Japanese Naga Sawa door lock

[Comrade627]

Found this fella and figured it was a regular ol' pick job. Apparently was wrong when after 20 minutes it wasn't open. Not much else to say other than driver pins I've never encountered, and key pins that look like graphite. They look mushroom-ish, have a look for yourself. I suspect that they're upside down in the pins picture, but I'm honestly not sure.

Edit: it's a 6 pin lock but you know, mobile cameras and forums often disagree.

[KPick]

Nice. I've never seen such pins inside of a lock, but I do say they do qualify as a mushroom pin. Very nice lock. I'd like to take a crack at it. Whered you get it? So I can get myself one for my collection of le bucket of lokz

[GWiens2001]

Definitely upside down. That must have be a breeze to open if you briskly rake it. They do look upside down.

Wonder how it would pick if you swapped the key pins and driver pins. Be easy to over-set them.

Gordon

[Comrade627]

I got it at a hardware place in Japan called "makeman". Probably hard to come by.

I dont think the pins were upside down in the lock. There was a rapid unplanned disassembly so I didn't get to study them before they were all over the place. Swapping key and driver pins as in pudtting the drivers in the key pin place? That's a thing?

I plan to key this out starting with 2 pins to learn how these fellas operate.

[deolslyfox]

Interesting pins .... Mushroom ?? T-pin ?? T-room ?? Never seen those before, but then I don't see many Japanese locks ...

Thanks for sharing !!

[cheerIO]

That thing looks cool.

I think Gordon means that the orientation of the driver pins to the key pins are upside down. Flip the driver pins over. If the tapers were at the bottom and you had the "rounded" key pins the lock would just fall into the shearline with a rake or a zip.

Also in the present orientation, it wouldn't give the mushroom portion of the pins to do their job. I think that the "cones" on the top of the driver pins are supposed to nestle into the springs kind of like schlage T pins.

[GWiens2001]

That thing looks cool.

I think Gordon means that the orientation of the driver pins to the key pins are upside down. Flip the driver pins over. If the tapers were at the bottom and you had the "rounded" key pins the lock would just fall into the shearline with a rake or a zip.

Also in the present orientation, it wouldn't give the mushroom portion of the pins to do their job. I think that the "cones" on the top of the driver pins are supposed to nestle into the springs kind of like schlage T pins.

Couldn't have said it better myself, cheerio.

Gordon

[smokingman]

I agree, those "cones" should be for keeping the springs aligned.
Even with the mushroom/barrel pins, the fact that they are so nicely rounded
at the shear line should make this one pretty easy once you determine the feel
difference between false set and sheer(sharp edge/counter rotation VS smooth transition).

[deralian]

I was just going to say the same thing. Rounded edges on the pins defeats the security they are going for. Much easier to pick rounded pins than flat ones.

[Comrade627]

I put it all back together the correct way and man, those pins plus the keyway make for a tough pick. Still not open.

[cheerIO]

Are you levering of the left hand warding to pick it?

Do you have any thin (0.015) picks? You may be able to use TOK tension and have the whole keyway to work with if the pick is thin enough.

That is a cool lock. Also do you have a Tokyu Hands by you? That is my favorite store in the world. Their hardware/tool section is sweet too.