Author Topic: The "Little Pearl" Single Cylinder Marine Engine  (Read 61261 times)

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #495 on: June 14, 2018, 01:07:00 AM »
I got the piston valve done today. I needs a close fit to the .515" reamed hole in the cylinder. The closest size I had was .750" so I started with that an turned it down until it just fit the opening in the cylinder. The valve was then drilled with a #11 drill for most of the way through and then finished with a #21 the last little bit for tapping 10-32. This also allowed tailstock center support for the rest of the turning (photo 1). The narrower part in the center section of the valve was roughed out with tool shown in photo 2 and then finished with a ground round nose tool to form the radius at each end (photo 3). Once it was parted off and the cut off end faced to final length, both ends were counterbored .025" deep by .375" diameter and the threaded end was tapped (photo 4). The finished piston is shown in the last photo, Tomorrow, I will make the shaft that completes the piston valve assembly.

Bill

Offline zeeprogrammer

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #496 on: June 14, 2018, 03:57:03 AM »
It's been a while.

You know what I'm going to ask.  ;D
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #497 on: June 14, 2018, 12:02:52 PM »
Zee, if you are asking about the shop renovation, nothing on that front in the last few days as it has been a bit wet to do much outside, hence the posts on the little pearl and #5 instead. Back to the renovation as soon as I can do some more outside work. Meanwhile doing some research on new siding, windows and roof for when the deforestation is complete :)

Bill
« Last Edit: June 14, 2018, 12:06:28 PM by b.lindsey »

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #498 on: June 14, 2018, 12:13:26 PM »
On another note though, the 5/8-18 plug and bottoming taps I ordered for threading the top and bottom of the piston valve bore should be here today.

Bill

Offline Tennessee Whiskey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #499 on: June 14, 2018, 01:52:10 PM »
I think he wants a family shot Bill.

Cletus

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #500 on: June 14, 2018, 02:38:52 PM »
Ah, ok....one never knows with zee. But I can do that asily enough.

Bill

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #501 on: June 14, 2018, 03:02:26 PM »
Here you go zee....

Offline zeeprogrammer

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #502 on: June 14, 2018, 03:13:55 PM »
 :ThumbsUp:

That's looking great.

The renovation questions will start once I see you actually renovating.  ;D
So far all I've seen is pictures of a stroll in the woods.  :ROFL:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline bent

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #503 on: June 14, 2018, 04:31:40 PM »
Nice lookin' pile of bronze, Bill!

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #504 on: June 14, 2018, 08:22:30 PM »
I ain't even gotten to the woods yet zee!! Going to have to spray a lot of Roundup too though. Did get a bit of poison ivy,  but fortunately not overly sensitive to it.

Bill

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #505 on: June 16, 2018, 02:38:52 PM »
Back to the piston valve stem and assembly this morning. Just a few pictures below. I will say that I often have trouble holding in this case 3/16" drill rod securely enough in the three jaw chuck to keep it from turning while trying to thread it. Same for the WW collets in the sherline. This time I used the double angle collets in the Cowells and it worked like a charm. More bearing area I suppose against the stock, didn't even offer to slip!!

Bill