What Did You Sharpen Today?

TheOne45 said:
Oh, that's the first version of my kitchen knife sharpener. From left and right there are two white arrow shape plastics to position the blade and in the middle is metal plate with screw to fix the blade.
Now I'm on third version with magnets to hold the knife.
I didn't like EdgePro idea holding the knife while sharpening.
The best thing about those systems is you can build them from scrap parts.
The only limit is your imagination.
https://drive.google.com/file/d/14GmjzAjRz_WNOoMpcjrtlDK-k8ESSZKk/view?usp=drivesdk
Click to expand...
Dang man, very cool ingenuity! I very much like it. What did that main "tower" piece come from that holds up the rod holder and is adjustable? And yea good idea on the magnets, I didn't like the idea of holding the knife on the Edge Pro either. 👍
 
LimpCroissant said:
What did that main "tower" piece come from that holds up the rod holder and is adjustable?
Click to expand...
That tower is a standard Bosch-Rexroth aluminium profile 40x40 milimeters.
The eye (pivot) is attached to standard Bosch angle piece and then to the tower.
And yes, sharpening angle is adjusted by moving this angle piece (eye holder) up and down the 'tower'.
Perhaps those two photos will tell you more. The second photo is from my first version of scissors sharpener but it's the same design.
On the first photo you can also see my strops with different diamond compounds. I made blanks from 8 milimeter thick plexi glass and attached thin leather to them with double sided tape.
https://drive.google.com/file/d/14b5w_iBkOR6bSjSiiU6Oz7YDpXk9tX72/view?usp=drivesdk

https://drive.google.com/file/d/14f7sfsv0XbzkTjgX9IH7BjTjwjAflnNm/view?usp=drivesdk
 
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TheOne45 said:
That tower is a standard Bosch-Rexroth aluminium profile 40x40 milimeters.
The eye (pivot) is attached to standard Bosch angle piece and then to the tower.
And yes, sharpening angle is adjusted by moving this angle piece (eye holder) up and down the 'tower'.
Perhaps those two photos will tell you more. The second photo is from my first version of scissors sharpener but it's the same design.
On the first photo you can also see my strops with different diamond compounds. I made blanks from 8 milimeter thick plexi glass and attached thin leather to them with double sided tape.
https://drive.google.com/file/d/14b5w_iBkOR6bSjSiiU6Oz7YDpXk9tX72/view?usp=drivesdk

https://drive.google.com/file/d/14f7sfsv0XbzkTjgX9IH7BjTjwjAflnNm/view?usp=drivesdk
Click to expand...
Wow man, yea I'm really impressed! Very innovative, you don't see a whole lot of that anymore. At least where I am. Did you just happen to have that Rexroth strut laying around, or did you have to find a 10 foot stick of it somewhere? I really like the wood stops and stone clamp you made for the rod too. One last question, where did you get the pivoting eye? Thanks.
 
LimpCroissant said:
Did you just happen to have that Rexroth strut laying around
Click to expand...
I got those parts from our scrap box at work....leftovers from projects or used parts replaced on machines like my Festo pivot eye. The stone holder rod is actually a precision pipe - outer diameter is made in 0.01 milimeter tolerance and it perfectly fits in the hole of the pivot eye.
All wooden parts are leftovers from my home projects.
 
Forgot to add that Bosch and Festo have stores all over the world so you can buy profiles and other parts. At least here in Europe you they cut you the length you want.
Bosch profile is very popular in factories.
 
T TheOne45 That's awesome man that you were able to get all that stuff from work and from what you had laying around already. It's always nice when you find the perfect piece that you need already in the garage. Very cool altogether.

I don't think we have Bosch and Festo stores here in the US. I just google mapped it and did see anything in my section of the globe. I'll keep all this in mind though in case I decide to do something similar. I don't really need it at the moment as I already have a sharpening system, I just really liked the ingenuity.
 
LimpCroissant said:
I don't think we have Bosch and Festo stores here in the US.
Click to expand...
I typed in Google 'Bosch Rexroth usa' and maps show you have representative in 2315 City Line Rd, Betlehem, PA. Perhaps they will know where to buy parts if/when you need them.

LimpCroissant said:
That's awesome man that you were able to get all that stuff from work and from what you had laying around already.
Click to expand...
Thats the fun part working in a company like ours. You have all sort of 'junk' lying arround.
I could made a pillar from a rod and make the eye holder more common but I had to try those Bosch profiles.
For my EDC sharpener I used precision Festo pneumatic cylinder with linear ball bearings. Pneumatic part didn't work any more but the rest was like new so I said why not try it out. I only added a M4 nut and M4 threaded rod for hight adjustment and eye holder is a piece of alumimium angle.
https://drive.google.com/file/d/14vvMLPrhcy9nfOzvB8LuBvCLulJcJfi-/view?usp=drivesdk
 
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TheOne45 said:
I typed in Google 'Bosch Rexroth usa' and maps show you have representative in 2315 City Line Rd, Betlehem, PA. Perhaps they will know where to buy parts if/when you need them.


