Quick Answer

The Schlage NDE is a Grade 1 wireless cylindrical lock that integrates an RFID/Bluetooth credential reader, motorized latch chassis, door position sensor, and access control interface into a standard cylindrical lock form factor. When servicing one, here are the parts ordered most often:

• Inside escutcheon assembly with PCBA: 47278749 (the primary NDEB component, also used for NDE80 upgrades)
• Motorized chassis: N223-007
• Battery holder kit: N223-044
• Outside spring cage: N523-218
• Inside spring cage (post-Feb 2017 devices): N523-221
• Main wire harness: N223-019
• Mounting kit: N223-049
• Battery cover: N623-007

Critical note before ordering: After replacing the inside escutcheon assembly or the motorized chassis on any NDEB device, the lock must be re-commissioned through ENGAGE. Skipping this step produces a lock that will not connect to the access control system. Also confirm whether your device is a pre-February 2017 unit before ordering spring cages, as spring cage part numbers differ by manufacture date.

What the Schlage NDE Wireless Lock Is and Why It Requires Different Parts

The Schlage NDE is not a mechanical lock with an electronic add-on. It is a purpose-built wireless electronic access control device in a cylindrical lock form factor. Identifying this distinction matters because NDE parts are not compatible with the standard Schlage ND Series mechanical cylindrical lock, even though both products mount on the same door preparation and use similar lever hardware.

The NDE combines several systems into a single unit: a Grade 1 cylindrical lock chassis, an RF credential reader, a motorized latch retraction assembly, a door position sensor, a Bluetooth module for ENGAGE communication, and a battery power system. Each of those systems has its own serviceable components. When one fails, you need to identify the right assembly before ordering, because the NDE's internal architecture is substantially different from any mechanical cylindrical lock.

The NDE product line spans three generations. The NDE80 was the original model. It has been discontinued and NDE80-specific parts are no longer available from the manufacturer. The NDEB is the current production standard and is the model you are most likely to encounter on doors installed after 2014. The NDEBSi adds HID secure sector credential compatibility with a visual indicator button. If you have an NDE80 in the field, Security Parts carries the NDEB conversion kit to bring it to current specification.

For context on how the NDE fits into the broader Schlage product lineup and how it differs from the mechanical ND Series, see the Schlage ND Series cylindrical lock parts guide. For a broader look at how wireless locks integrate with commercial door access control systems, see the access control integration guide.

Schlage NDE Wireless Lock Parts: Every Assembly and Component

The NDE parts catalog divides into six functional assemblies. Understanding which assembly you are servicing before ordering prevents wrong-part returns and callback visits. Security Parts stocks NDE components across all six of these categories.

Inside Escutcheon Assembly: The Core Electronic Module

Schlage 47278749 NDEB inside escutcheon assembly with main PCBA. View product page and order.

The 47278749 NDEB inside escutcheon assembly is the single most important component in the NDE parts catalog. It contains the inside escutcheon housing, the RF window, the door position sensor, the main PCB module with Bluetooth radio, and the inside label. When the lock fails to communicate with ENGAGE, fails to read credentials, or produces electrical fault codes, this assembly is the first component to evaluate.

The 47278749 also serves as the NDE80-to-NDEB upgrade kit. If you have an NDE80 in the field, ordering this assembly and following the NDEB retrofit installation instructions brings the unit to the current NDEB specification. After installation, the device must be deleted from ENGAGE, factory default reset, and re-commissioned. This step is required without exception.

The inside escutcheon assembly is also the component that determines whether the lock can support the NDEBSi credential format. If an NDEBSi-capable lock is needed, a new complete lock unit must be ordered. Upgrading an existing NDEB to NDEBSi through parts replacement is not possible.

Motorized Chassis: The Mechanical-Electronic Interface

Schlage NDE N223-007 motorized chassis assembly. View product page and order.

The N223-007 motorized chassis assembly is what translates the electronic credential signal into physical latch retraction. When a valid credential is presented, the motorized chassis retracts the latch bolt. When an invalid credential is presented, or when no signal is received, the chassis holds the latch in the extended position.

