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The pattern could not be seen before the facing cut. From the way drills and the end mill reacted, there were hard spots in the casting. Don

Thanks for all the input. I did flip the flywheel and do a face cut and the pattern does go through. It does not have the 6 small dots on the second side (first photo). I also faced the first side to final size by taking another .o25 facing cut. The pattern looked like it was starting to go...

WOB Thanks fo your input. I do have a small carbide tipped boring bar and used it to finish the bore of the first flywheel. Your suggestion of starting with a carbide end mill sounds good. Thanks Don

I am working on a Red Wing water cooled kit from PM Research. I had an issue getting a drill to run true when drilling the flywheel hub prior to boring and reaming. On the second flywheel I noticed a strange pattern on the face of the hub after I took a facing cut. There is a light colored disk...

Sorry to say I can not make it this year.

Paul I am about a mile out of Clarksville. I agree figuring out fixtures and machining sequences are part of the fun. Maybe we could meet for lunch some place in Lebanon. Don

As suggested here are photos of my engines if I have figured how to post photos.

I have been watching and learning from this forum for several years and decided it is time to introduce myself. I started my modeling in the late 90's buy buying a 8 x 20 Grizzly lathe and a RF30 mill/drill. I started with small steam engine kits and worked up to a PM Research #4. I then built a...