[lerman]

I'm machining a manifold from 6061 aluminum. The manifold is part of an instrument and has many intersecting passages, some of them threaded.

They range in diameter from 7/64 to 7/16 inch. I have 5/16 holes intersecting the bottom of the 7/64 holes. I have perpendicular #17 holes where the bottoms meet at a right angle.

For the most part, I'm using roll form taps, but have been unable to find 7/16-20 roll form taps.

Any ideas would be appreciated.

Thanks,

Ken

Any suggestions on how to minimize the burrs and deburr these things?