After grinding on the bench grinder,
it left a bad finish and if you noticed in the picture above, I was also
grinding across the
grain of the material. Yes.....metal has a grain
just like wood does so it makes a difference which way you finish your
work as to how it performs later. This was a perfect job for the Dremel
again so I put a small sanding drum on it and smoothed things out.
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After a small amount of grinding, I
put the rod and piston back in and checked again. I had to do this about
six times before I had the .050" that I needed. Notice the bolts
below. Now notice the bolt on the right has a larger chamfer (on the
end) than the
other. I had to do this to make enough clearance because the end of the
bolt stuck out of the rod far enough to interfere with the
right amount of clearance. Now this meant I had to grind WAY more than I
planned on but it had to be done. If you remember on a previous page, I
talked about the small base circle cam that I was using? This smaller
base circle cam gave me added clearance that wouldn't have been there if
I had used a normal one so this was a wise choice I made when I bought
the cam. I can only imagine what the rods would have looked like after
grinding them if I had bought a standard base circle cam.
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Here you can see the difference
between the two rods. Notice the length difference from the rod bolt
hole to where the rod cap meets the rod! That's over 3/16" that
you see there. I hope it stays together......
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