What is a cylindrical lock?

Cylindrical Locks: a bored lockset whose latch or bolt locking mechanism is contained in the portion installed through the cross-bore

  • Medium, high to extra heavy duty
  • Commercial, multi-family and institutional applications
  • Pros - Heavy duty, unlimited cylinder options
  • Cons - Large rose (larger footprint on face of door), limited lever designs

Cylindrical locks with levers usually require a spring cage to lift the lever and keep it horizontal.  These spring cages lead to a bigger rose (circular, finished plate against the door) – typically around 3.5 inches in diameter.  Knob designs do not require this extra spring force and these roses usually have a diameter around 2.5 inches.

Schlage Commercial cylindrical locks

·         Heavy Duty (high use, high abuse applications - educational facilities, hospitals, etc.) 

o    D-Series – knob style (ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 1, UL Listed for 3-hour fire door Discontinued 2020

o    ND-Series – lever style (ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 1, UL Listed for 3-hour fire door)

·         Standard Duty

o   A-Series - knob style (ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 2, UL Listed for 3-hour fire door)

o   AL-Series – lever style (ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 2, UL Listed for 3-hour fire door) Discontinued 2021

o ALX Series – lever style (ANSI/BHMA Certified A156.2-2003, Series 4000, Grade 2, UL Listed for 3-hour fire door) 

Falcon cylindrical locks

·         Heavy Duty (high use, high abuse applications - educational facilities, hospitals, etc.) 

o    X-Series – knob style (ANSI A156.2, Series 4000, Grade 1, UL Listed for 3-Hour fire door) Discontinued 2024

o    T-Series – lever style (ANSI A156.2, Series 4000, Grade 1, UL Listed for 3-Hour fire door)

·         Standard Duty

o    W-Series – knob and lever style (ANSI A156.2, Series 4000, Grade 2, UL Listed for 3-Hour fire door)

o    B-Series – lever style (ANSI A156.2, Series 4000, Grade 2, UL Listed for 3-Hour fire door)


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