(108) Yale 81 deadlock teardown
Channel: Nite 0wl
Date: 2018-11-03

The Yale 81 "rollerbolt" deadlock is part of Yale's modern nightlatch series of rim lock designs, unlike most of the others which are essentially modern restyling of traditional latch/bolt designs the 81 rollerbolt offers a fairly unique combination deadbolt and latch function.
The rollerbolt gets its name from the unusual rolling element built into the center of the bolt which acts to reduce friction against the strike box which is a common issue with traditional deadbolts. This is combined with an unusual spring latch function which keeps the bolt partially extended under spring pressure when unlocked which allows the bolt to act like a spring catch or detent.