bm handle flex

Joined
Apr 5, 2004
Messages
46
Greetings,

We all know the advantages of G-10, (lighter, nonmarring, no anodizing to wear, etc.) Some prefer aluminum or other metal scales for the heft and added strength. I never gave it much thought and lean towards G-10.

I have been conducting an experiment. I received a new bm735. Noticed a slight off center in the blade tip while folded. The blade is straight. Squeezed the handle and the blade tip moved all the way over to the other side. Applied slight stress to the handle and centered the blade perfectly. Opened and closed smoother. I then opened the blade and applied slight sideways stress to the blade edge, slightly more than I would while sharpening. Again the blade tip was misaligned in the handle. With the knife closed, it is very easy to flex the handle to the point the blade touches the steel liner. When the handle is flexed, the steel liners keep the flexed shape, resulting in a misaligned blade.

I also conducted this test with a 710sbt. I observed it was even easier to flex the handle and off center the blade (due to the longer handle and blade length). The skeletonized liners easily bend and keep their stressed shape, while the G-10 has no memory and goes along for the ride.

I will add that both the Ares and the 710 tested showed a little daylight between the G-10 scale and the steel liner on one side of the handle at the blade pivot end. There are no handle screws at this end and the pivot screw is the only thing holding the two together.

Tested also a bm910 Stryker. This knife has solid titanium liners. It would only slightly flex when pressured and returned to center.

My little bm722 with solid G-10 handles, a solid back, and steel inserts.....took considerable pressure to note tip movement and returned to dead center when released. Same for my bm 551 Grip.....solid and sturdy, little flex and return to center.

I suspect the 805 and 806 may stress and hold the stressed shape as well. I have not tried it with these models.

So, alas, this may be another consideration for hard users out there. Aluminum may scuff and scratch if dropped, but the 520 and 720 ain't gonna bend easy.

I always felt that a knife with full steel liners and G-10 slabs on top would be tougher than all G-10 or aluminum. My little experiment may indicate otherwise.

If you folks have free time, do the little flex test with your Ares, 710, 805, or 806. See what happens.

Thanks,
 
Don´t have to..

I gave my 806 to a knifemaker for a 806-type blade made from RWL34. As i get it back i had a little talk with him and he told me, the blade is straight. But the liners were bend, so he bend them back, so the blade is now fairly centered.
 
artsig1,

Simply closed the knife, looked down into the blade channel, and used my thumbs and index fingers to easily flex the knives. After flexing, the bend remains. Doesn't take much pressure at all.

bomtek44
 
Well, has anyone performed this test and been a bit surprised at how easy it is to bend the handle of the G-10 over steel handles?

I know I was.

thanks,

bomtek44
 
Wow, I'm glad I read this. My 806D2 was off center and I thought the blade was ground slightly crooked. But the blade always looked straight when it was open... Well, I tried the flex test and by jiminy it's centered now.
 
NGK,

Yes. The handle bows or flexes, putting the blade off center. When I release the handle of the ones I have tested, the bend remains, leaving the blade off center in the channel. It can be bent the opposite way to restraighten, but use of the knife with any side pressure puts the blade back off center. I was just wondering if anyone else had observed this in the steel liner/G-10 handled knives, especially the skeletonized liners such as the Ares and 710 models. Try it. You may be surprised.

Thanks,

bomtek44
 
torz,

You may be happy now.....but use the knife some, cut branches, rope, cardboard, or whatever takes some leverage.....and you will probably see the blade is off center again.

Not to be negative. I like G-10 for its wear and ability to resist scratching if dropped.....however it seems that there may be advantages to aluminum scales. Sort of got me leaning toward a 520 now.

Thanks,

bomtek44
 
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