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  #21  
Old 02-03-2020, 10:41 PM
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Thought share some more pics from work machining. These are from small cylinders. They are some sort of locking cylinder, as they stroke out, the rod turns and holds something. Both cylinders came to us with the rods bent. We had to cut the rods off in order to get them out, but the heads were rusted in. I had to machine the heads out, and make new ones from aluminum. Tomorrow will be making the rod repairs. Saving 1/2 the rod with the piston, and making the other end that will thread into the piston and be tig welded.
The pic with the threads is after I chased the threads and cleaned them up. They were 48 mm x 1.5mm pitch.


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  #22  
Old 02-03-2020, 10:44 PM
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More pics. First is the parts of the second head that I removed. The first one was in more chips.
Nice when I get the old threads to just peel right out.

The next two are the new heads.

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  #23  
Old 02-03-2020, 10:48 PM
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Lubing up the threads with anti-seize upon assembly?
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  #24  
Old 02-04-2020, 06:56 AM
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Quote:
Originally Posted by milomilo View Post
Lubing up the threads with anti-seize upon assembly?


They will be this time, along with a Oring dirt seal at beginning of threads, and a nylon insert to keep head gland from unscrewing, until we want it to upon rebuilding in the future.


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  #25  
Old 02-04-2020, 09:21 PM
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Quote:
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Coworker asked me if I wanted a challenge yesterday. He need a thin seal install bushing made to install a $200 seal without cutting it on sharp edge of a hydraulic motor shaft. ...
I think I'd have used nail polish to build up a temporary ramp on the shaft by the sharp step. Or that thin aluminum tape used for duct work. But I did live in a third-world country for a few years.
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  #26  
Old 02-05-2020, 09:42 PM
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Finished the parts for the two little twisting lock cylinders today. Now the mechanics can put them together.
Pics a little out of order. The second one is the pistons I made. Originally, we were going to use old ones, but when I was verifying the piston dimensions, I found the old ones under size in the steps for the seals we ordered. Decided to just make the rod and piston completely new, and move on. I had to wait to make the smaller rod end til I got new nuts to make the threads to. So I forgot to get pics of the other half of the rod. Basically they’re were threaded together and then tig welded. I then machined the weld so the rod will slip into the head as needed.

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  #27  
Old 02-05-2020, 09:45 PM
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I had to turn two 24x 2mm nuts down to .446” long for jam nuts. I took a piece of the 25mm chrome rod that I had accidentally cut two long, and ran the 24x2 thread on it, then threaded the new nuts on it for parting down and chamfering. When I got done, I realized I had two very thin jam nuts left over.
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  #28  
Old 02-06-2020, 10:38 AM
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Originally Posted by toprecycler View Post
I had to turn two 24x 2mm nuts down to .446” long for jam nuts. I took a piece of the 25mm chrome rod that I had accidentally cut two long, and ran the 24x2 thread on it, then threaded the new nuts on it for parting down and chamfering. When I got done, I realized I had two very thin jam nuts left over.
Attachment 154651Attachment 154652


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Nice finish on the parts.
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  #29  
Old 02-06-2020, 06:05 PM
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Looking good! Nice work.


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  #30  
Old 02-06-2020, 09:19 PM
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Some of today’s work. A barrel, Rod and brass gland for a little tie rod cylinder, and getting set up to machine the base out of the bigger cylinder. The head is locked up and will not unthread. The piston had come off the rod inside, due to the machine having no stops set up on it, so the load is always pushing against the head or base, and these cylinders are getting their a$$ beat up. Loggers have a tendency to do that. Probably will be making a new rod, and machining the head out and then making a new head too. And figure out a better locking system for the piston.


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