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Qualitydoor.com > Locks > Deadbolts & Deadlocks > Adams Rite 4550 Lever Operator (for MS1850A or MS1850S)

Adams Rite 4550 Lever Operator (for MS1850A or MS1850S)

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SKU: 4550

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Adams Rite 4550 Specification Sheet

Adams Rite 4550 Installation Instructions

Price:	$129.00

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Adams Rite 4550
Lever Operator for MS1850A or MS1850S

Housing
Aluminum casing is 1\" wide x 7½" long x 1" deep. Attached to door stile by four #10 screws.

Stop Clearance
Lever housing projects 11/16" forward of cylinder backset centerline. Depending on height of door stop and width of door/jamb gap, it may be necessary to modify the stop to clear t he housing. (For fin type stops, this is easily accomplished). Hollow stops may preclude use of lever.

Function
Easy unlocking of any MS deadbolt by approximately 3lbs. downward force on a 3" lever. Lever is spring loaded to horizontal, relocks with upward motion. Indicator signals lock status. Can be installed in place of existing key cylinder or cylinder type thumbturn on inside of door.

Lever
3" long aluminum with end-return design offers comfortable grip to lock or unlock.

Indicator
Words "LOCKED" in red letters or "OPEN" in black letters on white background when lock is thrown or retracted. Indicator is driven by lock bolt itself.

Compatible Deadbolts
Any MS pivoted bolt deadbolt including "Schoolhouse" versions can be fitted with the 4550: MS1850S, MS1950, MS1837, etc. Derivative units such as 1870, 1870HM, or 1877 flushbolts (bolt into threshold) are also operable by the 4550 lever. Not compatible with MS+ 1890 latchlock or with ^" backset locks.

Operation
Turn lever downward 90° to unlock. When released, lever returns to horizontal. Turn lever upward 90° to relock. Key operation from outside is not affected. Clutching action prevents damage to internal components.

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