Ives Steel 3-Knuckle Concealed...
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Ives Steel 3-Knuckle Concealed Bearing Full Mortise Hinge with Medium Duty Rating

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Model: 3CB1 4.5X4.5 652
$20.50
$12.51
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Ives Steel 3-Knuckle Concealed Bearing Full Mortise Hinge with Medium Duty Rating

Professional Medium-Duty Hinge Solution for Commercial Applications

The Ives Steel 3-Knuckle Concealed Bearing Full Mortise Hinge delivers reliable performance for medium weight doors up to 150 lbs with medium frequency usage up to 400 cycles per day. Engineered with two concealed nylon bearings for smooth operation and durability, this steel construction hinge is recommended for use with door closers and comes complete with fasteners for both hollow metal and wood door installations.

Professional Features & Benefits

  • Medium-Duty Load Capacity: Designed for doors up to 150 lbs with usage up to 400 cycles per day for reliable commercial performance.
  • Concealed Bearing Design: Features two concealed nylon bearings for smooth, quiet operation and extended service life in high-usage applications.
  • Heavy-Duty Steel Construction: Steel substrate provides exceptional durability and strength for demanding commercial environments.
  • Complete Fastener Package: Includes 12-24 x 1/2" UFPHMS and 12 x 1-1/4" FPHWS fasteners for hollow metal and wood doors, plus 10-24 x 1/2" UFPHMS and 10 x 1" FPHWS for 3.5x3.5 hinge sizes.
  • Door Closer Compatible: Specifically recommended for use with door closers for enhanced functionality and controlled door operation.
  • Extensive Customization Options: Available with hospital tip (HT), non-removable pin (NRP), security stud (SH), rounded corners (RC-1/4, RC-5/8), security fasteners (SEC), and electrification options including TW4, TW8, TW12, and monitor configurations.
  • ANSI/BHMA Certified: Exceeds ANSI/BHMA A156.1 performance standards and meets A156.7 template dimensions for code compliance and reliable performance.
  • UL Classified: UL Classified for windstorm rated assemblies (R37965) ensuring performance in demanding environmental conditions.

Technical Specifications

  • ANSI/BHMA: ANSI/BHMA A156.1
  • Bearing Type: Concealed Bearing
  • Commercial/Residential: Commercial
  • Corner Style: Square Corners
  • Department: Door Hardware
  • Duty Level: Medium Duty
  • Fasteners: Wood and Machine Screws
  • Knuckles: 3
  • Product Category: Door Hinges and Pivots
  • Product Function: Concealed Bearing
  • Product Group: Door Hinges and Pivots
  • Product Model: 3CB1
  • Product Subgroup: Full Mortise Hinges
  • Product Substrate: Steel
  • Product Type: Hinges
  • Subcategory: Hinges and Pivots

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and handing as applicable to this product.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces.
  3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions.
  4. Install all mounting hardware and secure the device to door and frame per manufacturer torque specifications.
  5. Adjust operational components for proper alignment, latching, and smooth operation throughout the full range of motion.
  6. Test device operation to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Ives Quality?

Ives architectural hinges deliver professional-grade reliability with steel construction and concealed bearing design tested to exceed ANSI/BHMA A156.1 performance standards. UL Classified for windstorm rated assemblies and engineered with two concealed nylon bearings for smooth operation up to 400 cycles per day. Engineered for demanding commercial applications where dependable performance and code compliance are essential.

Product Specs

Subcategory:
Hinges and Pivots
Knuckles:
3
Fasteners:
Wood and Machine Screws
Corner Style:
Square Corners
Product Group:
Door Hinges and Pivots
Product Subgroup:
Full Mortise Hinges
Product Type:
Hinges
ANSI/BHMA:
ANSI/BHMA A156.1
Duty Level:
Medium Duty
Commercial/Residential:
Commercial
Bearing Type:
Concealed Bearing
Product Model:
3CB1
Product Function:
Concealed Bearing
Product Category:
Door Hinges and Pivots
Product Substrate:
Steel
Department:
Door Hardware