Thats the fun part working in a company like ours. You have all sort of 'junk' lying arround.
I could made a pillar from a rod and make the eye holder more common but I had to try those Bosch profiles.
For my EDC sharpener I used precision Festo pneumatic cylinder with linear ball bearings. Pneumatic part didn't work any more but the rest was like new so I said why not try it out. I only added a M4 nut and M4 threaded rod for hight adjustment and eye holder is a piece of alumimium angle.
https://drive.google.com/file/d/14vvMLPrhcy9nfOzvB8LuBvCLulJcJfi-/view?usp=drivesdk
Click to expand...
Ok cool, I just typed in Bosch, looks like there are a few. Thanks.

Wow man... That thing is crazy awesome too, and again that's some real ingenuity right there! You just taught me also that those knife clamps can be bought without buying a whole sharpening system. Looks like the big river site has at least a couple available. Well, you've sparked some design ingenuity within me and made me realize that if you want to go the fixed angle way of things, all these expensive systems really aren't needed to get amazing results. I applaud your designs for sure!
 
Thank LimpCroissant for your kindness.

Those clamps work extremely well. If you pay attention they have a screw in the middle so you can tighten them very well and the blade has no chance to move.
Got them from aBay for $18 because I couldn't find them in our stores.
https://drive.google.com/file/d/157fl6Wpyu0Ro4NfXAxtu1Dk5FVrJf55E/view?usp=drivesdk
I just might get one more clamps because I have a plan to make small compact sharpener with smaller diamond files. Something like KME but with smaller handle and different file holder. I would like to try this idea.... holding the sharpener in my hands and sharpen wherever I am (living room, vacations,....).

Anyway, when I return home from vacations I will make and post a photo or two of my 2nd iteration of my kitchen knife sharpener with magnetic bead.
I might also add a photo how I change it to scissors sharpener in a few seconds.
Here is my prototype.... I built it to test my idea and it worked.
A hint... an old micrometer holder.
https://drive.google.com/file/d/159F6dj75bTwAhGmFavWQ2uGM5R8TDtH0/view?usp=drivesdk

https://drive.google.com/file/d/15JONWVQ7pYwPZu0e7N0r2OCN5AOVTAJE/view?usp=drivesdk
 
T TheOne45 You clever son of a gun... I better stop asking questions because I don't want others, who for some reason may not be as interested as I am in your homemade sharpening systems, to have to put up with all of my questions. That scissor sharpening jig incorporated into the system is really cool though man! And all those small wood pieces you've used are really impressive. My grandpa would have loved to see these contraptions as he was a big woodworker and would have got a kick out of your ideas!

Yea please do post your compact handheld rig when you do get around to it.

I bet you others would like to see all this if you were to make a thread of "Homemade Sharpening Systems", if you ever felt like doing that. I bet others, who have a similar handy man-engineering mindset have made some cool stuff who could contribute as well.

Have a good day man!
 
I'm all for prototyping. Having something you can call hand built and personal.

Two problems. The parts list and the search for said parts.

If you guys do decide to make a homemade sharpener thread. Several of us have bets on how fast it'll turn in to 3D printing.
 
I'm on vacation in apartment and those knives you find in the kitchen are never sharp (as always in all apartments I've been).
Lucky me I found my modified folding pocket sharpener in my backpack.
A few minutes work (no kidding) and those knives cut receipt paper and paper towels.
Now I just need to warn kids when they wake up.... you know... sharp knives and fingers. 😉

https://drive.google.com/file/d/15bW9N9j69Pmfqtf0MRiQFvP2LKhd1vwd/view?usp=drivesdk
 
you guys know what these are:
img2nyfq8.jpg


from 2.0mm blunt ... :
img02mce8.jpg


... to 0.2mm sharp :
img1jhe8r.jpg
 
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Letoff Letoff it's a tongue scraper. The stainless steel one (i doht recommend it for various reasons) is made in India or China, the blue plastic one was marketed by ORAL-B company. one uses this product after brushing one's teeth and tongue.
 
As a wodworker, I wonder if the steel would hold up to a little concave carving or scraping. It is interesting to me because you could use the handles to change the radius of the cut, which you can't do with a gouge or chisel.
 
QZqaM2F.jpg


Kizer makes an uptown version of this little Wharnecliff, with S35VN and titanium scales. An outstanding little tool that fits into the watch pocket of your jeans. When an on-line vendor was blowing out the N690/G10 version for under $25US, I smelled excellent cheap Christmas gifts! And I kept one for myself!

The blade had a substantial belly out of the box, so I started grinding at 17 degrees per side with a 140 Atoma diamond plate to get it straight. The steel was tough, and I made a lot of progress but I decided to live with the stubborn 1/4" or so at the tip, as a concession to not grinding away too much of a brand new blade. Two or three sharpenings down the road it should be straight at heel and point.

I worked through 400 and 600 Atomas, and the BESS machine said 177 grams.

The 1200 Atoma tested at 154.

A strop on Jende Nanocloth loaded with 4 micron diamonds got it down to a respectable 132. It seems ridiculous to sharpen a $20 knife beyond this stage, so I resisted the temptation to try to achieve double figures.

Is it still freehand if I use one of those blue plastic angle guides to set the angle at the beginning of most strokes? Serious question.
 
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