Knife Sharpening Slide

[MarkTurn]

A unique knife sharpener that makes your knives and tools razor sharp. A fixture holds the Arkansas soft stone and guides the blade along a slide that keeps the blade at a perfect 20° (edit: or 15°, 17°, 25°, etc.) angle. As the blade moves along the stone it forms a perfect edge. After sharpening the blade can easily slice through vegetables and paper with ease. Can be used on any non-serrated knifes.

 

[Eli Chaps]

You need a dealer membership to advertise.

 

[MarkTurn]

You need a dealer membership to advertise.

Understood. I removed the link to the sales site. I am content with feedback from the community. If the video still isn't compliant I'll switch it with an image.

 

[The Mastiff]

40 degrees inclusive is not what a lot of us are sharpening at. 30 degrees inclusive is easy using the modern powder steels at higher hardness a lot of us are sharpening our everyday knives at. It's rare I'll sharpen at 40 degrees now. It's a limited and limiting system as is now.

Joe

 

[Smaug]

40 degrees inclusive is not what a lot of us are sharpening at. 30 degrees inclusive is easy using the modern powder steels at higher hardness a lot of us are sharpening our everyday knives at. It's rare I'll sharpen at 40 degrees now. It's a limited and limiting system as is now.

Joe

I think there are different angle angle slides.
Also, modern powder steels at higher hardness are not great on soft Arkansas stones anyhow. Diamond would be The Way...

*******
It looks like a nice setup. Is there anything that keeps the stone from grinding down the sliding angle guide? ...or is it not in contact with the stone?

 

[MarkTurn]

40 degrees inclusive is not what a lot of us are sharpening at. 30 degrees inclusive is easy using the modern powder steels at higher hardness a lot of us are sharpening our everyday knives at. It's rare I'll sharpen at 40 degrees now. It's a limited and limiting system as is now.

Joe

Thanks Mastiff, The design can be easily modified to include 30° inclusive angle. I'll make that an option. Also, I am thinking of making the back of it 75°/80° to sharpen scissors.

 

[MarkTurn]

I think there are different angle angle slides.
Also, modern powder steels at higher hardness are not great on soft Arkansas stones anyhow. Diamond would be The Way...

*******
It looks like a nice setup. Is there anything that keeps the stone from grinding down the sliding angle guide? ...or is it not in contact with the stone?

Thanks for the feedback Smaug, The slide is not in contact with the stone so it will not wear down the slide. The slide has linear bearings embedded in it that slide along the rails.

 

[afishhunter]

40 degrees inclusive? Might be useable on my axe (though I prefer 30 degrees inclusive on it); not any of my knives. If it was 10 degrees per side (20 degrees inclusive) for a knife, I'd be interested. No doubt cost would prevent me from buying, however.

40 degrees or more obtuse inclusive is dull/don't slice worth a daRn.

 

[Smaug]

40 degrees inclusive? Might be useable on my axe (though I prefer 30 degrees inclusive on it); not any of my knives. If it was 10 degrees per side (20 degrees inclusive) for a knife, I'd be interested. No doubt cost would prevent me from buying, however.

40 degrees or more obtuse inclusive is dull/don't slice worth a daRn.

I have to disagree here. Thickness behind the edge has more impact on "sliciness" than the angle at which the edge is sharpened. That's why hollow grinds and full flat grinds are popular, these days.

Maybe you meant 20° behind the edge/main bevel? Then, put a 40° micro bevel/edge on it. This makes it a LOT easier to re-sharpen and more durable to boot. All my knives are sharpened (micro bevel) @ 20° and I can assure you're they're not dull. Many are slicey, too.

 

[Smaug]

MarkTurn: Any thoughts of either including a diamond stone or offering a model that retrofits to a DMT or other widely available diamond stone? I think you will find your market is a LOT bigger if there are abrasive options that will handle the harder steels and even ceramic.

 

[MarkTurn]

MarkTurn: Any thoughts of either including a diamond stone or offering a model that retrofits to a DMT or other widely available diamond stone? I think you will find your market is a LOT bigger these if there are abrasive options that will handle the harder steels and even ceramic.

Absolutely, I am using a Dan's Whetstone right now which is great, but I need something coarser for blades in bad condition. Could you give me a product name and model I could look up for a diamond stone or DMT? If I did one that is two sided, what grits would you want?

 

[Smaug]

Absolutely, I am using a Dan's Whetstone right now which is great, but I need something coarser for blades in bad condition. Could you give me a product name and model I could look up for a diamond stone or DMT? If I did one that is two sided, what grits would you want?

If I could only have two, I'd want extra coarse and fine.
Then 15 and 20° guides.
Re-profile with extra coarse at 15°, then apply a 20° micro bevel for the cutting edge.

I don't know if they make double-sided hones, except for their own systems, but here's their page with bench stones:
https://www.dmtsharp.com/sharpeners/bench-stones/diamond-whetstone-bench-stone.html
(no affiliation)

I really liked those when I had them, but without some way of holding the angle reliably, they just didn't do it for me. I wasn't looking to make sharpening into a whole sub-hobby. I really liked using water instead of oil.

