Keedex K-BXMOR3 Weldable Gate Box Mortise Lock - No Trim Hole Cylinder Hole Only

It's a steel enclosure you weld to a gate frame or a tubular-steel post so a mortise lock can be installed where there is no door stile to mortise into. The K-BXMOR3 is drilled for a cylinder only, with no trim hole, so it suits a keyed cylinder application without lever or knob trim on that side. The lock itself, the cylinder, and the trim are separate purchases.

Yes. The K-BXMOR3 is machined to a 2-3/4 inch backset, which is the standard commercial mortise lock backset. A mortise body cut for a 2-3/8 inch backset, the common bored-lock dimension, will not line up with the cylinder hole.

Both hold the same mortise prep and the same 2-3/4 inch backset; the difference is wall thickness. The 14 gauge is the lighter of the two and welds faster on light tube gates. The 10 gauge is the heavier steel for high-abuse or high-traffic openings, gates that get slammed, and anywhere the box is exposed to attack. Substrate is the only choice you make when ordering.

No. The K-BXMOR3 is punched for the cylinder only and has no trim hole, so there is no opening for a lever, knob, or thumbturn spindle to pass through. Use it where the gate is keyed from one side and released some other way. For a mortise lock with operating trim you need a gate box that carries both the cylinder hole and the trim hole.

It's the weldable steel housing only. The mortise lock body, the cylinder, the strike, and any trim are all bought separately. Order the lock first, confirm it's a 2-3/4 inch backset mortise body, then weld the box in.

The box measures 4-5/8 inches wide by 8-1/8 inches high by 1-3/4 inches deep. That 1-3/4 inch depth is what decides whether it clears your gate frame member, so check the tube or channel you are welding to before cutting.

Yes, the box accepts electrified mortise hardware. Plan your wire path before welding, since once the box is on the gate frame the only route to the lock body is through the frame member behind it.