<VV> EZ Lift

[RoboMan91324 at aol.com]

Mike,
 
I saw the prototype demonstration.  It is a clever and  safe design.
 
It has been a long time so I don't recall if there is a  mechanical catch 
but the design uses two Acme type screws instead of ball  screws.  Acme 
screws are less efficient and require much more force to move  than ball screws.  
In this application, the Acme screw gives two  benefits.  First, they are 
cheaper.  Second, the force required to  move the screw in relation to the 
nut is great enough that the car and lift will  not fall on its own.  You must 
use the drill to both raise and lower  the lift.  In effect, you must both 
force it up and down.  The heavier  the car, the more force required to both 
raise or lower it.  Buy a heavy  duty, reversible drill.  Also, brace 
yourself for  significant torque/kick-back on the drill when you first start  it. 
 Keep this in mind, you are holding a hand drill so if the lift was capable 
of lowering itself, once you released  the mechanical catch (if any) the 
lift would back drive the screw and scissor  system before you could shift 
from the safety catch to the drill with  potentially disastrous results.  Also, 
you might be tempted to put the  drill on "auto" so you don't need to keep 
holding the trigger.   Don't.  If your greasy hand slips off the drill, it 
will spin and wrap up  the cord until the cord is pulled from the outlet by 
you or the drill.  The  good news is that in this case, the drill body will 
spin, not the drive on the  lift.
 
With that said, the lift may still have a mechanical  catch.  If this is 
still a concern, check with Boytcho for that  info.
 
Have safe fun with it.
 
Doc
~~~~~~~~~~~~~~~~~~~~~~~~
 
In a message dated 11/11/2014 7:02:50 A.M. Pacific Standard Time,  
virtualvairs-request at corvair.org writes:

Message:  4
Date: Tue, 11 Nov 2014 07:01:12 -0500
From: "Mike Clark"  <mclark67 at charter.net>
To:  <virtualvairs at corvair.org>
Subject: <VV> EZ Lift
Message-ID:  <EF270AB3CCF24069874A91256469D9BF at MikePC>
Content-Type: text/plain;  format=flowed; charset="iso-8859-1";
reply-type=original

Hi everyone.

Wondered if anyone ever used EZ  Lift.  I looked at their website and the 
pictures and videos had several  Corvairs as demonstration vehicles.  Looks 
like a nice product, but I had  a couple questions, such as that locks it in 
place once it's up?

If  anyone has one or used one, I'd love to hear your thoughts on  it.


Mike Clark
Stockbridge,  Georgia