THE way to dull a blade. ;)

[Diomedes Industries]

Well I found out a new way to make a sharp knife feel like a butter knife in very little time.

I rented a insulation blower today to put some more R-value in my attic. You cannot put an entire bale of insulation into the blower at once - you need to cut it in half. So I took my Kabar Fighting knife (with convex edge) and put it to good use.

After ten bales - the edge felt like the spine!

I think should be added to edge retention tests!


TF

 

[Jeff S1]

So true, just like cutting on a glass cutting board, nasty nasty nasty.

 

[PhotonSD]

Thanks for the word. This is why I have a few cheap steak knives in the garage.

 

[Diomedes Industries]

So true, just like cutting on a glass cutting board, nasty nasty nasty.

Yeah - I didn't realize it would dull SO fast. Wow.

TF

 

[Varg Lobos]

What kind of blown-in insulation did you use? Fiberglass or cellulose?

 

[kgd]

You know it....Nothing harder on an edge, that and cardboard!

 

[Josh K]

Cutting fiberglass insulation sucks. It doesn't matter what steel you have, it just goes flat dull.

 

[udtjim]

I have never tried it but Ragweed forge has a insulation knife, I saw it today while on his site. Kinda late now though

 

[thebrain]

I did the blown in insulation thing a few times I used my cold steel large voyager it lasted about twenty bales it was only really sharp for the first 14 or so .I have used the voyager for fiberglass batt also and it lasted a while ,strangely my endura didn`t last as long on either .

 

[sodak]

Good point. I cut up some brand new carpet last year, and after 10 feet, my best knives were dull just like your's was... Oh well, learned something new. Back to utility knives...

 

[THE PUNISHER]

Hmm i use pos knives for task like that..

 

[Diomedes Industries]

Varg,

Fiberglass... Sorry - not clear.

TF

 

[smersh]

Yup, I've done it too. Utility knives for that from now on.

 

[remmmm]

Was it one of the D2 versions?

 

[wildmike]

Best way I found to cut that stuff was a toolbox saw.

 

[ben2002gsxr]

i helped one of my buddys snow plow this year and he used his benchmade to open salt and calcium bags. by the next morning the whole edge was orange from the moisture and salt corotion. that dulled the knife in a hurry!

 

[bushman14]

For my old Gerber, it was moose hair that would knock the edge off like it was never there.

 

[biggun3006]

Dishwasher killed my new boning knife.

 

[Cash427]

For my old Gerber, it was moose hair that would knock the edge off like it was never there.

For my Gerber, the resistance from the wind when I would closed the knife tended to dull the edge a little bit:foot:

 

[james terrio]

Sounds like a problem with the heat-treat!



Seriously... yeah it's true, fiberglass is tough on edges because, well, it's glass. When I insulated my shop last winter I went through a bunch of stanley utility-knife blades. Maybe CPM3V or INFI could stand up to a project like that, I dunno.