SAK Mods! Post your pics, questions and ideas

I think I might know now.

You used one of your recently arrived tools and the pin is reusable, but not full length. Nothing is clipped, as that would result in an even shorter pin length. But in a 5 layer knife a lot of it can be reused. The method could be done in a Spartan or even a single layer, but not really have any reusable pin. Bushings are untouched.

There are cases when a back pin can be done this way too. I think that was my issue in guessing what you did!

Edit: Some end pins can be done this way too. Lots of 111mm and pliers.
No, those bits haven't been taken out of their packaging yet. I'm in a bit of a lull at the moment because I'm still waiting on some parts donor SAKs to arrive. There are some 2.5mm rods on the way too. The 5 layer Ranger is going to be 6 layers when it's done. There are also some 1.5mm rods on the way for the 58mm SAKs that I want to do.

What do you think? Should I keep this going or just explain it already? How about another day? 24 hours? I think that's fair.
 
I’ve been working on my tooling for 3mm rivet ‘no-drill’ removal in 111mm frames today and yesterday. Got more of the OHO slide-lock projects to get to now that I have the parts loose.
So…one of the last things I need to decide is wether to use a kinda rare slide lock stainless metal saw donor Workchamp or an older case hardened version.
 
I meant the 5/64” one.
I've had that old thing for ages.

Besides, this is a no-drill method, remember? Even if it's done by hand with a screwdriver, I still consider using a drill bit as drilling.
Up to you on giving up the solution. I’m always game for riddles and puzzles. Lol.
I'm worried that other people might be finding this annoying. If it isn't getting old already, eventually it will.

I will describe both variations of the method that I found no sooner than 24 hours from the time stamp of my previous post (if nobody has figured it out by then).
 
I've had that old thing for ages.

Besides, this is a no-drill method, remember? Even if it's done by hand with a screwdriver, I still consider using a drill bit as drilling.
I guess I forgot the original parameters mentioned.

Did this anyway…because still many ways to skin the cat:

52328240676_9d6098b0e8_w.jpg


52328486638_8898ef15e8_w.jpg
 
Guy's(?) Disassembly Method

As a quick refresher, these were the criteria:

-removes the pin without drilling or cutting it
-preserves nearly the entire length of the pin all the way up to the rivet
-has a guaranteed 100% success rate to save the bushing
-does not require destroying the SAK parts (ie: the liners, sideplates, springs, spacers, and tools) to accomplish
-does not involve sawing between the layers
-always works regardless of which layers are present
-only works on the center pin; does not apply to the outside pivots or the back tools pivot

It looks like nobody else knows this method and nobody else figured it out in time based on the criteria that were given. Maybe that means it's my own method? So then, here is the description for how to accomplish both variations of it.


Variant 1: the pinch approach, moderate difficulty

1. Start by filing down the rivet on one side of the back tools pivot and then drive that pivot out with a punch or a small nail. This pivot has no bushings, so we don't need to worry about saving them. You can drill this pivot out if you really want to, but why risk damaging the sideplate?

2. With the back tools pivot gone, you can either push or rotate out the springs. You may also want to open the tools from the two outside layers to get them out of the way. Typically the outside layers are the knife layer and the bottle/can opener layer, but it doesn't matter just as long as you make sure that their tools aren't in the way.

3. Now pinch the aluminum sideplates so that they bow inwards. This will not damage the sideplates; they won't stay permanently bent unless you inexplicably decide to use enough force to crush the SAK for some reason.

4. Pinching the sideplates will free the center pin to move up or down, which allows you to move one of the bushings away from its pin head.

5. With the bushing out of the way, you can now file around the edges of the pin head until its diameter is small enough for the bushing to slide past it, thus freeing the entire pin. Alternatively, you can simply file the whole pin head off. It's quicker and easier, but it will preserve slightly less of the total pin length.


Variant 2: the last pin approach, easy level


1. Save the center pin's removal for last. With all 3 of the tool pivots gone, the only remaining parts still attached will be the sideplates and the liners, with the center pin holding them together.

2. Push the sideplates and liners over to one end of the pin so that they all rest on top of each other like a stack of pancakes. The opposite end of the pin is now completely free for you to work on.

3. On the free side of the pin, move the bushing away from the pin head. You can now file around the edges of the pin head until its diameter is small enough for the bushing to slide past it, thus freeing the entire pin.


And it's that simple! I have to say that I'm really surprised nobody else thought of this.

So in my opinion, here's the most significant thing about this method of SAK disassembly: it allows you to avoid having to drill out both of the small pins, which makes causing damage to either the sideplate or the bushings incredibly unlikely, since the other two pins happen to also be the largest ones. The larger size of those two pivots makes them a lot easier to drill without causing damage to anything else.

Well, at least that's true on a 91mm SAK... On an 84mm SAK, all of the pins are the same size! But this disassembly method will still let you remove up to half of the pins without drilling, which still effectively decreases your odds of making a mistake. The fewer pins you have to drill, the lower your chances are of messing something up.


