Dormakaba r8148b-26d-41 Pushbutton Mortise Lock Deadbolt

Product Description

The DORMAKABA r8148b-26d-41 is a Simplex mechanical pushbutton mortise lock with integrated deadbolt, designed for commercial door hardware applications. This lock operates without batteries or electronics — the pushbutton combination mechanism is fully mechanical, eliminating power dependency at the door. A key override cylinder accommodates Small Format Interchangeable Core (SFIC) cylinders in Best and equivalent configurations (6 or 7-pin lengths). The core is sold separately and must be sourced to match the facility keying system. Installation is performed by licensed locksmiths or commercial door hardware specialists.

This lock is suited for commercial and institutional environments where access control at interior or secured doors is required without reliance on electronic systems. Typical applications include offices, storage rooms, stairwells, and utility areas where a combination-entry deadbolt provides reliable standalone security. The SFIC key override allows master-key integration into existing Best-compatible keying systems, making it appropriate for facilities already operating Best 6 or 7-pin core infrastructure. Core is not included and must be ordered separately.

Key Features

• Fully mechanical Simplex pushbutton operation — no batteries, no wiring required
• Integrated deadbolt provides positive locking without a separate bolt component
• SFIC key override compatible with Best and equivalent 6 or 7-pin length cores
• Mortise body design for installation in standard commercial mortise door preparations
• Interchangeable core sold separately, allowing field keying to existing systems

Compatibility

Compatible with Best SFIC and equivalent interchangeable cores in 6 or 7-pin lengths; core is sold separately. Designed for standard commercial mortise door preparations.

Installation Notes

Installation should be performed by a licensed locksmith or qualified commercial door hardware technician familiar with mortise lock preparation and SFIC core seating procedures. Verify the door thickness and mortise pocket dimensions match the lock body before installation. Key override core must be installed and tested before the door is returned to service. Follow all applicable building and fire egress codes when installing access-controlled hardware on required egress paths.

Technical Specifications

• Lock Type: Simplex Mechanical Pushbutton Mortise Lock with Deadbolt
• Key Override: SFIC Best and Equivalents (6 or 7-pin)
• Core Included: No — sold separately
• Finish: 26D (Satin Chrome)

Standard Information

• Brand: DORMAKABA
• Manufacturer Part Number: r8148b-26d-41