12-08-2010, 06:24 PM | #1 |
Newbie Join Date: Jul 2009 Location: Southern Ontario
Posts: 43
| Shortening CVDs
So I've searched but haven't really come up with a definite answer for this. I have some LST2 cvd's that I want to shorten for a custom large scale build I'm hoping to do. I've read a few posts of people cutting them and then welding them back, but I don't have access to welding equipment. Can I cut the cvds, sleeve them with some 5mm ID tube, and superglue the tube to the shafts? How durable would this be in a ~15lb truck? Or should I tap two holes in the sleeve (and grind flat spots onto the axles) and put in grubscrews? Ideally I'd put a pin right through the sleeve/axle but I don't want to put through-holes in the axles for fear of weakening them. |
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12-08-2010, 06:27 PM | #2 | |
20K Club Join Date: Jul 2004 Location: Sending illegals home one Hayabusa at a time.
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12-09-2010, 09:03 PM | #3 |
Newbie Join Date: Jul 2009 Location: Southern Ontario
Posts: 43
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How about pinning them? I've seen a few posts doing that. The axles are 5mm - would running a 3mm pin straight through weaken them a lot?
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12-09-2010, 09:15 PM | #4 |
Rock Crawler Join Date: May 2008 Location: Mansfield, PA
Posts: 560
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Superglue isn't going to cut it Just take them to a (good) welding shop and have them shortened and TIG welded back togather Last edited by Trugg; 12-09-2010 at 09:19 PM. |
12-10-2010, 06:08 AM | #5 |
I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
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What part needs to be shortened? The inner? Are you talking about CVD driveshafts or axleshafts?
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12-10-2010, 06:41 AM | #6 | |
Newbie Join Date: Jul 2009 Location: Southern Ontario
Posts: 43
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If you weld these, do you cut them in half and then just weld the joint back, or do you put a steel sleeve over them and weld the sleeve at both ends? | |
12-10-2010, 06:49 AM | #7 |
I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
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If you are talking about the CVDs INSIDE the axle cases, then you can simply cut the end off of the long part. Here is one guy's take: my mrc rebuild |
12-10-2010, 04:54 PM | #8 |
Newbie Join Date: Jul 2009 Location: Southern Ontario
Posts: 43
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Ah, not quite what I was planning on doing. I'm hoping to have independent suspension so I'll need the pinned end of the bone. Running a pin through the bone was done in this build: another 2.2 twin force axle rig I'm just worried about weakening the shaft since it's 5mm and I'd be using a 3mm pin. |
12-10-2010, 05:20 PM | #9 | |
20K Club Join Date: Jul 2004 Location: Sending illegals home one Hayabusa at a time.
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12-11-2010, 05:48 PM | #10 |
Quarry Creeper Join Date: Oct 2006 Location: kansas city
Posts: 369
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I think one way it could be done is to shorten the cvd's but leave some extra length. Then grind a half lap on each end of the bone so when you put them together in a sleeve they over lap each other. Drill a few holes in the sleeve, coat the parts with rosin and use the holes to silver solder the axles and sleeve together. All you would need is the right sized sleeve,torch and solder. Just an idea, but I think thats how I would try it. Randy |
12-12-2010, 10:18 AM | #11 |
RCC Addict Join Date: May 2009 Location: NHFF world headquarters, working on the "rock mauling hill shooting NHFF pig squealing death rocket"
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i did this one and its doing fine i just cut the shaft to length, then sleeved it with brake line, and pined it with these cut to fit what i needed. i just silver soldered it together. now the first time i tried it i just used enough silver solder to keep the pin in place and it broke. i took the broke piece and stuck it back in the brake line and silver soldered it till it ran out both ends, i cleaned it up and its holding fine. 3s , 10t puller, axial transmission, and twin force axles. now im breaking the gear in the trans that goes on the spur gear shaft. but anyways i think it will hold just fine if done like this. a lot of the guys that ran supers on the twin board did it this way and it held up fine also. |
12-12-2010, 04:43 PM | #12 |
Newbie Join Date: Jul 2009 Location: Southern Ontario
Posts: 43
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Yeah, I saw this in your build I linked to above. So that's just a piece of brake line slipped over the cut end of the axle and pinned and then brazed? I find it interesting that it broke when you didn't have enough solder in there, but now is holding fine. We'll see what I end up doing. I really like the idea of pinning it since it's pretty easy, but I also like the toughness I would get if i cut it in half and slipped a tube over it and then had someone weld it all back together.
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