Schlage Commercial L583-638 Cam - Falcon MA Series Cam for Cylinder Lengths 1-1/8", 1-3/8", 1-5/8"

The L583-638 is the cam only, not a cylinder. It's the driver tailpiece that mounts to the back of a mortise cylinder and turns the lock case. You order it when you have a cylinder that needs a Falcon MA series cam, or when the original cam was lost or damaged during a rekey or a lock swap. If you need the cylinder itself, order a mortise cylinder separately.

It covers mortise cylinder lengths of 1-1/8, 1-3/8 and 1-5/8 inches. Those are the three most common commercial mortise cylinder lengths, so one cam part number handles the standard range of door thicknesses you'd see across a building. Measure your existing cylinder from the shoulder to the back face to confirm which of the three you have.

That's exactly what it's for. The L583-638 is the Falcon MA series cam, so it's the correct cam to specify when a mortise cylinder is going into an MA series mortise lock body. Cams are lock-specific: a cam cut for one manufacturer's case will not reliably throw another's retractor, so match the cam to the lock case, not to the cylinder brand.

No. The L583-638 is the cam only, the driven tailpiece that transfers key rotation from a mortise cylinder to the lock case, sized for cylinder lengths of 1-1/8 inch, 1-3/8 inch and 1-5/8 inch. If you need the keyed cylinder itself, that is a separate item, such as the Calibre CL1000-KA2, which supplies a pair of 6-pin mortise cylinders in Schlage C keyway keyed alike in pairs. Buy the cam when the cylinder you already have is correct but the cam is wrong for the lock case or missing.

Yes. If your openings run Falcon MA series mortise locks, keeping L583-638 cams on the shelf lets you drop in rekeyed or replacement mortise cylinders without waiting on a cam. Because the one cam covers 1-1/8, 1-3/8 and 1-5/8 inch cylinder lengths, you don't need a separate part number per door thickness. It's a commercial-duty part, not a residential item.

No. This cam is for mortise cylinders going into mortise lock cases. Rim cylinders use a flat tailpiece instead of a cam, and key-in-lever cylinders use their own tailpiece geometry. Using a mortise cam in either of those applications won't retract the latch.

No, it's supplied as the cam alone. If you need keyed mortise cylinders, a keyed-alike pair is a separate item: the Calibre Door Closers CL1000-KA2 is a pair of 6-pin Schlage C mortise cylinders keyed alike, which is a common pick when two cylinders on the same opening need to run one key.

No. The cam sits behind the plug and only transfers rotation to the lock case, so it has nothing to do with keyway or pinning. Keyway and pinning are properties of the cylinder. Pick the cam for the lock case (Falcon MA here) and the cylinder for the keyway you're building to, such as Schlage C on the Calibre CL1000-KA2 pair.