Author Topic: Greene Automatic Cutoff Steam Engine  (Read 21894 times)

Online Jo

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Re: Greene Automatic Cutoff Steam Engine
« Reply #375 on: July 02, 2020, 05:21:31 AM »
Great news Kirk, give it time to sort itself out  ;)

Jo
Enjoyment is more important than achievement.

Offline Admiral_dk

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Re: Greene Automatic Cutoff Steam Engine
« Reply #376 on: July 02, 2020, 11:26:46 AM »
Quote
Great news Kirk, give it time to sort itself out  ;)

Amen to that, and best wishes

Per

Offline kvom

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Re: Greene Automatic Cutoff Steam Engine
« Reply #377 on: July 11, 2020, 08:04:40 PM »
I decided to get back in the shop for a couple of hours today working on parts that don't require too much close up vision (i.e., needed to switch to reading glasses).  My last attempt at the ball joint resulted in the pocket, drilled with a 5/16" ball mill, being too small for the 5/16 ball bearing.

Given that the ball will oscillate vertically, it seems that a cylindrical pocket would work as well and probably better.  The ball I have measure .32" on the mic, so I programmed a .32" diameter pocket .16" deep in the end of 1/2" diameter drill rod.  The square enclosure was increased to .34".  After milling the first half, I found that the ball fit quite neatly in the pocket and rotated smoothly under my finger.



The moment of truth came after milling the second and parting off both pieces.  The ends fit together well without apparently squeezing the ball.



The ends of both halves need additional operations, and the ball needs to be annealed, drilled, and tapped.