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Kershaw Breakout 7000 - Automatic knife release modification.

Folks,

I must say I am really impressed with the opening speed of the Kershaw Breakout 7000.

This thing is lightning fast! It is a top button lock with a coil spring. In my experience I have not been a big fan of top button coil spring openers, because they were not as fast as leaf spring opening automatic knives and they lacked said opening authority.

The only thing I didn't like about the Kershaw was the "rough grindy feeling" when I pushed the release button.

Ok, so, I had to find out what made this thing so special so I took it apart.

I discovered it had a different coil spring than I was used to seeing, it was flat and had 6 windings.

While I had it apart, I polished the release button and the blade where the button made contact.

After reasembly, there was no more rough grinding feeling on opening, it was smooth as silk and still fast as ever.

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Permalink Reply by Terry Waldele on November 7, 2010 at 19:46

Hey Daniel,

You clever devil, you! Now that's what this Group is all about!

Thanks for sharing!

Terry

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Permalink Reply by D ale on November 7, 2010 at 20:21

Nice job Dan !!!
.. unique spring.

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Permalink Reply by Daniel Howland on November 8, 2010 at 5:34

Thanks guys! here is a closer look at the spring. I wonder where these can be purchased....

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Permalink Reply by Steve"Hog"Hanner on November 10, 2010 at 20:44

I have never seen a spring like that Daniel, but that is a great look inside a Kershaw!

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Permalink Reply by D ale on December 11, 2010 at 22:33

Daniel Howland said: "I wonder where these can be purchased...."

http://www.newcombspring.com/torsionsprings.html .. these guys could do it .. but one off pricing would probably be prohibitive.

I'd just duplicate the existing matl & coil dimensions if you want to twist your own .. here's a quick down & dirty for twisting springs .. http://home.earthlink.net/~bazillion/types.html

I checked McMaster Carr .. no luck .. did a google search for "flat wire torsion spring" & found the above info. It's an off the shelf for somebody .. I'll keep an eye out !!!

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Permalink Reply by D ale on December 12, 2010 at 1:03

Daniel Howland said: "I wonder where these can be purchased...."

.. these folks are really close but the cross section looks square .. they "advertise" replacements for Kershaw ..

http://www.assistedknife.com/index.cfm/fa/items.main/parentcat/2609...

The spring you show .. that cross section wound the way it is .. more torque than round or sq ..

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Permalink Reply by Cesar Salazar on December 12, 2010 at 15:30

Great inside view of the mechanism and spring! Thanks for posting!

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