Surprise Multipoint Gearbox – Lift Lever
Surprise gearboxes are available in 35mm or 45mm backset with a single spindle mechanism.
Single spindles are sprung and can only be used as a lift lever function.
Surprise gearboxes measure 228mm high by backset +15mm. The latch measures 30mm high, as does the deadbolt. There is 65mm between the bottom of the latch and the top of the deadbolt.
Gearboxes are fitted to faceplates with 3 screw holes. The top to middle screw hole measures 109mm and the middle to bottom also measures 109mm.
Earlier versions of these gearboxes also had a small spindle hole at the top of the case, near to the latch. This was used to hold the latch back.
Operation: Lift Lever
Latch reversal: Undo the screw in the latch to remove. Reverse and reinsert then replace screw.
To lock the door
1. Lift the handle upwards to engage the locking points.
2. Lock the locking points and main deadbolt (if present) by turning the key.
To unlock the door
1. Unlock the system by turning the key.
2. Push the handle downwards to disengage the locking points and retract the latch.
Price range: £36.20 through £54.45
- Manufacturer: Surprise
- Backset: 35mm or 45mm
- Centres PZ: 92mm
- Case Height: 228mm
- Case Width: Backset + 16mm
- Copy/Genuine: Genuine
- Cylinder Type: Euro
- Handing: Not Handed
- Main Gearbox: Latch & deadbolt
- Spindle: Single 8mm
- Operation: Lift Lever
- Packaging: Supplied in singles
| Backset | 35mm, 45mm |
|---|
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The original Avocet 2 hook, 2 roller lock features unique locking positions.
Often known as the yellow version and shouldn’t be confused with the silver AVO352H2RSS which has different roller positions.
Avocet multipoint door locks are easily identifiable once they are removed from the door. Faceplates are usually stamped with the Avocet logo, although older locks may have the “WMS” logo stamped. Gearboxes are uniquely shaped, with the cut out extending below the latch, which is unique when identifying multipoint locks.
Avocet multipoint door locks were originally available in a wide range of different configurations featuring hooks, rollers, deadbolts and an Affinity Bastion lock with opposing hooks. Earlier versions of Avocet multipoint locks were made in yellow passivated steel, which have a distinctive brassy colour. Recently, the locks have changed with faceplates made from a stainless steel or a Trivalent silver finish.
When these locks swapped from yellow passivated to silver, the majority of variations were replaced. Notable exceptions include the 2 roller and 2 mushroom lock as well as the shorter version of the 3 deadbolt lock designed for use on caravans. Please contact us if you would like assistance finding the best replacements for these locks.
Also, it’s worth noting some Avocet multipoint door locks feature a “sash lifter” device. This device was designed to help ensure the correct sash to frame alignment but these are no longer available so we would recommend replacing these locks with the standard version.
Most Avocet locks are only available in a 35mm backset, but the Affinity Bastion lock is designed for composite doors and feature a 45mm backset.
Although some original Avocet multipoint 4 roller door locks feature a single spindle and lift lever functionality, all current locks are only available in a double spindle nightlatch configuration. The centres are at 62mm and 92mm, but if the nightlatch functionality is not required, the lock can still be used as a lift lever version using the top spindle.
All Avocet locks which are designed for PVCu with a flat 16mm faceplate have the ability to accept shootbolts.
Avocet gearboxes measure 218mm high x backset + 15mm. It’s the large cut out in the top corner, that extends below the latch which makes them unique. This feature can assist with the fitment of handles as the screws are located above the lever.
Avocet gearboxes feature a latch that is 29mm high and a deadbolt that is 34mm high with a distance of 82mm between the top of the deadbolt and the bottom of the latch.
These gearboxes are not attached to the strip using conventional screws or rivets. Instead, the gearboxes are held by arms which connect using circlips. While it’s possible to remove a gearbox from a full Avocet lock, we would advise replacing the full unit. Also, it’s worth noting the design of the arms have changed over time and older gearboxes have a flat clip. Newer versions have a slightly curved connecting arm located lower down making gearbox swaps with newer for older versions impossible.
When measuring the backset, allow 2-3mm for the faceplate, so a 35mm backset gearbox will measure 32mm when not fixed to the strip.
Avocet hooks throw in opposing directions, with the top hook going upwards, and the bottom hook throwing downwards. Hook boxes are 123mm high and doors that are normally prepared to 150mm will accept the hook case.
Avocet deadbolts feature a 20mm throw made from nickel plated brass. The deadbolt gearboxes feature a distinctive chamfered design, in contrast to the square design of Avocet hook cases.
Rollers are manufactured from nickel plated brass. They are used for compression, to pull the door against the frame, to help prevent dust or water ingress. They do little for security, but they also have the added benefit of helping to prevent the door from becoming warped as it is supported across its full height. This is dependent on the rollers being engaged into their keeps.
Operation: Double Spindle
To lock the door
1. On closing the door, the latch is automatically engaged.
2. Lift the handle up to engage the locking points.
3. Lock the system by turning the key.
To unlock the door
1. Unlock the system by turning the key.
2. Push the handle downwards to disengage the locking points.
3. A further quarter turn of the key will retract the latch.
- Corrosion resistance: BSEN1670:2007 Grade 4
- Tested to 100,000 cycles.
We stock a range of associated products for Avocet multipoint door locks, including keeps, spindles, handles and accessories.
Latch Reversal: Depending on the date of manufacture. Either РUndo the hexagonal screw on side of the lock case to remove latch. Reverse, reinsert and replace the screw. Or undo screw in the centre of latch, reverse, reinsert and replace the screw.
You may find this lock used as an UPVC door lock or an aluminium door lock.
SKU: AVO352HB