Fermator K200 K300 Door Lock Roller 33*10*8mm

Lock Pickup Roller for Elevator Landing Door Systems

Product Overview

The Fermator K200 K300 Door Lock Roller 33*10*8mm is a lock pickup roller used in elevator landing door lock systems. It is mainly installed inside the door lock mechanism where smooth mechanical engagement is required during door unlocking and locking operation.

In maintenance projects across regions such as Spain and Turkey, this type of roller is commonly replaced after long-term operation due to continuous contact with the lock pickup mechanism. Although compact in size, the roller directly affects lock engagement smoothness and door unlocking consistency.

The 33mm outer diameter and 8mm inner structure are commonly associated with K200 and K300 landing door lock systems.

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Function in Door Lock System

The lock roller mainly supports:

• smooth mechanical pickup movement
• stable engagement with the lock mechanism
• reduction of friction during unlocking
• consistent movement inside the landing door lock assembly

Stable rolling contact helps maintain reliable lock operation during repeated door cycles.

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Difference from Standard Door Rollers

Compared with ordinary guide rollers:

• Door Guide Roller → supports door movement
• Door Lock Roller → supports lock engagement movement

This type of roller is specifically associated with the lock pickup mechanism rather than door panel guidance.

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Mechanical Characteristics

The 33*10*8mm configuration is typically associated with:

• compact lock roller structure
• stable pickup movement
• suitability for K200 / K300 lock assemblies
• repeated mechanical contact operation

Correct dimensions are important for maintaining smooth lock engagement.

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Application Context

This component is commonly used in:

• Fermator K200 landing door locks
• Fermator K300 landing door locks
• elevator landing door safety systems
• maintenance and modernization projects

In elevators with frequent operation cycles, lock rollers are considered wear-related mechanical components.

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Common Maintenance Situations

Technicians may inspect or replace the roller when:

• unlocking movement becomes rough
• lock engagement becomes inconsistent
• abnormal friction noise appears
• visible roller wear affects operation

Replacing worn rollers often improves lock pickup smoothness and operational reliability.

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Practical Notes

From a maintenance perspective:

• roller wear directly affects lock movement quality
• proper alignment inside the lock mechanism is important
• incorrect dimensions may affect lock engagement timing

Even small lock rollers can influence overall landing door performance.

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Frequently Asked Questions

What is the Fermator 33*10*8mm lock roller used for?
It is used inside elevator landing door lock systems to support lock pickup movement.

Is it the same as a guide roller?
No. It is specifically designed for lock mechanism operation.

When should it be replaced?
When lock movement becomes rough, noisy, or inconsistent during operation.