SAE torque settings (again)...

**Corvette91** · 04-19-2006, 05:08 PM

This page

http://raskcycle.com/techtip/webdoc14.html

shows the SAE torque specs. But in case of the SN-blowers the bolt will screw into aluminium so how do I read the table then? The allen head bolt is of the strongest grade but the aluminiun is very soft so how do I determine the torque?

The settings in this link/image

http://smg.photobucket.com/albums/v1...build/expl.jpg

does not appear to be consistent with the first link. Can someone explain, I'm a little confused. One more thing, are the torque settings for wet or dry?

Rob

**F=MA** · 04-19-2006, 07:14 PM

Just because a bolt is rated for a certain torque strength doesn't mean it has to be set there. Follow the specs in the second link and don't overthink the problem.

F=MA

**Corvette91** · 04-20-2006, 08:20 AM

Originally Posted by F=MA

Follow the specs in the second link and don't overthink the problem.

Sounds like a good idea! I've been told on several occations that I tend to "overthink" problems :)

Although I'm wearing glases I can't read some of the data. Perhaps someone knows if there is a higher resolution version of this image by Pavement pounde?

Thanks Rob

**pavement pounde** · 04-20-2006, 03:59 PM

Remember that the house is aluminum so don't over torque things

**pavement pounde** · 04-20-2006, 04:01 PM

Originally Posted by Corvette91

Although I'm wearing glases I can't read some of the data. Perhaps someone knows if there is a higher resolution version of this image by Pavement pounde?

Thanks Rob

I see what you mean, I have the original and try to scan it with better scanner then my $10 scanner:emb
If you can wait till tommorow ?

**Corvette91** · 04-21-2006, 02:08 AM

Originally Posted by pavement pounde

I see what you mean, I have the original and try to scan it with better scanner then my $10 scanner:emb
If you can wait till tommorow ?

Great :) There is no hurry so Tomorrow will be fine!

Thanks for the help,
Rob

**Corvette91** · 04-21-2006, 02:23 AM

Originally Posted by pavement pounde

Remember that the house is aluminum so don't over torque things

I did a small math error in converting in lbs to Nm (I live i Sweden) so instead of setting the imput shaft bolts to 50 in lbs (dry?) I set them to 46 (wet). So at the moment they are a little loose and now I'm wondering if I need to remove the shaft once more to re-tightening it.

Rob

**pavement pounde** · 04-21-2006, 01:16 PM

Here you go:

http://community.webshots.com/photo/89255135/2843869970049354209xjlMyk##

Klick on the picture for a larger shot.

**pavement pounde** · 04-21-2006, 01:20 PM

Originally Posted by Corvette91

I did a small math error in converting in lbs to Nm (I live i Sweden) so instead of setting the imput shaft bolts to 50 in lbs (dry?) I set them to 46 (wet). So at the moment they are a little loose and now I'm wondering if I need to remove the shaft once more to re-tightening it.

Rob

Ah, you are a fellow European

I think 46 inch/pound would be ok I guess.
What exactly do you mean with wet ?

**Corvette91** · 04-24-2006, 01:09 AM

Originally Posted by pavement pounde

Ah, you are a fellow European

Yes, I live in Sweden. I've been to Netherlands once (1975) :)

Originally Posted by pavement pounde

What exactly do you mean with wet ?

Sometimes torque specs are given for oiled (wet) threads and sometimes for clean dry threads. It will differ about 20%. Quite often, the author don't specify this. I read some where that torque settings is not an exact science so it probably don't matter much.

Rob