electric car jack

[kanvelchoudhary]

i am trying to work out some possible combination gears to have a torque of around 10Nm from a 12 V dc motor rated as .4 Nm i want to use it for a scissor jack. anyone with some sort of idea.

 

[Brian Rupnow]

Kanvel---Thes are already commercially available. They come with a 12 volt motor.----Brian
http://www.generatordepot.us/browseproducts/Electric-Car-Jack-2-Ton.HTML

 

[Mainer]

To get 10Nm torque out of the 0.4Nm motor I think you need, in theory, a 25:1 gear reduction. Then you will need to allow for friction losses, say 10%, so you really need to calculate for 11Nm output. Then I'd build in a reserve safety factor of at least 2, so I'd calculate for 22Nm output, or a gear reduction of 55:1. That might be achievable in a rational-size package with a couple of planetary gear reductions.

But I wouldn't guarantee I know what I'm talking about. :

I would be inclined to see if a hefty battery-powered electric drill would have enough torque to work.

 

[Lew Hartswick]

Newton Metres. Are those something like Fig Newtons?
I'd have to look up the conversion to Foot Pounds.
...lew...

 

[Davo J]

This is a great converter of almost anything.
http://www.convert-me.com/en/convert/torque
Just select what you want converted in the drop down box at the top. It also allows you to choose not to see the ads.

Dave

 

[krv3000]

well dont no if this helps but i moded a car jack by welding a 14mm nut to the end and made up a shaft that held a 14mm socet in a 18v cordles drill