Scissor lifts or farm jacks.

hulkdriver

New User
Which one do you prefer for a high lift with heavy payloads? I am pretty confused on this point. My son told me that farm jacks may slip and need a perfectly flat surface for a heavy lift.
 

I don't know what a farm jack is but I have jacked my old post and beam barn a bunch of times. The key is to not have a narrow place, that would allow it to start bowing out to one side, anywhere near the middle. I start by digging down to the undisturbed clay hard pan, and build a pier of 4x8x16 concrete blocks, 6 of them. I will then stand a post such as an eight inch tree trunk or 8x8 PT post on the pier. I then set a hydraulic bottle jack on top of the post with a hardwood or steel bearing plate on top, then go to it. I will often put one of these on each side of a major post that has sunk. I don't see a scissors jack as having a place in high-heavy lifting.
 
(quoted from post at 08:39:54 02/09/17) Which one do you prefer for a high lift with heavy payloads? I am pretty confused on this point. My son told me that farm jacks may slip and need a perfectly flat surface for a heavy lift.

What are you lifting, how heavy, how high? It makes a big difference as to which tool.
 
Scissor jacks are nice for lighter loads were you can get in with a jack handle, say car jacks...

Farm jacks can lift lots to a point, can be used at slight angle front/back. Have to have a good base(so it don't sink or slide) and room to pry on the handle, slipping likely if gets off center (especially side to side) of lift. We've lifted a loaded smaller gravity box up with ours a few times, and slipped blocking under load to hold.

Hydraulic bottle jacks are often best bet for many tasks. Great for heavy loads (say setting barn timbers) and confined spaces(under tractors), can also be tipped more( say for nudging loads) then other jacks before it slips. If needed a post can be set on the jack to lift higher.
 
High Lift (a brand but commonly used for a type) is the only one i know of that has had issues. it is pure mechanical pin latch and
springs, with about 40 inches of travel. Good lubrication clean at the ratchet mechanism, and watching the pins on every stroke to
assure they are fully engaged as they trade places is mandatory. on the way down, as well as the way up. As with all mechanical
things, they are to be kept in operating condition. When they fail from lack of the above, they can hurt or kill. I own and use
one. Jim
 
Scissor lifts are for people to work at elevated heights, scissor jacks are for lifting specific vehicles that they were designed for. Farm jacks like a Hi-lift are great, but you have to oil them and understand them!
 
In the late 60's while in a training
program i was admonished for calling
them scissors; i was instructed to
call them: pantographs. A pantograph
(Greek roots παντ- "all, every" and
γραφ- "to write", from their original
use for copying writing) is a
mechanical linkage connected in a
manner based on parallelograms so
that the movement of one pen, in
tracing an image, produces identical
movements in a second pen. If a line
drawing is traced by the first point,
an identical, enlarged, or
miniaturized copy will be drawn by a
pen fixed to the other. Using the
same principle, different kinds of
pantographs are used for other forms
of duplication in areas such as
sculpture, minting, engraving and
milling.

Because of the shape of the original
device, a pantograph also refers to a
kind of structure that can compress
or extend like an accordion, forming
a characteristic rhomboidal pattern.
This can be found in extension arms
for wall-mounted mirrors, temporary
fences, scissor lifts, and other
scissor mechanisms such as the
pantograph used on electric
locomotives and trams.
 
A farm jack is one of the most dangerous things ever made. They have many uses, and work great as long as you know they are not very stable. BTW I own three of them.
 
(quoted from post at 22:30:41 02/12/17)
please check this
45580.jpg
 




This is for multi proposed
*need to access old toys from the mezzanine (currently I am using Chain Pulley Block to lift loads up and down)
* Jacking and for inspections and repairs under the vehicles (this is where my son told me that farm jacks may slip and is not safe)

What about this?
http://www.pentalift.com/lift-tables/prodinfoDSL.php
Got this site for scissor lifts for mezzanine access. Do you guys suggest this type of double sea lift for this kind of applications? :?: :idea:
 
(quoted from post at 22:49:36 02/12/17)



This is for multi proposed
*need to access old toys from the mezzanine (currently I am using Chain Pulley Block to lift loads up and down)
* Jacking and for inspections and repairs under the vehicles (this is where my son told me that farm jacks may slip and is not safe)

What about this?
http://www.pentalift.com/lift-tables/prodinfoDSL.php
Got this site for scissor lifts for mezzanine access. Do you guys suggest this type of double sea lift for this kind of applications? :?: :idea:

Do I understand you to be asking what would be a good lift for both lifting vehicles for service and for getting heavy things down from your mezzanine? Given that mezzanines are at least eight feet high, I don't see how the high lift (farm jack) could possibly work for that. High lifts require great care and vigilance when using them simply because the bearing points both top and bottom are so narrow. They kick out or tip over easily compared to other jacks. I use a forklift for getting things down from my mezzanine, and frequently for lifting vehicles. A scissors lift would probably be good servicing your mezzanine but I can't see how you could use one for jacking vehicles. The load needs to be close to centered, I don't see how you could do that under a vehicle.
 
I agree. I just don't see how you can possibly expect one tool to perform both jobs. Especially, a hi-lift jack.

A scissor lift with the capability to lift 8' high will be very "thick" when fully retracted. The platform will be 12-18" off the ground. You will still need a way to lift your toys on and off the platform to the ground, so you will probably still need your chain hoist.

The scissor lift is probably also too tall to fit under most vehicles. Even if it does fit, the platform will block access to the underside of the vehicle.

To me, I would stick with the chain hoist for the mezzanine, and get yourself a good hydraulic floor jack.
 

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