Several years ago I used roll pins to pin my pedals and low-speed cam to the pedal shafts. This was, in retrospect, a poor idea and now that my transmission is apart all the roll pins are on the way out.
Am considering drilling and tapping all the pin holes for 5/16 NF bolts rather than solid pins (the bolt you see in the low-speed cam is actually a 1/4" shank only, no thread, installed in place of a broken roll pin when the transmission was still toghether).
Opinions and experience pro or con on the bolt approach vs solid pins?
Roll pins are to brittle and often fracture,bolts are to soft and sheer. Use the solid pins like Henry did.
Solid pins like Unca Jack says. There easy to put in and stay put, just support the underside of the pin when installing.
Never had a prob with roll pins
Jeff,They can and will shatter and some even back out. For sure they have to be safety wired in,but still best to not use them.
Why not install rivets? Easy, cheap, works great. I make them from 1/4" bolts.
Jacks — I'm with you on the roll pins, and I speak from recent experience. I can also tell you they are a bad idea for securing the generator gear.
But bolts would be too soft? Seems the pins are at least as soft as a grade 5 bolt and certainly softer than a grade 8.
This idea came from a young fellow nearby who is also overhauling a hogshead — his notion is to use a bolt to at least secure the low-speed pedal so the pedal can be removed to make engine re-installation easier.
Royce, are you mushrooming each end a bit?
Well I drive my cars like mad and have never had a problem, it may have something to do with installation
A friend of mine has bolts installed on his pedals. He has put a lot of miles and years on the car and has not had a problem.
I use AN4 bolts to fabricate rivets, just because I have lots of them that were rejected for aircraft use because of minor defects in the cad plating. I put the shank in a drill motor, pull the trigger, then grind off the flats of the bolt to make a round head. Then I grind off the head markings. Cut to length. Wa - La! A rivet. Takes about a minute to make one from an old bolt.
The rivets originally were made from mild steel, so virtually any grade of bolt is harder than the original rivets.
I place a bucking bar in my vice, then hold the hogshead in one hand with the rivet head on the bucking bar. Then I shoot the tail of the rivet using my 4X rivet gun with a #5 set installed. Again very easy to do, takes longer to type this than to shoot all the pedal / cam rivets.
You can use a hammer to peen the ends of the rivets but it takes two people and the results don't look as professional as what I do.
I have hard fine thread bolts in my low gear pedals and have never had a problem. I threaded the bottom side, pulled the bolts up tight and put a nut on the thread sticking out. Bolts are shoulder bolts where there are no threads in the shear zone.