New magnet for the T-Mag

[Murdoc]

Hi folks!

A friend of mine in the U.S. took the measurements of the original magnet of the T-Mag:

12 x 6 x 3,5 mm which would be close to 1/2" x 1/4" x 1/8"

if that is correct, it seems this one from kjmagnetics would fit nicely:

http://www.kjmagnetics.com/proddetail.asp?prod=B842-N52

The Deacon measured 1/4" X 1/4" X 1/2", so I am quite confused. [EDIT: that's correct, I measured mine as soon as I got em). If this is right, then two of these would be just PERFECT:

http://www.kjmagnetics.com/proddetail.asp?prod=B444-N52

...and much better than 2 of the first mentioned B842's because of the polarity.


Since I live in Germany, it is not as easy as for you to get them, but I hope to acquire some of them eventually. But the esteemed members that live in the US could give this one a try for next to no money at all :D , and since this magnet has a pull force of no less than 12.05 lbs :eek: , I think this will lead to a significant improvement over the original one (although I don't know the strength of than one until I get my own T-Mags).

The "problems" (or better "side effects") caused by a magnet of that strentgh shouldn't be much worse than with the original one anyway, but the advantage of a stronger "lock" should be evident.

Who's gonna be first and try this?

spydercofanatic seems to have ordered some of them, but no report from him so far.

Dennis

[jzmtl]

Hi folks!


The Deacon measured 1/4" X 1/4" X 1/2", so I am quite confused. If this is right, then two of these would be just PERFECT:
Dennis

This is the correct measurement. The magnet extends into cutouts in the titanium liners so it's bigger than what you can see.

However I suspect to make it worthwhile you'll need to add second magnet inside the blade.

[spydercofanatic]

DO NOT TRY THE FIRST KIND OF MAGNET I just bought 2 of them and like jzmtl said was right. I will try the small square ones Thursday and if anybody wants to buy the 1st kind I will send them mine lol

[Murdoc]

The 1/4" cubes do have the advantage that if you combine two of them, the poles are at the exact right spot: where the magnets meet the blade.

One posting of The Deacon seemed to indicate that the original magnet isn't magnetized that way but perpendicular to it.

That would explain why it doesn't work as good as the magnet's strength would suggest.


Dennis

[Gibsoniam]

I must resist the urge to follow this thread! :D

If this magnet upgrade works I will be even more disappointed that I was not able to grab one of the T-Mags for $50 before they were gone.

Anyone buy one T-Mag too many and need to unload it? :p

[spydercofanatic]

Got 2 cube magnets on the way just ordered them today so everybody CROSS YOUR FINGERS!!!!!!!!!!!!!!!!! :D

[jzmtl]

Looking forward to your results, t-mag would be an awsome knife if the magnet holds stronger.

[spydercofanatic]

Heres a pic for all you T-Mag people The Deacon posted a pic of a T-Mag holding 9 pennys with the 10th one closeing the blade B U T after I put in the new N52 Magnets... well yall tell me what ya think oh and yes thats a Cold Steel American Lawman weighing 5.4 oz hope yall enjoy

[jzmtl]

Could you try to press the tip of blade while open against a scale and see at what force does the new/old magnet release the blade?

Also did you have the new magent pole facing pivot or thumb hole? I think the old one is facing pivot.

[spydercofanatic]

dont have a scale but I think the poles are facing thumb hole and yes the old mag is facing the side

[Murdoc]

So Spydercofanatic... this is with the two cube magnets, you say?

Do you think that they are an improvement over the original magnet worth to replace it with these new ones? If yes, I might order some of them! In fact, the original magnet seems to be quite weak compared to the N48 Magnets I purchased from a german/swiss dealer. I am quite confident that the two 1/4" N52 cube magnets would be significantly stronger.


Anyway, here's some pics of my brand spanking new T-Mag.... immediately disassembeld after I got it

The "inside" of the CF slabs are actually very nicely polished (not obvious in the pics, but my CF Caly is less polished than that). It reminds me of pics from the old "glossy" CF Delica!











