Does anybody know if this compressor...

 

http://www.diy-compressors.com/shop/direct-drive-compressors.htm#pp231

(The OL 231)

 

should be able to power this wrench...

 

http://www.justoffbase.co.uk/s.nl/sc.9/category.50/it.A/id.6694/.f

 

I've got both and it just doesn't work! :confused:

 

The wrench claims to consume 4cfm at 90psi. The compressor claims to supply 8cfm at 116psi.

In theory it should easily. Have you got the regulator turned down, or could the wrench be faulty ?

In theory it should easily. Have you got the regulator turned down, or could the wrench be faulty ?

Even when I turn the regulator up to the top, I can stop the wrench turning with my hand.

 

I've had the same problem in the past with a ratchet wrench which I put down to just buying a crap ratchet wrench.

 

I've not had this compressor long and I thought it would be good for everything I needed it for. I won't be happy if I've got to buy a bigger one already!

4 cfm is only a baby not suprised you can stop it by hand . ewhat size drive is it ?

I have a similar sized one and it'll drive my 1/2" impact wrench.

I have a similar sized one and it'll drive my 1/2" impact wrench.

4 cfm for a wrench is not a lot of consumtion thought for any good power would be around 10cfm consumption

Go and buy some spanners and a ratchet set ya bunch of pooooofs!!!! :D

The problem is that the two items you have aren't well matched. The air ratchet you have is a pro model usually used on compressors with bigger receivers (i.e. 250litres) and higher pressure ratings (10-13 BAR minimum). This is a ratchet that a lot of tyre bays use (I used to work in the garage equipment industry and have come across it before) and they use much bigger compressors to run them. An air ratchet of this specification would empty the receiver on your compressor faster than the pump unit could replenish it.

 

Although the ratchet states it will run on a relatively low CFM value, that is usually a duty cycle figure. A quote from a compressor company site...

 

Air tools are often rated as “Average CFM.” “Average CFM” is typically based on a 25% duty cycle (15 seconds out of a min.). If you plan on using an air tool on a continuous basis, it is a good idea to multiply the “Average CFM” x 4 to get a continuous CFM rating for the tool.

 

The other problem is that compressor manufacturers normally quote maximum theoretical figures for CFM. Typically a compressor will only give 50-70% of that figure for a variety of reasons. Its just running out of puff.

 

I hope this info is of some use...

 

I hope this info is of some use...

 

:bow: Slightly more helpful than my post :D

I am a mind of useless information...or so my missus keeps telling me!

 

Just don't ask me anything technical about these fookin cars, had mine just over 2 weeks and every time I look at it I seem to find another problem!

4 cfm for a wrench is not a lot of consumtion thought for any good power would be around 10cfm consumption

 

Dunno what rating the wrench is, but it works OK. Compressor is about 8cfm - it's an old SIP model. I'm actually after something that provides about 14cfm, to run my grit blaster.