Thursday, October 8, 2009

Fixing a Rear Dropout

Fixing a rear dropout does not require replacement. This method is quick, and precise and strong. Timewise, shouldn't take more then 15 minutes to 30 minutes. This one took a little longer because i also drilled out the helicoil thread repair and brazed in a proper 10x1mm "sleeve" made from a nut.

Here is a pic after i straightened it best i could. I considered welding the crack as is, but i wouldn't have been able to get it straight.

Here i broke it. The big advantage then was i was then able to fix the thread and also face it in the lathe.
Next came proper alignment achieved by using two axles, nuts and visegrips.

Next i simply stick welded it with. Weld very hot and fast, chipped slag, and hit it again, and repeated 3 or 4 times until it looked good. Filed it flat (not shown) and was done. Will now work perfectly. This will be my sweethearts bike someday.., an old but cute and sturdy Bridgestone RB-1 road frame that i picked up for $40..

2014 comments.  As I look back at some of the things I did, this one was actually really good work, a great quality repair... .  I ended up not doing anything with this frame, and finally sold it, and hopefully it is being ridden around by a Portland hipster :)