm thick, so there is a 0.4mm difference between the Internal diameter of the bigger tube and the Outside diameter of the smaller tube. A tight interference fit.
Does that mean I stated the numbers incorrectly? Because I can't work out some of the numbers discussed (2 x 1.6 = 3.2 for example - where does 2 come from?)
I'm afraid I don't know what ERW means either.
ETA: Found what ERW means. Mine did have an obvious seam.
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virgil
Original Poster
1,521 posts
93 months
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Sorry - didn't mean to make it a painful discussion ;-)
ERW (Electic Resitance Welded or something like that) - basically 'normal' mild steel tubing, pretty affordable. Most normal chassis are build using it i believe. Didn't know if the TVR chassis was built using seamless, cold drawn, or high grade carbon steel...
From the measurements you took with the vernier:
outside = 38mm,
pinching the wall = 1.6mm
BUT the tube has a wall thickness all the way round, so effectively has two sides (or a top AND a bottom)...so you need to double the wall thickness when subtracting from the OD to get the ID. Hence 38mm -(2 x 1.6mm) = 34.8mm
or if it was 1.5" (38.1m) 16 guage (1.63mm) tube and and the smaller was inch and 3/8 tube (34.925mm) it's pretty much just a 0.1mm interference fit..
Still think you've just got a massive hammer...
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del 203
12,727 posts
118 months
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del 203 said: virgil said: Just come round for a beer about 11 oclock sunday..I won't expect you to help...honest ;-) Call/txt a reminder at the weekend I'll switch my phone off I forgot  and you didn't call ...
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virgil
Original Poster
1,521 posts
93 months
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Did you see the weather Sunday?...bugger laying under the car in that lot...Cant wait to move house and get a garage!! Don't worry - you've not missed your oportunity to lend a hand 
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rev-erend
17,903 posts
153 months
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Try not to weld outside in the rain .. not good for your health.
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