Machining your own disc brake adapters forproflex?

[bayarearider]

Wow, i thought this thread would be dead a long time ago.

thanks for the replies

Kiwi,

it's a proflex 3000 that i was planning to fit the mounts on.  I still have the proflex 857 (with no rear shock) that i bought for $75.  

I will not be fabricating a disc mount for the ELT, as i just bought a marzocchi marathon S (yesterday) that i was going to use for my new build.  But might try it on the 3000 until i get the new build together.

OP,

that thing looks crazy, reminds me of the coaster brake i used to have on my BMX bike with i was 10.
Does K2 sell that piece?  i e-mailed K2, and they informed me that they do not sell any disc mount adapters for the prolflex 3000, and they told me to try the hammerhead adapter. Wait, OP is that your bike in the picture?  If yes, did you purchase that from K2?  

[Old Proflexer]

that is the original disc brake adapter sold by proflex for their bikes

not my bike but i wish it wuz

857 with rohloff hub and trac pearls

OP

here's the other side

[bayarearider]

Well, i have time this weekend...and nothing to do so i am looking to begin this project.  This maybe a dumb question, but i've never bought pieces of aluminum except for maybe a can of pepsi, where can i buy the 1/4' piece?



And matno, I couldn't really make it out from the picture, but all you have is one piece of alluminum right?  Or are there two pieces with the dropout sandwiched in between?



one last question, since it will be for my world cup frame, anyone know what size nut i need for the two pre-existing holes on the dropout?  Or will i have to bring the whole thing down to the hardware store and try each one.



Not sure who's bike this is bike i found it in the files section.  Is this the hammerhead mount?

[Matno]

You should be able to get the aluminum from a machine shop. Look them up in the phone book (or on Qwestdex under metal).

My adaptor was actually originally going to have THREE pieces of aluminum, but ended up with two. The outer plate is obvious. The "middle" plate fits perfectly into the oval cutout on the swingarm. It's important because it is the main connection between the brake and the swingarm, at least in the direction of the braking forces. I was going to have a 3rd plate on the inside to hold the whole thing on, but my oval shaped piece ended up fitting so tightly that it wasn't necessary. There's not a lot of side-to-side load on the brake mount. In hindsite, if I were to do it over again, I'd intentionally taper the oval piece to fit tightly (I accidentally did this, but it would have saved some headache to do it on purpose!) Both plates have holes that are threaded, and they pull together, so the inner oval plate actually wedges into the hole from the inside. Did I explain that well? One of these days, I'm going to get a real digital camera, take the adaptor apart, and take some pictures (and then paint it black).  

I'm not sure about nuts for the holes in your dropouts. I just used 5mm bolts and drilled and tapped my adaptor. I didn't actually make a single modification to the frame.

And yes, that picture is a Hammerhead...