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CISA 46875 30 mm Backset Upper and lower locking points Mortise lock (146875300)

CISA 146875300 is a 46875 series Security-shutter leaf mortise lock, fixed backset 30 mm, faceplate width 25 mm. The upper and lower locking points provide the main locking action; do not select strikes using the layout of a central-bolt lock.

CISA 146875300 Fixed backset 30 mm Original measurement guide
Our original diagram: backset 30 mm is the horizontal distance from the door-edge faceplate reference to the cylinder centre axis. It is not overall case depth or handle-to-cylinder centre distance; not to scale; not a product outline or installation drawing.

Specifications

Product series
46875
Backset
30 mm
Applicable door construction
Security-shutter leaf
Body construction
Upper and lower locking points
Faceplate width
25 mm
Case material
Galvanized steel
Faceplate material
Stainless steel
Spindle specification
8 mm
Additional locking-point interface
Threaded bushings
Handle-to-cylinder centre distance
85 mm

Selecting construction and installation dimensions

This row of 46875 has a fixed backset of 30 mm. Check the distance from the door-edge faceplate reference to the cylinder centre axis; overall case depth cannot substitute for it. The upper and lower locking points provide the main locking action; do not select strikes using the layout of a central-bolt lock.

The installation construction of Security-shutter leaf must match Upper and lower locking points. Additional locking points use threaded bushings; both accessory interfaces and installation positions must match.

The handle-to-cylinder centre distance is 85 mm; this and the 30 mm backset are installation dimensions in different directions. Check cylinder length and trim on both sides separately for the actual door.

Limitations

  • The backset diagram only explains the measurement reference from the faceplate to the cylinder axis; it is not an outline, drilling or installation drawing.
  • Check cylinders, extension rods, strikes and other accessories against the specific model; accessories listed in the catalogue as available on request are not standard equipment.
  • Series certification or suitability does not establish that any complete door currently meets the corresponding grade.

Sources

CISA 2026 English catalogue, PDF page 176 / printed page 172

Manufacturer documents are provided in their original language.

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AboutManufacturer documents are provided in their original language.