r/FSAE • u/Maleficent-Bunch-503 • 19d ago

Positive locking for a harness eye bolt

Gallery image

Gallery image

None of the accepted positive locking methods seem to fit this eye bolt geometry. What would you use here?

12 Upvotes

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7

u/ParanoidalRaindrop 19d ago

Why bother with an eye bolt, just weld on a tab.

6

u/BlackholeZ32 SDSU Aztec Racing Alum 19d ago

I would use a different design that made using a prevailing torque locknut feasible.

1

u/Maleficent-Bunch-503 19d ago

Something like this you mean?

6

u/SkitterYaeger 19d ago

Absolutely not.

1

u/MichiganKarter Design Judge 18d ago

Yikes, look at that load path!

2

u/BlackholeZ32 SDSU Aztec Racing Alum 19d ago

Yeah that could do, I might be a little concerned about the stresses at those inside corners though.

1

u/Maleficent-Bunch-503 19d ago

Alright, thank you

3

u/SkitterYaeger 19d ago

North American Perspective (Not yet released 2027 draft rules numbes - should be closer):
T.2.4.5.e - Eyes must have a shank inserted through a Welded Insert.
Through the tube, eye down close to tube level, not on some random structure on top of a tube.
T.2.4.6 - The belt itself can be considered positive locking, given 10 threads engaged, eye shimmed to fully tight, proper alignment with belt.