Morning all,
Me again. I'm ordering a new front brake cable for my 1965 B40F. The one on my bike at the moment, at the bottom end, has a clevis fork, a clevis pin which goes through it, and a small split pin which goes through that.
Draganfly's drawing shows a threaded pin and nut, rather than a split-pin arrangement.
I guess it doesn't matter which system? In one system, the split pin looks a bit flimsy, esp if it were to rust, or if it were bent too far. In the other system, I guess a nut could come loose (but presumably there is a washer there to prevent that.)
Which is the better way? Phil.
A matter of personal preference.
The cable bottom end fork for the screw and nut has a thread so the thin nut is just a lock nut. A clevis wont fit unless you remove the thread. The screw should have a plain section where is bears on the brake lever some pattern ones are threaded all the way.
A fork for clevis will be plain no thread so the clevis fits straight through.
Split pins are available in stainless steel
My 1963 B40 has a threaded fork with a 1/4" BSC screw and nut, but the spares catalogue shows a clevis pin. I've no idea why they should go to the extra trouble with threaded parts when a clevis pin would have been simpler and cheaper. I'd have thought the smooth surface of a pin rotating in the hole in the brake cam lever would have been better long term.
Fit whatever is convenient. We're not doing the mileage to cause problems.
For what it's worth, 40 odd years ago I put together a kit car and in the process of rushing to get it finished, tested and on the road, I forgot I had put a small bolt and nut through the forked end of the handbrake cable where it is fitted to the lever coming out of the backplate, when the donor car had a pin and split pin arrangement.
Much shaking of head by MOT man, must be a split pin or one of those "p" shaped clips going through the pin he said, nuts come loose...a no, no for brakes.
He let me fix it, nice man , but I learned my lesson.
I am surprised the parts catalogue shows a nut and bolt, but that must have been acceptable in those days.
There are 2 distinct forms of forks on the end of brake cables.
One which takes a screw and lock nut - one side is drill 1/4 inch clearance and the other is threaded 1/4 x 26 tpi cycle. The screw has a plain protion, it screws into the threaded end so that the plain part bears on the brake lever hole, then the nut is added as a lock nut. A plain clevis will not go through unless you drill out the threads. This one is not designed for a clevis.
The second is drilled 1/4 inch clearance right through so a clevis will fit. This one is not designed for a screw and nut.