The most common symptom of a failing motorized chassis is a latch that retracts slowly or inconsistently, or a device that produces grinding sounds during a valid credential event. Physical impacts and door abuse can damage the chassis alignment. High-cycle environments such as hospital corridors or university residence halls also produce accelerated wear on this component.

Replacing the motorized chassis requires ENGAGE re-commissioning. The replacement chassis does not inherit the previous device's credential programming. Delete the device from ENGAGE, factory reset the chassis, and re-commission before returning the door to service.

Battery System Components

Schlage NDE N223-044 battery holder kit. View product page and order.

The NDE is battery-powered. The battery system involves three serviceable components: the battery holder kit, the battery cover, and the inside baseplate that anchors both.

• N223-044 Battery Holder Kit: The primary battery housing assembly. Replaced during routine maintenance cycles when battery contacts corrode or when the physical holder cracks from door cycling stress. The kit contains the holder and retaining hardware.
• N623-007 Inside Battery Cover: The cover plate that protects the battery compartment. Replaced when damaged from repeated access or when the battery cover screw strips. Order the battery cover screw separately using the N223-049 mounting kit.
• N623-000 Inside Baseplate: The mounting plate behind the inside escutcheon that anchors the battery and spring cage components to the door. Replaced when the baseplate warps from door stress or when mounting threads strip.

Spring Cages: Confirm Manufacture Date Before Ordering

Schlage NDE N523-218 outside spring cage and lever catch assembly. View product page and order.

Spring cage ordering on the NDE requires one piece of information before you place the order: the manufacture date of the device. Devices manufactured after February 1, 2017 use a different inside spring cage than those manufactured before that date. Using the wrong spring cage produces a lever that will not seat correctly or will not hold under use.

• N523-218 Outside Spring Cage and Lever Catch Assembly: Applies to all NDE devices regardless of manufacture date. The outside spring cage is universal. Replace when the outside lever droops, fails to return to position after each use, or when the catch mechanism no longer holds the lever in place.
• N523-221 Inside Spring Cage and Lever Catch Assembly: Applies to devices manufactured after February 1, 2017. Confirm the manufacture date on the label inside the device before ordering. If your device was manufactured before that date, contact Security Parts at 845-935-0301 to confirm the correct alternative spring cage for your specific unit.

For full-size interchangeable core configurations that use specific non-Schlage IC cores, the outside spring cage changes to N523-224. Confirm with the NDE service manual whether N523-224 applies to your core specification. All other cylinder configurations use N523-218 for the outside position.

Wire Harness, Reader PCBA, and Electronic Accessories

The electronic components between the credential reader and the chassis are the second most common source of NDE service calls after the inside escutcheon assembly. These include:

• N223-019 Main Wire Harness: Connects the inside escutcheon PCBA to the motorized chassis. When physical or environmental damage breaks a wire, credential reads produce no mechanical response. Inspect the harness routing before replacing the escutcheon or chassis, since a harness fault can mimic either failure.
• N223-046 Reader PCBA: The credential reading board inside the outside escutcheon. Replaced when the lock stops reading credentials altogether but the ENGAGE connection remains active and the motor still functions on a manual test.
• N223-045 Outside Escutcheon Subassembly: The complete outside housing assembly without the reader PCBA. The escutcheon without reader is specified for installations where the credential reader is not required but the physical outside trim must be replaced. Specify finish when ordering.
• N623-030 Motor Assembly: The motor sub-assembly within the motorized chassis. In some service scenarios the motor itself fails while the chassis body remains intact. Confirm with the manufacturer service manual whether your specific failure mode calls for the motor assembly alone or the full motorized chassis N223-007.

Mounting Hardware and Installation Tools

Schlage 40-286 Universal Clamp for NDE/NDEB door preparation template. View product page and order.

Any installation that involves the full inside escutcheon replacement or an NDE80 upgrade requires the correct installation tools. These are not optional:

• 40-286 Universal Clamp: Required for use with the NDEB door preparation template. The template cannot be used accurately without the clamp. Works across the NDE, LE, AD, and CO Series installation templates.
• 47286225 NDEB Door Preparation Template: Required for new door prep and for NDE80-to-NDEB upgrades, which require additional door position sensor holes that the original NDE80 installation did not create. Must be used with the 40-286 clamp.
• 40-292 Door Position Sensor Fixture and Mounting Hardware: Required for accurate door position sensor (DPS) hole placement. The 47286225 template is required to use the 40-292 fixture.
• N223-049 Mounting Kit Screw: The standard mounting hardware kit for NDE installations. Contains combination screws, mounting screws, machine screws, battery cover screws, pan head screws, and a pin wrench.

