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Unread 02-18-2011, 11:38 AM   #1
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Default Manual Mechanical Car Jack

Hello!

I'm an engineering student and am trying to collect some opinions on manual car jacks for a project - most likely a manual scissor jack (non-hydraulic). Any input, experiences, comments or opinions would be greatly appreciated!

Do you have a compact lead screw car jack that you like? Dislike?

What are some of the aspects you like about car jacks you've worked with?

What are some of the aspects you dislike, find cumbersome or annoying with car jacks you've worked with?

What features do you value the most in a car jack? Speed? Safety? Weight?

Again, I would really appreciate any input.
Thanks.

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Unread 02-18-2011, 01:54 PM   #2
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I wouldn't consider a lead screw jack suitable for for general auto repairs. They are too slow up, and waaaaay too slow down.

The only things going for them are low cost and they down "leak" and lower themselves.
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Unread 02-18-2011, 02:33 PM   #3
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I like my scissor jack that came with my 1989 Ford Thunderbird. It is relatively compact and lightweight, but easy to use. It has a bar that comes out the side and slides back and forth in the part that turns to raise the jack. Going up is fairly quick, and going down is fairly quicker. I have used it multiple times (not as a replacement for jackstands) and was surprised at the ease of use and its effectiveness. I dont really know what else to say as I havent given the subject much thought.

Good luck with your project, if you have any more questions I would be happy to answer them.
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Unread 02-18-2011, 03:49 PM   #4
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I always use hydraulic jacks at home, but if I had to I would use a manual jack on the side of the road. Simply because it takes up such little room and is light.

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Unread 02-18-2011, 09:23 PM   #5
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The heavier the object, the harder it is to turn, obvious one i guess. Ive used one many of time, and overall it very versatile, and much easier to carry in the car, than a big hydraulic jack. Just hate how slow it its to use...
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Unread 02-18-2011, 11:34 PM   #6
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Thats what i use at home..


But i'd prefer this...
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Unread 02-19-2011, 01:18 AM   #7
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This is what I have at home,

I got the hoist for free and it cost me $1300 to repair it and install it.
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Unread 02-19-2011, 01:46 AM   #8
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Quote:
Originally Posted by Mr Car Guy View Post
This is what I have at home,

I got the hoist for free and it cost me $1300 to repair it and install it.
Wow I am jealous.

But I myself use a hydraulic jack, which I'd much prefer over the mechanical one as anyone else, but again its too slow to use despite its other benefits. It would be pretty cool to have a jack that I can slide under the car and it raises all four wheels off the ground. Not so much a lift because it would work the same way as a jack but with a bigger/stronger lever, and it would jack up the whole car rather than lift it at one point.

Or it would be cool to have actuated jacks come out of the ground and raise my car from where it is (garage floor perhaps). Nothing beats a lift though.
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Unread 02-19-2011, 09:35 AM   #9
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Wow, thanks a lot for the responses!

One of the constraints of the project is that I have to use a lead screw design so hydraulic is out, though that hoist system is very impressive .

The main use would be for a compact car (probably just quick, on the side of the road fixes), but it would be really cool to come up with a jack system for lifting the entire car...

Do you guys ever have problems keeping the jack base level when using (if you're not on level ground)? And do you notice any creation of dents from the base if you've used it on a softer surface?

Also, have you ever had any problems with the interface of a jack and the jack point on your cars?

Again, thank you so much!

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Unread 02-19-2011, 01:02 PM   #10
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Well typically I jack my car on a slanted surface (my driveway) and I never have issues as long as I have the parking brake on. However at some point in time, one of the wheels of the jack got a little bent from probably being misused.
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