Why I did that? Because I wanted to polish up the quite "raw" Titanium liners a little so the inside of the knife would look nicer :D out came the Dremel and some polish paste. I didn't polish it enough to buff out the scratches, but I didn't want to thin down the liners, plus to be honest I just didn't have the time and the equipment today.... this is the result of 15 mins of buffing work (sorry, pics are bad because of fading daylight, but you get the idea):

before/after I:


before/after II:


Dennis

[spydercofanatic]

yes Murdoc they are MORE than worth the $7 to put in Like I said in my post The Deacon had a pic of 9 pennys on the blade with the 10th being the one that closed the blade and now mine holds up my American Lawman LOL!!!!!!! and I also have a nice cut across my finger where she SLAMED shut on me :rolleyes: I promise you that you wont regret it. If you do I will buy the magnets from you so you can get your money back THATS how sure I am

[Marion David Poff]

Cool.

So, it is stronger with the new magnets...

How is the action, stronger but still smooth?

And how, exactly, do we procure the right magnets?

[DWRW]

Why two 1/4" cubes
vs.

1 @ 1/4" x 1/4" x 1/2" ???

I have been browsing the K&J Magnetics website trying to figure out the best option.

Apparently N52 grade magnets are much stronger than N42 magnets.

Does the magnetic force double when two cubes are added together? Or some other lesser factor?

I assume you used model "B444-N52" magnets (????)
1 @ 1/4" cube N52 grade magnet has a Pull Force: 5.70 lbs

http://www.kjmagnetics.com/proddetail.a ... B444%2DN52


The size needed is like the model "B448" See: http://www.kjmagnetics.com/proddetail.asp?prod=B448


But, one of those only has a Pull Force: 4.91 lbs

For some reason, they don't offer the right size in the N52 grade magnet :confused:

Has anyone asked K&J Magnetics specifically if the required size can be had even if not listed?


---------

Another option: for some reason the B842-N52
with Dimensions: 1/2" x 1/4" x 1/8" thick

has a Pull Force: 12.05 lbs (* More than twice that of the 1/4" cubes)

See: http://www.kjmagnetics.com/proddetail.a ... B842%2DN52

Why not use two stacked B842-N52 magnets to equal the needed dimensions and more than twice the magnetic force of the two cubes?

How do you calculate the combined force of two magnets???

How is the direction of placement and polarity a factor?

.

[jzmtl]

The reason you need cube is with them you can point the pole towards the thumb hole instead of pivot, this will offer better leverage against closing force.

[DWRW]

Also, if changing out these magnets with magnets that are (?????) many times stronger, while the stronger magnets should "help" hold the blade for use/function, what is the blade like when opening and closing???

Seems like it might get violently snappy - especially when pushing to close and possibly not very easy to flick open (????) :confused:

More feedback and detail about the opening and closing action would be appreciated.

.

[buckthorn]

Has anyone actually had time to install a different magnet and/or install the force-directing backing strips? I suggested the latter but subsequently realized I hadn't taken polarity into account. It's possible that the force directing- application remains valid but only one of the two strips would have any effect and it would be necessary only to incorporate that one.

[fredswartz]

My problem with the knife is that I think the magnet's surface on the back strap side needs some sort of "keeper" or cap to shunt the magnetic pull there. Unless I carry it in a belt pouch I drag metallic objects from my pocket along with the knife. If it weren't for the nuisance of keeping this knife away from other metallic objects it would be one of my favorites. It's still a keeper for me as I think it is one of those knives that will eventually be sought after due to it's quality and uniqueness.

[Manix Guy 2]

Anyone who have replaced the magnets on the T Mag have any comments of long term use after conversion ? Your thoughts would be appreciated . MG2

[Fredo]

Hey Guys,

I did the magnet mod on my T-mag same as spydercofanatic and it is a nice improvement over the stock magnet. I used the two n52 cube magnets from K&J Magnetics (2X B444-N52). I also tried two of the B842-n52 plate shaped magnets having the same dimensions when stacked together and they didn't seem to work as well. With the two cube mags in place the blade closes at about 6 oz. of force when pushed against a postage scale. The blade has a very nice snap to it on opening and no wiggle when the blade holding screws are adjusted to center the blade The knife flips open easily as well.