Getting the lines out of this plunge

B

Brian.Evans

Registered Member
Joined
Aug 20, 2011
Messages
3,267
I'm am having a heck of a time getting the last little bit of the grind lines out of this plunge. Just keep at it or am I doing something wrong?

Any suggestions? I've tried running from tip to plunge and wiping up, but I'm thinking I'm just going to end up washing out the plunge.

20140905_101111.jpg


20140905_101138.jpg
 
Chisel edge sanding bar... allows you to wrap the paper tight AND see right to the edge of your bar.

Sand into the plunge at an angle until all those perpendicular scratches are gone.

THEN sand lengthwise. :)
 
Response from the man himself. Thanks Nick! This knife was inspired by the paring knife you posted up, btw.

I'll chisel one edge of my bar and try it again.
 
Agreed. The lengthwise hand sanding of a blade provides very little abrasive action the the plunge area. Often special attention must be paid to this area. I frequently use a half-length sheet of paper in each grit to concentrate on the plunge while hand finishing along the length of the blade. If I notice scratches that I don't think will clean-up with length-wise sanding (this happens on almost every knife in my case), I will resort to "sanding into the plunge" (as stated by Nick Wheeler) to eliminate the lines. Finally, I complete the length-wise sanding along the blade after the scratches near the plunge are removed.

Mike L.
 
Chisel edge works fine for me. It gets into the plunge more than you think it does. It takes some work but they do sand out. I'm by no means an expert but I've went that route on all 3 of the blades I've done so far and all 3 had file lines and 80 grit paper lines going vertically and I was able to get them all out using Nicks method described above. Like I said it takes some time but works very well.

Jay
 
I believe that is MY knife being made by Brian. THANK YOU for going to such great lengths to make everything perfect. I should have it next week and will add my own scales, then post some pics. Mr. Wheeler, THANK YOU for the tech advice and help. What a great story for my kids and grandkids.
You guys are makng an old man feel like a giddy school girl. :D
 
Well, lest someone get upset, I do need to add that I bought the knifemaker membership today, but it is saying there are no.public usergroups for me to join. Not sure how to fix it, but the money has been paid!
 
You should be able to update your usergroup.
Something about clicking on something in the top right.
I know not much help but somebody will be along shortly Im sure to help.
Excellent knife by the way. My first and only knife still has grind marks in the plunge. But its mine so I don't care too much.
Cheers
 
Be carefull with chisel sanding bar if the blade is not hardened, it concentrates too much weight on a single spot/line and if you move away from the plunge and put that presure on the edge it may bend. Take it slowly and everything will be fine.

[edit] it also appears you went too close to the spine with the coarser grits or tried to correct the plunge symmetry by pressing too much. Both things happened to me :)

Pablo
 
Last edited:
peu said:
Be carefull with chisel sanding bar if the blade is not hardened, it concentrates too much weight on a single spot/line and if you move away from the plunge and put that presure on the edge it may bend. Take it slowly and everything will be fine.

[edit] it also appears you went too close to the spine with the coarser grits or tried to correct the plunge symmetry by pressing too much. Both things happened to me :)

Pablo
Click to expand...

It's already hard.

I don't think you're seeing what you think you're seeing on the picture regarding the plunge. The picture kind of makes stuff look much worse than it really is due to lighting. There is a definite curve at the top of the plunge but the flats aren't sanded to show it.
 
If its hard then no problem... chisel-sand it hard :)

I don't see the metal you used, as I mostly use stainless they always go into the oven ss foil wrapped, so you can almost finish sanding them before HT, I sand it sideways and run a loupe looking after these top/bottom scratches...


Pablo
 
By the way, these are at 4 or 5X magnification. If you want to see where your fit and finish needs work, take pictures under moderate magnification.
 
That looks fanatastic!
 
Looks like you're nearly there man. BTW, I don't know about you medicvans, but it still amazes me every time I do a hand finish, and the realization of just how crappy a belt finish really is. I mean you can look at a belt finish and not see a blemish one, but as soon as you start to hand sand on that belt finish, it will instantly reveal just how bad a belt finish is in comparison. I use to leave a belt finish on all of my knives, now all of them are hand finished. It definitely adds some headache and time to the build, but my goodness, it's so worth it in the end.
 
Last edited:
take a wood chisel shaped piece of anything hard, g10 for example, tightly bend the desired grit sandpaper over it and sand...


Pablo
 
1/4 x 1/2 inch EDM stones work well for the rough stuff.
 
You must log in or register to reply here.
Back
Top