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The FUHR 859 Type 3 door lock design has been adapted to make it suitable for installation on flush fitting doors including timber, composite and steel. We recognise the importance of having hardware specifically designed for this application to ensure accurate fitting, efficient operation and no compromise on security and product features.
Split Spindle operations is traditionally used to offer additional security as the external lever does not operate the latch, the traditional method requires the use of two spindles, one to operate the lock and one for the external handle.
FUHR’s 859 series spilt spindle design only requires one spindle which is “split” allowing the user to determine the lock operation by the handle used. The two part design of the spindle allows Lever / Pad operation allowing the latch only to be released by the key, not the handle. Alternatively a single piece spindle can be used with the lock allowing lever operation from inside and outside.
The FUHR 859 Type 3 is ideal in applications where security is a concern. This lock features 2 hooks, 0 roller cams, reversible latch and deadbolt. The hooks engage in pressed steel locking keeps which are profile related for a secure fit, without packers. The Type 3 can also be supplied with an extended drive rail and serrations for optional shootbolts.
Throw:
Please note, no rollers are on this door lock for Timber / Composite use. The line drawing shows the hook dimensions, please disregard the roller positions.
PAS 24 is an enhanced security performance test for door assembly requirements, every component used within the door set tested must comply to the relevant British Standard for that component.
PAS 24 includes several security tests, such as:
An example of the intensity of the testing, the mechanical loading tests subjects the door set to 4.5Kn of pressure, the equivalent of approximately 45 times the pressure used to tighten a car wheel nut.
Backset
The backset is the dimension from the front of the faceplate to the centre of the handle spindle or cylinder hole.
The most popular backset sizes are 25mm, 30mm, 35mm and 45mm.
The backset dimension is the distance between A and B on the diagram.
PZ Centre
The "PZ" or "Centre" is the distance between the centre of the handle spindle and the centre of the round section of the cylinder.
The PZ Centre dimension is the dimension between C and D on the diagram.
Multipoint locks can have one or two spindle holes (also known as followers) these type of locks will have two measurements, the most popular being 62mm / 92mm.
Most modern locks with one spindle are 92mm centre, however some older locks may be 70mm or 72mm.
On most FUHR locks, to change the handing you remove the small grub screw on the side of the lock case adjacent to the latch plate with a 2mm allen key.
Remove the latch and turn in it 180º vertically, place it back into the opening and secure the grub screw back in place.
The FUHR 871 and FUHR 881 door locks are supplied handed, this cannot be changed, so please ensure you order the correct handing for the application.
Step 1 Unscrew and remove the 3 screws as shown in the video
Step 2 Remove the lockcase
Step 3 Clip the replacement lockcase in place
Step 4 Replace the 3 screws
Hook and Keep alignment:
The hook and keep should be aligned using the guideline on the hook plate. Ensure the hook engages correctly avoiding friction on which can result in damage to the hook, there should be a 2mm gap between the line on the hook plate and the flat of the hook as shown in the diagram.
Latch and hook adjustment:
Take care not to over adjust the hook keep as this can damage the keep - do not rotate through 360º. A screwdriver and a 4mm allen key will be required when adjusting these plates.
Roller and mushroom adjustment:
Adjust eccentric compression of roller and mushroom keeps to ensure the optimum compression for the door. Adjust the compression using a 4mm allen key.
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