CISA 52731 70 mm Backset Heavy-duty bathroom/bedroom mortise lock (152731700)

Lock and fitting dimensions

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

Specifications

Backset

70 mm

Faceplate width

22 mm

Case

Galvanized steel

Latch

Reversible nickel-plated silent construction

Faceplate ends

Rounded ends

Centre distance

85 mm

Bolt/latch configuration

Bolt and latch

Bolt throws

1

Bolt drive

8 mm Square spindle

Latch drive

Handles on both sides

Construction and operation of this version

152731700 is an explicit ordering row in the 52731 series with backset 70 mm. This bathroom/bedroom version operates its bolt with a 8 mm square spindle, rather than the key cylinder of an ordinary entrance lock. Confirm compatibility of the inside and outside privacy controls with the lock body; an identical 85 mm centre distance alone does not allow interchangeability.

How to check installation dimensions

This model's backset is 70 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

• 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

Manufacturer documents are provided in their original language.

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