Have a great weekend, everyone! Stay healthy and stay safe! 👋;)
 
I should have been able to guess the ‘last pin’ method, but I only actually use it on broken/cracked liner knives. When I do that, I use a loss-less unriveting to release it (with hammer or other tooling). So I don’t really consider it a process for every knife, though certainly possible.

Your pinch method, does sound unique, creative, resourceful and original. 👍 I’d unfortunately also call it unadvisable for how easy it is to permanently deform aluminum. When you reassemble a knife like that, you might reconsider depending how it operates.
 
Guy's(?) Disassembly Method

As a quick refresher, these were the criteria:

-removes the pin without drilling or cutting it
-preserves nearly the entire length of the pin all the way up to the rivet
-has a guaranteed 100% success rate to save the bushing
-does not require destroying the SAK parts (ie: the liners, sideplates, springs, spacers, and tools) to accomplish
-does not involve sawing between the layers
-always works regardless of which layers are present
-only works on the center pin; does not apply to the outside pivots or the back tools pivot

It looks like nobody else knows this method and nobody else figured it out in time based on the criteria that were given. Maybe that means it's my own method? So then, here is the description for how to accomplish both variations of it.


Variant 1: the pinch approach, moderate difficulty

1. Start by filing down the rivet on one side of the back tools pivot and then drive that pivot out with a punch or a small nail. This pivot has no bushings, so we don't need to worry about saving them. You can drill this pivot out if you really want to, but why risk damaging the sideplate?

2. With the back tools pivot gone, you can either push or rotate out the springs. You may also want to open the tools from the two outside layers to get them out of the way. Typically the outside layers are the knife layer and the bottle/can opener layer, but it doesn't matter just as long as you make sure that their tools aren't in the way.

3. Now pinch the aluminum sideplates so that they bow inwards. This will not damage the sideplates; they won't stay permanently bent unless you inexplicably decide to use enough force to crush the SAK for some reason.

4. Pinching the sideplates will free the center pin to move up or down, which allows you to move one of the bushings away from its pin head.

5. With the bushing out of the way, you can now file around the edges of the pin head until its diameter is small enough for the bushing to slide past it, thus freeing the entire pin. Alternatively, you can simply file the whole pin head off. It's quicker and easier, but it will preserve slightly less of the total pin length.


Variant 2: the last pin approach, easy level

1. Save the center pin's removal for last. With all 3 of the tool pivots gone, the only remaining parts still attached will be the sideplates and the liners, with the center pin holding them together.

2. Push the sideplates and liners over to one end of the pin so that they all rest on top of each other like a stack of pancakes. The opposite end of the pin is now completely free for you to work on.

3. On the free side of the pin, move the bushing away from the pin head. You can now file around the edges of the pin head until its diameter is small enough for the bushing to slide past it, thus freeing the entire pin.


And it's that simple! I have to say that I'm really surprised nobody else thought of this.

So in my opinion, here's the most significant thing about this method of SAK disassembly: it allows you to avoid having to drill out both of the small pins, which makes causing damage to either the sideplate or the bushings incredibly unlikely, since the other two pins happen to also be the largest ones. The larger size of those two pivots makes them a lot easier to drill without causing damage to anything else.

Well, at least that's true on a 91mm SAK... On an 84mm SAK, all of the pins are the same size! But this disassembly method will still let you remove up to half of the pins without drilling, which still effectively decreases your odds of making a mistake. The fewer pins you have to drill, the lower your chances are of messing something up.


Have a great weekend, everyone! Stay healthy and stay safe! 👋;)
It´s always interesting to hear how things are done, and what can be done. But I don´t understand how all the work of saving a pin is worth the effort? Saving the bushing i understand, but why not just peen a new in the old bushing?
 
Next project in the making...
85mm Sportsman. I have a 85mm Tourist incoming that I will work on after this one. They are basicly identical except the penblade on the Tourist is a file on the Sportsman. I am going with nickel silver bolsters and amber bone scales, brass liners and pins on the Sportsman, making it in the style of a vintage gentlemans/soldier knife. To the Tourist I have some 3mm Vulcanfiber sheats that I am curious to maybe use. I have never worked in Vulcanfiber in that way before (only with 0,5mm between pieces), so I hope it finishes nicely. Maybe I will keep the aluminum liners on that one and only put brass pins...
 
I don´t understand how all the work of saving a pin is worth the effort? Saving the bushing i understand, but why not just peen a new in the old bushing?
I don't understand why you would throw away perfectly good 2.2mm brass rod when it's not exactly an easy thing to acquire here in the states. I hear it's easy to find If you're in Europe, but I have to buy 3/32" rod and sand it down until it fits. Decent American made 3/32" brass rod costs more, too. At least I haven't found a cheap source.

Waste not, want not.
 
