Here's My Theory

[Scrappile]

Okay, one thing I have found difficult about some flat scroll saw blades is determining which is the top of a blade.  Which way is up.  I do not have good enough feeling in my finger to run my finger along the blade to determine which it the right side.  Don't have good enough eyesight to look at them and really tell which way the teeth go, especially blades with reverse teeth.  But I think I have discovered something, maybe wrong, but so far it has worked.  The blades come wrapped, by the dozen, with a fine wire.  To unwrap them you find the loose end of the wire and untwist it from around them.  I have been checking and it appears that loose end of the wire is always at the bottom of the blades.  So, I unwrap them and put them in the tube I store them in with the end that the wire was loose at first.  So when I take them out of the tube the top end of the blade is at the top of the tube.....

 

Check it out and see if I am right. 

[dgman]

I've tried that before, but found it isn't always the same. FD Ultra Reverse blades have a small indent to mark the top, but all other blades don't.

Try using your thumb nail to feel the teeth direction. It's worked for me for twenty years!

[Scrappile]

darn, thought I was onto something..

[amazingkevin]

Okay, one thing I have found difficult about some flat scroll saw blades is determining which is the top of a blade.  Which way is up.  I do not have good enough feeling in my finger to run my finger along the blade to determine which it the right side.  Don't have good enough eyesight to look at them and really tell which way the teeth go, especially blades with reverse teeth.  But I think I have discovered something, maybe wrong, but so far it has worked.  The blades come wrapped, by the dozen, with a fine wire.  To unwrap them you find the loose end of the wire and untwist it from around them.  I have been checking and it appears that loose end of the wire is always at the bottom of the blades.  So, I unwrap them and put them in the tube I store them in with the end that the wire was loose at first.  So when I take them out of the tube the top end of the blade is at the top of the tube.....

 

Check it out and see if I am right. 

Don't keep all your eggs in one basket,somethings always not the same,lol

[Montserrat]

if you have reverse teeth blades, there is a small gap before the start - which makes it easy to figure out the bottom.  Magnifying glass to help finding it?

[Lucky2]

If I can't tell by eyeing the blade, I drag the blade over my thumb nail to find the direction of the cut.

Len

[kywoodmaster]

I am with Len and Dan. I use the thumb nail trick too.

[ike]

I have a lighted magnifying glass on  my saw and It helps with everything. esoecuakky with 76 year old eves.

[NC Scroller]

From my experience every blade in a bundle or bag are in the same direction.  So once you determine what way one blade is the other 11 are the same way.  Then you can mark them with a red magic marker or nail polish.