How long does yr framelock take to wear out till blade play occurs?

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nilfire77

Joined
Jan 16, 2012
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My 755 MPR started out with a 30% lock up. After a couple weeks it wears in to 50%. At the rate that the lock's wearing, i'm kinda worried that vertical blade play may happen sooner than expected.

So guys, whats yr take on this? Especially 755 MPR owners. Any issues so far?
 
I'm not sure how often you carry and use your 755, but I've had mine almost 6 months and it's been right around 45% lockup since the day I got it.
 
Highly dependent on how you use it, and also on how each knife is assembled. As it wears it should slow down the process as the corner of the lock bar wears into a flat spot of greater contact area.
 
Gosh, that's sad to hear. I had my mind set on a 755 MPR. I like the design and M390, along with the shorter blade. I guess I'll write this one off. I want my knives to have solid lockup with no blade-play, like on my Para2 and Manix2 and BM 690.
I guess I don't understand the concept of 30% or 45% LOCKUP.
Please help me out.
 
Sonnydaze said:
Gosh, that's sad to hear. I had my mind set on a 755 MPR. I like the design and M390, along with the shorter blade. I guess I'll write this one off. I want my knives to have solid lockup with no blade-play, like on my Para2 and Manix2 and BM 690.
I guess I don't understand the concept of 30% or 45% LOCKUP.
Please help me out.
Click to expand...
No don't get me wrong, my 755's lockup now is as solid as a tank(absolutely no blade play whatsoever)! In fact, it's one helluva knife and my favorite folder at the moment! If the lock wearing pattern is as what hardheart had described, then it puts my mind at ease knowing that the inclination of the lock when engaged won't increase linearly with time.

Here's a picture of how a 30%(approx) lockup looks like. The percentage of the lockup gets higher as the lock bar sits deeper under the blade tang.

img-zero-tolerance-0550-05.jpg
 
You should have nothing to worry about, what your noticing is the lock face wearing in to its hopefully final resting spot. You should be able to get years of use out of it. Most production knives don't have the Ti heat treated unless your talking about a Sebenza or something of that nature. My Sebbie started out at about 70% and hasn't moved more than .0005 since I've had it but I attribute that to the HT on the lockface. Most of my framelocks wear in so there no worries :thumbup:even on a sebbie theres no worries if it goes to 90% as long as there is no blade play, basically what I think I'm saying is that it doesn't matter what your lockup & is as long as there is no play in any direction. and personally I like a later lockup b/c its safer
 
I really want to like the 755 but, I'm on my second one and it's worse than the first. The first was purchased new and out of the box the lock bar would move all the way inward and had lock rock. I just opted to return it to the shop I purchased it at and went a different direction. Still wanting to like the design I grabbed a used one here and just recieved it yesterday. This one does the same thing but also has blade play unless you tighten the pivot to the point that it is a two handed affair to open.
 
A titanium framelock wears relatively quick at the beginning, but once its been broken in, the lockbar "settles".
 
PropThePolecat said:
A titanium framelock wears relatively quick at the beginning, but once its been broken in, the lockbar "settles".
Click to expand...


I don't agree with what you said about lockbar wear at all! Any quality ti folder priced at $180 and up shouldn't have the lock bar move "realatively quickly at the
the beginning". This statement may be true of cheaper lock bar folders but Not a folder made by one of the top knife manufactures.

Any new member new to folders with a lockbar would be decieved if he believed this info.
I have about 10 folders with a lockbar and none of them has moved At All.
 
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clockman said:
I don't agree with what you said about lockbar wear at all! Any quality ti folder priced at $180 and up shouldn't have the lock bar move "realatively quickly at the
the beginning". This statement may be true of cheaper lock bar folders but Not a folder made by one of the top knife manufactures.

Any new member new to folders with a lockbar shoulder would be decieved if he believed this info.
I have about 10 folders with a lockbar and none of them has moved At All.
Click to expand...

I should have re-phrased my statement, and started the sentence with "MY titanium framelocks..."

My latest purchase, a HEST 2.0, wore down relatively quicky, ie. the lock-bar face smoothed down and mated with the blade, if that makes sense? Id say it moved slightly less than a millimetre than from new over the course of ca. 2 months. Nothing crazy, but i also wrote that the wear was relatively fast.

But bottomline is that Ti is soft, and will wear out with time. Several manufactureres such as ZT, Lionsteel and Spyderco, are adding steel inserts to counter this problem. To tell a newbie that a ti framelock will NEVER move when used regularly, is also to decieve him.
 
nilfire77 said:
Geez.. My 755 MPR is starting to develop lock rock... Will it go away eventually?
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That doesn't sound good. I have never had a Ti framelock (or any framelock for that matter) develop play as it wore in. It either came with play, or never developed it. I think it might be warranty time for you sad to say.
 
Sell it to a Benchmade collector and get one of the well loved Axis folders. I trust them to get the Axis right but not a frame-lock or liner-lock.
 
I've got a 12 year old small Sebenza that gets used several times a day, everyday, and shows no signs of wear on the lockface and no blade play. Maybe my great-grandkids will have to send it to Chris Reeve's great-grandkids for adjustment one day, but I don't think it will happen in my lifetime.
 
My 760 and 755 have had both very "soft" lockbars - unusual compared to other framelocks I have got. It did not create any problems for 755. But I did have a vertical blade play issue with Bob Lum Tanto. So I have taken it apart and bent the lockbar slightly to make the lock-up stronger. That was a bit scary but it solved the problem.
 
I have #73 of the first production run of the 755s and it developed lock rock and vertical play about 3 months after I bought it. That was years ago and it hasn't affected its ability one bit...nor has it gotten any worse.
 
Poez said:
My 760 and 755 have had both very "soft" lockbars - unusual compared to other framelocks I have got. It did not create any problems for 755. But I did have a vertical blade play issue with Bob Lum Tanto. So I have taken it apart and bent the lockbar slightly to make the lock-up stronger. That was a bit scary but it solved the problem.
Click to expand...



This is what you need to do.............but only small bends until you get it where you want it.
 
Also, you may need to adjust the stop pin. BM uses a hexagon shaped stop pin which can be spun to take up blade slack. You have to remove the clip ro get at the screw. I had similar issues with my 755back as well, a couple of trial and errors and it locks up solid.
 
i have a gerber mini paraframe. ive thrown it across my lawn at a tree and had it bounce off, partially closing what once was locked. im not nice to it at all. it has 100 percent lockup with very minimal bladeplay. im quite surprised. the lock bar goes all the way over. no more movement is possible. and theres not much bladeplay
 
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