- Door locks
- FH mortise locks
FH mortise locks
FH mortise locks are suitable for fire resistant doors or fire protection doors. Their field of application extends to interior and exterior doors.
>> read moreBackset (in mm): Is the distance from the centre of the lever handle or lock cylinder to the front edge of the forend.
Distance dimension: Is measured from the centre of the lever hub or turning knob to the centre of the cylinder recess (keyhole).
This measure is standardized in Germany with the following dimensions:
- 72 mm interior apartment doors
- 78 mm WC - doors
- 92 mm front doors / apartment doors outside
Square spindel:
- square spindel 8 mm for room doors
- square spindel 9 mm for fire protection doors
- square spindel 10 mm for external doors
Forend width and length:
The forend is the front face of the mortise lock which is visible after installation in the door. The design of forend can be rounded or square.
Door alignment:
The DIN direction of the door alignment is also important for the selection of the lock. A distinction is made here between DIN right and DIN left.
If the door hinges are on the left-hand side when observer looks at the closed door, this is a door with a DIN left door,
if the door hinges are on the right side, this is a DIN right door.
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