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How to measure your cylinder lock

Friday, 28 June 2019
How to measure your cylinder lock

Euro cylinders are used in the vast majority of double glazed doors, french doors and patio doors they are used to secure the door's multi point locking system.

Cylinder door locks are not difficult to replace if you have basic DIY skills, you only need two measurements.

Your cylinder locks should be as flush as possible with the handles, maximum projection is 5mm - if you current lock sticks out by more than 5mm either side of the hanldes then choose a smaller size.

Euro locks are the UK's most common type of door lock in use today, currently there are no required insurance standards, which in our opinion is crazy as the old cylinders or the new cheap versions are not anti snap, and do not have the TS007 ratings. In essence your front door can be opened in less than 20 seconds with a pair of pliers and a screwdriver.

Euro cylinder locks are now measured by the TS007 1 star, 2 star or 3 star ratings, the old British Standard kite mark rating is no longer a real measure of true security in modern euro lock design in our opinion - but all of the anti snap euro locks we sell have the BS kite mark (it's such a basic level compared to the TS007 rating)

If you want to hit 3 star security then you can buy the ABS TS007 3 star cylinders or the 1 star Yale Superior cylinders with the Yale Platinum door handles. Yale have just released the AS Platinum 3 star euro cylinder, however they can't be keyed alike (same key works on several locks to make life simpler and your key ring much lighter) in our opinion they offer no key security (anyone can copy your keys without your knowledge) and they are 40% more expensive than the ABS 3 Star cylinders that have already proven themselves in the real world - and the ABS Euro locks have excellent key security via a special key code card supplied with the lock.

Currently the only TS007 3 star rated anti snap euro locks in the UK are made by Avocet ABS, Yale and Mul-T-Lock. We stock the full range of the ABS locks, Yale Platinum euro locks and we can supply the Mul-T-Lock 3 star euro cylinders on request as they are much more suited to commercial systems (and much more expensive than the ABS euro locks and Yale AS Platinum). The Avocet ABS euro locks are ideal for domestic users wanting a great lock at a good price with maximum key security.

All the TS007 1 star and 3 star anti snap euro locks are also available as thumb turn locks on the inside of the door - they can also be keyed alike so all of your new locks work on the same key.

PLEASE NOTE! The new ABS Avocet Anti Snap Euro Cylinders use the internal measurement first... If in doubt just call us before ordering and we will make sure you get the right lock!

Link to our Anti snap euro locks here

Author: Mat Jenkins


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8 Years 18 Days 15 Hours 56 Mins 38 Secs ago
Richard Brooks:
My lock is 30mm outer-40mm interior total 70mm. The existing lock too long.
6 Years 11 Months 14 Days 3 Hours 45 Mins 56 Secs ago
I bought a 30/30 (60mm) euro cylinder lock which fits great however the screw is to short. It came with a 50mm screw and I need a 70mm screw. I could not see any option for this on your site to select sizes - can you assist?
6 Years 1 Month 3 Days 16 Hours 9 Mins 17 Secs ago
Confused by growing choice of 3-star cylinders:
As we approach 2016, there are now loads of 3-star anti-snap cylinders available (e.g. ABS, Mul-T-Lock XP, Kaba pExtra Guard, Squire Tri Star). What are the differences? Please could you do a general review about the pros and cons of these cylinders?
5 Years 5 Months 20 Days 14 Hours 31 Mins 58 Secs ago
terry mellor:
hello team, I need an additional abs barrel (chrome) I would say it's a 55 outside and 40 inside, I will email you a picture of the lock, contact 07768415418. thanks.
5 Years 4 Months 29 Days 11 Hours 8 Mins 20 Secs ago
Impact of size in choosing between Yale Platinum vs ABS 3-star euro lock cylinder:
I found your 'New Yale AS Platinum euro lock vs ABS 3 star euro lock' news very helpful, but it missed a key point. Yale Platinum would be the better choice in 30/30 size. The ABS cylinder doesn't have a British Standard kitemark in the 30/30 size, because
there's too high a chance that someone else's lock could have the same key as yours!
5 Years 4 Months 25 Days 4 Hours 50 Mins 20 Secs ago
Kevin Naylor:
Im after some 60mm cylinders. 35/25 or 20:10:30 but cant seem to find any anywhere. The customer wants the cylinder flush both sides and and thing different to this combination will effect that.
4 Years 5 Months 21 Days 11 Hours 21 Mins 58 Secs ago
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3 Years 11 Months 8 Days 11 Hours 46 Mins 59 Secs ago
Neil Cafferky:
Can you supply 3 keyed alike locks for different sizes eurocylinders?
3 Years 3 Months 13 Days 4 Hours 30 Mins 30 Secs ago
Can you please tell me if I can just measure the whole length of my barrel cylinder lock, or does it have to be measured by the two halves.? Thanks rob
2 Years 9 Months 14 Days 11 Hours 57 Mins 5 Secs ago
jack smythe:
hi, i have just removed an old union cylinder lock from french windows, measuring to centre of fixing hole is 36.5 from both ends and full length 73mm. Can you match with a high security cylinder (this took all of 3 mins to drill out and one minute to
pick tumblers and rotate the cam). so much for my security.
2 Years 9 Months 5 Days 12 Hours 7 Mins 31 Secs ago
john :
I need to replace my euro lock with a thumb turn unit it measures inside 45 outside 50mm can you tell me which to order
1 Year 6 Months 21 Days 12 Hours 20 Mins 48 Secs ago
george williams:
absolutely brilliant
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11 Months 4 Days 22 Hours 34 Mins 15 Secs ago
Paul Cresswell:
Hi. My existing cylinder measures 50mm inside and 45mm outside. I got a new 3* one but it is wrong. When ordering a cylinder. Do you put 50/45 or 45/50. I got the former?.
11 Months 1 Day 13 Hours 41 Mins 51 Secs ago
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