Scamp Axle Cross Section - Fiberglass RV


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Old 10-30-2012, 06:13 PM   #1
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Scamp Axle Cross Section

There have been several threads about torsion axles. I thought some of you might like to see what an axle looks like on the inside.

SO, when I replaced my Scamp 13 axle last week I cut the axle just inside of the arm. This is an old Dexter axle and you clearly see the axle, the rubber strips and the surrounding tube. The solid square bar in the middle is the axle and that was connected to the leading arms. The rubber and the outer tube do not connect to the arms themselves. The ends of the rubber strips "smeared" a little while I was cutting, but the cross sections are pretty true to their original (worn out) shapes.

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Old 10-30-2012, 07:04 PM   #2
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Thanks for taking the trouble to show us this.

Too bad these can't be made so you could just replace the rubber, although I guess 25 years is adequate service life.
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Old 10-30-2012, 07:14 PM   #3
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Thanks! I had always wondered what it looked like.
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Old 10-30-2012, 10:59 PM   #4
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Thanks for taking the trouble to show us this.

Too bad these can't be made so you could just replace the rubber, although I guess 25 years is adequate service life.
Perhaps this would be an advantage to a true spring type suspension? If you start to get sag, you can just add another leaf.
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Old 11-01-2012, 10:53 AM   #5
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Too bad these can't be made so you could just replace the rubber, although I guess 25 years is adequate service life.
I think they could.... but so few of us have got the pressurization tank with integral liquid nitrogen injector needed to do it - see Henschen plant tour page.

However some suspensions (Flexiride, I think) use rubber that's bonded into place. It would be interesting to know if they last longer.
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Old 11-01-2012, 11:10 AM   #6
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I think they could.... but so few of us have got the pressurization tank with integral liquid nitrogen injector needed to do it - see Henschen plant tour page.

However some suspensions (Flexiride, I think) use rubber that's bonded into place. It would be interesting to know if they last longer.

Very cool (literally). I wondered how the rubber was inserted.
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Old 11-01-2012, 03:21 PM   #7
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Thanks to "m" for sharing the photo's - that is cool to see. How they actually get them in the tube is even more interesting!
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Old 11-01-2012, 03:24 PM   #8
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Thanks to "m" for sharing the photo's - that is cool to see. How they actually get them in the tube is even more interesting!
After the shaft is inserted into the axle housing, what holds the axle from coming back out? Just the friction of the rubber?
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Old 11-02-2012, 04:12 AM   #9
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Yes, just friction. But no need to panic - how many axles have had an arm slide out?
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Old 11-02-2012, 08:31 AM   #10
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Yes, just friction. But no need to panic - how many axles have had an arm slide out?
No panic here. I wondered because it would be neat to pull one apart and just get new frozen rubber inserts.
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Old 11-02-2012, 01:00 PM   #11
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....and just get new frozen rubber inserts.
I don't think there is any way to compress the old axle rubbers in order to get the arm out - plus the axle would have to be taken to an axle factory to get the rubber cords inserted before they warmed up and expanded.
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Old 11-02-2012, 02:14 PM   #12
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I don't think there is any way to compress the old axle rubbers in order to get the arm out - plus the axle would have to be taken to an axle factory to get the rubber cords inserted before they warmed up and expanded.
I'm pretty sure that you could pull one apart with a hydraulic press. But to get new rubber inserts, you are correct - it would have to be done at the plant.
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