Where I can find Spyderco Strength Ratings? (heavy duty, super heavy duty, etc)?

G

GaryPham

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Jan 1, 2006
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Hi guys, I saw some people mention in some other posts something about different "strength ratings" or some sort for different spyderco models. Such as how the endura was heavy duty and the manix was super heavy duty. Can someone show me where on spyderco website do they display all the different strength ratings of different models? I'm especially curious to see where the Native and the D'allara droppoint is rated at. Thanks

PS. Sorry if this question has been exhausted, I couldn't find anything when I searched for it.
 
this isnt excatly what u were looking for but its interesting....
(it was originallly posted by 4 s ter)


Here's a posting from Sal on the Spyderco.com Forum which has lots of info regarding lock strength and Spyderco's rating system.



First of all, Spyderco has set up our own in-house standards on lock strength to provide our own parameters for manufacturing.

We have established an in house test that breaks knives and records the break. We get a graph and numerical results of the break.

A knife is put into a vise and a probe applies pressure to the handle. The distance from the pivot pin to the probe is measured in inches. This is the leverage arm. If the probe takes 100 lbs of pressure to break the lock and the probe is 3 inches from the pivot, then the amount of force is measured as; "3 inches times 100 lbs equals 300 inch lbs of force to break the lock (or blade or ?).

We then established a standard for our own knives. We decided that we would use the inch lbs of force to break the lock times the length of the blade to establish thresh holds.

25 inch/lbs of force for every inch of blade length would be considered a "light duty service". That means that a 2" blade needs to hold 50 inch/lbs of force to meet the "light duty service" requirement.

50 inch/lbs of force per inch of blade would be "medium duty service". This means that a 2" blade times 50 inch/lbs of force equals a minimum of 100 inch/lbs of force to break the lock.

"heavy duty service" is 100 inch/lbs of force per inch of blade is required to break the lock. This means that a 2" blade times 100 inch/lbs of force equals 200 inch/lbs of force is required to break the lock.


MBC is 200 inch/lbs of force is required for every inch of blade length to break the lock. This means that a 2" blade times 200 inch/lbs of force equals 400 inch/lbs of force is required to break the lock.

This is not intended for any other knife companies or custom makers. It is our own standard that we test to with every model in every shipment or run in our own facility.

I hope that helps.

sal
 
I'll see if I can find the thread where Sal explains what is meant by each rating.

It's basically the amount of weigh it takes for the lock to fail, per inch of blade.

Off to search...

LOL...nevermind, the post above me just answered it. Helps if I pay attention.
 
GaryPham

In response to your question about the Native, Sal has said:

"Our USA made Native runs in the hi "medium duty" range. about 90+ inch/lbs per inch. The model is also very reliable, which is even more important than ultimate lock strength."

I can't remember seeing a D'Allara rating. Spyderco does not publish a list giving the ratings for each knife. You have to pick them up on at a time from Sal's posts.

The Martial Blade Craft (MBC) rating has been replaced with a "Very Heavy Duty" rating.

Not to confuse the post above, but the ratings aren't necessarily lock strength ratings - they are the levels at which the knife fails. Sal has said:

"Our FRN knives usually hover around high medium duty, close to heavy. The weakest point is usually the FRN"

If I remember correctly, Sal (or another Spyderco employee) stated that more often the pivot or stop pins rip out of the FRN scales, the stop pin shears off, the tang breaks, etc.

Hope this helps!

David
 
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