Can a thumbturn cylinder be used in place of the thumbturn on the L9000 series?
Although it is not recommended to use a thumbturn cylinder on a L9000 function that uses a regular thumbturn, consideration should be given to the following if a thumbturn cylinder is desired to be used.
Non handed thumbturn cylinders (like the 09-900) when used on L9000 functions that have a regular thumbturn, can be “overridden” by the key outside to unlock (or lock the lock) if the thumbturn cylinder is not returned to the normal or “home” position.
Non handed thumbturn cylinders when used on L9000 functions that have a regular thumbturn can cause binding if the thumbturn cylinder is deliberately held while not in the normal or “home” position.
Handed thumbturn cylinders when used on L9000 functions that have a regular thumbturn, can cause binding when not returned to the normal or “home” position.
L9453 operation will be affected since the thumbturn hub is what provides the special function (requiring additional 20° rotation to unlock outside lever). A thumbturn cylinder will not provide the extra rotation needed.
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