Fine Tune Your Leek [How-To with Pictures]

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Feb 20, 2005
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I'm a real big fan of the Kershaw Leek. I have been since I picked up my first one at Elmendorf Air Base outside North Pole Alaska. At the time, I didn't know about the speed safe mechanism. In fact, I didn't know about it until I saw a newspaper article debating wether they were considered automatics or not. You see, I had gotten one of the one-in-a-thousand that was a little sticky. It was a small matter to loosen the pivot screw a wee bit, and I've been enthrawled ever since.

This article is intended to help you get the most out of your Kershaw Leek, and all your other Kershaw Speed Safe knives as well. As many regulars of these forums may already know, I have been advocating an S30V/G10 Leek for some time. My dream was recently been realized in the form of a package from KnifeCenter.com. I was un-neccessarily terrified that the sprint run of polished handle Leeks would pass me by here in the desert.

As with all the Leeks, Scallions and Chives I own (7 all combined), the first order of business was to squeeze an extra 4%-5% of performance out of the speed safe mechanism. I havn't done this with my Bumps, but I would imagine the same principals apply.

DISCLAIMER: This project is of moderate difficulty, and should not be undertaken by anyone who fears they might never get their beloved leek back in working order! Kershaw is incredible with their generosity when it comes to repairs and replacement parts, but you can't expect them to clean up any mess you might make by attemting these modifications!

A couple of notes on safety. The first thing I do when I start adjusting or modifiying a knife is put some duct tape on the leading edge of the blade. This ensures that I don't make any unintentional modifications to the geography of my hands and fingers. I've left the tape off in some of the picture for asthetic reason.

The materials and tools you will need for this project are a #6 and #8 Torx driver [image 1], light oil (I use sentry solutions tough glide), a stiff polishing substrate with some manner of super fine abrasive, blue Lock-tite® and some que-tips or pipe cleaners.

Before you begine the disassembly of your Leek, you will want to release the blade to the neutral position [image 2]. Under no cirucmstance do you want to disassemble you Leek with the blade closed. You can do it with the blade all the way locked open, but I recommend neutral, as the torsion bar is completly disengaged in this position.

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Begin by completly loosening the spacer screws with your #6 Torx driver [image 3]. With the G10 Leek, it was kinda nice that the screws stayed stuck to the space, since getting all that lined up for re-assembly can be touchy.

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Next, grab your #8 Torx driver and loosen the pivot screw. You will note a fair amount of resistance, as it is held fast with lock-tite® [image 5]. This makes a strong argument against just loosening the pivot screw, as this will break the lock-tite®, and reduce its effectiveness. Once you have the pivot screw out, you can disassemble your Leek [image 6]

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The first perfomance enhancing step we are going to take is to polish the washers. I use 3 micron diamond polishing paste spread on a stiff piece of stropping leather mounted on a 1/2" slab of UHDP. You can also use chromium-oxide polishing compound, or even 4000 grit wet/dry sand paper. What ever you use, make sure it is not soft or flexible. Rub away untill the washers are nice and shinny [image 7]. be sure to keep the polish even. I never use power tools like dremels for this because of the risk of making a washer "not flat". Also, take care not to round the edges of the washers. That's why you don't want to use a surface that is too soft or spongy. I was unable to capture a picture of a nice shinny washer, as the autofocus on my camera insisted on focusing on its own reflection, instead of the washer [image 8].

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You'll next want to give the root of the blade the same treatment. The DLC coated blades handle this step beautifully. The S30V blade... not so much. The intent here is to get rid of any manufacturing imperfections, and achive just a light polish. For the pivot hole on the blade, I use a cue-tip dipped in some chromium oxide powder. Give this only a minimum of swipes. The last thing you want here is to elongate the pivot hole. Once again, you're just looking to give a light polish. Not so much that you create any run-out on pivot hole.

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Give some of the same treatment to the post and both liners where they contact the washers [image 11]. If you like, you can remove the pocket clip and post to make an easier job of it. I avoid this, though, as the post is seated pretty snug, and I fear that it may not perfectly re-align during re-assembly. If this post if off just a tiny fraction of one degree, the tip of your blade will be off center by a mile. Take a moment to ensure the Torsion bar cut-out is free of oil, debris, and dust [image 12]. If you over oil your Leek, this is where the oil will pool up. This will lead to lint, dust collection and debris, and sub-standard performance. The SS leeks I have looked at come with a white grease here. The G10 and aluminum handles leeks seem to come dry.

leek11.jpg
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Now it's time for re-assembly. As you begin to build your "knife sandwich", place just a drop of oil between each layer, only where the washers make contact with the blade or liner [image 13]. These are the only points of friction. Getting oil anywhere else just invites unneccessary dirt and dust. Enough oil will make its way to the point where the pivot hole and post make contact. You can put one little drop here as well if you like. Image 14 depicts what the stack should look like. Note that the small washer is on the torsion bar side of the blade which would be the top of image 14.

