Mckinney TA2772 Half Surface Door Hinge, 5-Knuckle, Standard Weight, 4-1/2"

A half surface hinge splits how it mounts: the jamb leaf sits in a mortise in the frame and is fastened with machine screws, while the door leaf goes on the face of the door with thru bolts and grommet nuts. That makes the TA2772 the choice when the door itself cannot take a mortised leaf or will not hold screws reliably, typically a repaired or previously damaged door edge, while the frame is still sound and already mortised. If both frame and door are in good shape and prepped, a standard full mortise hinge is the simpler job. Straight full mortise options in the same 4-1/2 inch size include the Ives 3CB1 concealed bearing hinge and the Orca Hardware 3535 Series 4-1/2 x 4-1/2 square corner ball bearing hinge.

Both. The TA2772 is a steel half surface hinge recommended for average frequency and medium weight wood or metal doors in public buildings with medium traffic. The door leaf is applied to the door face with thru bolts and grommet nuts, so it does not depend on screw threads holding in the door material, which is why it suits a hollow metal door with a chewed up edge as well as a wood one.

No handing to specify. The TA2772 half surface hinge is reversible, so one part number covers left and right hand openings. That is useful for a property manager stocking spares across a building: one hinge fits whichever door fails next.

The pin is held by an NRP set screw, and NRP (non-removable pin) is offered as an ordering option on the TA2772. Specify it for any out-swinging door where the hinge barrel is on the unsecured side, since that is the case where a pulled pin lets the door come off. For a comparable NRP hinge in a full mortise pattern, the Hager BB1168 is offered as a non-removable pin heavy duty version and the Deltana CSB45N is a 4-1/2 x 4-1/2 square NRP pair.

The TA2772 has square corners, so it matches a square corner frame mortise, which is what commercial hollow metal frames are prepped for. The jamb leaf goes into that mortise with machine screws. What changes is the door side: the door leaf mounts on the surface, so an existing door mortise gets covered rather than reused. If you want to reuse both mortises on a square corner opening, a full mortise hinge such as the Orca Hardware 3535 Series in 4-1/2 x 4-1/2 square corner ball bearing is the like-for-like swap.

No, and mixing them up gets the wrong part on the door. On the TA2772 half surface hinge the mortised leaf is the jamb leaf and the surface applied leaf is on the door. A half mortise hinge is the reverse: the door leaf is mortised into the door edge and the frame leaf sits on the face of the frame. The Hager 1129 is a half mortise 4-1/2 inch standard weight steel hinge if that is the pattern your opening needs. Decide by which side is damaged or unprepped, then pick the hinge that puts the surface leaf there.

The TA2772 is rated standard duty and recommended for average frequency, medium weight wood or metal doors. For a heavier or higher traffic opening, the Don-Jo HWBB74545 and HWBB84545 are both heavy weight full mortise ball bearing hinges in 4-1/2 by 4-1/2, and the Hager BB1168 is a heavy duty full mortise ball bearing hinge furnished with a non-removable pin. All three are full mortise, so the door edge must be prepped for a mortised leaf rather than a surface applied one.

The TA2772 is a mechanical hinge with no conductor path. For an electrified opening, the Command Access ETH-BB68 is a 5 knuckle heavy duty steel base energy transfer hinge, the ETH-CB70 is a 3 knuckle standard weight steel base energy transfer hinge rated medium duty, and the BEST CECB179-12C is a steel full mortise concealed bearing electrified hinge with a 12-wire quick connect. If the opening also needs door position reporting, the Command Access ETM-BB68 adds an integrated door position switch.

The TA2772 is a plain hanging hinge recommended to hang a door for a 180 degree swing in one direction, with no spring or double acting mechanism. For a self-closing leaf, the Stanley Security 2060R in 4-1/2 by 4-1/2 is a full mortise square corner spring hinge on a ferrous steel base, matching the TA2772 on size and corner style. For a door that swings both directions, the BEST DAP-3 is a heavy duty double acting pivot for commercial interior doors, which is a pivot set rather than a hinge and changes the frame and floor prep.

