Edge Pro Apex; How to Not Grind the Thumb Stud?

Lenny

Lenny

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Oct 15, 1998
Messages
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So, every thumb stud knife I've ever sharpened on the Edge Pro has had the thumb stud ground away a tiny bit.
It happens, obviously, when I'm sharpening at the heel end.
I just took off a tiny bit of my Sebenza thumb stud.
(BTW, the edge is beyond sharp now!!)
It's a tiny amount and has no effect on function, but there must be a way to keep it from happening.
What am I doing wrong?
Thanks all.
 
When you are sharpen this knife.... are you going over the thumb stud with the stone? I mean, is the stone on top of the thumb stud or you are touching the thumb stud from the side with the stone?

Its best if we see a photo to be sure what's the problem.
 
Going over the top, that's the problem.
And the thumb stud is pressed in, no way to remove it.
 
Use tape on everything the stone might scratch. Angle the stone in relation to positioning the knife in the clamp. To where the stone misses the stud but still contacts the edge heel.

It might be hard to hear. But if you scratched the thumb stud. That's on you.
 
Lenny said:
Going over the top, that's the problem.
And the thumb stud is pressed in, no way to
Click to expand...
In that case you need to increase the sharpening angle (the stone won't touch it) or try to reposition the knife in clamps so the stone will go by the side of the thumb stud.
 
Lenny said:
So, every thumb stud knife I've ever sharpened on the Edge Pro has had the thumb stud ground away a tiny bit.
It happens, obviously, when I'm sharpening at the heel end.
I just took off a tiny bit of my Sebenza thumb stud.
(BTW, the edge is beyond sharp now!!)
It's a tiny amount and has no effect on function, but there must be a way to keep it from happening.
What am I doing wrong?
Thanks all.
Click to expand...

Screenshot_20231216-130602.png

Use the small knife attachment
 
Measuring the blade and thumbstud on my Sebenza 31 and plugging the numbers into https://www.carbidedepot.com/formulas-trigright.asp, I see that the narrowest possible angle for the stone to clear the thumbstud while the stone passes directly over the thumbstud is about 13 degrees per side. Assuming that the stone is flat, the only way to get around this limitation is to position the blade such that the stone literally goes around (or beside) the thumbstud instead of passing over the thumbstud
 
Another Shepherd said:
Measuring the blade and thumbstud on my Sebenza 31 and plugging the numbers into https://www.carbidedepot.com/formulas-trigright.asp, I see that the narrowest possible angle for the stone to clear the thumbstud while the stone passes directly over the thumbstud is about 13 degrees per side. Assuming that the stone is flat, the only way to get around this limitation is to position the blade such that the stone literally goes around (or beside) the thumbstud instead of passing over the thumbstud
Click to expand...
And you need to go LESS than 13 dps?
 
Yes, you'd need something more than 13 to clear the stud.
Sorry, I thought you were suggesting that you wanted to sharpen to an even lower angle than the 13 dps you calculated.
 
The question to how to not grind off the thumbstud when sharpening your knife? I would think the obvious answer would be to only buy Spyderco knives with opening holes or any other knife that used an opening hole of some sort. No thumb stud to get in the way!
 
DavidABQ said:
The question to how to not grind off the thumbstud when sharpening your knife? I would think the obvious answer would be to only buy Spyderco knives with opening holes or any other knife that used an opening hole of some sort. No thumb stud to get in the way!
Click to expand...
There you go thinking logically again!
 
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