Arrow MLX82 SR - Storeroom Lock

The MLX Series was designed around three practical problems that facility managers and maintenance crews run into on commercial door schedules: levers that break when someone forces a locked door, installations that take too long when there are 200 doors to hang, and lever sets that need replacement within a few years because the mechanism wore out. The Arrow MLX82 SR addresses all three. It's a Grade 2 storeroom lock with a freewheeling lever that disengages from the internal mechanism under forced rotation, a two-screw installation that gets each door done faster than a standard lockset, and a 10-year mechanical warranty on a lever set that costs a fraction of Grade 1 alternatives.

The storeroom function means the outside lever is always locked. It doesn't turn, doesn't unlatch, and has no freewheel that unlocks it. A key in the outside cylinder retracts the latch for outside entry each time. The inside lever is always free for immediate egress without a key. For all Arrow lever locks and the complete MLX Series lineup, browse our Arrow lever locks catalog. For all Grade 1 and Grade 2 commercial locks, view our commercial locks catalog.

Freewheeling Lever: What It Is and Why It Matters

A standard lever lock transfers force from the lever directly into the spindle and mechanism. When someone grabs a locked lever and applies heavy downward or rotational force, that force has nowhere to go except into the internal components. Spindle damage, rose cracking, and lever bending are the result. The Arrow MLX freewheeling lever disengages from the retractor when the lock is in the locked position. Applied force rotates the lever but nothing inside moves. The mechanism is completely protected from abuse-mode lever force. When the lock is operated correctly with a key or from inside, the lever engages the retractor normally. The freewheeling only activates in the locked state.

Arrow MLX82 SR Technical Specifications

Series: Arrow MLX. Function: 82, Storeroom. Outside lever: always locked. Latch operation: key in outside lever or inside lever. Lever design: Sierra (SR). Grade: ANSI/BHMA A156.2, Series 4000, Grade 2. Lever material: Pressure cast zinc, 4-3/4" (120.65mm) length. Rose: Wrought brass, 3-11/32" (84.8mm) diameter. Projection: 2-17/32" (64.5mm) from door face. Freewheeling lever: Yes. Installation: 2-screw lockset install. Backset: 2-3/4" standard. Door thickness: 1-3/8" to 1-3/4" standard. Latch: Stainless steel, 1/2" throw, UL Listed. Guarded latchbolt: Yes, on all locking functions. Latch front: 1-1/8" x 2-1/4" for 2-3/4" backset. Strike: ANSI A115.2, 4-7/8" x 1-1/4" curved lip. Handing: Non-handed. Cylinder: Solid brass, 6-pin, choice of Arrow AR or Schlage CS keyway; SFIC (BEST) less core also available. Keys: Brass, standard. Keying: Standard KD, Keyed Alike (+$20.00), Master Keyed (+$30.00). Warranty: 10-year mechanical. Finishes: 26D Satin Chrome, US3 Bright Brass, 10BP Dark Oxide Satin Bronze Oil Rubbed.

Guarded Latchbolt

The MLX82 includes a guarded latch on all locking functions. A guarded latch incorporates a physical guard plate that blocks the latch face from being accessed by a thin tool, credit card, or shim inserted between the door and frame. Without the guard, a storeroom function latch can be retracted by pressing a card against the latch bolt and working it back through the strike gap. The guard eliminates that attack vector. On a storeroom door where the outside lever is always locked and key access is the only authorized entry method, the guarded latch closes the last mechanical vulnerability.

Cylinder and Keyway Options

The MLX82 is available with a standard Arrow AR keyway, a Schlage C keyway, or an SFIC (Small Format Interchangeable Core, Best format) less-core configuration for facilities running a Best or compatible interchangeable core master key program. If the building runs the existing Schlage C keyway master key system, order the Schlage C option and key the lock directly into the existing system at time of order. The SFIC less-core option ships without a core, which is specified when the facility supplies its own cores from a managed IC program.