Cutting Competition

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Jan 15, 2006
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There is another thread asking why CPM-M4 dominates the cutting competitions. It generated a lot of interest and became a very informative thread. I am starting this thread for ongoing general discussion of cutting competitions.

A little background for those of you unfamiliar with the competitons.
The cutting competitions were started several years ago by the American Bladesmith Society. The idea was to test who could make knives that would stand up to a number cutting challenges. At that time, all of the cometitors had to make their own knives.

The competitions have since been taken over by Bladesports International. Competitors now do not have to make their own knives and even factory knives are allowed as long as the knife has been tested and certified by Bladesports. Likewise all competitors must be trained and certified by Bladesports.

Bladesports stages a number of competitions around the U.S. during the year. Many events are held in conjunction with knife shows or other knife related events. The competitors (cutters) earn points in each event and the top eight are invited to compete in the World Cutting Championship at the Blade Show in Atlanta in May.

Most competions are multi-stage courses where the cutters are faced with a number of cutting challenges in a timed event. These challenges often include chopping through a 2x4 (the best cutters can do it in less than 2 seconds), cutting hanging 1", 2" and 3" thick ropes, cutting through hardwood dowels, cutting rolling tennis balls or gold balls in half, slicing through water bottle or soda cans, and finesse cuts like slicing rings off of a paper tube or a plactic drinking straw.

It is a real test of the knife in that it must be tough enough to chop through 2x4 (usually twice) yet stay sharp enough to slice paper and remain undamaged. It is also a test of the cutter's skill. Most will tell you the technique wins over strength.

That's the simple explanation. There is more to it and you can find all of the information, rules, and schedule of event on the Bladesports Internation website at BLADESPORTS

This is an exciting and educational sport. I hope this is an ongoing discussion thread about the competitions, the knives, developments and the competitiors. One of the regular competitors, Donavan Phillips has agreed to join in and answer questions and I hope others will too.

I have been following the competitions for about 3 years now and I have been asked to write previews and reviews of the events for Blade Magazine over the last couple of years. In doing so, I have interviewed and gotten to know several of the cutters and learned a lot about the sport even though I have never competed.

So, please join in, ask questions, and offer your comments. If you get the opportunity, attend a competition. It is great fun.

Mike
 
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The Bladesports International 2009 schedule of cutting competitions:

In the U.S., the 2009-2010 season points championship consists of eight events. The top eight U.S. cutters in points are invited to compete in the world cutting championship.

1. 08/01/2009 – North Texas Cutting Competition
2. 09/12/2009 - BLADE Show West
3. 09/12/2009 - Shepherd Hills Cutlery
4. 10/03/2009 – Northwest Knife Collectors 11th Annual Knife Show
5. 10/17/2009 - Smokey Mountain Knife Works
6. 12/5-6/2009 - Lone Star Cutting School and Competition
7. March TBA- Northwest Cutting School and Competition
8. 05/08/2010- Blade Sports season points Championship
9. May 2010 - 2009 World Cutting Championship - Blade Show
 
I'm interested in how much of a role the actual steel/heat treat/blade geometry plays, versus the skill and strength of the competitor.

It seems that the best knife would be long, for leverage and speed, and have a strong forward weight bias and as acute an angle as possible -- the limitation being mostly being able to get through a hardwood dowel without edge damage.

I don't see any advantage for a small knife.

If competitors were really pushing the limits, I'd expect to see a lot of disqualifications for edge damage, as the competitors try to get as much as possible out of acute edge geometry.

But I don't know whether it's better to have a slightly stronger edge and just power through the 2x4 or whether it's better to back off on the power to let a more acute edge do the work.
 
Both the knife and the competitor play a critical role.

If the knife is significantly damaged during the competition it can be disquaified so having a knife that can withstand the chopping yet retain a fine, sharp and undamaged edge is a must.

As for the cutter, nearly all competitors I have talked to said it's really about technique rather than strength. Several of the cutters are not particularly big guys. Gayle Bradley is two-time champion and still one of the top cutters at 65 years old and 140 pounds.

The knives are generally the maximum allowed blade length of 10" long x 2" wide. There are no limits on thickness but most are a little over 1/4 at the spine, flat ground with a very acute convex edge. Most weigh in around 1.5 - 2 pounds. Most competition knives used today are CPM-M4 with a Rockwell hardness of around 61.

CPM-M4 is preferred because it can be ground to a very thin edge at a high degree of hardness and still withstand the chopping without chipping.

Knife design is a very important element. Gayle Bradley explained to me how important the handle design is. Gayle said "You don’t have to hold the knife with a death grip. On a finesse cut, if you lock that knife up in your hand like a club you can’t get the tip speed. It’s like a golf swing. When you break that club over, just before it hits the ball, your wrists are not locked up. It’s the same thing with that knife. You’ve got to be able to use that knife to generate that speed and if the handle doesn’t allow you to do that, then you’re fighting the mechanics of the handle."

The grip also has to be comfortable for the individual cutter. Having to regrip wastes time and seconds count in a competition.
 
