sharpening a serrated knife in 90 seconds - knife sharpening

[stavvvvy]

Nice video i havent seen one of those old school knife sharpeners in about twenty years.

[VivaPermies]

I would think that he is de-burring the edge ... also cooling off the blade since the friction probably makes it warm.

[bluelair]

He is not really sharpening the serrated edge, if he keeps doing it like this, the serrations will be gone and it will become a plain edge, albeit much sharper.

To sharpen a serrated edge, you have to use a narrower wheel or the corner of the one like he has and hit each concave serration separately so you maintain the "points" between them.

Buy a $30 grinder and the "Paper Wheel Sharpening system", it's all you will ever need.

[paulwheaton12]

anybody know what he is doing running the blade on the wood every ten seconds or so?

[KoN312]

@paulwheaton12

testing the cutting properties i think.

[bluelair]

@paulwheaton12: Drawing the edge through some wood like you were trying to cut the wood in half takes off any remaining fragments of the wire edge, since it is so weak. What is left is the new pristine edge.

[GreendogX7]

@paulwheaton12 he said something about the oak was clearing off the "weak" parts of the edge and leaving the "true" edge

[heyontv]

@paulwheaton12 porbly checking sharpness

[vutEwa]

@paulwheaton12 would adding cellulose (wood) to the mix provide an extra boost of cleaning power as it steams off the blade?

[MATTNATTMATT]

@paulwheaton12 Getting rid of the small bit of metal left behind?

[CarniTHC]

@paulwheaton12 getting rid of spurrs in the metal..

[fetymann]

@paulwheaton12 It looks like he cuts a bit edge of the wood briefly to test how sharp it is. Pause at 00:54 you can see other cut marks.

[AdUtrumquePeratus76]

@paulwheaton12 wire or feather is the small bit of steel that protrudes past the point where the planes of the edge meet. The buffer brings the"wire" up and off the blade, this feels sharp, but the wire or feather will bend over and the blade wont cut. running it over hard wood removes the wire and re buffing polishes the true cutting edge.

[CSVickers1984]

@paulwheaton12 He is honing the edge, (the grinding process has a tendency to heat up the metal and bend the edge of the blade over like the crest of a tidal wave,) so that it straightens out again. If he didn't do that, grinding the second face of the blade would nibble away the sharpest part and essentually dull the blade overall. It also has the function of sweeping away any fine grit from the surface, making for better contact between metal and grinding wheel.

[Glactoris]

@paulwheaton12 He's removing the burr

[888bobdaduck]

@paulwheaton12 testing sharpness i suppose...

[paulwheaton12]

anybody know what he means by "wire edge"?

[uintahbackpacker]

@paulwheaton12 The wire edge describes the phenomenon of an abrasive deforming the metal below the abrasion point, eventually leading to a "wire edge," an incredibly small area right at the blade that becomes flexible due to physics I don't understand. He's running the blade through the wood to remove the wire edge, therefore maintaining the integrity of the sharpened blade. Put these terms in Google and the first result should explain it:

"the wire edge" higgins

[uintahbackpacker]

@paulwheaton12 Also, if you search

"chad ward" knife care

via Google, you'll find another great resource (first search result).

[tribalwind]

@paulwheaton12

he's referring to the "burr" created by the grinding wheel. when you sharpen a blade it 'raises a burr' a tiny bit of metal bent over on the back side. he's running it through the wood to remove the burr,leaving a very sharp clean edge.

[allengoodman69]

@paulwheaton12 Stop the vid at 0:14 ,he is pointing to the wire or feather edge,see how "rough" it looks.... Basically if you look at the edge up close it would look like the name implies. By buffing and drawing it across the wood he is removing or refining the edge by removing this wire or burr as it is sometimes called. I have a video for woodcarvers called "2 Ways to Maintain Your Woodcarving Knife",I discuss this wire edge a little also if you would like to give it a look.

^ l l { l\l

[artimus5]

I think he's referring to the burr that builds up on the back of the blade as you sharpen. See the diagram marked "burr" . Youtube seems to block URL's in posts, but if you google "burr" with sharpening you'll find it quick enough.

[Sarstan]

@laidbackguy1972

It does make me uncomfortable to not have talents like this. Definitely one of many skills that any man should at least be familiar with.