First attempt at hollow grinding

Thanks Mike. I wasn't planning to take it that high, but it actually worked out better because it allowed the point to taper more.
Scott
 
Great looking grinds I like the look of both of them. Some argue bassed on the intended use which has an advantage orer the other. I gennerally go all the way to the spine but not allways. I go to the spine because I think the thinner blade slices better. However if I wanted a stronger blade I would go half way.

I have started out thinking I would go half way but then I went higher and higher up the blade so that both sides were even.

Keep up the good work nice clean riccaso shoulder. Nice little blade all round.
 
Thanks Reg. It's one inch stock D2, 3/16" thick. I think being one inch may have caused it to be higher. With it being 1", it will be probably more effective being ground higher. I also use 1 1/4" and 1 1/2" barstock. They should be easier to keep the grind not as high. I'm still learning to hold in a consistent position on the grinder.
Scott
 
I think I'm getting hooked on these hollow grinds. :D This is the second one I've been working on. I wanted to try a little longer blade to see if I can be consistent. This is about the height at which I would like my grinds to be. The first one is a little higher then I prefered. I still have a long way to go to acheive consitent grinds, of course I'm never satisfied with my work, always striving to better myself. Here's a pic, what do you think of this one. Thanks

hollow3.JPG


Scott
 
I think you've about got it whipped Scott. The only thing left is get confident about it :D Its gonna be second nature pretty soon.
 
You are doing a great job with your new ten inch wheel! Those grinds are really looking good, Scott. I'll have to get you to give me some pointers.
 
nice work ... I just finished my first knife last week and my second this week. When I ordered my Bader 3 I was going to skip the contact wheel , glad I didnt as I like doing hollow grinds better than flat grinds ( well my hollows look better then my flat grinds ;) )...

such an addicting hobby...
 
I don't much care for hollow grinds, but if a knife is going to have one I for one want it going as far up as I gan get it, looks like you nailed it.
 
Thanks for the encouraging words. ;) Now I feel I can offer my customers the grind they prefer although my convex grinds seem to be pretty popular. once you educate the perspective buyer about them, they understand more about that type of grind
Scott
 
Nice job. Hollow grinds are tougher than alot of people think. Getting them even from one side to the other is the hard part. I use a micrometer to measure the distance from the spine to where the grind stops to get both sides as close as possible. I also try to get the radius in the corner the same on both sides.

Rough grind the hollows and get them close on both sides and fine tune the height and radius with the finner grits.

Your doing great.


Do you have a variable speed grinder?

Michael
 
Thanks Michael, no I do not have a variable speed. I have the three step pulley on my KMG. I just grind on the slowest speed. I do just as you stated, in the beginning of your post. Rough grind, check w/calipers, that's what I do with all my grinding.
Scott
 
Razorback - Knives said:
Thanks Michael, no I do not have a variable speed. I have the three step pulley on my KMG. I just grind on the slowest speed. I do just as you stated, in the beginning of your post. Rough grind, check w/calipers, that's what I do with all my grinding.
Scott
Click to expand...
Beg, borrow or steal what ever you have to to get a variable speed grinder. You wont be sorry. I end with 5000 grit on the hollow grind and the grinder is slowed down to a crawl. Trizac now has 3000 and 4500 grit belts and they are great. The trizac belts last forever. I highly recomend them

Here is the grits I hollow grind with to get a mirror finish
50/60
120
220
400 or 45 micron
heat treat
400/ 45 micron
30 micron
16 micron
6 micron
5 micron
3 micron

then 4 different grits on the buffer ending with pink no scratch.
It is very time consuming but it works for me.

Maybe this is a good idea for a seperate thread. "What do you use to get a mirror finish"

Keep up the good work

Michael
 
Wow! You do use alot of different grits. In all honesty I don't do mirror finishes, mainly because I make working grade knives and feel the extra effort for a mirror finish is only going to be scratched from using the knife. Now on my 5160 knives, I'll buff to an almost mirror, but then again 5160 is easy to get a good shine on. Thanks for the tips, I do appreciate it. Another thread might prove helpful. ;)
Scott
 
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