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  1. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, no worries here. It's been a very...

    Hello, no worries here. It's been a very enjoyable experience. I have learned so much about force and angles. I don't know what your referring to, being in error on your latest calculations. Your...
  2. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Well, that answers why I've been thinking I could...

    Well, that answers why I've been thinking I could make this work.
  3. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    I bet its me.....I can't link it but I can send a...

    I bet its me.....I can't link it but I can send a screen shot.
  4. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    See above post the pictures didn't attach for...

    See above post
    the pictures didn't attach for some reason.
  5. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Well dang it all. I've been using the Scissor...

    Well dang it all. I've been using the Scissor Lift Jack Force Bottom Load Calculator located here at this site and a have set my lift up exactly like it except for being upside down. What am I doing...
  6. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hi, I'm coming up with 30,000lbs, you have 2500...

    Hi, I'm coming up with 30,000lbs, you have 2500 each at the top pins and 10,000 at the center, should this be 5,000?

    I've shortened the arms by 2.5" and increased the vertical sleeves length 3"...
  7. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    See last post too. So the scissor formula tool...

    See last post too. So the scissor formula tool shows the cylinder horizontal but attached to middle off scissor. Would this arrangement be much different? Arms are the same except for the cylinder...
  8. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello! Very nice! Well this is a dramatic...

    Hello! Very nice! Well this is a dramatic improvement. Still a bit loaded on two of the pins though. I can see better what's happening but a also very surprised too.
    If the cylinder were placed...
  9. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, yes those dimensions are 36.34",133.15"...

    Hello, yes those dimensions are 36.34",133.15" and 180.86" Thank you for your efforts. Bart
  10. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, thanks for reviewing this for me. It will...

    Hello, thanks for reviewing this for me. It will be the lower beam. I did this is to allow for more room for the stack up of the scissors and better angle on the cylinder. The upper beam will also...
  11. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, great to hear your trip was pleasant and...

    Hello, great to hear your trip was pleasant and terrific to see your still interested in this project. Your calculations show the loads are just to extreme to be practical on my misguided design. ...
  12. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, unfortunately math is not my strong suit...

    Hello, unfortunately math is not my strong suit and not sure what you mean about the mechanical advantage being minimal. But I think I'm starting to understand then scissor design fully extended...
  13. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Right and the more a look at the scissor designs...

    Right and the more a look at the scissor designs the better they look. Lots of pieces though. But they are a lot lighter for me to machine. I found some scissor calculations where you pointed me to...
  14. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Yes, I sure have. Found some direct drive units...

    Yes, I sure have. Found some direct drive units 7000lbs at 1000$ so 4 ea would be pretty inexpensive really. Thing is with a boat
    Lift, If you do have a failure the water is a bit softer than...
  15. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, looks like I'm getting into the habit of...

    Hello, looks like I'm getting into the habit of thanking you. Looks great and just one question as I think you meant to state at the 8.5' it'll take 57k as on your schematic?
    I'm really curious...
  16. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Ah, ok here's the required dimensions. Please let...

    Ah, ok here's the required dimensions. Please let me know if there's anything else. Bart
  17. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Thanks so much for helping and also putting what...

    Thanks so much for helping and also putting what you need in red on a sketch. I got those for you. I'm really curious what you think I accomplished with the switch to pushing or did I lose most of it...
  18. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    OK I hope I understand what you need here. I'm...

    OK I hope I understand what you need here. I'm still mulling over your excellent explanation of flow with 4 pumps. Takes a long time for these ideas to sink in.
  19. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    797796798Hello, absolutely great stuff...

    797796798Hello, <br>
    absolutely great stuff here. This is really amazing and a bit over my head. Thank you for your patience as I digest this all. <br>
    I have added the platform weight into the...
  20. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello, Thanks for providing the links for the...

    Hello,
    Thanks for providing the links for the cylinders. They are very nice to work with.
    I'm open to any suggestions for design. The drive on floor mounted units are out as I need the floor...
  21. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Please see my above post. I can not find any...

    Please see my above post. I can not find any specs on my dual action cylinder retracting capacity. I've yet to find any tables for retracting verse extending strength differentials. Is it usually a...
  22. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello JAlberts, I'm honored that your spending...

    Hello JAlberts,
    I'm honored that your spending your time looking at this odd project. Thank you also for looking at the YouTube video. The six cylinder system is very interesting and also that...
  23. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hello JAlberts, I'm sorry for my inability to...

    Hello JAlberts, I'm sorry for my inability to design, clarify and understand the fundamentals of hydraulics.
    The cylinder has 36" travel and with four will have the colum load of 120,000 lbs.
    I...
  24. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Vehicle lift

    JAlberts,
    Thanks for pointing out the faults, and I have tried to redesign with better results this time. Yes, a cable system would be the best route. However, I have new USA made 36" hydraulic...
  25. Thread: Vehicle lift

    by Bart
    Replies
    52
    Views
    8,498

    Hi JAlberts. Thanks for your concerns. Yes, I...

    Hi JAlberts. Thanks for your concerns. Yes, I agree that this is really pushing the reasonable limits of force. But I think it may still work. The cylinder angles are not to severe at the 8' hight...
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