F-250 Drive shaft E Brake
#17
That would be great Jules. I thought the same thing, stopped...no pressure until you drive off with it set. I would hope that a lever over the floor would apply enough hand brake that would kill it with a clutch. I installed a dually axel under mine but left the handbrake on the floor just cause it was already there. Pics of your repair would be awesome. What kind of epoxy did you use?
#19
#20
#21
#22
In a case where you develop a problem with the single-reservoir main braking system, you'll want all of the tenacious grip you can muster. It's not just a wheel chock. In an emergency, it is quite possibly the ONLY brake left.
One fear I'd have regarding most epoxies would be an inevitable release due to both flexure and temperature cycling. Rivets won't let go. Not for a very, very long time.
One fear I'd have regarding most epoxies would be an inevitable release due to both flexure and temperature cycling. Rivets won't let go. Not for a very, very long time.
#23
I would still say the rivets are only there to hold it in place there is no way those little rivets could actually take the braking load.
The friction of the brake lining against the band is doing all the work.
If you were to say put a thin layer of teflon between the brake lining and the band, then try to use only rivet all those little rivets would shear right off. That may only be my opinion but I think it makes sense.
Also I think if you compared the load capacity of the 20 or so 1/8" rivets to the 48 square inches of epoxy, I think you would find the epoxy will win.
A good example would be many modern brake shoes and brake pads for drum and disk they are merely glued on!
The friction of the brake lining against the band is doing all the work.
If you were to say put a thin layer of teflon between the brake lining and the band, then try to use only rivet all those little rivets would shear right off. That may only be my opinion but I think it makes sense.
Also I think if you compared the load capacity of the 20 or so 1/8" rivets to the 48 square inches of epoxy, I think you would find the epoxy will win.
A good example would be many modern brake shoes and brake pads for drum and disk they are merely glued on!
#24
Join Date: Aug 2002
Location: Saskatoon SK Canada
Posts: 6,682
Likes: 0
Received 11 Likes
on
8 Posts
You have to remember that for years, brake pads and shoes were riveted on.
The newer epoxied brake pads don't rely entirely on glue. They have tiny barbs or the back plate is drilled and the friction fills the holes.
I've changed many brake pads were rust has separated the friction material from the glue on the drilled backing plate pads. Once the pad was removed from the caliper the friction fell off.
Never underestimate the force to shear those little rivets. Lets say they are 10k psi each, times 20 equals 200K psi to remove that brake band.
The newer epoxied brake pads don't rely entirely on glue. They have tiny barbs or the back plate is drilled and the friction fills the holes.
I've changed many brake pads were rust has separated the friction material from the glue on the drilled backing plate pads. Once the pad was removed from the caliper the friction fell off.
Never underestimate the force to shear those little rivets. Lets say they are 10k psi each, times 20 equals 200K psi to remove that brake band.
#25
The model T lining is what I was talking about . You could glue the lining and then drill, from the out side and use a 90 degree drill to counter sink the holes from the inside , . You would have to get the right punch to flare out the rivets . Use a piece of pipe with a 1/4 inch bolt welded to it put it in a vice line up the head of the rivet and punch the other end . Not a hard fix .
#26
Well I am not saying rivets have no strength. Most of the force is still going to be handled by friction. I mean there are no rivets that engage the drum when the brake is on as it is unnecessary. A 1/8 steel rivet wild have a shear strength of around 280 lbs, with 20 rivets that is around 5500 pounds. The original rivets I pulled from mine were certainly only brass so even weaker.
Epoxy on the other hand can have a shear strength of anywhere up to 10,000psi pounds per square inch. At 48 square inches you are talking much higher strength with the glue.
I glued and riveted mine because I am paranoid about everything and always go big or go home.
I am sure you could also find pictures of brake shoes and pads with no rivets or picking features too.
So never underestimate the strength of a little glue!
Epoxy on the other hand can have a shear strength of anywhere up to 10,000psi pounds per square inch. At 48 square inches you are talking much higher strength with the glue.
I glued and riveted mine because I am paranoid about everything and always go big or go home.
I am sure you could also find pictures of brake shoes and pads with no rivets or picking features too.
So never underestimate the strength of a little glue!
#27
#28
#29
Post 1: You asked about ebrake lining and "components" which I assumed meant that you wanted other parts unrelated to the lining.
Post 10: I asked you to look at the pic and list the numbers of the parts you wanted.
#30
If using glue only, I would pick my adhesive very, very carefully. I agree that the lining-to-band friction (stiction?) does the vast majority of the work. However, due to poor surface prep, adhesive choice, or thermal failure due to smoking the band for a few miles, once the glue let go there may be a possibility of the band becoming displaced (particularly while not engaged) if no rivets were there to hold it.