Author Topic: Flyboy Jim's PM Research #5  (Read 14196 times)

Online crueby

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Re: Flyboy Jim's PM Research #5
« Reply #225 on: November 20, 2020, 03:23:49 AM »
Hey Jim, great to see you back at this engine!   Nice results on the crankshaft.   :popcorn: :popcorn:

Online propforward

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Re: Flyboy Jim's PM Research #5
« Reply #226 on: November 20, 2020, 03:31:42 AM »
Nice work Jim. Good to see you back in the shop.
Stuart

Offline Flyboy Jim

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Re: Flyboy Jim's PM Research #5
« Reply #227 on: November 20, 2020, 02:54:07 PM »
Thanks Chris and Stuart. Hopefully I can get out to the shop for a while each day and get this project finished up. I've been getting caught up on both of your build threads, which really helped me get going again.

Jim
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Offline Flyboy Jim

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Re: Flyboy Jim's PM Research #5
« Reply #228 on: November 24, 2020, 04:23:53 PM »
Got started on the Connecting Rod.















Still finish work to do, but it's now capable of doing what a Connecting Rod does best...............connect one thing to another thing.  :)

Jim
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Online propforward

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Re: Flyboy Jim's PM Research #5
« Reply #229 on: November 24, 2020, 04:44:15 PM »
That's looking great Jim, nice work.  :ThumbsUp: :ThumbsUp: :ThumbsUp: :ThumbsUp:
Stuart

Online Bear

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Re: Flyboy Jim's PM Research #5
« Reply #230 on: November 24, 2020, 07:33:07 PM »
Looking good  :cheers:.

Online crueby

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Re: Flyboy Jim's PM Research #5
« Reply #231 on: November 24, 2020, 07:37:15 PM »
 :popcorn: :popcorn: :popcorn:

Offline gary.a.ayres

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Re: Flyboy Jim's PM Research #5
« Reply #232 on: November 24, 2020, 10:33:23 PM »
Nice work on that conrod.

Online Dave Otto

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Re: Flyboy Jim's PM Research #5
« Reply #233 on: November 25, 2020, 12:27:23 AM »
Good to see progress Jim!
The crank and rod look great!

Dave

Offline Flyboy Jim

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Re: Flyboy Jim's PM Research #5
« Reply #234 on: November 25, 2020, 03:01:35 AM »
Thanks guys. It feels good to make some forward movement before I completely forgot everything.

Jim
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Offline Flyboy Jim

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Re: Flyboy Jim's PM Research #5
« Reply #235 on: November 25, 2020, 05:25:45 PM »
Got started on the Eccentric casting.









Went back and forth milling each piece until it had something that resembled a round opening when assembled.





Next up is to mill the sides to proper thickness and bore the opening.

Jim

PS: The plans call this the "Eccentric" and what I thought was the Eccentric, they call the "Eccentric Hub". Isn't this actually the "Eccentric Follower"? Color me confused.  :-\
« Last Edit: November 25, 2020, 06:25:08 PM by Flyboy Jim »
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Online crueby

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Re: Flyboy Jim's PM Research #5
« Reply #236 on: November 25, 2020, 05:55:18 PM »
 :popcorn: :popcorn: :popcorn:
Uh oh, gotta go pick up more popcorn!

Online propforward

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Re: Flyboy Jim's PM Research #5
« Reply #237 on: November 25, 2020, 06:30:54 PM »
Mr Jim, did you clean up the sides of that eccentric in some way before mounting in the vice for drilling, and also, what size milling cutter / face mill / fly cutter is that please thank you please?
Stuart

Offline Flyboy Jim

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Re: Flyboy Jim's PM Research #5
« Reply #238 on: November 25, 2020, 07:06:45 PM »
Mr Jim, did you clean up the sides of that eccentric in some way before mounting in the vice for drilling, and also, what size milling cutter / face mill / fly cutter is that please thank you please?

The sides of the casting were quite flat. I just sanded them a little on my surface plate and they clamped just fine. In retrospect......I should of milled them flat, not necessarily to final thickness, before clamping. One of those things that slipped through the cracks. I will mill them flat before boring.

All the milling operations were done with my Sherline flycutter: https://www.sherline.com/product/7620-single-flute-insert-fly-cutter/
I use the fly cutter whenever I can since using the end of an end mill doesn't give as good of results with the Sherline mill.

Jim
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Online propforward

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Re: Flyboy Jim's PM Research #5
« Reply #239 on: November 25, 2020, 07:17:04 PM »
Excellent. Yes, seems like prepping the sides is a good idea. I was thinking through that because Iím coming up on these parts myself. Seemed like sanding one side flat was a good way to go. Looks like it has worked out well. I lije that flycutter and I remember asking you about that before now. Nice - good results.
Stuart