Dorma 75343 3/4" Offset Standard and Heavy-Duty Steel Right Hand Bottom Arm For Lead-Lined 1-3/4" Doors, Satin Chrome

Handing has to be specified. The 75343 comes as a left hand or a right hand arm, and the two are not the same part, so you order the one that matches the leaf. Stand outside the opening: if the pivot side is on your right and the door swings away from you, it is right hand. That is the 75343 RH 626 configuration. Get the hand wrong on an offset arm and it will not line up with the pivot point at the sill.

Both are arms, but not for the same job. The Deltana DCCA4041 is a cushion arm built for the DC40 door closer and the DCHA1050 is a hold open arm built for the DC10 door closer, so each one is matched to its own closer series. The Dorma 75343 is an offset hung bottom arm, handed left or right, and it belongs to an offset hung arrangement rather than to a DC10 or DC40 closer. Arms do not cross between closer families, so neither Deltana arm retrofits where a 75343 came out.

It is the bottom arm only, a replacement part that ties the bottom of an offset hung door to the closer hardware at the sill. There is no closer body, no spindle, no cover plate in it. If the arm is what is bent, worn, or dragging, this is the piece you need. If the closer itself has failed, the arm alone will not fix the opening.

No. Closer arms are tied to the closer series they were built for. The Deltana DCCA4041 cushion arm is a DC40 part, the DCHA1050 hold open arm is a DC10 part, and the LCN 4040SE-3038 track, the 1260-30 cush shoe support, and the 1260-18QF bracket kit each belong to their own LCN series. None of them mount to an offset hung door at the sill the way the 75343 does. Replace an arm with the arm for that closer.

No, each of those LCN pieces is keyed to a specific LCN closer series. The 4040SE-3038 is a standard track for 4040SE Series fire and life safety door closers, the 4040SEH-3038 is a hold open track for the 4000 Series, the 1260-18QF is a quick fix bracket kit for 1000 Series closers, and the 1260-30 is a cush shoe support for the 1260 Series with 3-1/16 inch reveal compatibility. The Dorma 75343 is an offset hung bottom arm and is ordered by handing, so it is matched to the opening and its pivot arrangement, not to an LCN closer series.

Satin chrome, carried as 626 in the model designation. That is the standard BHMA satin chromium plated finish, so it sits alongside the 626 levers, closers, and exit devices already common in commercial and institutional buildings. Against a brushed stainless 630 it reads slightly brighter, though on a bottom arm at the sill the difference is rarely noticeable from standing height.

The Cal-Royal 900 Series kit is a door closer accessories kit for commercial door controls in the Cal-Royal 900 Series, so what it carries is matched to that series. The Dorma 75343 is an offset hung bottom arm for commercial door control work and is ordered by handing, left hand or right hand, which is a fit that has to match the opening rather than something a general series accessories kit covers.