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Schlage ND50-BD-TLR Cylindrical Entrance/Office Lock, Tubular Lever, SFIC Prep Less Core, 2-3/4 Inch Backset, 4-7/8 Inch Strike, Grade 1, Non Handed
The Schlage ND50-BD-TLR Cylindrical Entrance/Office Lock is a heavy-duty Grade 1 lock built for commercial openings that need reliable entrance/office function and long service life. This cylindrical lock features the Tubular Lever design, SFIC prep less core construction, a 2-3/4 inch backset, and a 4-7/8 inch strike for compatibility with standard commercial door preparations. Its non handed design simplifies installation and inventory management, while the ND Series platform is engineered for demanding use in schools, offices, healthcare facilities, and other high-traffic buildings where strength, security, and dependable performance matter.
Features
- ND50 entrance/office function provides keyed access control for commercial doors requiring secure entry and convenient operation.
- Cylindrical lock design supports standard bored door preparation for straightforward installation and retrofit work.
- Tubular Lever trim offers a familiar lever style suited for institutional and commercial applications.
- SFIC prep less core configuration is prepared for a small format interchangeable core and is supplied without the core.
- 2-3/4 inch backset is included for doors prepared for the longer commercial backset dimension.
- 4-7/8 inch strike provides the larger strike format used on many commercial frame applications.
- Grade 1 construction meets the highest ANSI/BHMA grade for cylindrical locks in demanding environments.
- Non handed design allows the lock to be used on either right-hand or left-hand doors.
Functional Details
The ND50 entrance/office function is commonly used on doors that need to remain locked from the outside while allowing free egress from the inside. This makes it a practical choice for offices, main entrances, and similar commercial spaces where keyed exterior access and safe interior exit are both required.
- Outside lever locked by push button inside. Turning inside lever or closing door releases button. Key outside retracts latchbolt when outside lever is locked.
- Inside lever always unlocked.
Included Components
This lock is supplied as an SFIC prep less core unit, meaning the lock is prepared to accept a small format interchangeable core but does not include the core itself. The configuration includes the cylindrical lockbody, Tubular Lever trim, 2-3/4 inch backset latch, and 4-7/8 inch strike.
| Manufacturer | Schlage |
| Series | ND Series |
| Model | ND50-BD-TLR |
| Product Type | Cylindrical Entrance/Office Lock |
| Lever Design | Tubular Lever |
| Core Preparation | SFIC Prep Less Core |
| Backset | 2-3/4 Inch |
| Strike | 4-7/8 Inch Strike |
| Handing | Non Handed |
| Grade | Grade 1 |
| SKU | ND50-BD-TLR |
| ANSI Number | F109 |
| UL Listing Type | UL listed for 3-hour fire door |
| BAA Qualified | No |
| Origin | Made in Mexico with USA and global components |
| Unit of Measure | Each |
| Limited Warranty | 10 Year Mechanical Warranty and 3 Year Electro Mechanical Warranty |
| Lock Function | ND50 Entrance/Office |
| ANSI Function Number | F109 |
| Lock Type | Cylindrical |
| Lever Style | TLR Tubular Lever |
| Core Format | SFIC Prep Less Core |
| Backset Dimension | 2-3/4 Inch |
| Strike Dimension | 4-7/8 Inch |
| Handing | Non Handed |
| Security Grade | ANSI/BHMA A156.2 Series 4000 Grade 1 |
| Fire Rating | 3 Hour |
| Door Thickness Range | 1-3/8 Inch to 2-1/8 Inch |
| Latchbolt Throw | 1/2 Inch |
| Auxiliary Latchbolt | Deadlocking |
| Lever Rotation | 29 Degrees |
| Cycle Testing | 3,100,000 cycles |












