dd or smooth shaft

Getting ready to set up my steering and was wondering do I go with dd or smooth shaft. I have a chance to buy a good brand of smooth joints and wanted to know if one was better choice. It's going in my international bobber truck that I'm building. It is a light weight truck if that helps. Thanks for any help.

 

I wish I would have used DD just because its a little easier to work with, but either one is fine

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Smooth/round you are asking the setscrews to handle all the load
DD the shaft is handleing the load and the screws are just holding it in place

 

yes.....DD is the way to go

 

I like DD because its easy to work with. I usually detent each end of the shaft where the set screw contacts.

 

Another vote for dd...

 

These are the answers I thought I would get but I figured I better ask just in case.

 

Not if you weld it on.

 

Use the DD or splined. Don't use smooth shafted that needs welding or pins. So much easier to remove/replace when you can just remove a couple set screws and out it comes.

 

It's just like breast sizes, Double D is the way to go.

Rich

 

Funny,but true! HRP

 

I mock it up with 3/4 wood dowels and sand the flat spots on the ends to match the DD. you can use DD joints on round material. You just have to sand or machine the flats.


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I used round and welded the joints,,,I know...not such a great idea but i did not want to depend on a 1/4" bolt or set screw for my steering...next time DD

 

I don't trust set screws on either so I drill one all the way through and pin it with a 1/4 inch grade 8 bolt. Might not be the way some do it, but it works for me.

Don

 

DD is the only way to go

 

Splined shaft is the way to go.check out the borguson site

 

As far as I know the round u-joints are weld type. Nothing wrong with them, just not removable.

 

We used the DD in our roadster build...

 

As long as you are making it, use DD so it can collapse in a collision ! Gary

 

Borgeson recomends smooth for racing only. Something about vibraton cracks. Of course I read that after welding mine up. Next time I'm going DD.

 

You should never weld steering joints - it weakens the joint by up to 30%.

Here's what Borgeson has to say on the subject:

 

I didn't drill through my DD shaft. After i put the set screw in it leaves a mark. Take the coupler off and drill only enough to counter sink the set screw. Then used blue lock tight in the set screw and lock nut.