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First off this blade was an ebay purchase.....I have a 4k/8k set up w/ no 1k. The edge seems to lay flat the whole way across on one side, the other side doesn't (lays down at the heel lifts toward the toe?). The heel is sharp to about the middle of the edge, then becomes very dull. Idea's on how to go about correcting this?
warped blade.Quote:
Originally Posted by Trimmy72
Use circular motion hone it and make the all edge sharp.
There is no way to correct it permanently.
(if small warping you may hone it out-spine enough to fix the problem)
Start out with some black marker and paint the very edge of the blade. Do a couple of strokes in your usual method and see if the marker is uniformly removed. If not you will have to adapt your stroke to include all of the edge. Sometimes heel leading at a 45 degree angle can do it other times you might need a rolling x if the blade is out of whack. Go to the Wiki honing section and check out the rolling x. :gl:
+1 to the responses already posted. It's tough to hone a blade that has been honed by someone else. There strokes are not the same as yours. If you follow the steps already laid out you will be able to get the edge back. :gl:
that's less likely a warped blade and more likely that you didn't lap your new sharpening stone. Stop sharpening and get some 220 grit wet/dry sandpaper. if your blade still doesn't sit flat after 10 minutes of lapping your new stone, then consider other alternatives
I'm missing something here....Quote:
Originally Posted by daflorc
If there aren't any irregularities in the blade how does the flatness of the stone affect the way the blade sits on the stone (relative to a one side vs the other comparison). Isn't it concave or convex the same amount whether the face or the back of the blade is resting on it?
To be clear, I'm 100% in favor of lapping a new, old, or in-between stone. I just don't see how it applies to this situation.
+1 To this, but I suggest using a BLUE or RED marker. Blue wavelength light travel's faster and is registered more easily by the human eye. Red's not bad either. Black is harder to see unless you have a nice BRIGHT background, and then is the black you see the shadow of the underside of the blade, or marker line? Blue sharpies work well.Quote:
Originally Posted by JimmyHAD
Quote:
Originally Posted by daflorc
Right and right, BUT no matter how consistent your strokes, you physically cannot hone the back side of the blade exactly the same as the front side...it's physically impossible. As a result, a curl at one end of the stone, or a slight warp could either one give the impression of what you're experiencing.Quote:
Originally Posted by Bill S
Now, honing RAZORS I'm no expert, but I'd suggest using the marker trick to figure out where/how the blade is contacting the stone, AND lapping your stone just to be double sure it's perfect.
Bill: assuming they're aren't any irregularities in the blade, if you have a lumpy stone, the high points in the stone will take off more material faster and neglect the lower areas, leaving you with a razor with an uneven bevel.Quote:
Originally Posted by Bill S
You'll be able to hear it in a pass...it'll be a smooth, grinding sound....then in one part of the stone it'll show more resistance and you'll hear a louder, nastier noise... uneven pressure between heel and toe will give uneven bevel wear as well.
If the blade is warped, it won't lay flat on either side IMOQuote:
Originally Posted by Trimmy72
Making me think the stone is not flat and needs lapping
Also, I encountered a situation which sounds identical to this one, and the mistake I made was I didn't lap my norton before starting to hone on it. After a few minutes, I had the same problem Trimmy had, and realized it needed a lapping.
but, we may all be confused as to what the actual question is:
1. A razor has 2 faces, like the cheeks on your face: Left and right, and your nose is the edge. Sides of your nose are the bevel (like my analogy?:D
On one cheek of the razor, is the bevel uneven? OR, is the bevel wider on one cheek, and narrower on the other cheek/face?
If the bevel is uneven on one side/cheek/face of the razor, we're looking at warping or stone needing a lapping.
If we're talking about different sized bevels on each cheek, that's a good question that I hope someone who knows the answer can tell us :)
Or a warped blade or a blade with a spine thickness that's not uniform, or a blade with metal that's not of uniform thickness at the edge...Quote:
Originally Posted by daflorc
Especially if the OP is doing x-strokes it's unlikely that the hones being flat or not is the culprit here. You have mentioned in several posts that you bought wide hones so as to not have to do x-strokes. In that case an unlapped hone can cause problems like this. The x-stroke greatly reduces that possibility.
I've never had a lumpy stone. My Norton 4K had a lot of porosity, but my hones (even when new) only showed a very slight curvature across the surface.Quote:
Originally Posted by daflorc
In the interest of keeping this thread on track I have to say that I'm with Jimmy and Sham on this on this one.
Not true :) Speed of light in vacuum is the same across all frequencies/wavelengths, and not in vacuum the dispersion can be either way depending on the specific material :pQuote:
Originally Posted by BigJim
But of course, apart from my nitpicking, color contrast can be much better depending on the particular lighting situation, so it's great advice.
:banghead: Well that's what I get... Just kidding. I'm no physicist or anything, but as you pointed out, the contrast helps...I just wouldn't use black.Quote:
Originally Posted by gugi
Neon green might be good, unless you live in a 70's retro shag apartment, then you'll want to do something different. :P
+1 to HSNB I have a blade that looks flat on the edge but when the spine is on a flat surface the blade edge kicks up in the toe, so I had to either breadknife it or tape the spine till the edge is flat on both sides.
I've gotta turn off those cameras that broadcast me all across the internet :)Quote:
Originally Posted by BigJim
Or may be redecorate in glam rock:D
I think that your spine is flat/even on one side but not the other. Wider in the middle on the side that is giving you issues. Your hand is pushing down on the heel end and rocking it that way lifting the toe. An X stroke should help that issue since it is wider in the middle.
I just had a related issue with one that is narrower in the middle of the spine on one side. One bevel looked perfect. ( At least to me!:)) The other was wider in the middle of the bevel. Now if the edge was warped it would show up on the other side as well but it didn't. I measured the spine thickness with a caliper and found the narrow part of the spine corresponded with the wide spot in the bevel. Leading just by a little bit. I think that the x stroke in that instance contributed to the problem. As the narow spot in the spine approached the edge of the hone it changed the angle of the bevel. If I would have just laid the blade flat on the stone the spine would have rode on the high spots at each end and kept an even angle accross the whole bevel. It sharpened up good so I am going to leave it alone for now but it doesn't look right on that side.
Tim
Bevel is wider on one side the other side looks perfect to me very narrow the whole length of the blade. Hone wear is uneven on the spine, middle on one side and the other is toward the toe. I don't have a stone to lapp my hones. What are my options until I can purchase a lapping stone? Sandpaper, scotchbright?
This sounds like the exact problem I'm having. I think I'll try a marker on the edge, to see where I'm messing up.
You can use 325 grit sandpaper to lap your hones. Flat surface and plenty of water to wash away swarf. See this illustrated tutorial by Josh Earl here.
It is not at all unusual for a razor to have a wider bevel on one side or the other, one end or the other. These things aren't always perfectly symmetrical. This is why x and rolling x strokes come into play. If you can get a good shaving edge on it evenly symmetrical bevels, while desirable aesthetically, don't matter.