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Type: Posts; User: DennisCA

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  1. Replies
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    Well today I managed to make the 3rd gear move...

    Well today I managed to make the 3rd gear move axially, finally (!) I have managed to press it further out than before now but it stops after a while.

    I am pretty sure the reason it's stopping is...
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    I'm fully prepared for the idea that I have to...

    I'm fully prepared for the idea that I have to destroy the shaft. But as I've written earlier, I want to rebuild the shaft in that case. Ideally I'd get it out as completely as possible. I have...
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    I've been working on that, by hand though. But I...

    I've been working on that, by hand though. But I am otherwise engaged this week, so many other things, and a lot of things I've neglected in my focus on this. I've thought about motorizing the...
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    Managed to grind through the broken drill bit...

    Managed to grind through the broken drill bit piece though there are still pieces left I can see, I made another extension to be able to get it all the way in.

    https://i.imgur.com/AP9tF8G.jpg
    ...
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    There is some initial flex I have not been able...

    There is some initial flex I have not been able to get rid off despite all the extra stuff I've stuck on, not sure if it's the finger behind the gears or not that bends a little, I've considered...
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    I've been working on a pusher this weekend, it...

    I've been working on a pusher this weekend, it started as a simple U shape but I kept adding on bits to increase the stiffness but nothing, it won't move a millimeter. I've got the fine threaded M16...
  7. Interesting I did not know that the splashing of...

    Interesting I did not know that the splashing of oil also lubricated the Y-axis slide ways, I thought the oil container in the headstock did that solely via the wicks.
  8. The oil that came out of my gearbox smelled rank,...

    The oil that came out of my gearbox smelled rank, truly awful smell. I too found aluminum particulates in the oil, the previous owner machined a lot of aluminum as I have found it in every nook and...
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    I removed the bushing tonight but it seemed this...

    I removed the bushing tonight but it seemed this was a waste of time, no more space was gained as the first gear also stops against the bushing of the lower axle. I would have to remove that too in...
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    That seems like an interesting compound, I did...

    That seems like an interesting compound, I did some research and apparently the key to it's claims is due to the abrasive which is made from garnet.

    It seems very expensive, but I have been able...
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    Worth a try I suppose, once I get the bushing off...

    Worth a try I suppose, once I get the bushing off I should be able to separate the gears further and have better access. I have some 320 grit "E-Z bore" lapping compound already, maybe that could...
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    Yes the drill never got that far before it broke,...

    Yes the drill never got that far before it broke, nowhere near even.

    I purchased an M16 rod today, fine thread pitch and some nuts, to make a pusher. I also removed the set screw holding the...
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    Well, I think the bushing is the first order of...

    Well, I think the bushing is the first order of business. Depending on how much more axial space it allows me, that can alter how to best proceed. I assume it will slide hammer out after the set...
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    The thickest steel I could get behind the 3rd...

    The thickest steel I could get behind the 3rd gear is 6mm, if I where to remove the front bushing though I think I could increase it by quite a lot, maybe I could get 12mm steel in there. I could...
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    maxspongebob I am not sure that the thickness of...

    maxspongebob I am not sure that the thickness of plate I could get in behind the gear would be stiff enough.

    At any rate I don't see how I could possibly destroy it beyond repair, even if the...
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    Well that tears it. Broke off the tip of the dril...

    Well that tears it. Broke off the tip of the dril in the key slot. I was worried it would happen. I don't know, feels I am back to square one now.

    I am contemplating sacrificing the shaft, I've...
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    I have such an idea for stand by, but I wouldn't...

    I have such an idea for stand by, but I wouldn't drill the casting, I'd remove the bushing to get greater access and then drill, and I'd put the force not against the casting but the center hole of...
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    I thought of that design but I do not have the...

    I thought of that design but I do not have the material at hand to make such a version, and all this needed was to push the two gears back in place so I did not think I needed that much strength for...
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    It does sound like a tempting solution, though I...

    It does sound like a tempting solution, though I am afraid it means the machine will be weakened in certain gears and might snap more easily, it would be like a cloud hanging over my head when I used...
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    Something like that has been suggested and I...

    Something like that has been suggested and I think it could perhaps be doable, but I am worried it would make a weak solution and risk breaking again, and possibly leave me in a worse position if it...
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    You are right I believe, that is how it ought to...

    You are right I believe, that is how it ought to work, retained by the bearings, that should be more than enough IMO.

    But on my machine, all three gears are stuck more than normally. The two...
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    You have it mostly right, the two first gears are...

    You have it mostly right, the two first gears are not rotating freely on the shaft either (nor axially), they still have the key under them and they are quite stuck to the shaft as well, but not as...
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    I wonder if it could be made stiff enough myself...

    I wonder if it could be made stiff enough myself given the size limitations
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    The biggest problem there I believe is the amount...

    The biggest problem there I believe is the amount of available space behind gear 3 and the casting, only very thin metal fits in there and I think it would all need to be made from thick box section...
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    Well I thought this looked like a fun project:...

    Well I thought this looked like a fun project:
    YouTube

    I have also thought about making my own parallel pliers, though they are not so expensive online.

    A hemingway kit rotary broach is...
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