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Thickness Behind the Edge
- Thread starter calc
- Start date
The width of the edge shoulders is affected by the angle of the edge, so it would help to include that measurement. As you make the edge more acute, the width of the edge shoulders will grow on most knives. My experience with factory edges is that they come in a lot of different angles, usually not evenly ground.
So, for example, You might get a 15 dps factory edge on one knife and measure 0.027 inches behind the edge. While another model with a 20/22 dps edge angle will measure 0.020 behind the edge. If you measure only the width of the edge shoulders, you'll be misled into thinking the second knife is a better slicer.
So, for example, You might get a 15 dps factory edge on one knife and measure 0.027 inches behind the edge. While another model with a 20/22 dps edge angle will measure 0.020 behind the edge. If you measure only the width of the edge shoulders, you'll be misled into thinking the second knife is a better slicer.
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What exactly is this "thickness behind the edge" you guys are referring to? 
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This is a good point, but we'll have to be careful not to get into a chicken-or-the-egg situation, since they are two sides of the same coin.
Sprint runs can and definitely should be included!
What exactly is this "thickness behind the edge" you guys are referring to?
I love the profile of the Stretch, I've been meaning to pick another up for a while now.
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I'm interested in how much variation there is within models. I picked up a second southard recently, and it is extremely thin behind the edge - much more so than the first one I have (but I don't have calipers to measure). Has anyone else had examples of the same model with significant differences in the grind thickness?
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I don't currently have doubles of anything, but I've seen some variation in the past based on how high up the edge is ground. If it's ground a little longer, it goes a little higher into the profile and into thicker steel.
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Here is two Caly 3's. Both were reprofiled to about 13 dps on the EP, but just compare the width of the bevels. The SB was more than twice as thick behind the edge as the ZDP.
I thinned out and zero convexed the SB a while ago.
Same thing with these two:
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Very interesting thread for comparison.
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I don't have the appropriate tools to measure it myself, but does anyone know the thickness behind the edge on the Domino?
I just got a Domino (BBS version) and I swear it's one of the thinnest ground Spydercos I've ever had. I like it.
Now I'm thinking about asking Big Chris to hook my Manix 2 up with a similar grind, but I'd like to know the exact specs so I can provide to him.
Can anyone give me some blade thickness measurements on the Domino?
Are the specs the same on the regular production Domino as they are on the BBS exclusive version? (I'm guessing they would be, but you never know...)
I just got a Domino (BBS version) and I swear it's one of the thinnest ground Spydercos I've ever had. I like it.
Now I'm thinking about asking Big Chris to hook my Manix 2 up with a similar grind, but I'd like to know the exact specs so I can provide to him.
Can anyone give me some blade thickness measurements on the Domino?
Are the specs the same on the regular production Domino as they are on the BBS exclusive version? (I'm guessing they would be, but you never know...)
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Regular production here:
http://www.bladeforums.com/forums/s...kness-Behind-the-Edge?p=13921277#post13921277
Can't comment on the sprint run, but I doubt they're very different (if at all). Very thin behind the edge, much more so than I thought it'd be.
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Whoops, can't believe I missed it
Thanks calc
No problem, if you know someone with a set of calipers or end up getting your hands on one, feel free to add to this thread. There are a couple other common models I'd like to get listed.
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What exactly is this "thickness behind the edge" you guys are referring to?
Just got a Super Blue Stretch myself and thought of this thread. I'll be adding it to the thread shortly.
I've been really impressed with it. Haven't sharpened it yet but I'm looking forward to it, I've heard good things about Super Blue.
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Stretch
Base: 0.023"
Middle: 0.023"
Tip: 0.025"
Seems odd to me that this would be so uniform throughout, given the belly and tip. Might just be a nice distal taper, but we'll see. I'll verify tomorrow when I have clearer eyes. Regardless, this has been my EDC the past week and might be for a while. Cuts very nicely.
Base: 0.023"
Middle: 0.023"
Tip: 0.025"
Seems odd to me that this would be so uniform throughout, given the belly and tip. Might just be a nice distal taper, but we'll see. I'll verify tomorrow when I have clearer eyes. Regardless, this has been my EDC the past week and might be for a while. Cuts very nicely.
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Stretch
Base: 0.023"
Middle: 0.023"
Tip: 0.025"
Seems odd to me that this would be uniform throughout the belly and tip. Might just be a nice distal taper, but we'll see. I'll verify tomorrow when I have clearer eyes. Regardless, this has been my EDC the past week and might be for a while. Cuts very nicely.
Thicker than Stretch ZDP... similar to Brock O Lee's Calys in the same two steels.
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I was wary of being so close to the edge with my calipers while my eyes were so worn out after a long day. So we'll see once I verify. But I definitely didn't see any measurements close to .018".
Very interesting thread Calc 
One primary blade style I see a lot with more than average thickness close to the cutting edge are many of the full flat grind models that Spyderco blesses us with. It's not a problem with me at all because I just simply grind in the proper relief or in an extreme case and I've had a couple over the years I just go ahead and reprofile it completely.
Also I've found that many of the plain edged Spyderco Hawkbills have more than average thickness close to the cutting edge as well and they can be quite a chore to get them right again. I've only had one Recurve and maybe one Reverse S style blade with too much shoulder but thankfully they are kind of rare.
This is an interesting subject and one I haven't heard talked much about.
One primary blade style I see a lot with more than average thickness close to the cutting edge are many of the full flat grind models that Spyderco blesses us with. It's not a problem with me at all because I just simply grind in the proper relief or in an extreme case and I've had a couple over the years I just go ahead and reprofile it completely. Also I've found that many of the plain edged Spyderco Hawkbills have more than average thickness close to the cutting edge as well and they can be quite a chore to get them right again. I've only had one Recurve and maybe one Reverse S style blade with too much shoulder but thankfully they are kind of rare.
This is an interesting subject and one I haven't heard talked much about.
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Very interesting thread Calc
Also I've found that many of the plain edged Spyderco Hawkbills have more than average thickness close to the cutting edge as well and they can be quite a chore to get them right again. I've only had one Recurve and maybe one Reverse S style blade with too much shoulder but thankfully they are kind of rare.
This is an interesting subject and one I haven't heard talked much about.
Thanks! I felt the same way too when I was searching for information on certain models, so I appreciate any input anybody has. Yours is much appreciated.