Air ratchets

[jsf55]

Use a winch motor either 12v or 240v ?

 

[striker]

I do t really want to mess about too much making mounts etc. The lift is heavy enough without adding mounts, motors etc. Would prefer ratchet or drill.

 

[Turbo]

What about one of the old Wolf gutbuster drills? Something like this.
https://www.ebay.co.uk/itm/Vintage-...085199?hash=item4b81ca97cf:g:iO4AAOSwdJlfZMqS

They are well geared down & have enough torque to physically spin a grown man around if they catch, so use with caution!
https://www.mig-welding.co.uk/forum/threads/cheap-gut-buster-and-stand-on-ebay.73360/
https://www.mig-welding.co.uk/forum/threads/wolf-general-duty-drill.81831/

This is my drill.
https://www.mig-welding.co.uk/forum/threads/i-can-forsee-a-trip-to-a-e.62076/

Still haven't plucked up the courage to use it!

 

[striker]

Hmmm, the wolf drill seems dangerous! Many tales of electrocution and broken wrists!!!

 

[daleyd]

It isn't hard at all because electric motors nearly always have more torque than air motors, thay also ghenerally have more start up torque.

As an example I’ve got a cheap JCB main powered drill. It’s a 2 speed with a mechanical gearbox - in speed 2 it’s not actually all that difficult to stall the drill from a standstill if you put enough pressure on it with a hole saw or similar in. Once you get it wound up then it’s a different matter but the start up torque is actually quite poor.

Now with low speed selected it’s a different matter as it will try and break your wrist if it snatches.

My 1/2 air ratchet rotates at a slow speed anyway and whatever torque it produces is available at all speeds. So I’d say that the 2 are not comparable, really.

Back to the OP - can you try and measure how much torque is needed? Get a torque wrench and go up in increments until you can turn it without clicking? 90nm is the recommended tightening torque for an m10/m12 size bolt and seems quite high for a sustained torque to turn??

 

[striker]

I can try that next time I lift the car, I have a torque wrench. The instructions say, mains power drill 1050w or over, torque required, 90nm.

 

[striker]

Maybe a 2 speed drill would be better than the variable speed I've burnt out.

 

[daleyd]

Maybe a 2 speed drill would be better than the variable speed I've burnt out.

I’d say one with a gearbox would certainly be a better option than running a single speed one.

 

[Chris Snow]

My DeWalt drill would do it. Has a metal gearbox. Max torque will be in the 450rpm range
DCD996
• Power output: 820W
• Beats per minute: 0-8600/25500/38250bpm
• No load speed 0-450/1300/2000rpm
• Max torque: 95Nm

Find something with enough torque and then more power is just more speed speed.

 

[striker]

That's cordless isn't it? The instructions state mains only.

 

[Chris Snow]

That's cordless isn't it? The instructions state mains only.

It's not going to make any difference if it's battery mains or petrol

A brushless motor will have more protection circuits built in. No idea how much battery life you would get but probably plenty

 

[Chris Snow]

Other thoughts, SDS with a chuck? tend to be low speed and reasonable torque for core drilling.

 

[striker]

It's not going to make any difference if it's battery mains or petrol

A brushless motor will have more protection circuits built in. No idea how much battery life you would get but probably plenty

I just assumed battery wouldn't have enough power/torque.

 

[daleyd]

I’d give the power figure they quoted an ignoring to as it’s not relevant - and concentrate on the torque figure they give.
As Chris said if something has got enough torque it doesn’t really matter what it’s powered by, though a battery drill with that much torque is going to probably cost a bit more than a mains drill if you don’t already have batteries/charger.

Really the only way I can see you getting something capable of running that level of sustained torque (how long do you need to keep turning for at that level of torque to turn the car over?) is with something that’s low geared to give it the oomph required.

 

[striker]

It takes less than a minute to get to full height