Deltana S35R4BB 3-1/2" x 3-1/2" x 1/4" Radius Hinge, Ball Bearing, Steel (Pair)

The S35R4BB is a 3-1/2 x 3-1/2 inch full mortise butt hinge with 1/4 inch radius corners, so it drops in only where the existing mortise was routed with a 1/4 inch radius. Pull one of your old hinges and look at the leaf corners. If they are square, this one will leave gaps at the corners and you want a square corner hinge in the same 3-1/2 x 3-1/2 size, like the Emtek 91013 or the Schlage Residential S3P1010. If the corners are a wider sweep, that is the common 5/8 inch radius and the Delaney 3-1/2 x 3-1/2 residential hinge is cut that way. Radius has to match or you are chiseling the pocket.

Not a good choice there. The S35R4BB is a residential-duty steel hinge and it does not use a non-removable pin, so on an out-swing door the barrel and pin sit on the outside where anyone can drive the pin out and lift the door off. Interior openings are what this hinge is built for. For an out-swing exterior or any opening where the hinges are exposed, order a hinge with NRP, such as the Hager BB1168 non-removable pin full mortise ball bearing hinge.

This one is built as a residential hinge, .085 inch steel with ball bearings, and that is where it belongs: apartments, houses, interior doors inside a unit. Corridor doors, lobby doors, and anything on a heavy door in a commercial building want a commercial-duty hinge instead. In the same 3-1/2 x 3-1/2 footprint with the same 1/4 inch radius corners, the Orca Hardware 3514 Series is a medium duty commercial hinge that drops into the identical mortise, though it runs plain bearing rather than ball bearing.

Not in the same prep. The Delaney 3-1/2 inch by 3-1/2 inch bulk steel residential interior hinges are the same nominal size and also sold by the pair, but they carry 5/8 inch radius corners, while the Deltana S35R4BB is cut with 1/4 inch radius corners. The corner radius has to match the router cut in the door and jamb, so 3-1/2 inch by 3-1/2 inch is only half the spec — measure the corner of the hinge coming out before ordering either one.

The Deltana S35R4BB is a standard pin hinge rather than an NRP hinge. When the door swings out and the barrel sits on the exposed side, the Hager BB1168 is the swap: a full mortise ball bearing hinge built with a non-removable pin and rated heavy duty. It keeps the same full mortise mounting and the same ball bearing pivot as the S35R4BB, with the pin secured so the leaves cannot be separated from the outside.

Step up a size — the Deltana S35R4BB is 3-1/2 inch by 3-1/2 inch and will not fill a 4 inch mortise. The Orca Hardware 4014 Series is a 4 inch by 4 inch hinge with the same 1/4 inch radius corners, in a plain bearing commercial hinge rated medium duty, so the corner cut still matches a radiused prep. If you want to keep the ball bearing pivot at 4 inch, the Delaney 4 inch by 4 inch commercial ball bearing hinge does that, but with square corners.

The Deltana S35R4BB is rated residential in steel. For a commercial opening, the Ives 3CB1 is a steel 3-knuckle concealed bearing full mortise hinge rated medium duty, and the Ives 3CB1HW is the heavy weight version of that same 3-knuckle concealed bearing full mortise hinge, rated heavy duty. Both mount full mortise the same way the S35R4BB does; the difference is that the bearing is concealed in the knuckle rather than the exposed ball bearing arrangement of the Deltana.

S35R4BB is sold by the pair, two hinges to a unit. A standard interior door at this hinge size normally hangs on three hinges, so plan on two packs per door and you will have one hinge left over. Two-hinge openings, common on lightweight closet and cabinet-style doors, take a single pack. If you are hanging a run of doors in an apartment or a house, buy in even pairs and count the spares in.

The bearings are what keep a heavier or busier door swinging quietly instead of squeaking and wearing the knuckles oval. The S35R4BB carries ball bearings between the knuckles, which is the upgrade over a plain bearing residential hinge like the Emtek 91013 or the Ives 1010RP, where the knuckles ride metal on metal. On a solid core bedroom or bath door, or any door that gets used dozens of times a day, the bearing version is the one to buy. On a light hollow core closet door that opens twice a week, a plain bearing hinge does the job.

