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Bump Patterns


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#1 Master Cutter

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Posted 11 January 2007 - 05:27 AM

hello
I was always confused as to why vendors only offer keys cut in ONE bump-pattern. My experience tells me different patterns can make the difference - even when cut at the same depth - between a successful bump and not.
There are other benifits too. I've developed a 'serpentine' style cut, like the humps of a sea-monster. Not only do I find this hugely successful, but as far as I can work out it has the most metal of any bump pattern and therefore will last longer. I the drawing you'll see all three, but the photo's are of my radiused/rounded cut and the serpentine. What do you think?
Also, is everyone (who makes keys) aware of Vernier callipers? If you're not, check them out on google
regards
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#2 BLK

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Posted 11 January 2007 - 06:26 AM

Your design would also make it less likely to have a stuck key. Great idea.
Bump it to the next level.

#3 Master Cutter

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Posted 11 January 2007 - 04:49 PM

Thank you very much, that pattern makes a fine bump key. You know, as I use that pattern all the time, I'd forgotten some bump-keys get stuck, it's just not something that's part of my bump-vocabulary. I remember when I first started making keys I'd occasionally get a key completely stuck, Trying to make radiused with the wrong tools and the wrong know-how, the 'unknow-how' as it were, and way one of them got stuck. Cleverly - and if most people were to be honest they'd admit it too - I'd put it in a lock on an in-use door. My neighbours' (that is the correct UK spelling) front door at that. It was extra stupid as I almost knew it would happen as it was a razor sharp little weapon really, with five deadly ninja-like spikes along the ridge. Anyway, after putting all my strength into yanking it out (with my other hand pushing up the pins with a pick), I lacerated my finger tip until I was bleeding profusely.
I also managed to scrape the screen of my ipod-nano rendering it useless and all musical choices a random product of many random choices.
There's a couple of lessons there:
1 - Sharp bits of metal cut your hand open and make you cry like a girl
2 - The self same bit of metal can ruin your cellphone/ipod/bollock
Cheers all, all comments welcomed
Master Cutter

#4 C0wT1pp3r

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Posted 23 February 2007 - 07:52 PM

lol. that wasnt such a good idea. but does it really matter THAT much on american schlage locks? just wondering, because i would very much like to use a smooth bump key instead of the traditional angled key.

#5 Tim

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Posted 26 April 2011 - 10:36 PM

I think smooth edges in the valleys will work great because the pins move easily in this type of filing.