Ives 3CB1 4.5X4.5 652 – Frequently Asked Questions

1) Will the Ives 3CB1 hinge hold a 150 lb commercial door?
That's exactly its ceiling. The 3CB1 is a medium duty hinge rated for doors up to 150 lbs at up to 400 cycles per day, running on two concealed nylon bearings. Heavier leaves or higher traffic than that call for a heavy weight hinge instead, such as the Don-Jo HWBB84545 in 4-1/2 x 4-1/2 or the Hager BB1168.
2) Does the Ives 3CB1 have square corners or radius corners?
Square corners as standard, which is what a hollow metal frame prep takes. Rounded corner leaves are available as an option in 1/4 inch (RC-1/4) and 5/8 inch (RC-5/8) radius if your door or frame is routed with a radius mortise. Check the existing mortise before you order, since a square leaf will not sit in a radiused pocket without rework.
3) Can I get the Ives 3CB1 hinge with a non-removable pin for an out-swinging exterior door?
Yes. NRP is an option on the 3CB1 and it's the right call any time the hinge barrel ends up on the outside of the opening, since it stops the pin being driven out. Security stud (SH) and security fasteners (SEC) are also available for the same reason. Hospital tip (HT) is offered where you need the tip to shed rather than catch, typical in healthcare corridors.
4) Does the Ives 3CB1 meet ANSI/BHMA requirements for a commercial spec?
It's certified to ANSI/BHMA A156.1 and meets A156.7 template dimensions, so it drops onto standard templated door and frame prep. It's also UL Classified for windstorm rated assemblies under R37965. That combination is what a facility spec or a code review typically asks for on a commercial opening.
5) Will an Ives 3CB1 drop into the existing hinge mortise on my hollow metal door?
If the opening was built to standard templated prep, yes. The 3CB1 meets ANSI/BHMA A156.7 template dimensions, which is the standard that governs hole pattern and leaf geometry on templated hinges, and Ives publishes the full template index so you can confirm the pattern before you cut. Two things to match: the leaf size (3.5 x 3.5 through 5 x 5) and the corner style, square as standard with 1/4 and 5/8 radius available.
6) Which hinge should I order instead of the Ives 3CB1 if I need to run power through the door?
The 3CB1 is available in electrification builds including TW4, TW8 and TW12 and monitor configurations. If you would rather buy a purpose-built electrified hinge, the BEST CECB179-12C is a steel full mortise concealed bearing electrified hinge with a 12-wire quick connect, rated medium duty. The Command Access ETH-CB70 is an energy transfer hinge with a 3 knuckle standard weight steel base, also medium duty, and the ETM-CB70 adds door position sensing in the same 3 knuckle steel base. Match the wire count to what the lock and access control head end require.
7) What is the closest equivalent to an Ives 3CB1 hinge from another brand?
The Ives 3CB1 is a steel full mortise hinge with a concealed bearing and 3 knuckles, rated medium duty. The Hager 920 is the nearest match in construction terms: it is a steel full mortise concealed bearing hinge, also medium duty, but built with 2 knuckles rather than 3. If the knuckle count matters for appearance across a run of doors, the 3CB1 and the Hager 920 will not look alike in the frame even though both carry a concealed bearing.
8) What hinge should I use instead of the Ives 3CB1 on a heavy door or a high-traffic opening?
The Ives 3CB1 is rated medium duty for doors up to 150 lbs and 400 cycles per day. For an opening beyond that, the Don-Jo HWBB84545 is a heavy weight full mortise ball bearing hinge in 4-1/2 by 4-1/2, and the Don-Jo HWBB85045 covers the same heavy duty rating in a 5 by 4-1/2 size for wider or heavier leaves. The Hager BB1168 is another heavy duty full mortise ball bearing option and comes with a non-removable pin, which the 3CB1 offers as a build option rather than as standard.
9) I need radius corner hinges, not square corner - what is the alternative to the Ives 3CB1?
The Ives 3CB1 is a square corner hinge. Frames prepped for radius corners need a matching hinge: the Orca Hardware 3514 Series is a 3-1/2 by 3-1/2 hinge with 1/4 inch radius corners and the Orca 4014 Series is the 4 by 4 with the same 1/4 inch radius, both medium duty commercial plain bearing hinges. For 5/8 inch radius pockets, the Deltana DE44R5TA is a 4 by 4 steel security hinge with a 5/8 inch radius. Confirm the radius already routed into the frame before ordering, since 1/4 and 5/8 are not interchangeable.
10) The frame is prepped for a half mortise hinge - can the Ives 3CB1 be used?
