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Username Post: How hard is hard ??        (Topic#943306)
wescobts
Master Member KnifeNut!
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12-29-16 12:25.24 - Post#2628103    



I was looking around, thinking about a new knife and came across a Spyderco "rescue" which had a "hardened" point or tip to break glass. The action would be to grip the knife, with point at the heel of the hand and swing down somewhat like a hammer. Then i got to think, how hard is hard, because i usually carry a pair of pliers, and although they dont have a pointed end, i'm assuming with a hard enough swing, the glass should break, right ? The pliers are Channellocks and use 1080 steel with a hardness around the 54-56 rockwell, if my memory serves me.
 
palmerdl
Master Member KnifeNut!
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12-29-16 16:20.39 - Post#2628106    


    In response to wescobts

You're right, I believe 'hardened' is just advertising hype. I assume you're talking about breaking auto glass in an emergency. You've seen it broken before. A pile of crumbled glass pebbles. No large, sharp shards. A focused strike with any hard object will shatter it.
Don

Women and cats will do as they please, and men and dogs should relax and get use to it.


 
Berkley
Master Member KnifeNut!
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12-29-16 18:02.12 - Post#2628108    


    In response to palmerdl

  • palmerdl Said:
I believe 'hardened' is just advertising hype. I assume you're talking about breaking auto glass in an emergency. ...A focused strike with any hard object will shatter it.



Maybe, maybe not...



 
wescobts
Master Member KnifeNut!
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12-30-16 08:56.43 - Post#2628112    


    In response to Berkley

Great video, and i would probably still be beating on the window with my pliers. So its all about the carbide, go to know !!
 
palmerdl
Master Member KnifeNut!
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12-30-16 14:10.54 - Post#2628114    


    In response to wescobts

I bet your pliers work.
Don

Women and cats will do as they please, and men and dogs should relax and get use to it.


 
wescobts
Master Member KnifeNut!
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12-31-16 04:08.13 - Post#2628118    


    In response to palmerdl

I'd like to try and see, need to find an abandoned truck or car and give it a go.

Hmmm let me think, i live in a city in the heart of the rust belt, which lost 10,000 people last year alone, the third highest poverty level in the country, 2nd worst inner city school rating in the country, and third in crime in the country.

I have an idea there is a car here or there i can bust the windows out of...which is sad
 
palmerdl
Master Member KnifeNut!
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01-01-17 04:26.15 - Post#2628128    


    In response to wescobts

Well, while you're at it... I heard that thieves use a flat blade screwdriver inserted between the glass and window frame, twist sharply, and break the glass that way. Let me know if it works.
Don

Women and cats will do as they please, and men and dogs should relax and get use to it.


 
antonio_luiz
Master Member KnifeNut!
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01-01-17 12:25.12 - Post#2628135    


    In response to palmerdl

When it comes to breaking autoglass windows - where you hit it can make a big difference
I'm paranoid only cause everyone's out to get me!


 
Harry Tuttle
Journeyman KnifeNut!
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01-01-17 14:03.28 - Post#2628138    


    In response to antonio_luiz

Hi Folks,

What's the difference between light and hard?

Well,... for one thing, you can keep a light on all night.

Yeah! It's the adolescent in me. Never went away.

Harry Tuttle
 
wescobts
Master Member KnifeNut!
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01-02-17 10:55.41 - Post#2628147    


    In response to Harry Tuttle

 
PeterDE
Member
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01-02-17 11:42.06 - Post#2628149    


    In response to wescobts

I watched this hoping he would try the Victorinox rescue Knife. I have one. Now I wonder? By the way hard is relative. Some metals are harder than others. It all depends on the alloys. As he said the graphite tip is harder.

It also depends on the glass. Autoglass is a special compound designed to resist normal road hazards, but shatter into little pieces with rounded edges that make it less dangerous in an accident. It can still cut you but not the way old auto glass, that broke into big sheets with knife edges did. the hardness of glass varies too, So whacking it with one tool may not break it but another tool might. Still it's good to have one of these in your kit.
 
antonio_luiz
Master Member KnifeNut!
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01-02-17 14:06.26 - Post#2628150    


    In response to PeterDE

For autoglass I suggest a tungsten carbide drill bit sunk into a suitable hammer head or knife handle - can't think of a better combination of hard + tough

For years I carried a ColdSteel tanto with just such a mod - never had a need to use it fortunately
I'm paranoid only cause everyone's out to get me!


 
wescobts
Master Member KnifeNut!
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01-05-17 12:48.42 - Post#2628176    


    In response to antonio_luiz

It's just that i walk the city and surrounding "burbs" so much that i'm bound to walk into a situation where my assistance would be needed. As i think of it, i'm surprized that i haven't been in a crisis event by now. By all means i'm not looking for it, but if i could be helpful...
 
antonio_luiz
Master Member KnifeNut!
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01-06-17 12:20.03 - Post#2628187    


    In response to wescobts

I have a 'tactical' pen with a carbide tip - never tried it on autoglass

BTW - as when at work - unless I have no other option my first action is to call for backup

"fools rush in where angels fear to tread"
Alexander Pope 1711
I'm paranoid only cause everyone's out to get me!


 
wescobts
Master Member KnifeNut!
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01-08-17 03:26.09 - Post#2628204    


    In response to antonio_luiz

Calling for back up is my first order of business ! I have no talent or training for life saving
 
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