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My first impression is that the drawings are really excellent and the castings are just a bit on the rough side.
Nice set of castings Five spokes on your flywheel that will be an interesting one to turn the outside rim.Jo
I share your sorrow, Mile, I use my collets a lot too. (But just a manual drawbar closer.)Hard to believe a manufacturer turned that bore with so little clearance, I wonder if the previous owner wanted to use a larger bar and had to skim it out.Will be interested in how you go in the thread cutting for the replacement. Please keep posting. Keeping the lathe in operation is surely relevant to the build.While on the topic, I often wonder just how much solid metal you have to leave between a thread and a hole through the centre. Clearly the root diameter is less than the tapping drill size, can be calculated, but what about any micro cracking from the threading process? And it has to be strong enough to take the torque from the thread cutting or hole boring process. One of those design decisions that always leaves me scratching my head.MJM460
Mike, I did measure the width of my flywheel today and it ended up at .506". You still may be ok at .375", but that is getting on the thin side. Given the large diameter, you may still have enough mass in the rimBill
Well, after a very long absence from any work in my shop or posting on this forum, due to various issues in life, I've made it back! Over the last few weeks, I've made a fair bit of progress on the PMR #1 kit and I'll catch up on my progress over the next few days and hopefully soon get caught up to present day. It's good to be back working in the shop again!
I think it adds a lot to the look of an engine to keep as much of the "as cast" surface as possible. Good job, in my book.
Great set up's & fixturing Mike! John
Quote from: Johnmcc69 on February 26, 2021, 03:49:31 PM Great set up's & fixturing Mike! JohnThanks! It turns out i've been spending a LOT more time thinking about how to hold the parts and creating the fixtures necessary vs cutting metal directly. I'm sure that's a common finding for most!Mike
You are really on a fast track forward with this build Mike and nice looking parts too Still following along
Great job on the crankshaft, some delicate work in there!