Cylinder and Tailpiece Options for the Schlage NDE

The NDE supports three cylinder configurations. Each uses a different tailpiece. When ordering levers that include a cylinder, you must specify which core configuration is required, because each lever comes factory-configured for a specific cylinder type.

If you are uncertain which cylinder type is installed in your specific NDE device, the core type is identified on the label inside the battery compartment. For guidance on how master key systems and interchangeable core cylinder programs integrate with commercial door hardware at the facility level, see the master key system design guide and the Schlage key systems guide.

NDE Wireless Lock Parts Quick Reference Table

Ordering Schlage NDE Wireless Lock Parts: What to Confirm Before You Call

NDE parts ordering has more variables than mechanical lock parts because the electronic configuration affects which components are compatible. Confirm these five items before placing any order:

1. NDE80 or NDEB? Look for a label inside the battery compartment. The model designation tells you which inside escutcheon assembly applies and whether an upgrade kit is needed.
2. Manufacture date. The date is stamped on the label inside the battery compartment. This determines which inside spring cage applies. Pre- and post-February 2017 devices use different spring cage part numbers.
3. Cylinder type. KIL, FSIC, or SFIC. This determines which tailpiece applies and which lever part numbers are valid for your configuration.
4. Finish. Specify finish for levers, escutcheons, strikes, and latches. Not specifying finish results in a shipment in the manufacturer's default finish, which may not match the door hardware.
5. ENGAGE version. Before replacing the inside escutcheon or motorized chassis, confirm you have access to the current ENGAGE app for re-commissioning. Part replacement without re-commissioning produces a non-functional installation.

Security Parts stocks Schlage NDE wireless lock parts with same-day shipping on available components. Pre-order compatibility support is available at 845-935-0301. For OEM versus aftermarket part considerations on electronic access control hardware, see the OEM vs aftermarket commercial door hardware guide.

Schlage NDE in Context: How It Differs from Other Schlage Cylindrical Locks

The NDE shares its door preparation (the 61 Series prep with minor modifications) and lever form factor with the mechanical ND Series and the ALX Series. This means it can be installed on the same door as a mechanical lock replacement with minimal door modification. However, the internal components are completely different and do not cross between the product lines.

The mechanical Schlage ND Series cylindrical lock parts guide covers the ND, NDT, and NDB mechanical cylindrical line. If you are servicing a cylindrical lock that does not have a Bluetooth indicator or battery compartment on the inside trim, you have a mechanical ND Series device, not an NDE. The Schlage ALX Series guide covers the ALX10 through ALX80 mechanical cylindrical line, which uses similar lever hardware but entirely different internal mechanisms.

For facilities managing a mix of NDE wireless locks and other access control hardware, the access control integration guide covers how ENGAGE-platform devices communicate with third-party access control systems, credential formats, and door position sensor wiring. Understanding the integration architecture before servicing an NDE device prevents credential programming loss and unnecessary service calls.

The NDE is commonly specified in the same facilities as electric strikes and electrified mortise locks. For electric strike parts, see the electric strike parts guide. For function code selection guidance that applies across all commercial cylindrical lock types, see the commercial lock function codes guide.

The NDE is particularly common in healthcare and government facilities. For door hardware specification requirements in those environments, see the healthcare door hardware guide and the government buildings door hardware guide. For a complete picture of ANSI/BHMA Grade 1 certification requirements that the NDE meets, see the ANSI/BHMA door hardware standards guide.

About the Author

This guide was written by the Security Parts team, a commercial door hardware specialist serving locksmiths, facility managers, general contractors, and access control integrators since 2001. Security Parts stocks OEM and aftermarket replacement components for Schlage and other leading commercial hardware manufacturers, with same-day shipping on stocked items and pre-order parts identification support at 845-935-0301.