Author Topic: The "Little Pearl" Single Cylinder Marine Engine  (Read 44528 times)

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #420 on: February 10, 2018, 05:18:09 PM »
Thanks Kim. There is a LOT more work needed on the cylinder...it will be a multi step process for sure.

Bill

Offline bent

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #421 on: February 12, 2018, 04:36:22 PM »
Looking more cylindrical every day!

Offline zeeprogrammer

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #422 on: February 13, 2018, 12:13:23 AM »
Drumming fingers here. Something about a family shot.  ;D
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
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Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #423 on: February 13, 2018, 12:21:10 AM »
Maybe by the weekend Zee, but not promising, or put another way ....some weekend soon. Depends on how busy work is this week.  :naughty:

Bill

Offline zeeprogrammer

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #424 on: February 13, 2018, 01:58:12 AM »
Maybe by the weekend Zee, but not promising, or put another way ....some weekend soon. Depends on how busy work is this week.  :naughty:

Good grief. You sound like Chris.  :lolb:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline crueby

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #425 on: February 13, 2018, 03:12:41 AM »
Maybe by the weekend Zee, but not promising, or put another way ....some weekend soon. Depends on how busy work is this week.  :naughty:

Good grief. You sound like Chris.  :lolb:
I resemble that remark! Or I will, maybe later, plans are changing. I think...   :Lol:


 :cheers:

Chris


Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #426 on: February 13, 2018, 12:04:13 PM »
We learned from the best Zee  :lolb:

Bill

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #427 on: February 19, 2018, 01:25:10 AM »
Not as much progress as I had hopped for this weekend but got closer to finishing one of the eccentric straps. After milling the "ears" to the needed top to bottom distance on both sides (photo 1) and making the four screws to join them (photo 2), it  was off to the rotary table to round the outside to the needed diameter (photo 3). As you can see in photo 4, rounding the upper quadrants required cutting into the head of the screws a bit, so they will all need to be remade but that is not big thing. With that done, the width dimention of the "ears" was narrowed again on the rotary table (photo 5). In photo 6 you can see the difference in this strap vs. the one not done yet. Finally, the top of the strap was machined round as shown in photo 6. I still need to finish the height of this and drill and tap 10-32 for the eccentric rod. Once this is done, the same  steps need to be done on the second strap, but I have the procedure down now at least so it should go faster. Both straps will still need an oil hold added as well, and the eccentric hubs need to be drilled and tapped for set screws. The cylinder is too large to hold in the Sherline mill vise so further work on it will be done at work. I am also hoping to get the base plate drilled/bored/reamed for the crank bearings. Again that will need to be done at work.

Bill

Offline Dave Otto

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #428 on: February 19, 2018, 01:30:42 AM »
Nice progress Bill!

Dave

Offline crueby

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #429 on: February 19, 2018, 01:32:29 AM »
Nice details on the straps, taking that cut on the side adds a lot.

 :popcorn:

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #430 on: February 19, 2018, 01:36:48 AM »
Thanks Dave. It wasn't as much as I had hoped but these eccentric straps have been rather fiddly and aren't my favorite parts to work on, but they must be done, and I am happy with the results so far. Going back to the castings, there was a lot to be removed to get to this point.

Bill

Offline 10KPete

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #431 on: February 19, 2018, 01:37:17 AM »
The 'extra' work really makes a difference in looks. And it looks great!!

Pete
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Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Offline b.lindsey

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #432 on: February 19, 2018, 01:37:42 AM »
Thanks Chris and Pete, I was typing as you guys posted.

Bill

Offline zeeprogrammer

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Re: The "Little Pearl" Single Cylinder Marine Engine
« Reply #433 on: February 19, 2018, 03:29:56 AM »
Nice shot using the parallels to hold that part.
That wouldn't have occurred to a lot of people (like me).

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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 #434 on: February 19, 2018, 11:43:54 AM »
Glad you pointed that out Zee. As it turned out, they were a bit springy and after a close call I replaced them with two 1/4" square tool blanks which were more rigid. The other thing was that since I was only holding one half of the strap, there was a tendency for the legs to be pressed inward as the bronze is somewhat soft. Using the live center helped. The best set-up would have been to chuck the entire strap with the two halves joined but in my case the depth of the jaws was not sufficient to do that. Long story short, it worked, but required very light cuts, so I would not recommend it. I was lucky I didn't kill the part perhaps.

Bill