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Technical Electric hoist. Ft/min

Discussion in 'The Hokey Ass Message Board' started by Budget36, Aug 16, 2025.

  1. Budget36
    Joined: Nov 29, 2014
    Posts: 15,200

    Budget36
    Member

    Do you use one?

    HF has them at 33/ft/min, my hoist is DOA, yes, I can double it back up, and slow it down to 16.5 ft/min, but I need 22 feet of line, and might be stuck with the 38 feet it has.
    So I guess the question is say pulling an engine, is 33 ft/min too fast/quick?
    As I mentioned my old gear drive Budjit hoist just hums, I don’t have time to repair it or have it repaired right now.
    Hence the HF one in question.

    thanks
     
    chryslerfan55 likes this.
  2. You can drive it through a VFD (variable frequency drive) and then set the frequency to get a slower speed. They are available cheaply on the intraweb. I also have a Budgit 3-phase unit (a rare bird here, as it is made for the U.S. 240v 3phase supply), and use a VFD to convert our single phase supply to 240v 3phase, with the speed control as a bonus.
     
    Budget36 likes this.
  3. Budget36
    Joined: Nov 29, 2014
    Posts: 15,200

    Budget36
    Member

    We’re single phase 240/220 here, I know about VFD’s, but only in 3 phase.
    I’ll have to search out single phase VFDs.
    But the 3phase VFDs we have at work would even exceed the cost of another geared hoist.
    Maybe someone makes a “budjit” priced VFD;)
     
    gimpyshotrods likes this.
  4. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,476

    gimpyshotrods
    ALLIANCE MEMBER

  5. Budget36
    Joined: Nov 29, 2014
    Posts: 15,200

    Budget36
    Member

  6. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,476

    gimpyshotrods
    ALLIANCE MEMBER

    Nonsense. I shall do no such thing!

    I probably solve just about as many problems as I create.

    I just don't tell you about the ones that I create!
     
  7. Mimilan
    Joined: Jun 13, 2019
    Posts: 1,247

    Mimilan
    Member


    Better still change it to Dyneema Rope.
    It is really easy to splice
    3/16" rope has the tensile strength of 5200 lbs [compare that to the McM Carr ropes]

    upload_2025-8-17_17-59-48.png

    Dyneema wont amputate body parts if it breaks. [just be careful with some oils]
     
    Budget36 likes this.
  8. gimpyshotrods
    Joined: May 20, 2009
    Posts: 24,476

    gimpyshotrods
    ALLIANCE MEMBER

    You are comparing two ratings that do not match each other.

    The number on McMaster-Carr is the working load rating.

    The numbers you provided is the minimum break strength.

    You have missed the safety factor. That is expressed as a ratio of the minimum break strength to working load limit.

    In the US wire rope is not sold by minimum break strength. It is sold by working load limit.

    The OSHA 1926.1414, ASTM A1023 and MIL-DTL-83140 safety factors for wire rope used in construction are 5:1.

    That means that the minimum break strength of what I posted is at least 5x of the working load rating, but even that is not all of what is at play here.

    Several of those wire ropes are made to the Fed. Spec. RR-W-410. The safety factor there is 10:1!

    By OSHA/ATSM/MIL-DTL standards, the synthetic rope that you posted has a working load rating of 1,040lbs.

    By Fed. Spec. RR-W-410, the synthetic rope that you posted has a working load rating of 520lbs.
     

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