why is my ash magnetic?

B

berial999

Joined
Aug 20, 2008
Messages
8
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i just noticed today that my knife is magnetic, but here is the weird part i do not store it near anything magnetic and it has been sitting on my table for about a week now... sorry for the poor pic my camera sucks
 
a lot of blades come like that. at least half of mine are magnetic, usually strongest around the choil or tip
 
Probably didnt De-Magnetize them after they took them off the Grinder or Magnetic Sine Plate. That would be my guess.
 
silverdragon33 said:
a lot of blades come like that. at least half of mine are magnetic, usually strongest around the choil or tip
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Slightly technical but your knife may seem the most "magnetic" around the choil or the tip because magnetic fields tend to concentrate and be strongest at sharp points. So, what you're experiencing makes complete and total sense. Just thought I'd throw that in...
 
G'day guys, interesting stuff.

Magnetic chuck used while machining the knife???

My user FFBM was handy so i checked the blade and sure enough... number 3 hex key sticks there no probs.

Good or bad id like hear a little more about it.

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Travis.
 
I find magnetic blades a pain to grind because the grindings stick to the edge.
 
foxyrick said:
I find magnetic blades a pain to grind because the grindings stick to the edge.
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I've definitely noticed this when sharpening some of my Busse family blades - very odd to have this long tendril of black dust sticking to the edge.

It never really clicked in my head that magnetism was what was making the dust hang around. I guess I just wiped it off and never gave it a second thought.
 
when ever I sharpen on sand paper, it get the filings attached to the edge. I have not checked any of my knives for actual magnetism. I figured it was just static from dragging it across sand paper on a mouse pad.
 
//lurk off

Non destructive testing method ??

Magnetic Particle Testing:

The Magnetic Particle Inspection method of Non-Destructive testing is a method for locating surface and sub-surface discontinuities in ferromagnetic material. It depends for its operation on the face that when the material or part under test is magnetized, discontinuities that lie in a direction generally transverse to the direction of the magnetic field, will cause a leakage field, and therefore, the presence of the discontinuity, is detected by use of finely divided ferromagnetic particles applied over the surface, some of these particles being gathered and held by the leakage field, this magnetically held collection of particles forms an outline of the discontinuity and indicates its location, size, shape and extent.

A couple of threads mentioned infi was magnetic from fault testing so I guess the above is the reason. I could be completly wrong though!

//lurk on
 
Most of the Busse knives I pimp are magnetic, I think they are ground using a magnetic chuck, I had to buy a demagnetiser to sort them out.
Richard
 
Interesting stuff. got me to thinking so I got the SHBM and gave it a try, couldn't get anything to hang on not even a staple. My Mistress is about 10 years old, were things different then? Was gonna post pic but don't know how
 
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