how are cartridge and utility razors sharpened?

[Heiheit]

I've always wondered how they are aharpened. I figure they would just use a belt sander,but it seems like that would be hard to do considering they are so small. The edges on utility blades look like they were done on a belt sander, but I honestly have no idea. I've also read somewhere that cartridge razors are actuall "broken" to get an edge, but I doubt that.

thanks for the help.

 

[Kbrasmodeler]

There was an episode of Modern Marvels, on the History channel, that talked about this. These blades are much thinner than a sheet of paper, and they use very fine grinding wheels to put a primary, secondary, and finally a tertiary bevel on them. It was all done by machine and controlled by computers. They were described as "the sharpest steel objects in the world".

 

[Heiheit]

Fascinating. I will look up the episode to see what they say.

 

[Heiheit]

I just found this series of videos: http://www.youtube.com/watch?v=GxMA4dcp8T0

Interesting, but I think some would disagree with the part about modern knives

 

[axtalan0]

Thanks for finding that cool video. I knew razor blades were sharp, but I never knew just HOW sharp. Measured in angstroms... mind-boggling.

I wonder how people in the future will shave? Perhaps low intensity lasers? Or will genetic manipulation finally rid us of all unwanted hair for good?

 

[tnt-user]

They were described as "the sharpest steel objects in the world".

Television lying again

 

[unwisefool]

Television lying again

So what is the sharpest object?

 

[Esav Benyamin]

... unwanted hair ... ?

Who says it's unwanted?

 

[tnt-user]

So what is the sharpest object?

In theory that would be a blade made of obsidian. Allthough that would be brittle. For steel it honestly can be done to razor blade level if you work on a very fine stone for awhile. I nearly did so with the on my leatherman which has a 20 degree edge.(per side)

 

[Joshua J.]

So what is the sharpest object?

My ZDP-189 Caly 3 just after sharpening it flat with the primary grind (I put a ten degree per side micro bevel on it soon after).
I assure you it's not terribly hard to get your knives sharper than a disposable razor.
A thinned out edge and a lot of polish is all it takes.

 

[spoonrobot]

In theory that would be a blade made of obsidian.

To be fair, the video did say the sharpest steel object. I would hazard to guess that some of the knives pictured in the Maintenance forum are a good deal sharper with significantly thinner edges.

 

[tnt-user]

To be fair, the video did say the sharpest steel object. I would hazard to guess that some of the knives pictured in the Maintenance forum are a good deal sharper with significantly thinner edges.

I'd wager your right. Darn knife bug.

 

[FTO_dude]

Thanks for finding that cool video. I knew razor blades were sharp, but I never knew just HOW sharp. Measured in angstroms... mind-boggling.

last i checked you could measure anything in angstroms...

 

[axtalan0]

But it is not practically useful to do so, is it?

If I tell you I live 3.67832356 quattuordecillion angstroms away from NYC, tell me, where do I live??

Well?

 

[unwisefool]

But it is not practically useful to do so, is it?

If I tell you I live 3.67832356 quattuordecillion angstroms away from NYC, tell me, where do I live??

Well?

up or down? that might help a little

 

[dtownknifekid]

So what is the sharpest object?

I believe the sharpest object (non steel) is either a tungsten probe or a dimond knife. Don't quote me on this though, its been a while since I saw thay episode. It was on one of the commercial break test.

 

[uncouth]

I think they said ONE OF the sharpest tools made from steel, not THE sharpest. (emphasis added)

 

[godot]

I don't know how they are made, but I resharpen my utility blades with sandpaper.