Main Piston 2
15-Jan-2005
The drawing calls for a 'F' hole followed by a
3/8-24 thread concentric with the outer diameter. A drilled hole is
nether round or straight. I decided to bore the center hole but had to
make a special tool to get into the small hole. I'll be the first to
admit that I don't have very good luck sharpining my own tools. This
one was no exception, but I somehow managed to make it work. I thinned
the section to the right of the tip and chamfered it to allow clearance
in the hole. I then took _very_ light cuts to bring the diameter to
0.352. I then mounted the tap in the tailstock and threaded the hole.