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Master lock no 81 key dimensions

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twenglish 1

Active Member

Posts: 287

Joined: Sat Dec 27, 2014 2:09 am

Location: Pennsylvania

Post Fri Feb 20, 2015 10:13 pm

Master lock no 81 key dimensions

I have an old master lock no 81 with no key, I can easily pick it, but would like to use it for practice making a bump key, I am going to hand file the key but I have no idea what dimensions to use between pins or how deep to make the cuts and I haven't been able to find too much info on the key dimensions online
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jharveee

Active Member

Posts: 743

Joined: Thu Aug 22, 2013 3:14 pm

Location: San Marcos, Ca.

Post Fri Feb 20, 2015 10:32 pm

Re: Master lock no 81 key dimensions

Space to first cut 0.187
Spacing between cuts 0.125
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twenglish 1

Active Member

Posts: 287

Joined: Sat Dec 27, 2014 2:09 am

Location: Pennsylvania

Post Fri Feb 20, 2015 10:37 pm

Re: Master lock no 81 key dimensions

And that is measured from the stopper on the blank?
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jharveee

Active Member

Posts: 743

Joined: Thu Aug 22, 2013 3:14 pm

Location: San Marcos, Ca.

Post Fri Feb 20, 2015 10:40 pm

Re: Master lock no 81 key dimensions

yes,
Shoulder, I sometimes call it.
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twenglish 1

Active Member

Posts: 287

Joined: Sat Dec 27, 2014 2:09 am

Location: Pennsylvania

Post Fri Feb 20, 2015 10:56 pm

Re: Master lock no 81 key dimensions

What's the depth of the deepest cut? Do you know where I can find this info for other locks?
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jharveee

Active Member

Posts: 743

Joined: Thu Aug 22, 2013 3:14 pm

Location: San Marcos, Ca.

Post Fri Feb 20, 2015 11:01 pm

Re: Master lock no 81 key dimensions

Most of this info is on the net.
Just google "masterlock key bitting"

there is a PDF- Tech Manual
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jharveee

Active Member

Posts: 743

Joined: Thu Aug 22, 2013 3:14 pm

Location: San Marcos, Ca.

Post Fri Feb 20, 2015 11:27 pm

Re: Master lock no 81 key dimensions

http://kstoerz.com/locksport/bitting/
Gordon posted this the other day.
If I copied the link correctly, should get you all the info.
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twenglish 1

Active Member

Posts: 287

Joined: Sat Dec 27, 2014 2:09 am

Location: Pennsylvania

Post Sat Feb 21, 2015 6:53 am

Re: Master lock no 81 key dimensions

Very useful link, thank you

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