BB mortise locks

BB mortise locks have a warded keyhole which is named after the key shape of the so-called warded key. They are often used for interior doors.

Backset (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.

Dimensions mortise lockDimensions mortise lock

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.

Door alignmentDoor alignment
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  • brand BB mortise lock, rebated doors, forend 18 mm

    Delivery Time: 4 - 8 business days

    square spindle:
    8 mm
    forend width:
    18 mm
    backset:
    55 mm
    distance:
    72 mm
    classification:
    DIN 18251, class 1

    €9.65
    incl. 19% VAT , excl. Shipping Cost

    Delivery Time: 4 - 8 business days

  • brand BB mortise lock, square forend 20 mm

    Delivery Time: 4 - 8 business days

    square spindle:
    8 mm
    forend width:
    20 mm
    backset:
    55 mm
    distance:
    72 mm
    classification:
    DIN 18251, class 1

    €9.10
    incl. 19% VAT , excl. Shipping Cost

    Delivery Time: 4 - 8 business days

  • brand BB mortise lock for non-rebated doors, forend 24 mm

    Delivery Time: 4 - 8 business days

    square spindle:
    8 mm
    forend width:
    24 mm
    backset:
    55 mm
    distance:
    72 mm
    classification:
    DIN 18251, class 1

    €10.30
    incl. 19% VAT , excl. Shipping Cost

    Delivery Time: 4 - 8 business days

  • brand BB mortise lock with silent latch for noise insulation

    Delivery Time: 4 - 8 business days

    square spindle:
    8 mm
    forend width:
    20 mm
    backset:
    55 mm
    distance:
    72 mm
    classification:
    DIN 18251-1, class 1

    €28.00
    incl. 19% VAT , excl. Shipping Cost

    Delivery Time: 4 - 8 business days

4 Items