Wednesday, March 26, 2008
Davis fork crown
This is a Davis sand cast fork crown from the 50's. The first two pictures show the crown in the untouched state. The crown is pretty crude to begin with. I refer to these sand castings as lumps of coal. It takes a great deal of labor to make them presentable. These castings make me appreciate the quality of investment casting. I wouldn't want to work exclusively with sand castings but occasionally it's fun.
I didn't like how the groove looked on this crown so I filed it with brass. Since the fork will be silver brazed the brass won't melt when I heat the crown up again during construction. You can see I removed a lot of steel in coming up with this shape. Additionally I thinned out the crown a great deal. I will thin it more after brazing up the fork.