Hi Gang,
Since I was waiting for my buddy to shear up some more saw plates for an upcoming order I decided to work on these saws. Now that the handles are 99% completed I need to start detailing the saw plates. That means:
- Adding the nib
- Transferring the holes from the handle to the saw plate and then drilling them
- Sanding and polishing the saw plates
Back a couple years ago I made a short rip saw from some spare parts I had laying around. Back when I first made the saw plate Bob Rozaieski gave me a great technique for adding the nib. And all you need is a vise and a triangular file (I used a No7 Slim taper)
Below you can see the two saw plates as well as the short rip saw that features the nib. I liked it so much that I decided to use it as a template
So I broke out the black Sharpies and traced it onto the saw plates
The I clamped it in a vise and started filing
Did you guys know that if you hold a saw plate like I show and THEN try to file you make more noise than a 747 taking off?
Because of the noise
I ended up switching to my face vise in lieu of using the metal vise shown in the photos. While I had to bend over more, it went a lot smoother. And QUIETER.
Now that the nibs are done I needed to transfer the holes from the handle to the saw plates. I use the handle as a template and a set of transfer punches. During this process I clamped the saw plate securely. I also had a hold down on the handle but I added that after the photo
Once the holes were located I used a punch to deepen the "dimple" a bit. The dimple really helps to center the bit and positively locate the hole.
At the drill press I used a carbide bit I got from ENCO. And as I have said in the past (and will again now), if you need to drill more than a couple holes in spring steel,
BUY A CARBIDE BIT! While they are expensive, you will thank me afterwards.
A sharp carbide bit will go through spring steel with very little effort. Just be sure to use a nice slow speed and some kind of cutting fluid. I used WD-40. And the nice thing is that those carbide bits CAN be sharpened with a Drill Doctor.
Once the holes are done it's now time to start cleaning up the saw plates. As you can see below they are somewhat tarnished from their year(s) languishing in the shop waiting for me to finish this project.
I found that one trick to getting a nice shine on the spring steel is to work on a nice flat surface. I have a piece of MDF that has a cleat added to it so that it can be held in my end vise. The MDF is nice and flat and has been given several coats of Polyurethane.
I started off with 220 grit sandpaper backed up by a wooden block. In order to get the best finish possible, you need to reduce the chance of making more scratches than necessary. You do this by taking nice even FULL LENGTH strokes. That means no changing direction in the middle of a stroke. That will cause little "vee shaped" scratches. You need to sand forward the full length of the saw plate and then come back the full length. I sanded until I ended up with the finish below.
Then I moved up to 400, and then 600 grit.
I'm not really done yet. I wanted to sand up to 800 grit and then polish the saw plates a bit. But it was getting late and I need to call it a night.
To be continued......