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Home > Forums > Automotive Engineers > Activities > Automotive suspension engineering Forum

Lock nuts vs. pinch bolts on suspension links

Read More Threads Like This One

Ashman2k2 (Mechanical)

3 Mar 10 21:15

thread800-234092: Lock nuts vs. pinch bolts on suspension links

In reference to this previous thread, a very well known and awesome suspension guru/parts supplier for the Nissan Z32 has this idea implemented in his products and explains the benefit here:
http://www.splparts.com/main4/header/HybridAdjuster/index.htm

However assuming the majority of the load is carried through the first 7 threads I would think the strength is reduced compared to the same sized traditional lock nut design. Any thoughts?

CoryPad (Materials)

4 Mar 10 9:24

My thoughts are that this system provides a small benefit during assembly when using a particular component design and a particular assembly method. If no effort is use fixtures during alignment, then sure, you need three hands to do things.

I wouldn't worry much about reduced strength. All of these joints are oversized due to stress concentration of the threads, especially since they are non-preloaded.

TrackRat (Automotive)

4 Mar 10 10:04

That idea isn't exactly new... it's been around for at least 45 years that I know of. <LOL> It's been used on production car/truck tie-rod links for at least that long. The Porsche version is prettier than the clamp typically used on split shaft tie-rods that have been around since forever, but it's the same clamp principle. I personally like the jam nut but both systems work well.

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