Showing posts with label sharpen. Show all posts
Showing posts with label sharpen. Show all posts

Sunday, January 3, 2016

Stay Sharp in 2016

New Year’s Day calls for a roasting pan full of pork, smoked sausage and sauerkraut at my mother-in-law’s house. The food preparation is relatively simple, but conflicts do arise. 

I am convinced that my martial arts instructor got it wrong.  He once told us the Chinese ideogram for trouble was two women under the same roof.  He’s wrong.  It’s an elderly mother and her daughter under the same roof.

Despite that, everything went fine except for the knives.  I have never seen two kitchen knives so dull.  Fortunately, I had my Spyderco Sharpmaker available.  Even more fortunately, I own a pair of coarse diamond sharpening rods.

Diamond sharpening rods and santoku  knife
The silver diamond rod and a dull santoku

Spyderco has made diamond rods for a number of years, but the cost for diamond-impregnated rods was above and beyond affordable.  Recently breakthroughs have brought the cost down so mere mortals like myself can afford them.  A retail cost of $80 for two rods isn’t terrible.  They also make a cubic boron nitride for the same price.  

The key, Spyderco’s Joyce Laituri told me, is not to bear down hard, but to let the diamonds do the work.  It only took a few swipes on each side to get the knife which wouldn’t tear paper to one that cut paper.

I've worked through the medium and ended with the white fine stone.  Spyderco makes an extra fine, but I suspect I really don't need it.
From there it’s working through the dark medium stones and the white fine stones.  I would suggest not always starting the sharpening stroke at the back of the edge or choil, but also at the knife tip.  I find that gets a better edge faster.

Years ago I was told about another knifemaker who used his Spyderco Sharpmaker backwards.  He started down at the bottom of the V formed by the two stones and brought his knife upward as well as towards himself.  

This makes sense.  You want to draw the wire edge, where the real sharpness is, outward from the blade.  When you strop an edge on leather or the cardboard backing of a paper pad, that’s what you are doing.

You can do the same thing with a fine stone too!

That edge doesn't have a micro-serration.  It's just badly damaged.  (It's a crappy photo, hard to hold the knife at the right angle and camera.)

The little santoku knife was dull, but the little Spyderco paring knife was beyond dull.  Holding the knife upside down and staring where the edge should have been was unusual.  I’ve never seen an edge that looks like tiny polished diamonds before.  Fortunately, the diamond rods took the chips and gouges out right away and let me work to the fine stones without too much trouble.

You see the side of the blade, but the not the edge.  It isn't because I've sharpened to a sub-atomic edge, but because its sharpen enough to come to an edge smaller than the resolution of the eye. 

I’ve always enjoyed sharpening knives.  There is a rhythm that seems to resonate with me.  It’s peaceful, calming work.  I stand or sit and under my finger pressure steel turns into an edge, one of man’s oldest and most important tools.  There is a connection between me and first person who wondered if they could make a favorite tool work again.  I like that.

Have a Happy and Sharp New Year in 2016!



Spyderco 204D a pair of diamond rods or 204CBN a pair of cubic boron nitride rods:  $58 plus shipping  Contact me.  Searcher12@gmail.com

Tuesday, January 10, 2012

New Edges and Observations

Speaking of sharpening….

I picked up an Eze-Lap diamond hone for work.  I use a rubber mill knife to cut rubber hoses and belts at work.  Many of these products have Kevlar fabric which can be cut but ruins the knife edge.  My co-worker has been using a cheap ceramic pocket sharpener in which he has ground a flat spot.  The diamond hone works better, but I noticed a “thunk” at the end of the sharpening stroke.  Of course, when you work with microscopes it’s easy to take a look. 
 
I found a small bump at the edge of the hone.  I don’t think it will affect the sharpening, but it gives me the shivers every time I make a stroke.

Eze-Lap coarse with bump at the edge

A new Spyderco has arrived.  It’s the Balance.  The closed knife resembles an equal arm balance, the favorite of classical analytical chemists.  That’s not me, but still it speaks to me.   
Spyderco Balance


Open, it’s a mini- gurkha knife or khukuri.  The knife is less than 3 inches closed and weighs 1.4 ozs.  That’s less than two first class pieces of mail!

 
The handle is carbon fiber and the steel VG-10.  The small clip can be moved to any of the four positions: tip up, tip down and right or left.  

If you look at it and ask what’s it’s for, well sorry, but you’re not a knife person.  Sometimes they are just for the heck of it.  Other times you have a specific need that a knife fills in a specific way.

I had a knife on sale on eBay, a byrd Meadowlark from Santa Fe Stoneworks in spiny oyster.  
byrd knife with Santa Fe Stoneworks spiny oyster grip
 
Somebody got a very good deal, but that’s beside the point.  It didn’t want to sell here so it sold somewhere else.  The thing is, the winning bid came in the last 12 seconds.  Was it sniping software, fast reflexes, or just good timing to get the bid in so late that nobody could counter bid?  

As a seller or buyer, I’m not sure I approve of sniping software.  But if you really want something, bid your maximum in the last 15 minutes.  eBay will auto bid to your max against incoming bids.  You’ll either get it or not at some price including your maximum.  But you will not fall victim to a sniper while trying to get a deal.