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Mortise Cylinders
The Mortise Cylinder line offers a wide range of options, providing versatility to accommodate various applications. Available styles include keyed, turn knob, and dummy cylinders.
Frequently Asked Questions
What is a mortise cylinder?
A mortise cylinder is a threaded key cylinder designed to screw into mortise locks, deadlatches, and some exit devices. Unlike rim cylinders, which mount with a back plate, mortise cylinders fit flush inside the lock body. At National Lock Supply, we carry mortise cylinders in multiple lengths, finishes, and keyways.
How do mortise cylinders compare to rim cylinders?
Mortise cylinders are used with mortise locks and deadlatches, while rim cylinders are paired with rim locks and exit devices. Mortise cylinders provide a more integrated look and stronger attachment inside the door.
What sizes are available?
Standard lengths include 1-1/8″, 1-1/4″, and 1-1/2″, chosen based on door thickness and hardware.
What keyways are offered?
Most are available in SC1, KW1, and restricted keyways for commercial master key systems.
Where are mortise cylinders used?
In mortise locksets, storefront doors, aluminum door deadlatches, and commercial exit hardware.
Are mortise cylinders rekeyable?
Yes. Locksmiths can rekey mortise cylinders to match existing systems.
Are mortise cylinders UL certified?
Yes, many are UL-listed for fire-rated doors when paired with mortise locks.
What finishes are available?
Satin Chrome, Polished Brass, Oil-Rubbed Bronze, and Dark Bronze are common.
Can mortise cylinders be keyed alike or master keyed?
Yes. They can be ordered keyed alike or integrated into master key systems.
Why buy mortise cylinders from National Lock Supply?
We stock high-security mortise cylinders in all lengths and finishes, with expert guidance to match your mortise locks and deadlatches.