schnorr washer question, trailing arm bearing bolts - use lock washers? Options

[burlybryan]

I've refurbished my trailing arms/bearing and the schnorr washers are pretty worn and I don't think they should be reused. Any reason I can't use common lock washers here?

[Superhawk996]

Any reason I can't use common lock washers here?

Common split ring lock washers are less than useless for locking anything.

Well documented by NASA and the entire automotive industry.

https://ntrs.nasa.gov/api/citations/1990000...19900009424.pdf
See page 9 & 10

There is no Schnorr washer involved at the trailing arm pivot & bushing. The OEM trailing arm pivot shaft itself has hardened serrations on the shaft ends. On the outside it is just a flat washer that goes beneath the OEM lock nut.

If you’ve used the 914 rubber pivot shafts they used a star (toothed) lock washer instead of the OEM serrated shafts. Get another star washer if this is what you’re calling a Schnorr (which is yet another type of lock washer). With the 914 rubber shafts - you could substitute a Schnorr for the star washer but I would never substitute a split ring lock washer.