Lesson 9: Storefront Locks - Part 2

Mortise Cylinder

Most storefront locks are a combination of mortise cylinder and Adams Rite. A mortise cylinder is a pin and tumbler lock in a tubular housing. The mortise cylinder is threaded into the Adams Rite. The Adams Rite contains the bolt. When a key turns the cylinder the cam draws the bolt.

Mortise Cylinder: The mortise cylinder is a pin and tumbler locking mechanism. This contains pins, springs, keyway and cam. The housing is threaded to engage with an Adams Rite.

Housing: The housing is a metal shrouding which encases the pins, springs, and core. Note that the housing has indentations running down the sides. This is designed to engage with the set screw on the Adams Rite which will keep the cylinder locked into the Adams Rite.

Housing: The housing is a metal shrouding which encases the pins, springs, and core. Note that the housing has indentations running down the sides. This is designed to engage with the set screw on the Adams Rite which will keep the cylinder locked into the Adams Rite.

Plug or core: The plug or core is the rotating mechanism. The plug contains the keyway, where the key is inserted, as well as the bottom pins.

Top Chamber: The top chamber is located in the top half of the Mortise Cylinder. This contains the top pins and springs.

Top springs: Top springs sit in the top chamber applying a downward pressure on the top pins

Top Pins: Top pins sit in the top chamber between the top springs and bottom pins.

Bottom pins: Bottom pins sit in the plug of the cylinder. They have many different lengths, which match according to the depths of the cuts on the key. When the lock is engaged, the top pins and bottom pins block the sheer line, preventing the plug from spinning.

Cam: The cam is connected to the back of the Mortise cylinder by the cam screws and keeps the core attached to the rest of the cylinder. The cam spins with the core and acts as a When inside an Adams Rite, it is the cam that extends or retracts the latch or bolt. The cam is held in place by 2 cam screws.

Series Navigation<< 09 Part 1 – Tools Needed for Basic Storefront Hardware09 Part 3 – The Adams Rite >>

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