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Reggie Barker's competition knife. Reggie won the world cutting championship in 2004, 2005 and 2007
Blade07%20421.jpg


Gary Bond's 2008 World Cutting Championship Knife
Champknife2008.jpg


Shawn Scott's 2009 World Cutting Championship knife
ScottKnife1.jpg


Gayle Bradley's competition knife. Gayle was season points champion in 2007 and 2008
BC.jpg
 
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I can't wait until I see a competition.

I wonder since Crucible Steel is in chapter 11 if CPM M4 steel may become unavailable. I am sure someone take over or duplicate it when the formula is for sale.
 
I talked to Reggie right after he won in 07, and fondled his knife for a while(and almost bought it, even though i don't compete). He was still sweating pretty good and I'm sure he was pretty tired, but he was more than happy to talk about his knife:thumbup: With the big rubber slabs combined with the perfect balance of the 10" blade you could tell this knife was made with one thing in mind...performance for these competitions.
Was at Blade this year, but missed the competition. Hope to make it next year, these guys have amazing skills!

Thanks for the thread! Should be very imformative:thumbup:
 
Interesting, I would like to know more about the knives also; like what type of steel Reggie Barker used then and now and the heat treatment process.

There is so much detail to learn. I've began educating myself about Power Metallurgy and blade formation process.
 
There is another thread asking why CPM-M4 dominates the cutting competitions. It generated a lot of interest and became a very informative thread. I am starting this thread for ongoing general discussion of cutting competitions.

A little background for those of you unfamiliar with the competitons.
The cutting cometitions were started several years ago by the American Bladesmith Society. The idea was to test who could make knives that would stand up to a number cutting challenges. At that time, all of the cometitors had to make their own knives.
Thanks for posting the Cliff Notes version:thumbup:
I always wondered how they worked

I envision a day when evey knife maunfaturer has their cutting team
with uni's...with water boys...and managers with bull horns...and cheerleaders off to the side...:eek:

Where are the specific rules?
Free Hanging Rope Cut – This will be an elimination style cut. The top 3 cutters may be awarded prizes. Points may be awarded for event totals and yearly totals. In case of a tie awards will be shared.
What kind of rope is used? hemp? manila? sisal?

I like the looks of this one the best
ScottKnife1.jpg


What are the advantages and disadvantages of having a blunt/rounded tip(point?)
Does the blunt tip perfom better in some event types?

Do they stream the World Championships live online? Is there video available?

On the water bottle/cans event type
Do you get points deducted if you fail to cut through a single bottle? What are the situations where you get penalized?
 
Where are the specific rules?

General Rules are on the BSI website at http://www.bladesports.org/eventtypes.html. However, since each competition is a little different, each has it's own specific rules.

What kind of rope is used? hemp? manila? sisal?

I am not certain but I think at the 2009 Chamionship it was a treated manilla rope.

What are the advantages and disadvantages of having a blunt/rounded tip(point?)
Does the blunt tip perfom better in some event types?

Many competitiors have gone to this design because it allows more weight to be forward on the blade.

Do they stream the World Championships live online? Is there video available?

There are several videos available on the BSI website and on YouTube. Just Google "Cutting Competition"

On the water bottle/cans event type
Do you get points deducted if you fail to cut through a single bottle? What are the situations where you get penalized?

You get points for each can or bottle cut. For cuts like the paper tube or gallon waller jug, you get points for each slice.

[/QUOTE]
 
I have already introduced myself in the other thread that Mike referred to in the first post of this thread, but for those of you just joining us, I am Donavon Phillips and I compete in the BladeSports competitions. I am proudly sponsored by Spyderco. I will be glad to answer any questions, I will do so to the best of my ability. And I would like to thank Mike C. again for starting this thread.
 
I'm surprised that competition blades don't have any curvature. Wouldn't some curvature help cut the thick rope?
 
I'm surprised that competition blades don't have any curvature. Wouldn't some curvature help cut the thick rope?

Cutting is all technique, well 80% anyway and the other 20% is the knife itself.
 
Really enjoying this thread Mike, thanks ! :thumbup:
Hope ya' don't mind if I post one I picked up from Bailey Bradshaw two years ago.
He built it to compete with and found himself too busy to use it, forged CPM3V, 10" blade, 15" oal, rubber handle.

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Doug
 
Cutting is all technique, well 80% anyway and the other 20% is the knife itself.

I wouldn't say it's only 20% knife. If the knife fails then the competitor is disqualified and gets no points. Even if it does not fail, it has to stay sharp enough for some finesse cuts after doing some heavy chopping or else they won't make those cuts and lose points.

Almost anyone can compete. Those who practice more and develop their technique are of course going to generally do better.
 
I wouldn't say it's only 20% knife. If the knife fails then the competitor is disqualified and gets no points. Even if it does not fail, it has to stay sharp enough for some finesse cuts after doing some heavy chopping or else they won't make those cuts and lose points.

Almost anyone can compete. Those who practice more and develop their technique are of course going to generally do better.

That's pretty much what I ment, I know the percentages are off.

To be great at something you have to have great equipment, great technique and practice a lot. That goes for a lot of sports though.
 
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