anyone make these bigger?
- Thread starter madmak
- Start date
The ones I had on my last car were from speedway, before they went to that one piece design in the picture. And they were just a bolt welded to a peice of tubing. So if you can weld, you could make your own. Find a peice of tube with the right ID and OD, and the bolts you need. and weld it up.
Be careful welding a bolt to a piece of tubing. I know lots of people do it, but I just don't think it's a good idea. Especially if the part you're making is structurally important.
The reason is simple. The alloys use to make fasteners, are not formulated for welding. Especially the Allen bolt families and anything that's grade 8.
Just my two cents. Sorry if it bugs anyone.
David
The reason is simple. The alloys use to make fasteners, are not formulated for welding. Especially the Allen bolt families and anything that's grade 8.
Just my two cents. Sorry if it bugs anyone.
David
Agreed. Even Jim Kirby still does this. And I'm sure he has a Bazillion of them out there still running. He does it for spring perches and even the adjustable poly ends for radius rods and four bar links.
I only brought it up as a concern. Remember, I'm the big scaredy cat. In my opinion only, it's a less than ideal solution.
Fasteners are typically formulated from "free machining" alloys with higher Sulfur and Lead levels to aid in manufacturing the them at the highest possible speeds. It's the higher Sulfur and Lead contents that are the problem when you start to weld on them.
But I agree, a lot of good people do this with reliable results.
David
I only brought it up as a concern. Remember, I'm the big scaredy cat. In my opinion only, it's a less than ideal solution.
Fasteners are typically formulated from "free machining" alloys with higher Sulfur and Lead levels to aid in manufacturing the them at the highest possible speeds. It's the higher Sulfur and Lead contents that are the problem when you start to weld on them.
But I agree, a lot of good people do this with reliable results.
David
Ted Brown
Member
When in doubt, weld it with stainless (rod) anyway, the 13/4" hanger is the perfect width for a 2" spring, this allows for back and forth movement when the chassis moves up and down, as the shorter radius rods make the axle movement more, so this takes the bind out of the spring and hanger mounting...
Hotrod46
Member
Just to add a little to this discussion. There was a thread on the HAMB recently (sorry I don't have a link) about an end very similar to the one pictured in the first post that failed in the threads.
These ends are usually cast (at least the ones I've looked at appear to be) and I would be very concerned about that (think 3rd world metallurgy). If it was a forging, that might be a different story. The threads on these ends also appear to be cut , as opposed to rolled, and if not done carefully that will create a stress riser at the root of the threads.
There are a LOT of welded ends in service that are holding up well. Lots of high stress parts are welded all the time in various industries. As long as the welding is done correctly, history alone says that they will hold up.
Another point, if you're running a 4-bar then the end sleeves are welded to the bars with about the same weld area as the welded spring hangers. Nobody ever seems to question that application.
Just my 2 cents.
Mike
These ends are usually cast (at least the ones I've looked at appear to be) and I would be very concerned about that (think 3rd world metallurgy). If it was a forging, that might be a different story. The threads on these ends also appear to be cut , as opposed to rolled, and if not done carefully that will create a stress riser at the root of the threads.
There are a LOT of welded ends in service that are holding up well. Lots of high stress parts are welded all the time in various industries. As long as the welding is done correctly, history alone says that they will hold up.
Another point, if you're running a 4-bar then the end sleeves are welded to the bars with about the same weld area as the welded spring hangers. Nobody ever seems to question that application.
Just my 2 cents.
Mike
dmc3113 said:
Danny,
You are right. I like what he's doing. I think it's an elegant solution to a hand fabricated spring perch. Super simple too:
HOT/RAT ROD 1 3/4 SPRING PIVOTS:eBay Motors (item 300355979783 end time Nov-09-09 06:55:25 PST)
Looks like he makes the wider ones too.
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