Fasteners are 1/2 inch x #12-24 machine screws and 1-1/4 inch x #12 wood screws. The machine screws take the jamb leaf into the mortised frame. Note that the door leaf is applied full surface with thru bolts and grommet nuts, so for that side you are drilling through the door, not just screwing into it.

Yes. The TA2772 is recommended to hang a door for a 180 degree swing. Whether you get the full sweep still depends on the opening: trim projection or a wall return past the frame face will stop the door before the hinge does.

Eight finishes, all in the 4-1/2 inch size: 605 bright brass, 606 satin brass, 612 satin bronze, 613 oil-rubbed satin bronze, 625 bright chrome, 626 satin chrome, US10A antique bronze, and 600 primed for painting. For matching existing openings in a commercial building, 626 satin chrome is the common one. If you are repairing a door in a painted opening, 600 primed takes finish paint so the hinge disappears into the frame color.

Ball bearing, yes. That is what lets the hinge take the constant loading a closer puts on it without the knuckle wearing and the door starting to drag. A plain bearing hinge in the same size, such as the Orca Hardware 4040 Series 4 x 4 square corner plain bearing hinge, is the lower duty alternative where there is no closer and traffic is light.

McKinney's BP-10 back plate is compatible with the TA2772 and is worth adding on a door face that is soft, delaminated, or previously torn out. It spreads the load of the thru bolts across the door instead of concentrating it at the bolt holes. A hospital tip is also available if you need the barrel ends sloped, which is standard practice in healthcare and behavioral settings where a square hinge tip is a ligature or snag point.

Material. The TA2772 is steel, the TA2372 is stainless steel. Both are five knuckle standard weight half surface hinges and both are reversible. Pick the stainless TA2372 for exterior, coastal, or wash-down openings where corrosion is the concern; the steel TA2772 is for interior commercial openings.

The TA2772 is 4-1/2 inch with square corners and a ball bearing option. The Orca Hardware 3535 Series is a 4-1/2 by 4-1/2 square corner ball bearing commercial hinge rated medium duty, so it matches on size, corner style and bearing type while using a conventional mortise prep on both leaves. The Deltana CSB45N is a 4-1/2 by 4-1/2 square hinge supplied as a pair with a non-removable pin if the security pin is the deciding factor.

The TA2772 is a standard duty hinge for average frequency medium weight doors, which is below what a detention opening asks of a hinge. For that service, the BEST BB855 is a heavy duty steel double weight concealed ball bearing prison hinge, the Stanley Security BB855 is a double weight prison hinge in 5 by 6 furnished with no holes and not swaged, and the Hager 990 STEEL is a heavy duty full surface prison hinge in 3 by 4 with a welded tip. The Hager 990 is full surface, meaning both leaves apply to the face, unlike the half surface arrangement of the TA2772.

The TA2772 carries five knuckles with the bearing visible between them and is offered with a ball bearing. The Ives 3CB1 is a steel 3-knuckle concealed bearing full mortise hinge rated medium duty, and the 3CB1HW is the heavy weight version of that same 3-knuckle concealed bearing full mortise pattern. Concealed bearing hinges hide the bearing inside the barrel for a cleaner knuckle line; the TA2772 differs further in that it is half surface rather than full mortise.

The TA2772 holds its pin with an NRP set screw and can be ordered with the non-removable pin option. Among other commercial hinges, the Hager BB1168 is a non-removable pin full mortise ball bearing heavy duty hinge, and the Deltana CSB45N is a 4-1/2 by 4-1/2 square hinge pair furnished with a non-removable pin. The Deltana DE44R5TA is a 4 by 4 steel security hinge with a 5/8 inch radius and tamper resistant construction, sold as a pair, for out-swinging doors where the pin is exposed.

The TA2772 has square corners, which will not seat in a frame routed for a radius corner. The Orca Hardware 4014 Series is a 4 by 4 with 1/4 inch radius corner plain bearing commercial hinge and the 3514 Series is the 3-1/2 by 3-1/2 version of the same 1/4 inch radius pattern, both rated medium duty. Match the corner radius and leaf size to the existing mortise before ordering.