ISEO Infilare 200N Mortise lock with two handle spindle holes | Backset 50 mm (221N501)

Lock and fitting dimensions

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

Specifications

Construction

Mortise lock with two handle spindle holes

Backset

50 mm

Bolt/latch configuration

Reversible latch and bolt

Bolt action

Two-stage travel, 10 mm per stage

Handle spindle hole

Two 8 mm square spindle holes controlling locking/unlocking separately

Faceplate ends

Square ends

Functions and interfaces of this model

The two handle spindle holes serve locking and opening separately; this is not interchangeable with an ordinary single-spindle-hole lock body. Check both drive positions on the faceplate and their corresponding handle configurations; the catalogue requires the strike plate to be ordered separately.

Using backset for compatibility checks

The catalogue records this model's backset as 50 mm. Backset is measured from the specified faceplate or door-edge reference to the operating centre. It describes a different direction from centre distance, lock-body width and door thickness; retain the original drawing's reference when measuring.

The selection checklist should also retain: backset 50 mm; Bolt/latch configuration Reversible latch and bolt; Bolt action Two-stage travel, 10 mm per stage; Handle spindle holes: two 8 mm square holes controlling locking/unlocking separately; Faceplate ends Square ends. Even for models with the same backset, compare handing, latch/bolt configuration and drive interfaces.

Checks before replacement and installation

Give the supplier the full model number 221N501, photographs of the original lock body, door handing and measured dimensions. The measurement reference in the diagram only explains what the dimension means; it cannot be used directly as a drilling template.

For electric configurations, also check power-supply and control requirements; for mechanical versions, check the strike plate, cylinder connection and range of movement.

Limitations

• This page follows the specific model row in Catalogue .42; it does not replace site installation drawings or the manufacturer's confirmation of current supply.
• The measurement diagram explains only this page's dimensional reference; it does not show the product appearance, drilling positions or complete installation dimensions.
• Confirm whether the cylinder, strike plate and accessories are included from the corresponding catalogue section and ordering configuration.

Sources

Manufacturer documents are provided in their original language.

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