Rob
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So... I need to shorten some Capri Atlas half shafts. I have two options - cut the shaft and respline or cut, sleeve and reweld? I know what is 'right' - just wondering if the other option is as bad as I suspect it might be... no clues  Thanks in advance. |
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Last Edit: Jun 7, 2011 20:29:29 GMT by Rob
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Copey
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would have thought cut and re-spline would be the best bet! be stronger
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1990 Ford Sierra Sapphire GLSi with 2.0 Zetec
1985 Ford Capri 3.0 (was a 2.0 Laser originally)
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Rob
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Yeah, it's going to have a fair bit of power going through it so it needs to be strong. I'm just wondering if a well done sleeve is a considerably weaker and why...
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md
Part of things
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my mate got sleeved ones when we put an h22 into his civic. bust them within a month, ordered more from a different company, same result. Last 2 years he's been using cut and resplined ones with no problems...
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Copey
Posted a lot
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Yeah, it's going to have a fair bit of power going through it so it needs to be strong. I'm just wondering if a well done sleeve is a considerably weaker and why... they are weaker because welded together bits are never gonna be as strong as one solid piece of metal |
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1990 Ford Sierra Sapphire GLSi with 2.0 Zetec
1985 Ford Capri 3.0 (was a 2.0 Laser originally)
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Rob
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^^ That's what I needed to hear md. OK... I think I know what I need to do  |
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Last Edit: Jun 7, 2011 21:19:10 GMT by Rob
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Rob
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Yeah, it's going to have a fair bit of power going through it so it needs to be strong. I'm just wondering if a well done sleeve is a considerably weaker and why... they are weaker because welded together bits are never gonna be as strong as one solid piece of metal Oh yeah - makes absolute sense. But at the same time I know weld is massively strong but I wouldn't trust it in a twist situation. I was curious to see if people used sleeving with no issues... Just curious I guess... |
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A few years back I was running a mk1 Zephyr with a 2.8 cologne V6 which was screaming its brains out at 65 mph. A mate said a mk3 Zodiac diff would be a straight swop, so I put the Zodiac diff in but the half shafts were completely different so I sleeved them using the mk3 inners mated to the mk1 outers and ran it round for months giving it plenty of ' welly' and had no problem at all.
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I wouldn't say sleeved was inherently weaker, a proper weld can be stronger than the metal around it.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Rob
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^^ & ^ argh, stop it! Just as I'd decided on resplining!
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I think it's all to do about heat.
A proper company will retemper a shaft after modification whether cutting splines or sleeving.
Often, I suspect, those that simply weld a sleeve don't retemper so you have disrupted material properties with the area around the weld being weaker and thus twisting / snapping.
Paul h
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harris66
Part of things
drive it, break it, fix it and make it quicker!
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ive seen a method used by where the shaft is cut, one half then machined down for a 6in section, the other half drilled, the two then slide into each other, two opposing holes drilled where the inner sections meet and welded up, then the joint welded, copped with a small block chevy without issues
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1.2 corsa daily, 1.8t a4 avante, 6.3ltr austin a40....
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30psi
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I have the same issue. I've gone with welding for now, but have told the machining man to do a good thick strong sleeve.
The problem is the shaft only needs shortening 1.5". Resplining in this area isn't possible as the shaft has a reduced girth behind the splines.
I'm expecting to break the shaft, but I need it done more economically to get the car moving.
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1962 Ford Thunderbird 6.4L
1981 Datsun Bluebird SSS CA18DET
1981 Datsun Bluebird SSS SR20DE
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at least if a shaft breaks its saves the gearbox or diff breaking.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Dez
Club Retro Rides Member
And I won't sit down. And I won't shut up. And most of all I will not grow up.
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Club RR Member Number: 34
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ford ones are generally done but cutting the axle out of the centre of the flange, then sliding the flange over the shaft the required amount, welding both sides then machining the excess shaft off- so the axle shaft basically pierces the hub flange and is welded both sides. this is stronger than sleeving as the welds are further out (radially), and theres two of them. ive never seen one done like this break, even on 400+hp applications
ive just done a scimitar axle so its 6" narrower, they don't have flanges so i socketed, welded, sleeved and then welded that too, as i could do that myself and there wasnt room in the budget to pay for resplining. i doubt it will break as it only need to take 200hp, on 155 tyres!!
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Rob
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Cheers all... The shaft I have can take resplining as the shaft actually narrows slightly for the splined section so it makes sense. I've seen them done as you say Dez (at the hub end - pulling it through) but I think if I can spline it, and can afford it, then I should.
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Rob, what about getting a Baby Atlas, which is already narrower than a Capri Atlas, from a donor Ford? Badda-bing, nothing to modify.
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 Team Blitz Ford Capri parts worldwide: Restoration, Road, or Race. Used, Repro, and NOS, ranging from scabby to perfect. Itching your Capri jones since 1979! Buy, sell, trade. www.teamblitz.com blitz@teamblitz.com |
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Rob, what about getting a Baby Atlas, which is already narrower than a Capri Atlas, from a donor Ford? Badda-bing, nothing to modify. piggin' expensive over here though unfortunately unless you get really lucky. |
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Ah, I see. OK, what about a full-floater kit, with splined axles that slide into the hubs by design? Order them to desired spec, and no issues about heat-treat.
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Team Blitz Ford Capri parts worldwide: Restoration, Road, or Race. Used, Repro, and NOS, ranging from scabby to perfect. Itching your Capri jones since 1979! Buy, sell, trade. www.teamblitz.com blitz@teamblitz.com |
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Rob
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I'm kind of recreating one Team Blitz. The axle casing I have has had a lot of work done though so I wanted to use it if possible - and it was LSD (unsure if these can be swapped between Atlas's). The Baby wasn't quite right anyway so at least I get it bang on popuptoaster's right, |
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