How do I convex a BK-2


Tank29

Tank29

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Ok...I'm 99.99999999% sure that I will get some flak for this but I just spent the last 3.5 hours trying to figure out HOW I put a convexed edge on my BK-2...I used search repeatedly on here and tried a dozen different ways of wording it...If someone would be kind enough to point toward a thread and possibly a video on how to achieve this on my BK-2 I would greatly appreciate it...Thanks...LOL....I need ALOT of help!!!!...LOL
 
I am sure you will get a multitude of very good answers here however there is an interesting thread on a certain blade forum that describes using a 2 sided finger nail file to convex the BK2. I haven't tried this method myself, just sounds interesting and claims to make fast work of the process.
 
put some 80 grit emery on a mousepad and work the shoulder of the blade off. You can dab a little wd-40 on the paper. Progressively work through to 100-220-320-400-600-1000-black compound-green compound. This vid should give you an idea https://www.youtube.com/watch?v=cnzeQi1YCJA . I drag the knife spine first only-like using a file-unlike the guy in vid who pushes and pulls. I would start off at much lower angle (flatter) than the vid also. There are much better convexing vids out there--and much worse--I just quickly found one relatively short and to the point. Search youtube and find the ones that make sense to you

edit: if possible use a cheap thin bladed flat grind old folder to experiment on first
 
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I did mine with wet/dry sandpaper on a mouse pad. A belt sander would be quicker (provided you avoid overheating the blade thus damaging the heat treat) but the sandpaper/mousepad thing works just fine.

If I had to do it over again, I'd forget the mousepad and use some non-slip shelving material under my sand paper. I bought a big honking roll of it the other day from a local hardware store for about $4. The stuff is great - it gives like a mousepad but it doesn't scoot around all over your desktop.

20110702_img_0268.jpg
 
SlayerOfBunnies said:
If I had to do it over again, I'd forget the mousepad and use some non-slip shelving material under my sand paper. I bought a big honking roll of it the other day from a local hardware store for about $4. The stuff is great - it gives like a mousepad but it doesn't scoot around all over your desktop.
Click to expand...


this is pretty awesome - I recently went on a search for a mousepad for this purpose...
with the death of the desktop computer and the wireless mouses not needing a pad anymore...I actually couldn't find one on my first stop -
and my 2nd stop was at wally world...where I got one...but it was SO thin...compared to what I remember a mousepad was!

great idea, bro! I'm stealing it. :dblthumb:
 
solocanoe said:
this is pretty awesome - I recently went on a search for a mousepad for this purpose...
with the death of the desktop computer and the wireless mouses not needing a pad anymore...I actually couldn't find one on my first stop -
and my 2nd stop was at wally world...where I got one...but it was SO thin...compared to what I remember a mousepad was!

great idea, bro! I'm stealing it. :dblthumb:
Click to expand...

I'd cry foul for stealing my idea if I hadn't already stolen it (more or less) from Jerry Fisk. :D
 
Good advice already given. I did a BK-2 with paper and a mouse pad and it went really well. I don't think it is necessary to start as rough as 80 grit though. I usually start with 220 and go from there. Different strokes I guess.
 
Pict said:
Good advice already given. I did a BK-2 with paper and a mouse pad and it went really well. I don't think it is necessary to start as rough as 80 grit though. I usually start with 220 and go from there. Different strokes I guess.
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I agree; I don't think you need to start that coarse.

The other thing I've found that speeds up the initial part of the job are the rubber sanding blocks that hold the two ends of the paper and just go freehand to establish the intial convexing. You can always be more precise later with 1500 and 2000 grit paper and then compound for the final edge.
 
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