I don't understand why you would throw away perfectly good 2.2mm brass rod when it's not exactly an easy thing to acquire here in the states. I hear it's easy to find If you're in Europe, but I have to buy 3/32" rod and sand it down until it fits. Decent American made 3/32" brass rod costs more, too. At least I haven't found a cheap source.

Waste not, want not.
That explains it :) Here in Sweden (Europe) I can buy brass nails in the right size for $1 /25 nails
 
It´s always interesting to hear how things are done, and what can be done. But I don´t understand how all the work of saving a pin is worth the effort?
For me, the effort is mostly worth it for vintage knives…especially ones with original nickel silver pins. It’s also time saving compared to turning my own from 3/32”.
 
Does any one have some special tools or trix when putting the knife together after reassembling it? Do you start and finish attaching everyting in a special order?
 
Does any one have some special tools or trix when putting the knife together after reassembling it?
Main thing I do is use a lever or the tool itself to bend the backspring. Posted about that earlier in this thread. There’s some other examples I wanted to put in a separate thread.

Do you start and finish attaching everyting in a special order?
Generally, I assemble in the order that the factory does. Front (awl and openers) first to back (blade layer) last.



Didn’t have a lot of knife time today, but finally did all the trimming and fitting for another OHO slide lock (Workchamp). Modded the lock mechanism to be as tight as possible to eliminate the stock lock-rock. Force to unlock would probably bother some if not most people, but I’m going to finish assembling it like this after I get everything else polished for the knife.
Operation of the main blade is pretty slick so far.
 
I'm thinking of putting either a DeWalt DWA4974 hex bit or DeWalt DWA4975 hex bit into a regular hand held 1/4" hex bit screwdriver and using it to sand off the rivets on a 91mm SAK while preserving the bushings. These are aluminum oxide grinding bits so they should work on brass.
I went ahead and ordered both grinding bits. They were on sale so I got them even cheaper than they normally are. I also picked up an inexpensive set of 1/4 hex drill bits in a range of sizes starting at 1/16th of an inch and increasing from there.
The alox bits didn't pan out. They work fine on brass but they are too fat.

The regular drill bits unsurprisingly work great. It also makes a big difference actually using a fresh new bit instead of the old corroded one I've been using... Having different sizes helps too. With a 5/64" bit you can do everything from taking apart an alox minichamp to taking apart a 91mm SAK, but it's obviously better to actually use different sizes for different pins.

I should have been able to guess the ‘last pin’ method, but I only actually use it on broken/cracked liner knives. When I do that, I use a loss-less unriveting to release it (with hammer or other tooling). So I don’t really consider it a process for every knife, though certainly possible.

I think it's the only disassembly method that makes sense if you're being practical or even just lazy, because it makes the center pin super easy to remove while maximizing the total length you can preserve, and it completely eliminates the risk of damage to the bushing.

I just did this on an old Explorer. In my opinion, everyone should be doing disassembly this way unless saving time is the primary concern. If time is the issue, then lining up the rivet in a drill press is obviously going to be much faster, but in that case you are still risking damage to the bushing and possibly the sideplate. I've heard it said that even if you are well practiced, you will still end up destroying the odd bushing when drilling the rivet. Since these bushings can't really be purchased anywhere that I'm aware of, it makes sense to take all possible measures to avoid losing them.
 
I think it's the only disassembly method that makes sense if you're being practical or even just lazy, because it makes the center pin super easy to remove while maximizing the total length you can preserve, and it completely eliminates the risk of damage to the bushing.

I just did this on an old Explorer. In my opinion, everyone should be doing disassembly this way unless saving time is the primary concern. If time is the issue, then lining up the rivet in a drill press is obviously going to be much faster, but in that case you are still risking damage to the bushing and possibly the sideplate. I've heard it said that even if you are well practiced, you will still end up destroying the odd bushing when drilling the rivet. Since these bushings can't really be purchased anywhere that I'm aware of, it makes sense to take all possible measures to avoid losing them.
I’m coming around to think more like this. Even when speed is a primary consideration, un-riveting is outright faster for me. Why not save 100% of the whole pin instead of just 100% of the length.

I’d gladly call it ‘Guy’s 4th pin removal protocol’. 😀👍
 
The regular drill bits unsurprisingly work great. It also makes a big difference actually using a fresh new bit instead of the old corroded one I've been using... Having different sizes helps too. With a 5/64" bit you can do everything from taking apart an alox minichamp to taking apart a 91mm SAK, but it's obviously better to actually use different sizes for different pins.
Sharpen that sucker and put it back to use! If you’re using it for hand work anyway, symmetry doesn’t matter as much. A fine diamond hone can make it cut better than new.
 
Does any one have some special tools or trix when putting the knife together after reassembling it? Do you start and finish attaching everyting in a special order?
When I reassemble a 91mm SAK, I start with the can opener side scale on the bottom and stack up from there; the bIade side comes last. I do this because the can opener side of the knife will sit flat on a pounding surface, but the corkscrew/Philips prevents the blade side from sitting flat.
 
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