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UK Bump Keys only need FOUR cuts


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#1 bumpfiend

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Posted 21 August 2006 - 03:06 PM

Hello all
My bump keys (UK) only have FOUR grooves as the pin nearest the entry only needs to go UP, not DOWN. I find this very useful as any broken keys I've used used to break along the bottom of the cut nearest the head. I call them 'Candy Keys' as (in theory) they have a tooth missing. I've had a lot of greif on another site saying I'm wrong and it's impossible. However I do it all day long so?????
What do you all think? :?:
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#2 IcerC

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Posted 21 August 2006 - 07:15 PM

I don't fully understand.
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#3 Master Cutter

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Posted 29 December 2006 - 05:36 PM

Things have changed a lot at UKBK since bumpfiend was there. But a five pin lock can be bumped with only four grooves if you use a ground down shoulder as the last peak and the tip as the first. That's 5 peaks in total.

#4 fred5874

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Posted 02 January 2007 - 10:30 AM

It sounds like it works similar to the pull out method. The tip moves the first pin and the back of the 4th cut moves the 5th pin.