This Fuhr 833 - Slam Shut multipoint door lock features 1 Deadbolt, 1 Latch & 2 Autolatches.
The Autosafe 833 multipoint door lock suits aluminium, PVCu, composite or timber doors. It combines automatic locking functionality to protect a property from unauthorised access from the moment the door is closed. The lock also helps to prevent warping of doors by holding the door in place by all locking points rather than relying on the home owner to lift the lever.
On closing the door, the latches turn into solid latching deadbolts throwing 20mm into the frame to provide security against forced entry. Night/child proof the lock with a simple key turn, the interior lever is blocked and the main bolt engaged. Unlocking from the inside is easy by operating the lever handle. This is ideal when in a hurry, the door automatically locks on closing. The autosafe 833 provides the perfect security for main entrance doors of residential or public buildings made of aluminium, composite, PVCu or timber. Also available with an optional panic function to allow unimpeded escape from the inside.
Identifying a Fuhr lock is easiest once it has been removed from the door. The gearbox is distinctive and once you've seen one Fuhr lock, you'll be sure to recognise another. Its worth noting that there are some subtle differences between the 856 (lift lever), 859 (split spindle) and 855 (keywind) multipoint door lock gearboxes, but they are all recognisable as made by Fuhr. Almost all Fuhr locks will have the name stamped on the faceplate, but a reliable way to identify the lock is the triangular shape at the top of the gearbox, adjacent to where the top fixing screw connects to the faceplate.
The 833 Slam Shut UPVC door lock is also identifiable by its auto deadlatches at the top and the bottom of the lock.
Automatic locking multipoint locks also have the added benefit of always having the locking points engaged in the middle, top and bottom of the lock, when the door is closed. That differs to a normal multipoint lock, where the user may not always throw the locking points, leaving the door closed on the central latch, only. As the door is not held against the frame across its entire length, that can lead to doors becoming bowed or warped over time and as they are exposed to the elements. Automatic locking multipoint locks help alleviate this issue as, when the door closes, the door will be automatically held against the frame in the middle, top and bottom of the door. That helps ensure that the door stays straight and true.
Fuhr 833 multipoint door locks are available in a large range of backsets including 35, 40, 45, 55 and 65mm, some of which may be available by special order. These gearboxes feature a deadbolt which throws 20mm. The gearbox measures 220mm x width + 18mm. The latch and deadbolt are both 31mm high and there is 61mm between the bottom of the latch and the top of the deadbolt. Gearboxes are fixed to faceplates with 3 screws.
Fuhr locks feature a ball bearing and spring pre-fitted. There is a tiny notch on the sliding internal strip that the ball bearing engages (under spring tension) and give a more positive locking feel when handle operated. If you try a lock without this spring and ball bearing fitted, you'll notice the difference. Some replacement gearboxes on the market are sold without the ball bearing and spring, but all of Duffells' replacement Fuhr gearboxes come with these pre-fitted for a direct swap.
Fuhr auto deadlatches are chamfered to fire into keeps when the door is closed. The cases are slightly larger than standard Fuhr hook cases at 150mm high by 50mm wide.
Operation: Automatic Locking
Unlocking from the outside: Euro profile cylinder.
Locking by closing the door: The latching deadbolts automatically throw a full 20mm and remain blocked until operated.
Locking using the key: The main bolt can then be locked by a simple turn of the key, the handle is blocked as a control and as a child lock.
Opening via the handle: The door is unlocked by means of the handle from the inside, the latch and the latching deadbolts are retracted.
Opening via the Euro profile cylinder: During the first step of operating by the key the latch deadbolts retract 10mm. After the second part of operation the latch and the latching deadbolts are completely retracted, the door can now be opened.
To lock the door
1. On closing the door, the latch and locking points are automatically engaged as the triggers on the door connect with the keeps on the frame.
2. Turn the key to deadlock the mechanism.
To unlock the door
1. Turn the key to unlock the mechanism.
2. If you have a lever, push the lever down to retract the locking points. Alternatively, a further quarter turn of the key will retract the latch to open the door.
We stock a range of associated products for Fuhr 833 - SlamShut multipoint door locks, including keeps, spindles, handles and accessories.
You may find this lock used as an UPVC door lock, an aluminium door lock, a timber multipoint door lock or a composite door lock .