Orca Hardware 3-1/2" x 3-1/2" x 5/8" Radius Corner Plain Bearing Residential Hinge

If the door and jamb are prepped for a 3-1/2 x 3-1/2 hinge with 5/8 inch radius corners, the Orca 3558 drops straight into that same pocket. That is the standard prep on most residential interior doors, factory-routed with rounded corners rather than square. Check the corner of the existing leaf first: if it is square, the router pocket has square corners and this radius-corner hinge will leave gaps at the corners. Orca publishes a template for the 3558 so you can verify the screw pattern against your prep.

It is about how the pocket in the door edge was cut. A router with a bit leaves rounded corners, so most pre-hung residential doors take a radius corner hinge like the 3558 with its 5/8 inch radius. Mortises chiselled by hand or machined for commercial frames have square corners and need a square corner hinge. Pull one existing hinge and look at the corner of the leaf, or look at the pocket itself. If you need square corners at the same 3-1/2 x 3-1/2 size, the Emtek 91013 residential plain bearing hinge and the Schlage Residential S3P1010 are both square corner in that size.

No. The 3558 is built for residential duty, and a zinc alloy plain bearing hinge is not what you want on an office, retail, or corridor door that cycles all day. For commercial traffic, go to a ball bearing hinge with a steel base: the Don-Jo HWBB74545 is a heavy duty full mortise ball bearing hinge at 4-1/2 x 4-1/2, and the Ives 3CB1 is a medium duty concealed bearing full mortise hinge. Note that both are larger than 3-1/2 inch, so the door will need re-prepping.

Use a square corner residential plain bearing hinge in the same 3-1/2 inch by 3-1/2 inch size. The Schlage Residential S3P1010 is a 3.5 inch by 3.5 inch square corner plain bearing mortise hinge sold in packs of three, and the Emtek 91013 is a 3-1/2 inch by 3-1/2 inch residential plain bearing hinge with square corners in plated steel, sold in pairs. The Orca 3558 is cut with 5/8 inch radius corners, which is the wrong corner profile for a square routed mortise. Confirm the corner style off the existing hinge before ordering, since the leaf size can match while the corner does not.

No, the 3558 is not ADA compliant. If you are hanging doors in a space that has to meet accessibility requirements, this residential hinge should not be the one you spec.

Thirteen finishes across the 3558: Oil-Rubbed Bronze, Dark Oxidized Satin Bronze, Satin Nickel, Matte Black, Painted Black, Polished Chrome, Satin Chrome, Brushed Zinc, Bright Brass, Satin Brass, Satin Brass Blackened, Satin Stainless Steel, and White. That covers the two black options separately, which matters on a repaint or a turn job: Painted Black is a paint coat, Matte Black is the plated look most current levers and knobs are sold in. If you are matching a fleet of units, pick one and stay on it, since bronze and brass tones shift noticeably between finish families.

Plain bearing means the knuckles ride directly on each other with no ball bearing race in between. That is fine for a residential interior door that swings a few dozen times a day and it is quieter and lower profile. Ball bearing construction is what carries weight and cycle count, which is why heavy commercial doors use it. If your opening is a heavy solid core or an exterior door on a house, step up to a ball bearing residential hinge such as the Emtek 94013 at the same 3-1/2 x 3-1/2 size, or the Delaney RH45 exterior residential hinge in 4 x 4 with 5/8 inch radius.

Full mortise. Both leaves recess into the door edge and the jamb, so the hinge sits flush and only the barrel shows when the door is closed. You need a routed pocket on each side to hang it, at 3-1/2 x 3-1/2 with 5/8 inch radius corners. It is not a surface-applied hinge and it will not work on a door with no hinge prep unless you cut the mortises.

For interior unit doors it works, provided the existing prep is 3-1/2 inch with 5/8 inch radius corners, which is what most residential pre-hung doors are cut for. Two limits to know before you commit to a fleet: it is a residential-duty plain bearing hinge, and it is not ADA compliant. Entry doors, common corridor doors, and anything on a closer or in a public circulation path should get a commercial ball bearing hinge instead. For those openings the Ives 3CB1 concealed bearing full mortise hinge or a Don-Jo HWBB series heavy weight ball bearing hinge is the correct class of part.

