For those of you just getting your BK4-

T

tobiism

Joined
Jun 28, 2013
Messages
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Put a convex edge on it, and watch out! It's a great knife to begin with but when you convex it the chopping ability increases quite a bit!
 
I completely agree.
It changes the performance for the better.
Kinda like trading in a 4-banger for a suped-up V-8.
 
there do seem to a bunch of new 4's popping up, me being one of the new owners. Is there a 4 sharpening thread, or recurve in general, that details the best way to go about convexing these style blades?
 
Makes it a beast. :thumbup:


14329957305_5d9f76e405_b.jpg
 
Agreed, convex 'chax is where it's at.

I use my work sharp, but had I known about the Harbor Freight 1x30 I'd have gotten that instead.
 
JDMiller said:
Do you guys just free hand/eyeball grind a angle or do you have some kind of angle wedge thingy you use?

.
Click to expand...

For convexing I'm not so much worried about angles as much as I am about rounding the shoulder and thinning the edge. For that I use my eyecrometer and freehand meter.
 
tobiism said:
For convexing I'm not so much worried about angles as much as I am about rounding the shoulder and thinning the edge. For that I use my eyecrometer and freehand meter.
Click to expand...

So for convexing you're talking about rounding the top of the saber grind edge in the middle of the blade, not right at the cutting edge

When people talk about doing a convexing, are they just talking about a saber or scandi grind Knives
 
JDMiller said:
So for convexing you're talking about rounding the top of the saber grind edge in the middle of the blade, not right at the cutting edge

When people talk about doing a convexing, are they just talking about a saber or scandi grind Knives
Click to expand...

They mean the blade edge bud.



See the bottom left hand image.
 
tobiism said:
For convexing I'm not so much worried about angles as much as I am about rounding the shoulder and thinning the edge. For that I use my eyecrometer and freehand meter.
Click to expand...

Tobilism,

Thanks for the harbour freight belt sander tip. I've been eyeing one of those dedicated knife belt sanders but couldn't stomach the cost and dedicated tool issue.

I'd like to offer something in return. I used to do a lot of woodworking and found this company below. If you need an abrasive of any type, they have it. And good quality stuff that doesn't wearout too fast unlike the Chinese stuff.

Checkout the grit selection....:eek:

http://www.woodworkingshop.com/category.aspx?id=20&f1=1"+X+30"

I might be loving me some convex, I couldn't get the mousepad thing to work or Derek's nail filing pad method either.
 
Hmm, they have a brick and mortar over in Raleigh that I've been wanting to check out.
 
The 1x30's are really easy to use.
Kinda hard to screw up.
For convexing, I'll lay mine down and run the belt away from me.
It gives me perfect control of the knife.
 
CM_Rick said:
Thanks for linking my vid, SP. I did not got into convexing the edges, but it would be very easy. Just add a layer of mouse pad under the Emory cloth, and work the blade away from the edge (backwards). Should work like a charm.
Click to expand...

I've heard of doing that to sharpen. Can you actually reprofile to convex doing that? How long would that take?
 
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