Rolls HR31 Rack Ear Bracket Set for HR72, HR73 & HR78

Rolls HR31: Steel Rack Ears for HR72, HR73, and HR78 Units

The Rolls HR31 is a set of two steel rack-ear brackets that mount an HR72, HR73, or HR78 unit into a standard 19-inch rack. It exists because those half-rack Rolls devices ship without rack hardware, and installing them into a rack requires proper ears to bolt them to the rails. The pair attaches to the sides of the unit and provides the flanges that screw into the rack frame. Made from 0.050-inch cold-rolled steel with a black powder-coat finish and RoHS compliance, they are built to hold gear securely for the long haul. For anyone rack-mounting a compatible Rolls unit, the HR31 is the correct bracket set to do it.

Purpose-Made Ears for a Secure Rack Mount

The HR31 provides a matched pair of rack ears designed specifically for the HR72, HR73, and HR78, so the mounting holes line up without modification. Rack ears work by extending the unit's width out to the 19-inch rack rails, giving screw points that anchor the device against movement. Because these brackets are made for the exact chassis, the unit sits square and solid rather than relying on a shelf or improvised bracket. That secure mount protects both the gear and its cable connections from the vibration of a working or traveling rack. For an installer, purpose-made ears are the difference between a device that is properly racked and one that is merely resting in place.

Steel Construction With Weather-Resistant Finish

The HR31 brackets are formed from 0.050-inch cold-rolled steel and coated in a black powder-coat finish, with RoHS-compliant materials throughout. The steel gauge is chosen to carry the unit's weight without bending, so the mount stays rigid under load and handling. A powder-coat finish resists scratches, moisture, and corrosion far better than bare or painted metal, which matters in racks that live in garages, trucks, or utility rooms. That durability means the ears keep looking and holding as new long after installation. For gear that has to stay mounted reliably in demanding conditions, the HR31's rugged, finished steel is built to last the life of the unit.