Corbin Russwin ML2052 Grade 1 Mortise Classroom Intruder Lever Lockset

Corbin Russwin ML2052-KEYED Mortise Classroom Intruder Lever Lockset Grade 1, ANSI F32, Field Reversible

Commercial-Grade Classroom Intruder Mortise Lock for High-Traffic Security Applications

The Corbin Russwin ML2052-KEYED is a Grade 1 mortise classroom intruder lever lockset from the ML2000 Series, engineered for demanding commercial, institutional, industrial, and government environments. Compliant with ANSI function F32, this lockset allows latchbolt operation by grip from either side unless the outside grip is locked by key from either side, with the inside grip always remaining free for safe egress. Constructed of heavy-gauge steel with a 1" stainless steel deadbolt and a 3/4" latchbolt, the ML2052 is designed for 1-3/4" (44mm) standard door thickness and features a field-reversible handing for flexible installation. The ML2000 Series has achieved an exceptional UL Cycle test result of 14.5 Million Cycles (Verification ID: V875753), underscoring its long-term reliability in the most demanding applications.

Professional Features & Benefits

• ANSI/BHMA Grade 1 mortise lock per A156.13 Series 1000, Operational and Security Grade 1
• UL Cycle above and beyond: 14.5 Million Cycles (Verification ID: V875753)
• Patented Quick Reversible latchbolt — reverse handing without disassembling the lock case
• Multi-function capability: 12 functions configurable from one ML2054 lockbody
• Heavy-gauge steel lockcase 5-7/8" x 4" x 15/16"; 1" stainless steel deadbolt, 1" throw
• 3/4" (19mm) throw anti-friction two-piece latchbolt requires less force to close
• Wide variety of trim designs including Muséo®, Vineyard™, Behavioral Health (BHSS/BLSS)
• Status indicator options for locked/unlocked visibility (sectional and escutcheon trim)
• Motorized Electric Latch Retraction (MELR) available for ML20900 series
• Thru-bolted trim designs for proper alignment and increased security
• Can be used with new or existing Corbin Russwin key systems; accepts most other manufacturers' cylinders
• UL/cUL listed, UL10C positive pressure; 3-hour fire door up to 4' x 10' single or 8' x 10' pair
• Ten-year mechanical warranty; five-year MELR; two-year electrical

Technical Specifications

• Grade: ANSI/BHMA A156.13 Series 1000, Operational and Security Grade 1
• Handing: Handed; quick reversible — re-handed without disassembling the lock case
• Door Thickness: 1-3/4" (44mm) standard; optional thicknesses available
• Backset: 2-3/4" (70mm)
• Lockcase: Heavy-gauge steel, 5-7/8" (149mm) x 4" (102mm) x 15/16" (24mm)
• Armored Front: Wrought brass, bronze, or stainless steel, 8" x 1-1/4"
• Latchbolt: 2-piece mechanical with anti-friction insert, 5/8" x 1" x 3/4" (19mm) throw
• Auxiliary Latchbolt: 9/16" (14mm) effective throw; deadlocking
• Deadbolt: One-piece stainless steel, 19/32" x 1-1/4" x 1" (25mm) throw
• Strike: Wrought brass, bronze, or stainless steel, ANSI straight lip, 4-7/8" x 1-1/4" x 1-1/8" lip to center
• Cylinder: Brass, 6-pin L4 keyway, 0-bitted standard
• Spacing: C. to c. knob/lever to cylinder: 3-5/8" (92mm); knob/lever to thumbturn: 2-7/16" (62mm)
• Certifications: ANSI/BHMA A156.13 Grade 1; UL/cUL UL10C 3-hour positive pressure; ADA A117.1; California State Fire Marshal; Windstorm/Hurricane certified
• Warranty: Ten-year mechanical; five-year MELR; two-year electrical

Professional Applications

• K-12 Schools and Educational Facilities
• College and University Campus Buildings
• Healthcare Institutions and Hospitals
• Commercial Office Buildings
• Government and Municipal Buildings
• Industrial and Warehouse Facilities
• Hotels and Multi-Tenant Residential Properties

Tamper-Resistant Design

The ML2000VR (Vandal Resistant) Series option features stainless steel escutcheons with tapered edges and Torx® pin tamper-resistant screws, providing a vandal-resistant barrier for high-risk environments. When paired with Corbin Russwin patented high-security Pyramid or Access 3® cylinders, any door can become a formidable barrier to intruders.

Why Choose Corbin Russwin Quality?

Corbin Russwin ML2000 Series mortise locks deliver professional-grade reliability with heavy-gauge steel construction and a 1" stainless steel deadbolt, rated for an exceptional 14.5 Million Cycles in UL Cycle testing (Verification ID: V875753). Backed by a 10 Year Limited warranty and compliant with Grade 1 ANSI/BHMA standards, the ML2052 is engineered for demanding commercial applications where dependable classroom security and long-term performance are essential.