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If you aren't attentive, and allow a bit a debris to get between the washers and the blade or liners [image 15], the whole operation will bind up, and you knife won't work for crap. If you got too aggresive while polishing the washers and rounded the edges, you will also have problems with grit and debris getting under the washers [image 16].

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The pivot screw should be the last thing you re-assemble. Drop a dab of blue lock-tite® into the hole and tighten the screw down snug [image 17]. Avoid the red and green lock-tite® as they require heat to break. You now have a limited amount of time to make your final adjustments while the lock-tite® sets. Try to flick the blade open. Chances are it will be fairly tight. Back the screw off in 1/16° or less increments until the blade almost works as fast as you want it too. If you leave it at just-about-right, after a few days of use, everything will settle in nicely, and it will be just-right. One final thing to check before the lock-tite® sets up. You want to ensure that the blade is close to center between the scales [image 18]. If you leave the pivot screw too loose, the pressure from the torsion bar will press the blade up against the torsion bar side liner. In extreme cases, the blade will drag on the liner while opening and closing. Almost all of blades on my Leeks lean a wee bit towards the torsion bar side liner, but none of them drag

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That's the whole deal. All the Kershaw Speed Safe knives work super as they are, but these tweaks give it a slight little something that make them even snappier. Be careful with the oil, too. Excesive oil can really drag your knife down.

Thomas W. and Tim G: If there's anything I've forgoten here, or if I've broken a golden rule of some sort, please don't hesitate to set things straight. I have pretty thick skin.

Enjoy!
 
Excellent post, but don't forget to consider that removing even the slightest bit of material in the pivot area can loosen tolerances. Don't go nuts and all should be well though.
 
Great stuff jemelby. You've taken the mystery out of this. I've got several Leeks, but didn't want to risk the *SPROING* :eek: syndrome on my knives! Now I'm going for it!:D
 
Outstanding tutorial, pictures and directions make me think that even I, the only human with 10 thumbs, can do this. thanks again and do more posts. ahgar
 
Yes do more posts!! You have a valuable skill set, knife tinkerer and communicator!
 
Great pictures, very clear layout. What program did you use to put together the diagrams and annotations?
 
Jemelby this is one of the best posts I've read in awhile.Informative,great pictures,and put in a way so it does'nt take a PHD to understand.It seems you have a lot to offer us knife knuts.I'll be looking foward to your next post.:thumbup:
 
Jemelby,

One of the best posts I've read -- thank you for taking the time to show us your tips.

Can I ask a naive question? In picture #13, where can I find an oil applicator tip that narrow? I havn't been able to find a tip small enough to apply to knives without dripping oil all over the handle and blade!

Thank you! :)
 
Harry White said:
Can I ask a naive question? In picture #13, where can I find an oil applicator tip that narrow? I havn't been able to find a tip small enough to apply to knives without dripping oil all over the handle and blade!

The applicator you see in that particular picture is a syringe. But I also use sentry solutions tuff-glide. The 1/4 oz and 1 oz bottles come with a very nice fine steel needle type aplicator. Very handy. The 1/4 oz applicator only comes in their zipper pouch knife care kit, but they also had boxes of them at Blade 2005, and were selling them for a buck. I grabbed up several. It is a very nice to have one in every desk drawer. The small applicators can be re-filled from their more economical larger size containers.

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Don't over do the pivot. I had a friend using coarse sandpaper on the liners..MASSIVE blade wobble
 
So I went to try this on my Leek, mainly to get access to the inside to clean out grit and lint, and all went well untill I got to the loosten the pivot screw part.

It offered quite some resistance, and then slowly started to turn, still with decent resistance, and will continue to turn as many times as I want, without coming out any. By looking at the back of the knife, with the pocket clip removed, I could see that when I was turning it the pin the screw is loctited to is turning along with the screw...Yet there is no way I can see to grab hold of the pin to get it to stop turning so that I can break the loctite. Any ideas?
 
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