The Alamo, And so it begins. - Page 10 - Graybeard Outdoors
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post #91 of 151 (permalink) Old 05-16-2019, 07:29 PM
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I should be clearer. And just to be sure I wasn't misunderstood. Are the bushing and boxings in the wheels straight or taper.


I know you have a straight axle.
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post #92 of 151 (permalink) Old 05-16-2019, 09:56 PM Thread Starter
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Quote:
Originally Posted by double d View Post
I should be clearer. And just to be sure I wasn't misunderstood. Are the bushing and boxings in the wheels straight or taper.


I know you have a straight axle.

Bushings in the wheels are straight.
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post #93 of 151 (permalink) Old 05-17-2019, 07:14 AM
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Great, then there will be no surprises.
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post #94 of 151 (permalink) Old 05-19-2019, 09:37 AM Thread Starter
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Heavy Metal!!!

Stepping the contour in the trunnion to fit the 12" I.D. pipe on the Bridgeport.



You are looking at over 200 lbs. of iron. A 20' stick of 3/8" X 4" flat bar weighs 102 lbs.
There is about 42' in these pictures. That weight does not count the 1/4" X 2" vertical cheek straps.



















The transom pieces ready for final sizing when I know the exact spread of the trunnion collar.


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post #95 of 151 (permalink) Old 05-19-2019, 08:17 PM
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Very Impressive work for sure. I have never been to the Alamo but I'll make the trip when this piece is on display.
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post #96 of 151 (permalink) Old 05-21-2019, 06:30 PM Thread Starter
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Still working on the trunnions. A very slow process.

Step downs.



First trunnion ready for final grinding.



Hand forged handles, rings, and eye bolts with hand done threads.



Iron work is dirty work!


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post #97 of 151 (permalink) Old 05-22-2019, 02:38 PM
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Wow you are moving right along. No real other input rather than it is going be very nice I think.
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post #98 of 151 (permalink) Old 05-22-2019, 04:11 PM Thread Starter
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One trunnion off the Bridgeport mill ready for grinding the final contour.
This only took me 35 minutes.

The next trunnion is going on the Bridgeport.
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post #99 of 151 (permalink) Old 05-23-2019, 04:01 AM
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Nice grinding. I think I would have welded it on and filled the gaps with weld instead of grinding.

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post #100 of 151 (permalink) Old 05-23-2019, 07:17 AM Thread Starter
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Quote:
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Nice grinding. I think I would have welded it on and filled the gaps with weld instead of grinding.



George,
That idea was considered. But I opted to grind it.
I have cut the 12" pipe into two halves. The trunnion outline was traced on to the pipe and cut out with a torch.
I will now grind the rough cut hole until the trunnion will slide in.
Then it will be welded on the inside diameter.


The second trunnion will start the contour process on the Bridgeport.
Then go through the same process as the first trunnion.


The pipe halves will be cut to final length after that and a flange welded on.


The finished trunnion in the picture started out as a 80 lb. 6" X 10" long piece of round bar.


That's 53 lbs. of waste cutoff of the original round!



I now estimate the finished collar will weigh about 75 to 80 lbs.


I knew from the very beginning that this project was going to have some very involved challenges but miscalculated on the amount of time it would take to finish the collar.
Still, I will get it done.
Just so everyone is clear, I have a friend helping me with the lathe and mill work. I don't have the skill nor the equipment to attempt this on my own.


I, however, will continue to practice my grinding skills.



More pictures to come.
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