Selecting the correct lock function is one of the most important steps when installing a commercial cylindrical lock. The Schlage ND Series offers several configurations designed to meet different security needs. Understanding how each function works helps ensure proper access control and safety within a building.
Below are some of the most commonly used ND Series functions.
ND70 – Classroom Lock Function
The ND70 is a classroom security function widely used in educational environments. With this configuration, the outside lever can be locked or unlocked using a key, while the inside lever always allows free exit.
This design ensures that:
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Teachers or authorized personnel can secure the room from the hallway
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Occupants can always exit safely from inside the room
Because of these features, ND70 locks are commonly installed on classroom doors and training rooms.
ND80 – Office or Entrance Function
The ND80 is designed for office environments where a balance between accessibility and security is required.
With this function:
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The outside lever can be locked or unlocked with a key
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The inside lever remains free for exit
ND80 locks are frequently used for private offices, conference rooms, and administrative areas.
ND96 – Storeroom Function
The ND96 function is designed for high-security storage areas. In this configuration, the outside lever remains locked at all times and requires a key for entry. Once the key is removed, the door automatically returns to the locked position.
This makes ND96 locks ideal for:
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Supply rooms
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Maintenance storage
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Equipment rooms
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IT server rooms
Storeroom functions help prevent unauthorized access while still allowing authorized staff to enter when necessary.
ND53 – Entry Function
The ND53 is commonly used on main entry doors or commercial entrances. It allows the outside lever to be locked or unlocked with a key, while the inside lever remains free for exit.
This configuration is ideal for:
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Commercial office entrances
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Retail back-of-house doors
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Staff entry points
Choosing the Correct Lock Function
When selecting a lock function, facility managers should consider several factors:
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Type of room or space
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Security level required
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Frequency of door usage
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Emergency egress requirements
By choosing the correct ND Series function, building owners can ensure that each door provides the right balance of security, accessibility, and safety.
Selecting the correct lock function is one of the most important decisions when installing commercial door hardware. The Schlage ND Series offers a wide variety of mechanical configurations designed to meet the security and accessibility needs of modern buildings. From classroom and office functions to storeroom and entry configurations, each option is engineered to support specific operational requirements.
Understanding how functions such as ND70 classroom locks, ND80 office locks, ND96 storeroom locks, and ND53 entry locks operate allows facility managers and installers to create a door hardware system that balances security, accessibility, and code compliance. Choosing the wrong function can lead to operational challenges, while selecting the right configuration ensures smooth access control throughout the building.
For contractors, locksmiths, and building managers looking to implement reliable commercial locks, Qualitydoor.com provides a comprehensive selection of Schlage ND Series functions, trims, and replacement parts. Their extensive inventory and technical resources make it easier to select the correct lock configuration for any commercial door application.
Ultimately, the right lock function ensures that every door in a facility performs exactly as intended, providing the appropriate level of security while maintaining safe and convenient access for occupants.