Cylindrical lock Vs Mortise lock

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26 Apr 2019 11:57 - 26 Apr 2019 11:59 #41 by SteveB
Cylindrical locksets are the most common commercial locks used. This type takes the standard 161 lock prep which, as shown in the enlarged graphic, is a 2 1/8" crossbore, 2 3/4" backset, and a 2 1/4" x 1 1/8" square corner edge cut out in the door.

Mortise locks provide the highest level of security. They are built for heavy duty use, and are priced accordingly. You'll see these in a lot of public schools and Universities...but they are called for just about anywhere that expects to get heavy & frequent use...and abuse.

The prep for this lock is an 8" x 1 1/4" edge cut out in the door, with holes drilled in the face of the door at different locations depending on the lock function required. The lock body inserts into the edge prep so it is recessed into the door. The handles, cylinders, thumbturns, and/or escutcheon plates are then installed through the door face cut outs into the lock body. The enlarged graphic on the right provides a good look at what holes will be used for different functions.

More information and detailed graphics are here: Lever Locksets

Steve Behrens
https://www.commdoor.com/
Last edit: 26 Apr 2019 11:59 by SteveB.
The following user(s) said Thank You: LumberGuy

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06 May 2019 22:36 #54 by LumberGuy

SteveB wrote: More information and detailed graphics are here: Lever Locksets


Thanks for that link. Good info there, and the pictures help a lot for a new guy like me to understand.

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