Knives with cut slits or removed metal

B

bdcochran

Joined
Jan 2, 2012
Messages
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I have seen a number of fixed blade and folding knives with metal material cut from the blade, usually giving the appearance of a slit.

I confess a prejudicial supposition that the slits weaken the knife blades and may introduce stress points.

So my questions would be along lines of whether slits are truly functional, whether they weaken knife blades, and are they just marketing gimmicks. I would like to confirm or contradict my suppositions.
 
As long as the knife is used for its intended purpose - cutting with the edge - I don't think these stress points matter much. Hence, mostly such slits are aesthetics and marketing, IMO.
 
Are you referring to fullers or blood grooves? They can reduce weight and sometimes add some strength if done right similar to an I beam used in construction. But for the most part they just look cool.
 
Maybe if there was some jimping on those slits we could do something. Hmmm.
 
I always thought they were speed holes, used to make the knife faster when wielding at enemies.
 
They are Blood Grooves - so the blood keeps spraying all over you. I mean, to prevent Blade Suck.

E
 
OP what you're talking about is probably done for weight reduction.

Perhaps you could give us some brands/models that you are talking about so we could really see what you mean. That, or post some pics. Otherwise we'll all just be guessing or making stuff up.
 
A fuller/blood groove really has nothing to do with blood, but weight. And in a pocket knife has little effect, but is more decorative.

I also maintain that a fuller does not make a blade stronger, but they do allow to reduce weight in a way that little to no structural integrity is lost.
 
He never said it was a fuller he said slit could be jimping could be serrations could be fuller. Could really be a slit.
 
Fuller and weight reduction. Hm.
Ever measured before and after?
I did on a big blade and ground two fullers each one third deep into the quarter inch thick blade. Both fullers are 2cm x 10cm long Saved a total of 5% of 23 Oz. Not really much.
Reducing the angle of a ffg blade by a little bit would make a much bigger difference.
I think fullers are very good for shifting around the balancing point.
Somewhere I read they prevent blades from breaking under twisting forces.
And don't they look cool?
 
Charr said:
For Todd Begg, "slits" literally do cost extra...
Click to expand...

For todd begg EVERYTHING is extra. I dont even think my bodeaga came in a box. Sure glad it didnt as it would have been the only $50 box i own. And if that box had a lid? You dont even want to know.
 
LEGION 12 said:
He never said it was a fuller he said slit could be jimping could be serrations could be fuller. Could really be a slit.
Click to expand...
Who the fuller you callin' a slit?

Jens Schuetz said:
Fuller and weight reduction. Hm.
Ever measured before and after?
I did on a big blade and ground two fullers each one third deep into the quarter inch thick blade. Both fullers are 2cm x 10cm long Saved a total of 5% of 23 Oz. Not really much.
Reducing the angle of a ffg blade by a little bit would make a much bigger difference.
I think fullers are very good for shifting around the balancing point.
Somewhere I read they prevent blades from breaking under twisting forces.
And don't they look cool?
Click to expand...
Good point about the balance. Also, I do think they can look cool!
cc02c5f9bef7e0e9ead3153cbb8681cb.jpg
 
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