Straight cam. The 90X10SC118 is a straight cam cylinder and that is what the Y trim and options on the Dormakaba 9100, 9300, 9400 and 9500 exit devices take. Cam style is not interchangeable, a wrong cam will thread in but will not retract the latch.

It comes in the Schlage C keyway, so it can be keyed into an existing Schlage C system by your locksmith. That is the single most common commercial keyway in North America, which is why Dormakaba offers this cylinder in it rather than a proprietary keyway.

It is a 1-1/8 inch length mortise cylinder, which is the standard size used in mortise lock cases and exit device trim on typical 1-3/4 inch commercial doors. Longer cylinders are only needed where trim or an armored front adds depth behind the face.

The 90X10SC118 is a conventional mortise cylinder, so it gives you standard pin tumbler security and open key duplication on Schlage C blanks. If the opening needs key control and drill and pick resistance, look at a Medeco 1-1/8 to 1-3/4 inch straight cam mortise cylinder instead, such as the 100200 Original 6-pin in the 00 keyway or the 100200T M3, both UL 437 high security and Grade 1.

A cylinder ring is included with the 90X10SC118. The ring takes up the gap between the cylinder shoulder and the lock face or trim so the cylinder sits flush without backing it out of thread engagement.

The 90X10SC118 is Schlage C, an open keyway, so it will not give you patented key control. For a restricted system in the same 1-1/8 inch straight cam configuration, Medeco offers the KeyMark 100200K in the 8E keyway and the Bilevel 100200J in DL, both heavy duty Grade 1 and both covering 1-1/8 to 1-3/4 inch lengths.

All three are standard 6-pin mortise cylinders spanning 1-1/8 inch to 1-3/4 inch with a straight cam and Grade 1 heavy duty ratings, and they differ by key system: the 100200 Original uses the 00 keyway, the 100200T is the M3 platform in the DL keyway, and the 100200K is KeyMark in the 8E keyway. The 100200 and 100200T are called out as UL 437 high security. The Dormakaba 90X10SC118 differs on key system as well, using the Schlage C keyway, and is a conventional cylinder specified for Dormakaba M9050, 9080 and 9082 mortise locks and 9100, 9300, 9400 and 9500 exit trim, so the choice comes down to whether the building stays on Schlage C keys or moves to a restricted Medeco system.

The Dormakaba 90X10SC118 is built at a fixed 1-1/8 inch length, so it suits openings where that dimension is already confirmed. If you want a single part number that spans a range of lengths, the Medeco 100200 Original, the 100200T M3, the 100200J Bilevel and the 100200K KeyMark are all standard 6-pin mortise cylinders covering 1-1/8 inch to 1-3/4 inch with a straight cam, all Grade 1 heavy duty. That range makes them easier to standardize across doors of differing thickness, while the 90X10SC118 keeps you on the Schlage C keyway already cut for your building.

The fit hinges on cam and length, not brand. The Dormakaba 90X10SC118 is the cylinder specified for Dormakaba M9050, 9080 and 9082 mortise locks and 9100, 9300, 9400 and 9500 exit Y trim and other straight cam applications, at 1-1/8 inch in Schlage C keyway. The Medeco 100200 series cylinders are also straight cam and cover 1-1/8 inch to 1-3/4 inch, so the interface style matches, but they are Medeco keyway cylinders rather than a Dormakaba-branded part, and the cylinder ring that comes with the 90X10SC118 is part of the Dormakaba assembly. Confirm cam orientation and collar requirement on the trim before swapping brands.

One finish: 630 satin stainless steel. It reads as a brushed silver-grey and pairs with 626 satin chrome and 32D stainless trim on most commercial openings, so it blends in on standard institutional hardware.

Commercial. It is a replacement cylinder for Dormakaba commercial mortise locks and exit device trim, not a residential product, and it is the part you order when you are rekeying or replacing cylinders across a building rather than changing out whole lock bodies.