About this item
The Schlage Locknetics GF3000 DSMMBS is a high-strength concealed electromagnetic shear lock from the GF3000 Series, the mortise-mounted shear lock platform now sold under the Schlage brand following Allegion's acquisition of Locknetics. Buyers will see this product searched as "Schlage GF3000," "Locknetics GF3000," or simply "GF3000" because the legacy Locknetics brand attribution is still embedded in the spec-writer market. The mechanical product is unchanged. The full part designation breaks down as: GF3000 (electromagnetic shear lock 1500 lbs holding force mortise series), DSMMBS (Double Side Monitor with Magnetic Bond Sensor configuration). Designed for concealed installation in the door header, the GF3000 is invisible when the door is closed and provides bidirectional shear hold force ideal for swing doors, vestibule pairs, double-egress openings, and architectural glass storefronts where surface-mounted maglocks are visually unacceptable. SKU GF3000-DSMMBS. In stock under Schlage Maglocks & Acc. within Magnetic Locks.
Shear Lock vs Standard Maglock: Why It Matters
A standard electromagnetic lock (maglock) holds the door closed by face-to-face magnetic attraction between an electromagnet on the frame and an armature plate on the door. Pull force is high (typically 600 to 1500 lbs) but the lock only resists pull-direction force; shear-direction force can defeat the seal. A shear lock is fundamentally different. Interlocking teeth and pin geometry engage between the magnet body and the armature when energized, creating mechanical interlock that resists force in both shear directions. That bidirectional hold is the reason shear locks get specified on swing doors, double-egress vestibules, double-door pairs, and high-wind-load applications where standard maglocks cannot meet the spec. The GF3000 delivers 1500 lbs of holding force in this concealed shear configuration.
What "DSMMBS" Means
The DSMMBS suffix on this configuration indicates Double Side, Monitored, Magnetic Bond Sensor. Double Side: the shear lock works on a pair of doors operating in both directions (bidirectional swing). Monitored: the lock includes a Door Position Switch (DPS) that signals open/closed state to the access control panel, which is critical for forced-door alarm and secure-after-hours monitoring. Magnetic Bond Sensor (MBS): the lock includes an internal sensor that confirms the magnet has actually achieved full bond with the armature, distinguishing between "powered on" and "actually locked." MBS is the difference between the access control system thinking the door is secured and knowing it is secured. Specify DSMMBS on any opening tied into a building access control system where forced-entry detection or bond-failure detection is required.
Specifications
Holding force: 1500 lbs (6.7 kN). Configuration: electromagnetic shear lock, double-side bidirectional hold. Mounting: concealed mortise mount in door header, invisible when door closed. Door types: single doors, pairs, double-egress, swing doors, vestibule applications. Door materials: hollow metal, aluminum, wood, and architectural glass with appropriate brackets. Voltage: 12VDC and 24VDC field-selectable (verify on shipped unit). Current: low standby current. Fail mode: fail-safe (door unlocks on power loss for life-safety egress). Built-in features: Door Position Switch (DPS), Magnetic Bond Sensor (MBS). Operating temperature: standard commercial range. Mounting hardware: included for hollow metal frame; specialty brackets available for glass and aluminum applications. Schlage warranty.
Where to Specify the GF3000 DSMMBS
High-end commercial vestibule pairs, executive office double doors, healthcare reception double-egress, hospital double-door corridor applications, courthouse non-public double doors, government building secure-zone vestibules, multi-tenant building lobby vestibules, hotel lobby double doors, school administrative entry vestibules, behavioral health corridor double doors, architectural glass storefronts where surface-mounted maglocks are visually unacceptable, and any commercial opening with bidirectional swing requirement that needs concealed access-controlled holding force above what a standard surface maglock can deliver.
Where the GF3000 Sits in the Schlage Maglock Catalog
The GF3000 is the shear-lock specialty SKU in Schlage's commercial electromagnetic catalog. For surface-mounted standard pull-force maglocks at lower hold ratings, see Schlage M420/M422 Electromagnetic Lock 500 LB Hold Force for indoor low-traffic applications, Schlage M450/M452 Electromagnetic Lock 1000 LB Hold Force for standard commercial doors, or Schlage M490/M492 Electromagnetic Lock 1500 LB Hold Force for high-security surface-mount perimeter. For Schlage maglock accessories, brackets, and power supplies, see Schlage Acc..
Where This Sits in the Site Catalog
The GF3000 DSMMBS lives under Schlage Maglocks & Acc. within Magnetic Locks. For competing electromagnetic shear lock platforms, see Securitron Maglocks & Acc. (the Securitron SAM and SAM2-24 shear lock series), Rofu 8000 Electromagnetic Shear Lock, and SDC Electromagnetic Locks.
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