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Author Topic: one way security screws  (Read 6706 times)

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Offline Davepatrol

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one way security screws
« on: January 06, 2016, 12:58:02 PM »
Do's anyone know how or if there is a way to undo those one way security screws that are used to attach window locks  :-[ :'(
 :cheers: Dave
 
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Offline Troopy_03

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Re: one way security screws
« Reply #1 on: January 06, 2016, 01:08:32 PM »
with these:
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Offline Davepatrol

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Re: one way security screws
« Reply #2 on: January 06, 2016, 01:28:35 PM »
Yeah tried the drill but screws are to seem to hard.
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Offline edz

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Re: one way security screws
« Reply #3 on: January 06, 2016, 01:33:54 PM »
https://www.youtube.com/watch?v=4_B4iRpBe7U   ..   A small Dremal cutting or grinding disc to grind / cut slots or buy an Unscrew driver kit .. Amazon / Alibaba etc
« Last Edit: January 06, 2016, 01:48:09 PM by edz »
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Offline terravista

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Re: one way security screws
« Reply #4 on: January 06, 2016, 01:43:01 PM »
You could try someone who makes security screens, or if the window has a manufacturers name try them or a distributor.
Our local Home Hardware has a window and security section and you can buy a screwdriver bit made for them for $15
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Offline Davepatrol

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Re: one way security screws
« Reply #5 on: January 06, 2016, 02:26:45 PM »
I'll try and get the unscrew kit, as there isn't any room to grind a slot.
this is the type of lock
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Offline Champin

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Re: one way security screws
« Reply #6 on: January 06, 2016, 03:47:46 PM »
You may get them with a cobalt drill bit. They're a bit harder than the standard bit. Any good bolt store should have them.
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Offline Davepatrol

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Re: one way security screws
« Reply #7 on: January 06, 2016, 04:21:48 PM »
Because  the screw slot is raised in the midle  thedrill just jumps around
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Offline Robbo

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Re: one way security screws
« Reply #8 on: January 06, 2016, 05:35:13 PM »
This could be worth a try. Use a center punch placed on the sloped portion( as close to the outer edge of screw head as possible) of the one way and rap repeatedly with a hammer. Once the the head makes a few turns and rises above the surface, just use the vise grips to grab the head and complete the unscrewing. This method works on the flat headed ones that are flush with surface and hardest to remove. Just remember to direct the fast raps to "walk" the screw, no hard blows needed. A hard blow can cause the punch to slip and mar the work.
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Offline feisty

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Re: one way security screws
« Reply #9 on: January 06, 2016, 06:20:00 PM »
Visit your local friendly locksmith. Get a couple of keys cut and ask him in passing....
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Offline S.W

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Re: one way security screws
« Reply #10 on: January 06, 2016, 06:25:46 PM »
I've drilled them out before. Not easy and slow but it works! You only need to drill deep enough until the head of the screws breaks away, then pull the lock off an wind the remaining screw out of the window with vice grips.

Failing that I'd be using a centre punch as described above.
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Offline dales133

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Re: one way security screws
« Reply #11 on: January 06, 2016, 06:38:49 PM »
Yep ive drilled out heaps of them.
Center punch them then start with a 1/8 or smaller bit and step up sizes.
As already said you dont have to drill more than about 5mm.
Most of them the bolt head breaks off when they are fitted and i wasnt aware there was a key avaliable for that type
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Offline kylarama

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Re: one way security screws
« Reply #12 on: January 06, 2016, 08:23:36 PM »
You can get the removal tools here. A bit pricey and can be a bit hit and miss with tight screws or if the head is damaged.

http://www.allfasteners.com.au/1way-drive-removal-tool



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Offline oldmate

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Re: one way security screws
« Reply #13 on: January 06, 2016, 10:09:09 PM »
Quote from: dales133 on January 06, 2016, 06:38:49 PM
Yep ive drilled out heaps of them.
Center punch them then start with a 1/8 or smaller bit and step up sizes.
As already said you dont have to drill more than about 5mm.
Most of them the bolt head breaks off when they are fitted and i wasnt aware there was a key avaliable for that type


x2
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Offline Davepatrol

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Re: one way security screws
« Reply #14 on: January 06, 2016, 10:47:57 PM »
These are hardened screws a center punch dont leve a mark on them,  they are in the lock so i have 10mm x 10 mm to work on them
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Offline mumbls

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Re: one way security screws
« Reply #15 on: January 06, 2016, 11:10:48 PM »
I work as a security installer (doors, screens, window locks etc) and get this from time to time. We use a cordless dremel to cut a slot into the top of the screw and then use a good quality flat blade to remove it. Also giving the screwdriver a tap with a hammer before trying to remove will also help break any corrosion that may have formed. Why are you trying to remove the offending lock?
« Last Edit: January 06, 2016, 11:12:48 PM by mumbls »
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Offline Davepatrol

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Re: one way security screws
« Reply #16 on: January 07, 2016, 12:16:39 AM »
Quote from: mumbls on January 06, 2016, 11:10:48 PM
I work as a security installer (doors, screens, window locks etc) and get this from time to time. We use a cordless dremel to cut a slot into the top of the screw and then use a good quality flat blade to remove it. Also giving the screwdriver a tap with a hammer before trying to remove will also help break any corrosion that may have formed. Why are you trying to remove the offending lock?
It's a brand new lock, Me being a dickhead :-[ and not checking, put the wrong spacer on and the lock part doesn't reach to lock, :'( alcohol might have been involved. ;D
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Offline mumbls

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Re: one way security screws
« Reply #17 on: January 07, 2016, 07:56:58 PM »
How'd you go? Get it off? One other thing to try is to get a high quality screwdriver that fits the slot perfectly(this bits important). While pushing down on the screwdriver with one hand. Twist with the other. Sorry, should have said to try this in my post last night.
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Offline mahimahimaster

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Re: one way security screws
« Reply #18 on: January 07, 2016, 08:23:07 PM »
Locksmith here. I use a left handed drill bit with the end ground flat. It sits in the screw head and bites into the ramps of the head when you use the drill in reverse.

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Offline mumbls

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Re: one way security screws
« Reply #19 on: January 07, 2016, 08:27:56 PM »
Quote from: mahimahimaster on January 07, 2016, 08:23:07 PM
Locksmith here. I use a left handed drill bit with the end ground flat. It sits in the screw head and bites into the ramps of the head when you use the drill in reverse.

Sent from my SM-G900I using Tapatalk

I like that one. Going to add that to the arsenal  :cup:
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Offline Davepatrol

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Re: one way security screws
« Reply #20 on: January 07, 2016, 09:31:08 PM »
Quote from: mumbls on January 07, 2016, 07:56:58 PM
How'd you go? Get it off? One other thing to try is to get a high quality screwdriver that fits the slot perfectly(this bits important). While pushing down on the screwdriver with one hand. Twist with the other. Sorry, should have said to try this in my post last night.
All turned out good, It was the perfect excuse to buy a new battery operated Dremel, I then fitted a tiny cutting wheel on it and cut the screw slot deeper so a screw driver could undo it, so all refitted and working perfectly  :cup: :cheers:
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Offline tracker

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Re: one way security screws
« Reply #21 on: January 08, 2016, 08:27:37 PM »
A set of ezyouts may do the job
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Offline Troopy_03

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Re: one way security screws
« Reply #22 on: January 10, 2016, 08:18:02 AM »
Quote from: tracker on January 08, 2016, 08:27:37 PM
A set of ezyouts may do the job
See the second post  ;D
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