The Delaney RH35 bulk interior residential hinge is the direct match, 3-1/2 x 3-1/2 with 5/8 inch radius corners, sold in pairs. If you are moving up a size on the same corner style, the Delaney RH45 is a 4 x 4 exterior residential hinge with the same 5/8 inch radius, and the Deltana DE44R5TA is a 4 x 4 x 5/8 radius steel security hinge. The Orca 3558 itself is zinc alloy, so if a steel base is what your job calls for, those Delaney and Deltana options are the ones to look at.

No. Power transfer needs a hinge with a wire raceway through the barrel. The Command Access ETH-CB70 is an energy transfer hinge with 3 knuckles, standard weight steel base, rated medium duty, and the ETH-BB68 is a 5 knuckle heavy duty steel base energy transfer hinge. For a door position signal along with the power, the Command Access ETM-CB70 is an energy transfer monitor hinge with door position sensing on a 3 knuckle steel base. The Orca 3558 is a plain bearing hinge with no electrical provision, so it is used on the non-electrified leaves of the same opening.

The Orca 3558 is built for residential application in a 3.5 inch by 3.5 inch leaf. For commercial openings the comparable set runs to larger commercial hinges: the Delaney CH401X is a 4 inch by 4 inch commercial ball bearing hinge with square corners, and the Ives 3CB1 is a steel 3-knuckle concealed bearing full mortise hinge rated medium duty. Those are 4 inch and larger commercial patterns, so the jamb prep and screw pattern differ from a 3-1/2 inch residential mortise. Match the hinge to the door leaf already cut rather than to the traffic level alone.

They are both steel plain bearing residential hinges, but they are not interchangeable in a radius prep. The Ives 1010RP is a steel plain bearing residential hinge with square corners, rated medium duty and sold as a set of three. The Orca 3558 is a plain bearing residential hinge with 5/8 inch radius corners. Function family matches; corner profile does not, so the 1010RP suits a square routed mortise and the 3558 suits a radius one. The set count also differs, with the Ives supplied three to a box.

For an exterior opening the Delaney RH45 series is the closer fit: Delaney 4 inch by 4 inch bulk residential hinges for exterior use with 5/8 inch radius corners, sold in pairs and grouped as Exterior Residential Hinges. It keeps the same 5/8 inch radius corner profile the Orca 3558 uses, so the corner routing carries over, but the leaf steps up from 3.5 inch by 3.5 inch to 4 inch by 4 inch and the mortise has to be enlarged to suit. Delaney also lists a 4 inch by 4 inch Castlegate hinge in 5/8 inch radius by square if the door and jamb preps differ from each other.

The Deltana DSB35 is a 3-1/2 inch by 3-1/2 inch square hinge for residential use, sold in pairs, and Deltana also lists the DSB3 in a 3 inch by 3 inch square pattern. Both are square corner, where the Orca 3558 carries 5/8 inch radius corners at the same 3.5 inch by 3.5 inch leaf. If the doors on the property are already cut square, staying with the Deltana DSB35 keeps the prep consistent across the fleet; if some jambs are radius cut, the 3558 covers those without filling the corners.

The 3558 is a residential plain bearing hinge in a 3.5 inch by 3.5 inch radius corner pattern. Where the opening calls for a security hinge, the Deltana DE44R5TA is a 4 inch by 4 inch steel security hinge with 5/8 inch radius corners and TT, sold in pairs, and the Deltana CSB45N is a 4-1/2 inch by 4-1/2 inch square hinge with a non-removable pin. The DE44R5TA keeps the 5/8 inch radius corner profile in a larger 4 inch leaf; the CSB45N is square corner and larger again, so both change the mortise size from a 3-1/2 inch prep.

The Orca 3558 is ordered as an individual hinge, one per line, so a three-hinge door means a quantity of three. That is worth noting if you are cross-shopping, because several comparable residential hinges are packaged differently: the Delaney RH35 and the Emtek 91013 are sold as pairs, and the Schlage Residential S3P1010 comes as a pack of three.

For standardizing across units, the Orca 3558 covers a single 3.5 inch by 3.5 inch radius corner pattern in a long finish range including oil-rubbed bronze, satin nickel, matte black, polished chrome, satin chrome, bright brass, satin brass, satin stainless steel and white. Delaney's RH35 interior residential hinge matches the 3-1/2 inch by 3-1/2 inch size and 5/8 inch radius corners and is sold in bulk pairs, and Delaney's RH45 covers exterior openings at 4 inch by 4 inch with the same radius. Running the 3558 on interior doors keeps one finish family across the fleet; stepping up to 4 inch for entries changes the mortise size.