ON-03 Double Safety Elevator Door Lock

ON-03 is a double safety door lock model for elevator door systems. Review the lock body, operating lever and fixing arrangement of the existing door mechanism when assessing suitability for maintenance or replacement.

The ON-03 model shows a metal body and a motion transmission lever arrangement. Compare the body position on the door and the lever relationship with the mating part against the existing lock dimensions.

Application and Product Selection

An elevator door lock is assessed together with the landing door locking arrangement and the associated door mechanism. During replacement, compare the lock body position, motion transmission components and the arrangement of the mating part on the door. Models within the same product group may have different fixings and lever geometries, so selection should use the specific model code.

Existing mounting orientation, body dimensions, fixing holes, movement travel and mating part position are central selection criteria. Verify electrical connections, contact arrangement and operating characteristics against current technical documentation. The double safety model designation alone does not establish a particular certificate, standard or compatibility with every type of door.

A product should not be selected solely from a photograph or a similar model name. Exact dimensions, connection arrangements, operating conditions and system compatibility should be assessed against current technical documentation. Images show the general product form and do not replace a scaled manufacturing drawing. Check the application requirements together with the variant to be ordered.

Installation Planning and Maintenance

Before replacement, record the position of the existing component, its fixing points, interacting parts and maintenance access. Installation planning should cover dimensional comparison, suitable fasteners and the way components operate together. Installation and commissioning checks should be carried out by qualified personnel in accordance with the product instructions and the technical requirements of the project.

Maintenance assessment should examine mechanism movement, fixing condition, the relationship between the lever and mating part, and signs of wear. Plan adjustment, lubrication and functional checks according to product instructions. Confirm that the replacement lock operates with the other components of the existing door system through commissioning checks and maintenance records.

Keep the product code, selected variant, quantity, installation position and technical documents in the project file for maintenance and future sourcing. Reference photographs and dimensional records of the replaced component can also be included. This provides a traceable basis for selecting components for subsequent modernization work on other elevators with the same arrangement.

Modernization Project and Quotation

When requesting a product assessment or quotation from Katrelift, share the model code, required quantity, a photograph of the existing component and the relevant fixing dimensions. Indicating whether the project concerns a new installation, maintenance or modernization helps identify the appropriate variant and the associated components that should be considered together.