Ok, got the new drill bits I needed, along with some other shop supplies, so I can pick up where I left off.
Since I now have my bolsters drilled to size, a couple of quick notes about drilling metals. Always use a center punch to keep the bit from walking when you start out. This keeps everything where it needs to be. Automatic center punches are fine, I use straight center punches.
Once you have it marked, make sure it is square to your bit. With small pieces I use my milling style x-y adjustable vise. Bring the bit down to just touching the surface of the part and travel the piece in both directions. If it digs in you know you have to lower it, if the bit comes off the surface you need to raise that side.
Now when drilling metals I use as slow as possible rpm. Use a good quality cutting fluid as well. Notice the chips of brass next to the bolsters in the above pic, that's how you want them to look, if they stop coming out like that, back the bit out and let it cool as well as add more fluid.
These holes are undersized by a small amount because I will ream them to size and then use a 2* tapered reamer to give the pins room to expand when I pein them.
Now that all my bolsters are drilled I have to prep them for soldering to the liners. (This pic is a little out of sequence). I am using bar stock brass whic is stamped to shape. It gets the typical convex top from this and may not be apparent at first glance. Here is one that I sanded on a surface plate (on the left) and one I just started to surface (on the right)
The dark areas on the edges are low spots. It isn't very much, but having true flat pieces is very helpful.
Next I am ready to begin the soldering process. Heating is the last step, because like most things all the work is in the prep. I won't go into great detail on the process I use (thanks to Stan Buzek for showing this method) but it is quite simple. Clean mating surfaces very well, apply flux, and then put smashed flat solder (4% silver 430* melting) on the piece and place the bolster on top. I use an old dull drill bit to line them up and clamp it together. Pencil lead on the drill bit and anywhere else I don't want the solder to go keeps it neat and tidy.
Take your torch and heat up the bolster first then move to the liner side and the solder will melt, then the clamp will bring the pieces together. If all went well you should have a nicely soldered joint like this...
I got a little bonus on the above joint, there is a small tear in the liner (I'm pointing to it) that filled in nicely when I soldered the bolster on.
Repeat the above steps three more times and you end up with the mother of all pillbuster patterns...!
A quick check to make sure I measured everything right and got the alignment of the bolsters right...
I know things look a little askew in the pic but trust me, it is just the pic.
Everything looks good and I had just a little time left before I had to get ready for work so I took one side down to close to the liner to see how it looks...
Looks like it is coming together nicely! Well I had to stop there for now. Hope you all are enjoying this journey of the One Trick Pony!
Stay tuned, more to come...
-Xander