Mgsecure: additional feature image

2023-02-02T14:13:37Z

additional feature image

← Older revision		Revision as of 14:13, 2 February 2023
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			[[Image:MIWA JN pin axes - MIWA JN four pin axes.png\|right\|thumb\|255px\|MIWA JN four pin axes]]

	The '''JN''' is a [[dimple]] lock made by the Japanese manufacturer [[MIWA]]. Drilled for 21 pins, it is often filled with fewer active pins. Pins are arranged in four rows to the left side of the keyway, the right side and two diagonal rows milled 45 deg. from the bottom of lock.		The '''JN''' is a [[dimple]] lock made by the Japanese manufacturer [[MIWA]]. Drilled for 21 pins, it is often filled with fewer active pins. Pins are arranged in four rows to the left side of the keyway, the right side and two diagonal rows milled 45 deg. from the bottom of lock.

Mgsecure: /* Gallery */ add core side view

2023-01-30T17:34:23Z

Gallery: add core side view

← Older revision		Revision as of 17:34, 30 January 2023
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	File:MIWA JN pin axes - MIWA JN four pin axes.png \| Four pin axes		File:MIWA JN pin axes - MIWA JN four pin axes.png \| Four pin axes
	File:MIWA JN side row pins - FXE48162-Edit-2-Edit.png \| Side row pins		File:MIWA JN side row pins - FXE48162-Edit-2-Edit.png \| Side row pins
			File:MIWA JN core side view - FXE48193.png \| Core, side view
	File:MIWA JN key - FXE48212.png \| Key		File:MIWA JN key - FXE48212.png \| Key
	File:MIWA JN key - FXE48230.png \| Key		File:MIWA JN key - FXE48230.png \| Key
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	<!-- == References == -->		<!-- == References == -->
	<!-- == External links == -->		<!-- == External links == -->

	== See also ==		== See also ==

Mgsecure: New page for MIWA JN

2023-01-30T17:31:26Z

New page for MIWA JN

New page

<span style="font-size: 188%; line-height:190%">{{PAGENAME}}</span>
----
{{Lock model
| name = MIWA JN
| Img = File:MIWA JN front keyway - FXE48203.png
| Img_size = 200
| maker = [[MIWA]]
| lock_type = [[Cylinder]]
| lock_design = [[Pin_tumbler|Pin-tumbler]], [[Dimple]]
| spec_on = true
| spec_comptype = [[Pin_tumbler|Pin-tumbler]]
| spec_comp = up to 21
| ratings =
| patent =
| related =
}}
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The '''JN''' is a [[dimple]] lock made by the Japanese manufacturer [[MIWA]]. Drilled for 21 pins, it is often filled with fewer active pins. Pins are arranged in four rows to the left side of the keyway, the right side and two diagonal rows milled 45 deg. from the bottom of lock.

== Principles of operation ==

The [[MIWA]] JN utilizes [[dimple]] keys but functions the same as a standard [[Pin_tumbler |pin-tumbler]] lock. The dimple key of the JN has four cut depths for the two rows of side pins and two, different cut depths for pins in the two diagonal rows. The key is bitted on the sides and edges of the blade and is reversible. To open the lock, all active pin-tumblers -- across all four rows of pins -- must be aligned at the [[shear line]]. ''(See also [[Pin_tumbler#Principles_of_operation|Pin-tumbler, Principles of operation]])''.

The lock contains up 21 chambers for pin-tumbler stacks. At most, it is drilled for six pins in the right-hand side row of pins and five in each of the other rows. It is common for the lock to contain fewer than 21 pins. In that case the core, housing, and key may only be milled for the active pins. Each active chamber contains a set of key pin, driver, and spring.

MIWA utilizes a variety of [[security pin]]s to deter picking. Active pin stacks incorporate six total lengths of stainless steel key pins with several sizes of steel and brass driver pins to match. The JN uses standard driver pins which are cupped to allow the spring to nest inside the pins. Key pins are a combination of t-pins and multi-section tapered spools which are torpedo shaped to create overset traps.

There is no counter- or over-milling in the core. The lock does not contain bearings for centering the core nor does it house any additional mechanisms for drill protection.



== Disassembly instructions ==

Disassembly may vary by cylinder type. For the most common Japanese RIM cylinder the cylinder must first be removed from it's outer housing. It is kept in place by a single C-clip and positioned by washers in the outer housing. Care should be taken to preserve the order of these washers and internal components while disassembling.

The lock cylinder itself can be disassembled by removing the c-clip retaining the core and gutting the lock using a [[plug follower]]. Pins and springs can also be removed by sliding out each of the four [[bible cover]]s holding them in the lock.

<br clear="all">
== Gallery ==
<div align="center"><gallery align="center">
File:MIWA JN lock cylinders - FXE48151.png | MIWA JN lock cylinders
File:MIWA JN front keyway - FXE48203.png | Front, keyway
File:MIWA JN pin axes - MIWA JN four pin axes.png | Four pin axes
File:MIWA JN side row pins - FXE48162-Edit-2-Edit.png | Side row pins
File:MIWA JN key - FXE48212.png | Key
File:MIWA JN key - FXE48230.png | Key
File:MIWA JN dimple cuts - FXE48233.png | Dimple cuts
File:MIWA JN side pin - FXE48237.png | Side row pin
File:MIWA JN diagonal pin - FXE48241.png | Diagonal row pin
</gallery></div>



== See also ==

* [[MIWA]]
* [[Dimple|Dimple locks]]
* [[:Category:Lock_models|List of lock model articles]]

[[Category:Lock models]]
[[Category:MIWA]]
[[Category:Dimple_locks]]
[[Category:Pin-tumbler_locks]]

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MIWA JN - Revision history

Mgsecure: additional feature image

Mgsecure: /* Gallery */ add core side view

Mgsecure: New page for MIWA JN