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A premature notice, but a builder posted vids of his triples running on air on the MEM website. While many builders seem to have trouble getting these to run on air, he did a simple mod of putting a pair of very light springs on the valve nuts to keep the valves pressed against ports. He also...

Have you considered powder coating?

Jason's math is (15/37)/90 = 1/222. This works exact since 37 is a factor of 222.

For turning rectangular stock a 4-jaw chuck is preferable. If you are serious about machining your lathe needs one.

At least electric lawnmowers are pretty effective for normal lawns.

Different pressures with a micrometer can cause different readings unless yours has the ratchet mechanism. But very small variations won't matter. It's easier to get a fit by boring the cylinder first and turning the piston to fit.

Gives me another year to get the Greene engine done.:rolleyes:

In thinking about this procedure as well as the fact that my rotary table+chuck weighs as much as I can lift, being able to machine the gear without the rotab tilted would be nice. Since the goal is to be able to keep the tool parallel to the groove at all time, it seems to me that tilting the...

Since rotary tables like this use a worm gear to drive, I was wondering initially if reversing the rotation would induce too much backlash. It appears that the forward rotation for the next tooth does take up any that the reversing might cause.

That explains why I've never gotten it to release cleanly.

No one will peer underneath the manifold to see that pin.

What HP is the lathe motor? VFD is fine up to 2 HP, but they get expensive for larger.

What material(s) for the pins and plugs?

I've leaned this from Terry; allows all the surrounding bottom stock to milled away while holding the finished part, which would otherwise remain unsupported. Then the part is released by heating,

Do you put screws in the threaded holes before bead blasting?

Likely for the better as corner rounding mills don't give a 90 degree radius. As for the metric/inch issues, you could certainly generate the CAD model in metric. Then a newer version of Sprutcam and a faster computer could be used. The mill won't care.

Where did you order the 7075? I've only seen it locally in round rod.

With a 5-axis mill and tool changer, you'd knock those babies out quick. :D Lacking that it's a slog. That groover is a tight fit.

Tormach sells an automated saw that they demoed at CF a couple of years ago.

I have a set that gets used on occasion. But the 1" block I use as a tool setter on the CNC mill vey frequently.