Great pics!
How the rounded surface is ground on the bottom of lifter in my pic above, I don’t know, but what puzzles me is how the flat bottom surface of the EF is done. The only cutting machine that leaves straight machining marks that I can think of is a shaper:
http://en.wikipedia.org/wiki/Shaper
But shapers are sooo obsolete. It takes forever to cut a flat surface on one of those, as compared to a milling machine.
And that’s why they haven’t been around for the last 50 years, or so.
Stupid question about valve play
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I remember the shaping machines from college, back in 1976. Great fun! Especially when you took a deep pass and the workpiece came flying out.Tapio wrote:Great pics!
How the rounded surface is ground on the bottom of lifter in my pic above, I don’t know, but what puzzles me is how the flat bottom surface of the EF is done. The only cutting machine that leaves straight machining marks that I can think of is a shaper:
http://en.wikipedia.org/wiki/Shaper
But shapers are sooo obsolete. It takes forever to cut a flat surface on one of those, as compared to a milling machine.
And that’s why they haven’t been around for the last 50 years, or so.
Can't see the EF being done that way? Could the marks be grinding marks?
