master lock # 21

by **jimmysmith** » 25 Mar 2007 16:21

has anyone checked out these master lock #21, a guy just gave me one the other day. it does not have a m1 keyway. and it looks to have a changeable core of some sort. but it still looks like a normal master lock.
I wonder why i have not seen these around. Ihave not picked it open to see if it does infact have a changable keyway.. but i plan to very soon.
has anyone else seen or have these locks..

by **jimmysmith** » 25 Mar 2007 16:41

guess I was wrong. It's not a 4 pin cylinder like i expected just because of the way the lock looks. its actually a 5 pin cylinder.

I wonder because its a 5 pin ...does it have security pins. ?

by **cjames73** » 25 Mar 2007 16:55

jimmysmith wrote:I wonder because its a 5 pin ...does it have security pins. ?

only one way to find out, strip it down :wink:

by **Chucklz** » 25 Mar 2007 18:20

If you look at a standard M1 keyway, this appears to be the "reverse" of that. I was once told this is commonly referred to as the "beveled" keyway, but I don't know if that is a common term for it.

That cylinder is gunked up awfully. Id strip it down.

by **jimmysmith** » 25 Mar 2007 18:47

I took her all apart. beside having 5 pins nothing special about it. No security pins.
Is this reverced keyway a restricted keyblank? I am just wondering why on this interchangable core a odd keyway?

by **zeke79** » 25 Mar 2007 18:57

That is not technically an interchangable core, but it is a removable core lock.

by **cjames73** » 25 Mar 2007 19:15

jimmysmith wrote:I took her all apart. beside having 5 pins nothing special about it. No security pins.
Is this reverced keyway a restricted keyblank? I am just wondering why on this interchangable core a odd keyway?

on the #21 the keyway is a k27 so your key orientation is standard.

by **Chucklz** » 25 Mar 2007 19:26

From the masterlock service manual, it appears to be a K27. I doubt its restricted, but I doubt your average WalMart or Home Despot happens to cary the blank. (Besides the fact that Home Despot key cutting ability is hilariously pathetic).

by **mercurial** » 25 Mar 2007 20:46

My Master #570 has the same keyway.

It isn't restricted, just a little less common than the M1 keyway. It is, as stated above, a mirror image of the M1 keyway.

The blanks are easy to find here in Australia.

I've seen mention on the site in the last few months that the 'reversed' M1 keyway makes picking a lot more difficult. I do not find this to be the case, I wonder if people find it hard just because they are so used to picking inside M1 keyways instead?

...Mark

by **jimmysmith** » 26 Mar 2007 0:27

thanks for all the good infomation.
It actually was a little diffrent picking it but not hard.

I just never got to see one of thses.

by **copeman** » 3 Apr 2007 9:59

how did you remove the core? did you drill out what apears to be a pop rivet

by **UWSDWF** » 3 Apr 2007 10:11

nah that model is re-keyable so it most likely has a hex screw in the shackle hole

by **copeman** » 5 Apr 2007 1:15

yes the allen wrench i remember those types thanks

copeman

master lock # 21

master lock # 21

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