I am trying my first real project on my unimat, a PM Research Inc. model 2A/ 2B steam engine. An oscillating engine.
The Flywheel was relatively easy, but the cylinder barrel presents some problems.
First: which face should be done first? Seems like the face that meets with the frame should be first. But, if so, what is the best way to hold it while the milling is done.Trying to keep the face square with the cylinder and the bore presents quite a problem. I think I have the cylinder mounted so the bore and face are parallel within 0.003 inches, is that ok?
Second:Keeping the ends square with the bore and the frame mating surface also presents a hold-down problem.
I hope I am making sense. Any help will be appreciated.
Ed Wilks
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