Dormakaba Simplex R8148B-26D Mortise Lock - RH - Best IC - Satin Chrome

The Dormakaba Simplex R8148B-26D is the right-hand swing variant within the Simplex 8100 Series mechanical pushbutton mortise lock family, configured with Best small-format IC core prep and 26D Satin Chrome finish. Heavy-duty mortise housing with a cast front, fixed ADA-compliant lever trim, vandal-resistant solid metal pushbuttons, and a 3/4" two-piece anti-friction latch paired with a 1" deadbolt for double-locking security. Single user code, programmed at the keypad without removing the lock from the door. Key override via Best, Arrow, or Falcon small-format IC core (sold separately, with a combinated core upgrade option available at checkout). Passage option allows free access without code entry, lockout option disables code entry entirely so only the key override works. Factory-handed for right-hand swing doors (not field reversible). Door thickness 1-3/4" to 2-1/4". UL/ULC 3-hour fire rated for A-label doors. 

About Dormakaba and the Simplex 8100 Series

Dormakaba was formed in 2015 when Dorma (German door hardware) merged with Kaba (Swiss security technology), bringing the Simplex pushbutton lock line under one corporate roof. Simplex itself has been the industry-standard mechanical pushbutton lock platform in North America for decades, originally manufactured by Kaba Access Control. The Simplex 8100 Series is the heaviest-duty mortise variant in the Simplex lineup, positioned for commercial and institutional applications where mortise prep is already specified, where mechanical (battery-free, wire-free) access control is required, and where the security of a mortise lock plus optional deadbolt is preferred over cylindrical platforms like the lighter-duty Simplex 1000 Series knob lock or Simplex 5000 Series lever lock. Common applications include school administration offices, federal facilities (where electronic access control is restricted), data center perimeter doors, telecommunications equipment rooms, utility meter rooms, and any door where reliability without batteries or wiring is non-negotiable. For the full Simplex 8100 Series family across all hands and key override options, see the Simplex 8100 Mortise Lock category, or browse the 8100 (B) Best Core variants specifically.

Simplex 8100 Series Family Decode (Hand and Function Variants)

The Simplex 8100 model naming packs hand designation, function, and key override into a compact code:

• R8148B (this product) Right-Hand swing, with deadbolt, Best IC core prep

• L8148B Left-Hand swing, with deadbolt, Best IC

• LR8148B Left-Hand Reverse swing, with deadbolt, Best IC

• RR8148B Right-Hand Reverse swing, with deadbolt, Best IC

• R8146B Right-Hand, no deadbolt, Best IC

• L8146B / LR8146B / RR8146B Left-Hand, Left-Hand Reverse, and Right-Hand Reverse versions of the no-deadbolt variant

The 8146 vs 8148 distinction is the deadbolt: 8146 = anti-friction latch only (single locking point), 8148 = anti-friction latch plus 1" deadbolt (double locking, this product). For Corbin Russwin keyway compatibility instead of Best, specify the C variant (L8146C Corbin Russwin). Other key override variants in the broader 8100 catalog include the Schlage and Sargent keyway preps. For broader Simplex platform options outside the mortise line, see the Simplex 5000 Series Lever Lock, Simplex L1000 Series Lever Lock, or Simplex 1000 Series Knob Lock.

R8148B-26D Specifications

• Function: mechanical pushbutton mortise lock with key override and 1" deadbolt

• Series: Simplex 8100 Series mortise platform

• Hand: Right-Hand (RH) swing, factory-handed, not field reversible

• Code: single access code (one code for all users), programmable at keypad without removing lock from door

• Pushbuttons: 5 vandal-resistant solid metal buttons (combinations from 1 to 5 button entry sequences)

• Lock housing: heavy-duty mortise lock with cast front housing

• Trim: unified trim plate, fixed ADA-compliant levers

• Locking: 3/4" (19mm) two-piece anti-friction latch + 1" (25mm) deadbolt

• Key override: Best small-format IC core prep, accepts Best, Arrow, or Falcon SFIC cores (core sold separately, or order with combinated IC core upgrade at checkout)

• Passage option: thumbturn-or-key activated from inside, allows free latch operation without code entry

• Lockout option: disabled code entry entirely so only key override works (useful for after-hours secure modes)

• Door thickness: 1-3/4" (44mm) to 2-1/4" (57mm)

• Minimum stile: 5" (127mm) recommended

• Weather resistance: highly weather resistant (suitable for exterior commercial doors with overhead protection)

• Fire rating: UL/ULC listed for 3-hour A-label fire doors

• Compliance: meets ADA (Americans with Disabilities Act)

• Standard finishes: 26D Satin Chrome (626, this listing), 05 Antique Brass (609)

• Optional finishes: 03 Bright Brass (605), 026 Bright Chrome (625)

• Warranty: 3-year limited

• SKU: R8148B-26D-41

• Alternate model strings: R8148B26D, R8148BUS26D, KAA1398

When to Specify the R8148B vs Other 8100 Variants

This exact configuration is the right call when four conditions are met: the door swings right-hand (hinges on the right when viewed from the outside, opens away from you), the door schedule requires a deadbolt for double-locking, the existing or planned key override system uses Best small-format IC cores, and 26D Satin Chrome is the specified finish. Get any of the four wrong and you'll order the wrong SKU. Right-hand vs left-hand can't be field-reversed on the 8100 platform (factory-handed only), so confirm hand before ordering. If your door has a reverse bevel (door swings into the building from outside), specify the RR (right-hand reverse) variant instead. If your facility uses Corbin Russwin keyways instead of Best, the C-suffix variant is the correct choice. If the application doesn't need a deadbolt (interior-only opening, no perimeter security requirement), the 8146 variants are the right call. For double-occupancy openings or any scenario where multiple unique codes are required, the Simplex 8100 platform doesn't support that - step up to an electronic platform like the Alarm Lock Trilogy or Schlage AD/CO Series instead.