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CISA 46870 30 mm Backset Upper and lower locking points Mortise lock (146870300)

CISA 146870300 is a 46870 series Grille-door mortise lock, fixed backset 30 mm, faceplate width 25 mm. Locking is provided by the upper and lower locking points, with threaded bushings; First check the upper and lower extension rods and floor-strike position.

CISA 146870300 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
46870
Backset
30 mm
Applicable door construction
Grille door
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

Selecting construction and installation dimensions

This row of 46870 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. Locking is provided by the upper and lower locking points, with threaded bushings; First check the upper and lower extension rods and floor-strike position.

The installation construction of Grille door must match Upper and lower locking points. Additional locking points use threaded bushings; both accessory interfaces and installation positions must match.

Check locking-point positions, door-edge strikes and internal installation space together; equal backsets alone do not establish interchangeability. 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 179 / printed page 175

Manufacturer documents are provided in their original language.

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AboutManufacturer documents are provided in their original language.