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+--- Thread: Replacing radius arm ball rivets (/showthread.php?tid=4410)
Replacing radius arm ball rivets - Paul Nott - 24-05-2020
In the process of replacing the radius arm ball fixing rivets on the centre chassis rail due to excessive movement.
Can anyone advise what type of bolts to use, it's been suggested they should be fine thread high tensile steel?
Is that necessary , does it have a high load point?
Also what size 1/4 w seams a little small.
Just wondering what others would recommend.
Many thanks
Paul
RE: Replacing radius arm ball rivets - Steve Jones - 24-05-2020
HT 5/16" BSF (or M8 if you want, nobody will ever see them). I've two cars with the chassis ball fixed this way and a third in production. The Trials Car was set up this way back in the early 1990's and has done, probably, hundreds of trials. Never come loose, never budged. Important thing is for the bolts to be a good fit in the holes.
Steve
RE: Replacing radius arm ball rivets - AustinWood - 24-05-2020
If the heads of the bolts are to the front it makes it easier (possible?) to get the radius arms off if necessary.
RE: Replacing radius arm ball rivets - Steve Jones - 24-05-2020
(24-05-2020, 02:15 PM)AustinWood Wrote: If the heads of the bolts are to the front it makes it easier (possible?) to get the radius arms off if necessary.
Definitely. Took them off my Ulster last week with ease (M8 - sorry!)
Steve
RE: Replacing radius arm ball rivets - Terrytuned - 24-05-2020
I use M8 button head socket screws with M8 flange nuts makes it very secure. Terry
RE: Replacing radius arm ball rivets - Bob Culver - 25-05-2020
Apart from holding on mudguards and the like there is lttle place for basic grade bolts in cars, if only because easily broken on tightening. By the same token there are few applications where really high tensile is ideal (gudgeon pins, crown wheel). Everyday ht hardware is about 50% higher tensile, and the yield point is further increased.
RE: Replacing radius arm ball rivets - Zetomagneto - 25-05-2020
+ 1 for the button heads, they make a nice job of it , use HT not Stainless.