Each pair ships with #9 x 3/4 inch wood screws. Those are for wood doors and wood jambs, which is what this hinge is meant for. A hollow metal frame is drilled and tapped for 12-24 machine screws, and the wood screws supplied here will not thread into it, so a steel frame opening needs machine screws sourced separately along with a hinge rated for that opening. In a wood jamb, contractors often swap the two long jamb-leaf screws for 3 inch screws that reach the stud, since 3/4 inch only bites the jamb itself.

No handing to call out. A full mortise butt hinge with a removable pin is symmetrical, so the same hinge works on a left hand or right hand door and the pin simply drops in from the top. Finish is the only choice you make on the S35R4BB. Handing only becomes a question on spring hinges, electrified hinges, and half mortise or half surface types.

The Deltana S35R4BB is a ball bearing hinge in 3-1/2 inch by 3-1/2 inch steel, sold as a pair, with bearings between the knuckles carrying the door weight. The Emtek 91013 is a residential plain bearing hinge in the same 3-1/2 inch by 3-1/2 inch size, also sold as a pair in plated steel, and the Emtek 92013 is the heavy duty plain bearing hinge at that same size and pair count; both run metal on metal in the knuckle instead. Both Emtek options have square corners, while the S35R4BB is cut with 1/4 inch radius corners.

The Deltana S35R4BB has a unit of measure of one pair, so a three-hinge door takes two units and leaves one hinge over. If you want the exact count in one unit, the Schlage Residential S3P1010 is a 3.5 inch by 3.5 inch mortise hinge sold as a pack of 3, and the Ives 1010RP is a steel residential hinge sold as a set of 3. Both of those are plain bearing with square corners, against the ball bearing and 1/4 inch radius corners of the S35R4BB, so check the mortise corners before you switch.

The Deltana S35R4BB is a mechanical ball bearing hinge with no conductor through the barrel. On an opening with an electrified lock or exit device, one hinge in the set is replaced with an energy transfer hinge and the rest stay conventional. The Command Access ETH-CB70 is a 3 knuckle standard weight energy transfer hinge on a steel base, and the ETH-BB68 is the 5 knuckle heavy duty energy transfer hinge in the ETH 5 Series. If the opening also needs door position monitoring, the ETM-CB70 adds door position sensing on the same 3 knuckle steel base.

No, the frame prep is different. The Deltana S35R4BB is a full mortise hinge, so both leaves recess into the door edge and into the jamb. The Hager 1129 is a half mortise plain bearing commercial hinge in 4-1/2 inch standard weight steel — one leaf mortises into the door and the other applies to the face of the frame, which is what rabbeted metal frames call for. Full mortise and half mortise are not swap-in alternatives for each other regardless of leaf size.

Move to a heavy weight leaf in a larger size. The Don-Jo HWBB74545 is a heavy weight full mortise ball bearing hinge at 4-1/2 inch by 4-1/2 inch in satin chrome, and the Don-Jo HWBB75045 is the 5 inch by 4-1/2 inch heavy weight full mortise ball bearing hinge in steel with a satin chrome finish. Both are rated heavy duty and keep the full mortise mounting and ball bearing pivot of the Deltana S35R4BB, at a leaf size the 3-1/2 inch by 3-1/2 inch prep will not accept without recutting.

Deltana steel hinges like the S35R4BB are described for indoor applications. Where the opening is exposed, the McKinney T2314 is a non ferrous standard weight 5 knuckle hinge, which takes the ferrous base out of the equation. If you want a residential hinge specified for exterior use in a 4 inch leaf, the Delaney 4 inch by 4 inch bulk residential exterior hinges come as a pair with 5/8 inch radius corners — a different corner cut from the 1/4 inch radius on the S35R4BB, so match that to the prep.

Ten finishes across the S35R4BB: Oil Rubbed Bronze, Polished Nickel, Brushed Nickel, Antique Nickel, Paint Black, Polished Chrome, Brushed Chrome, Polished Brass, Brushed Brass, and Antique Brass. That range covers most of what is already hanging in a building, so a property manager rehinging one unit can usually match the levers and stops on the rest without changing the whole floor. Pick the finish that matches the lever, not the strike plate, since strikes are often left in a different plating.

The leaf runs .085 inch thick. That is the depth your mortise needs to be routed to so the leaf sits flush with the door edge and the jamb face. If you are replacing hinges of a different gauge, a thinner old hinge means the new leaf stands proud and the door binds against the stop; a thicker old one leaves the leaf sunk and the door can hinge-bind at the knuckles. Test-fit one hinge and check the reveal before you drive screws in all three.