Deltana S33-R 3" x 3" Square Hinge, Residential, Steel (Pair)

No. The S33-R is a residential-grade steel hinge with a plain bearing pin, built for interior openings like bedroom, closet and hall doors. Plain bearing means the knuckles ride metal on metal rather than on ball bearings, so it isn't the choice for a heavy or high-traffic exterior door. For an exterior residential opening, the Delaney 4 inch bulk exterior residential hinge is the one to look at; for commercial traffic, step up to a ball bearing hinge such as the Orca Hardware 4 inch square corner plain bearing or the Don-Jo HWBB74545 heavy weight ball bearing.

Full mortise, yes. Both leaves recess into a mortise, one in the door edge and one in the jamb, so the leaves sit flush and the hinge is hidden when the door is closed. If your existing door and frame are already mortised for a 3 x 3 square corner hinge, the S33-R drops into that same pocket. A door prepped with radius corner mortises would need the corners squared off or a radius corner hinge instead.

No, the pin is removable. On an outswing door that means the hinge knuckles are on the exposed side and the pin can be driven out, so this is not the hinge for an entry or a secured storeroom that swings out. For that application you want an NRP hinge such as the Hager BB1168 non-removable pin full mortise ball bearing. The S33-R is fine on any inswing interior opening, where the knuckles sit on the secure side.

Bearing type is a traffic question, not a quality question. The S33-R uses a plain bearing, which is what goes on residential interior doors that get opened a few times a day. A ball bearing or concealed bearing hinge carries a heavier door and takes far more cycles without wearing the knuckles, which is why it shows up on commercial openings, doors with closers, and anything fire rated. Apartment interiors, closets and bedrooms: plain bearing is the right call. Corridor doors, offices, anything with a closer on it: go ball bearing, like the Ives 3CB1 concealed bearing full mortise or the Emtek 94013 heavy duty ball bearing pair in 3-1/2 x 3-1/2.

The leaf gauge is .085 inch. Check that against the depth of the mortise already cut in your door: a leaf thicker than the pocket holds the door proud of the jamb and can throw the latch out of the strike, while a thinner leaf leaves the door sitting back. At .085 in a 3 x 3 square corner mortise, the S33-R goes into a standard residential prep without recutting. If your old hinge measures noticeably heavier at the leaf, you're replacing a heavier-gauge hinge and should match that instead.

The Deltana S33-R is a 3" x 3" square corner plain bearing steel hinge sold as a pair for residential use. If the opening needs a 3-1/2 inch leaf instead, the Emtek 91013 is the direct counterpart: a residential duty plain bearing hinge pair, 3-1/2" x 3-1/2", square corners, plated steel. Same bearing type, same square corner prep, same pair packaging, just a taller leaf for a heavier or wider door.

The Deltana S33-R is a residential plain bearing hinge in a 3" x 3" size, sized for interior doors. For a heavier leaf, step up to a heavy duty hinge: the Emtek 92013 keeps the plain bearing action in a heavy duty 3-1/2" x 3-1/2" square corner plated steel pair, and the Emtek 94013 moves to a ball bearing knuckle in the same 3-1/2" x 3-1/2" square corner size. Both take a taller mortise than a 3 inch leaf, so the jamb and door edge have to be prepped for the larger hinge.

The S33-R is a residential steel hinge with plain bearing knuckles. Commercial openings that see frequent traffic are typically specified with a bearing hinge: the Orca Hardware 4040 Series is a 4" x 4" square corner plain bearing commercial hinge at medium duty, the Orca 3535 Series is a 4-1/2" x 4-1/2" square corner ball bearing commercial hinge at medium duty, and the Ives 3CB1 is a 3-knuckle concealed bearing full mortise hinge at medium duty. All three take a larger mortise than a 3 inch leaf.

The difference is the corner prep, and it decides whether the hinge drops into the existing mortise. The Deltana S33-R has square corners in a 3" x 3" leaf. The Delaney 3-1/2" x 3-1/2" interior residential hinge pair is cut with a 5/8" radius, and the Delaney 4" x 4" exterior residential hinge pair is also 5/8" radius. A radius corner hinge will not sit correctly in a square routed mortise and a square corner hinge leaves gaps at the corners of a radius mortise, so match the corner style to what is already cut in the jamb.

Several full mortise steel hinges share the mounting method but serve a different opening. The Command Access ETH-CB70 and ETM-CB70 are energy transfer hinges that carry wiring through the barrel for electrified locks, and the ETM version adds door position sensing. The BEST CECB179-12C is an electrified full mortise concealed bearing hinge with a 12-wire quick connect. The Stanley 2060R is a spring hinge, 4.5" x 4.5" square corner, which self-closes the door. The Deltana S33-R is a plain mechanical residential hinge with no wiring path and no spring - if the door needs power transfer or self-closing, none of those functions can be added to it.