No. The 3CB1 is a full mortise hinge, meaning both leaves mortise into the door and the frame. A half mortise opening needs the Hager 1129, a half mortise plain bearing commercial hinge in 4-1/2 standard weight steel, rated heavy duty. For a full surface condition, the Hager 990 STEEL is a full surface prison hinge in 3 by 4 with a welded tip. Mortise style is set by the existing prep and cannot be changed by ordering a different size.
11) What ball bearing hinge matches the Ives 3CB1 in a 4-1/2 by 4-1/2 square corner?
The 3CB1 is built in 4.5 by 4.5 with square corners and a concealed bearing. If the specification calls for a ball bearing hinge in that same footprint, the Orca Hardware 3535 Series is a 4-1/2 by 4-1/2 square corner ball bearing commercial hinge rated medium duty, matching the 3CB1 on duty level. The Don-Jo HWBB74545 is the same 4-1/2 by 4-1/2 full mortise ball bearing footprint in satin chrome but is rated heavy duty. For a 4 by 4 square corner ball bearing leaf, the Delaney CH401X is a commercial ball bearing hinge with a square corner.
12) I want a non-removable pin hinge - do I have to order the Ives 3CB1 with the NRP option?
The 3CB1 can be ordered with the non-removable pin option, and it also offers a security stud and security fasteners. If you prefer a hinge supplied with NRP as part of the model, 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 with a non-removeable pin. The Deltana DE44R5TA is a 4 by 4 steel security hinge with a 5/8 inch radius. On an outswing exterior door the pin is exposed, which is what makes this a decision rather than a preference.
13) Do the Ives 3CB1 hinges come with screws for both hollow metal and wood doors?
Both sets ship in the box. You get 12-24 x 1/2 inch undercut flat phillips machine screws for the hollow metal frame and 12 x 1-1/4 inch flat phillips wood screws for the door. The 3.5 x 3.5 size uses the smaller pack, 10-24 x 1/2 inch machine screws and 10 x 1 inch wood screws. No separate fastener order needed.
14) What's the difference between a concealed bearing hinge and a ball bearing hinge?
Concealed bearing means the bearings sit inside the knuckles, so the barrel reads as a clean 3-knuckle line with no visible bearing races between the leaves. A ball bearing hinge shows those races. Functionally both carry a closer-equipped door; the concealed type is chosen where the barrel appearance matters or where exposed races would collect dirt. Ball bearing equivalents ZenSupply carries include the Orca 3535 Series 4-1/2 x 4-1/2 square corner and the Delaney CH401X 4 x 4 square corner.
15) I need to match the hinges to the levers and closers already on my building's doors. What finishes does the Ives 3CB1 come in?
Twelve finishes, so matching an existing fleet is usually straightforward: 600 primed for painting, 631 matte black, 632 bright brass, 633 satin brass, 639 satin bronze, 640 satin bronze dark, 641 oxidized bronze, 643E aged bronze, 646 satin nickel, 651 bright chrome, 652 satin chrome, and 695 dark bronze. 652 satin chrome and 630-family stainless looks are the usual commercial standard; 600 is the one to buy if the frames get painted out.
16) Is the Ives 3CB1 a residential hinge or is it rated for commercial traffic?
Commercial. Steel construction, concealed bearings, and a 400 cycle per day medium frequency rating put it in offices, schools, healthcare, retail and multi-tenant residential corridors. For interior residential doors with no closer, a plain bearing hinge like the Schlage Residential S3P1010 3.5 x 3.5 square corner or the Emtek 91013 residential pair is the lighter, simpler choice.
17) Are Ives 3CB1 hinges handed? Do I need to specify left or right?
A standard full mortise butt hinge like the 3CB1 is non-handed, so one part number covers a left or right hand door. Handing only becomes an ordering question on the electrified versions, where the wire exit side matters, and on specialty hinges such as the Stanley CECB1900R54L, which is sold as a left-handed 4-wire unit.
18) Is a plain bearing commercial hinge the same thing as the Ives 3CB1?
No. The Ives 3CB1 carries a concealed bearing, which uses two concealed nylon bearings and is recommended for doors hung with a closer. The Orca Hardware 4040 Series 4 by 4 square corner hinge and the Orca 4014 Series 4 by 4 with 1/4 inch radius corners are plain bearing hinges, also rated medium duty for commercial use. Both are commercial hinges in the same size range, but the bearing construction is different, so specify by bearing type rather than by size alone.
19) Can I use a residential hinge in place of the Ives 3CB1 on an interior door?