 

[afishhunter]

I have to disagree here. Thickness behind the edge has more impact on "sliciness" than the angle at which the edge is sharpened. That's why hollow grinds and full flat grinds are popular, these days.

Maybe you meant 20° behind the edge/main bevel? Then, put a 40° micro bevel/edge on it. This makes it a LOT easier to re-sharpen and more durable to boot. All my knives are sharpened (micro bevel) @ 20° and I can assure you're they're not dull. Many are slicey, too.

Nope. I always lay the blade flat then raise the spine just enough so that all but the edge clears the stone. That is how I was taught to sharpen.... that and push the edge over the stone, never pull, to avoid a wire edge.
Father, uncles, paternal and maternal grand parents, paternal, great grand mother, maternal great grand father, and maternal great-great grand mother, were all in agreement that if you got a wire edge/bur, you F'd up ... and they let you know it. Wire edges/burs were "bad" and to be avoided back then, unlike today.

 

[fishface5]

OMG I have been trying to dream up exactly this, but as a chassis that could go over different sizes of stones & the ability to adjust angles. That would give a lot if flexibility.

 

[Smaug]

Nope. I always lay the blade flat then raise the spine just enough so that all but the edge clears the stone. That is how I was taught to sharpen.... that and push the edge over the stone, never pull, to avoid a wire edge.
Father, uncles, paternal and maternal grand parents, paternal, great grand mother, maternal great grand father, and maternal great-great grand mother, were all in agreement that if you got a wire edge/bur, you F'd up ... and they let you know it. Wire edges/burs were "bad" and to be avoided back then, unlike today.

The wire edge comes from grinding the opposite side at the exact same angle all the time, no matter the direction of sharpening. (toward or away from the edge) It's a natural byproduct of precision sharpening.

Doing it by hand, I wouldn't be surprised you didn't get a wire edge, as the sharpening angle is always changing a bit.

The wire edge is the real reason for stropping. After the blade is sharp, strop to break off the wire edge, leaving only the sharpened edge. All due respect, but your progeny were wrong; it was not based on science, but is an old wives tale.

Check out The Razor Edge Book of Sharpening, by John Juranitch, to learn more about it. It's the one where, on the book cover, he's shaving his beard with a double bit axe. :-D It's a quick and entertaining read.

 

[afishhunter]

.
Check out The Razor Edge Book of Sharpening, by John Juranitch, to learn more about it. It's the one where, on the book cover, he's shaving his beard with a double bit axe. :-D It's a quick and entertaining read.

It is hard for me to take anyone who shaves seriously. Politicians have less than zero credibility, they all shave. So do all the "TV Evangelists" and most "preachers". Leviticus 25:27(?) says "Don't trim the edges of your beard" (I read that as "don't shave". I loathe shaving, so "no problem" ) just after the "don't get tattoos." if I remember right.

Most beardless "gentlemen" I've met in person in this "lifetime" have been somewhat less than "trustworthy", and/or full of beans.

(FYI: Easiest way to tell when military officers, politicians, government officials, "news casters", the "weatherman" and most preachers is telling a fib: Their lips move.)

 

[unwisefool]

Most beardless "gentlemen" I've met in person in this "lifetime" have been somewhat less than "trustworthy", and/or full of beans.

This might be one of the most inane things I've read here on this site. So you wouldn't take advice from someone who is clean-shaven because of some silly, prejudicial belief?

I love how people will cherry pick passages from Leviticus but completely ignore the other mandates that are written.

 

[Grateful]

It is hard for me to take anyone who shaves seriously. Politicians have less than zero credibility, they all shave. So do all the "TV Evangelists" and most "preachers". Leviticus 25:27(?) says "Don't trim the edges of your beard" (I read that as "don't shave". I loathe shaving, so "no problem" ) just after the "don't get tattoos." if I remember right.

Most beardless "gentlemen" I've met in person in this "lifetime" have been somewhat less than "trustworthy", and/or full of beans.

(FYI: Easiest way to tell when military officers, politicians, government officials, "news casters", the "weatherman" and most preachers is telling a fib: Their lips move.)

Beard or not, there’s no doubt that you are completely full of beans.

 

[Eli Chaps]

Here's my take on the device...

I think it is creative but stone size variance might be a challenge. You might be best off finding a handful of stones and making it just for them.

I think on knives with belly at the tip, you will eventually develop wide bevels up there.

You lose about a third of stone's usefulness.

I'm not overly fond of gadgets in sharpening but if it gets people to actually try sharpening then so be it.

 

[unwisefool]

Here's my take on the device...

I think it is creative but stone size variance might be a challenge. You might be best off finding a handful of stones and making it just for them.

I think on knives with belly at the tip, you will eventually develop wide bevels up there.

You lose about a third of stone's usefulness.

I'm not overly fond of gadgets in sharpening but if it gets people to actually try sharpening then so be it.

I would say definitely make one for the dmt diamond stones. I see what you are saying about the edge, but it could be useful for the straight edge on a longer fixed blade, and just do the tip freehand.