The Deltana S33-R is a full mortise hinge, which means both the door edge and the jamb are routed to receive a leaf. When only the door can be mortised, a half mortise hinge is the right family: the Hager 1129 is a half mortise plain bearing commercial hinge, 4-1/2" standard weight steel with a heavy duty rating. It keeps plain bearing knuckles like the S33-R but mounts to the face of the frame rather than into a jamb mortise.

The S33-R is sold by the pair, so one order gets you two hinges. A standard interior door hangs on three hinges, so budget two pairs per door and you'll have a spare leaf, or order in pairs and plan the count across the job. Property managers doing a floor of doors should count openings times three, not times two. Screws are covered: the hinge takes a #9 x 3/4 inch wood screw.

#9 x 3/4 inch wood screws. That's a short screw by design, sized to bite the door edge and jamb without blowing through. If you're hanging a heavier slab or the jamb screws have stripped out over time, a longer screw of the same gauge run into the stud behind the jamb is the usual field fix, and the arc hole pattern in the leaf accepts a standard flat head countersink.

Six: Oil Rubbed Bronze, Brushed Nickel, Brushed Chrome, Polished Brass, Brushed Brass and Antique Brass. That range is the reason this hinge gets specified on a fleet of doors, since the hinge is the one piece of hardware you can't hide and it has to read with the lever and the strike. Match the hinge finish to the existing knobs across the building and a hinge swap disappears; mix Polished Brass hinges into an Oil Rubbed Bronze opening and it's the first thing anyone notices.

No handing to specify. It's a symmetrical full mortise butt hinge with a removable pin, so the same hinge hangs a left or right hand door. Orientation is decided by which way you set it on the door, not by how you order it. All you pick is the finish.

On the interior doors, yes, provided they're prepped for a 3 x 3 square corner mortise. Steel construction, plain bearing, one finish across the whole run keeps your parts room to a single SKU. Where it stops: unit entry doors, anything with a closer, and any outswing opening. Entry doors are usually 3-1/2 or 4 inch prep and want a ball bearing hinge, and outswing needs a non-removable pin, which this hinge doesn't have. Walk the building, note the hinge size and corner style at each opening type, and you'll likely end up with the S33-R covering the interiors and a heavier bearing hinge covering the entries.

The Deltana S33-R ships as a pair. For openings that take three hinges per door, the Ives 1010RP is a steel plain bearing residential hinge with square corners sold as a set of three, and the Schlage Residential S3P1010 is a 3.5" x 3.5" square corner plain bearing mortise hinge in a pack of three. Both share the S33-R's plain bearing action and square corner prep; the Schlage is the 3-1/2 inch leaf size.

Not with a single part. The Deltana S33-R covers the light interior side: 3" x 3", square corner, plain bearing, residential steel, sold in pairs across six finishes including oil rubbed bronze, brushed nickel and polished brass. For heavier corridor leaves, the Orca Hardware 4014 Series is a 4" x 4" plain bearing commercial hinge with a 1/4" radius corner and the Orca 4040 Series is the 4" x 4" square corner version, both medium duty. Standardize by corner style first - keeping everything square corner, as the S33-R and the Orca 4040 both are, means one router template family across the two sizes.

The Deltana S33-R uses plain bearing knuckles and is built for residential interior use, where door weight and cycle counts are low. Ball bearing knuckles carry the load on a bearing race between knuckles instead: the Delaney CH401X is a 4" x 4" commercial ball bearing hinge with a square corner, and the Emtek 94013 is a heavy duty ball bearing pair at 3-1/2" x 3-1/2" with square corners in plated steel. Choose by the door - heavier leaves and high cycle openings are typically specified with bearing hinges, while an interior passage door is the S33-R's application.

Steel, with a plated finish over it. Steel is the standard for interior residential hinges and it's what keeps the cost down, but it's a ferrous base, so sustained moisture will eventually work on it through any finish. A normal bathroom or laundry door is no problem. A pool house, a coastal exterior opening, or anywhere that sees salt air or standing humidity calls for a non-ferrous hinge, such as the McKinney T2314 non-ferrous standard weight hinge, rather than a plated steel one.

The S33-R pair ships with #9 x 3/4 inch wood screws for mounting. Nothing else is required to hang the door on a mortise that's already cut. If you're prepping a new slab you'll need a hinge template or a router jig for the 3 x 3 square corner mortise, and those are separate.