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Type: Posts; User: JayBee44

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  1. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    Just another update for anyone finding this thread through Google searches etc.. The snap ring solution is finally failing me after about 6 years. I almost ruined a 40 minute cut yesterday when...
  2. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    Just thought I'd update this thread. The snap ring solution on the top side of the bearing is still working fine for me since my main issue was the bearing sliding/dropping down. I also wanted to...
  3. Z Axis Clunking - PSA: Check the tightness of screws for lead screw bearings.

    TL;DR version: Had a random clunk and occasional bind on Z axis. One of the screws holding the top Z axis lead screw/threaded rod bearing had worked loose a small amount. It was barely rubbing the...
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    Ferrites - Which ones are right?

    I'm sure this will likely end up being one of those, "how long is a piece of string?" questions, but here we go. . .
    I have one of the auction site Chinese bench/desktop CNC engravers. (The 3040 T/D...
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    Re: CNC 3020T-DJ Spindle Control, JP-382A JP-1482

    I was messing with things this weekend and managed to use that post (and a couple others) to successfully get spindle on/off working via software and get my estop so it actually functions on my...
  6. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    It definitely sounds like there's a difference in construction between your machine and mine. If I recall correctly for the z axis on my machine the linear bearings extend slightly past the aluminum...
  7. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    Agreed that the loctite specifically for press fit bearings, pins and sleeves is probably a better choice than the basic threadlocker. Although I have worked with the red loctite around cars and...
  8. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    No. They aren't included with the machine. I had to purchase them. In my case it almost looks like they should have been installed but the manufacturer doesn't due to the press fit and the fact that...
  9. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    Don't like to bring threads back from the dead but I felt this was one of the rare cases where it is appropriate. I ended up simply installing the snap ring in the groove on the bearing and it worked...
  10. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    You're probably right. I'll give it a go. In the event these cheap chinese bearings fail I'll worry about it then. Thanks again!
  11. Re: Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    Thanks Jim. I had thought of red loctite myself but I'm a bit leery. If and when it comes time to replace these bearings I imagine it may be a nightmare to get out? I'm not sure it would press out...
  12. Chinese 3040 CNC With Loose Z-Axis Linear Bearing

    I'm a newbie to hobby CNC but I've been using an ebay Chinese 3040 CNC for a few months now. Up until today I haven't had any problems. Today I noticed one of the Z axis linear bearings has somehow...
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