Name: CISA 52710 90 mm Backset Heavy-duty entrance mortise lock (152710900)
Brand: CISA

CISA 152710900 — Official series illustration, not a photo of this exact size variant; consult model specifications. — Official series illustration, not a photo of this exact size variant; consult model specifications.Image source

152710900 backset 90 mm measurement-reference diagram; not a product view — Drawn by this site from the explicit dimensions of the corresponding model; the diagram is not to scale and is not a drilling template.

Lock and fitting dimensions

Dimensions from model documentation
Specifications	Dimensions from model documentation
Backset	90 mm
Faceplate width	22 mm
Centre distance	85 mm

Check the backset, centre distance, faceplate and mounting points against the specific model drawing.

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Specifications

Backset: 90 mm
Faceplate width: 22 mm
Case: Galvanized steel
Latch: Reversible nickel-plated silent construction
Faceplate ends: Square ends
Centre distance: 85 mm
Bolt/latch configuration: Bolt and deadlocking latch
Bolt throws: 1
Bolt projection: 25 mm
Inside and outside operation: Handle or cylinder operates the latch; cylinder operates the bolt

Construction and operation of this version

152710900 is an explicit ordering row in the 52710 series with backset 90 mm. The entrance lock with a square-ended faceplate controls its latch and bolt through different paths: handles on either side or the cylinder operate the latch, while the cylinder operates the bolt. The 25 mm bolt projection is not backset or door thickness.

How to check installation dimensions

This model's backset is 90 mm, the distance from the specified door-edge faceplate reference to the operating axis. Faceplate width, centre distance and external lock-body depth describe different directions and must not substitute for one another.

For replacement, record the old lock's full number, faceplate-end shape, inside and outside operating components and strike positions; when changing handing or linked rods, confirm interfaces according to the product instructions.

Limitations

The catalogue's fire-certification description is limited to specific stainless-steel finish configurations; it cannot be restated as a current compliance conclusion for this record or any complete door.
Series certification and catalogue descriptions of fire or escape applications do not mean this model meets current requirements when installed in any door assembly.
Check accessories against the corresponding model and installation instructions; Cylinders, rods and escutcheons listed as available on request are not standard equipment.

Sources

CISA 2026 English catalogue, PDF page 349 / printed page 345

Manufacturer documents are provided in their original language.

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