The Ives 3CB1 is a commercial hinge certified to ANSI/BHMA A156.1 with a concealed bearing. Residential-duty alternatives sold in pairs include the Emtek 91013, a residential plain bearing 3-1/2 by 3-1/2 square corner hinge in plated steel, and the Deltana DSB35, a 3-1/2 by 3-1/2 square residential hinge. The Schlage Residential S3P1010 is a 3-1/2 by 3-1/2 square corner plain bearing mortise hinge sold in packs of 3. These are plain bearing rather than concealed bearing, so on a door hung with a closer or in a corridor cycling all day, stay with the commercial concealed bearing build.
20) What is the difference between the Ives 3CB1 and a 5-knuckle hinge like the McKinney MPB79?
The Ives 3CB1 is a 3 knuckle concealed bearing hinge in steel. The McKinney MPB79 MacPro is a 5-knuckle standard weight hinge, and the McKinney MP79 MacPro is a 5-knuckle standard weight full mortise hinge. The Stanley FBB191 is a 5-knuckle full mortise standard weight hinge in 4.5 by 4.5. Knuckle count is visible in the finished opening, so where a building is being standardized on one look, order all leaves to the same knuckle count rather than mixing 3 and 5.
21) Does the Ives 3CB1 work on a detention or prison door?
No. The 3CB1 is a medium duty hinge for doors up to 150 lbs. Detention openings call for a purpose-built hinge: the BEST BB855 is a heavy-duty steel double weight concealed ball bearing prison hinge in the Detention Hardware series, the Stanley 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 3 by 4 full surface prison hinge with a welded tip, rated heavy duty. The Stanley unit ships unprepped, so the frame shop drills and swages to suit.
22) I need the door to self-close without a closer - is there an alternative to the Ives 3CB1?
The Ives 3CB1 is a standard bearing hinge and is recommended for use with a door closer, so it does not close the door on its own. Where a closer is not being installed, the Stanley 2060R is a full mortise spring hinge with square corners in 4.5 by 4.5 on a ferrous steel base, rated heavy duty, and it carries the closing force in the hinge itself. For a door that needs to swing both ways, the BEST DAP-3 is a heavy duty double acting pivot for commercial interior doors.
23) Is a steel hinge like the Ives 3CB1 the right choice for an exterior or coastal opening?
The Ives 3CB1 is a steel hinge, and it is UL Classified for windstorm rated assemblies. Where a non-ferrous base is wanted instead, the McKinney T2314 is a non ferrous standard weight 5 knuckle hinge, rated medium duty. The Don-Jo HWBB85045 is a heavy weight full mortise ball bearing hinge in 5 by 4-1/2 with a brass base in satin chrome. Base metal is the deciding factor here, not finish, since a plated steel hinge and a brass hinge can both be supplied in satin chrome.
24) Is there a concealed bearing electrified hinge with a handed 4-wire build rather than the Ives 3CB1 TW4?
The 3CB1 can be built with TW4 electrification. The Stanley CECB1900R54L is a three knuckle concealed bearing concealed conductor architectural hinge in steel full mortise, standard weight, 4-1/2 by 4-1/2, square corner, left-handed, 4-wire, rated heavy duty. It shares the 3 knuckle concealed bearing construction with the 3CB1 and the same square corner, and it is supplied handed, so confirm the swing of the opening before ordering.
25) Which hinge carries an integrated door position switch if the Ives 3CB1 monitor option is not right?
The 3CB1 is offered in monitor configurations. As dedicated alternatives, the Command Access ETM-BB68 is an energy transfer monitor hinge with an integrated door position switch, 5 knuckle heavy duty in the ETM 5 Series, and the ETM-CB70 provides door position sensing on a 3 knuckle steel base rated medium duty. The Command Access ETH-BB68 is a 5 knuckle heavy duty steel base energy transfer hinge without the monitoring function, so pick between them based on whether the access control panel needs door status back.
26) Can I get the Ives 3CB1 in a smaller size than 3.5 by 3.5?
The Ives 3CB1 starts at 3.5 by 3.5 and runs up through 4 by 4, 4.5 by 4, 4.5 by 4.5, 5 by 4.5 and 5 by 5. For a smaller leaf, the Deltana DSB3 is a 3 by 3 square hinge sold in pairs. Below 3.5 the choice moves away from the commercial concealed bearing build, so check the existing frame prep height before assuming the smaller leaf will cover the mortise.
27) Can I use bulk residential hinges on apartment interior doors instead of the Ives 3CB1?
On unit interior doors that are not on closers, bulk residential hinges are the usual answer: the Delaney RH35xx is a 3-1/2 by 3-1/2 bulk steel interior residential hinge with a 5/8 inch radius sold in pairs, and the Delaney RH45xx is the 4 by 4 bulk exterior residential hinge, also 5/8 inch radius. The Delaney RH40xx is a 4 by 4 Castlegate hinge in 5/8 inch radius by square. All three are 5/8 inch radius, while the Ives 3CB1 is square corner and commercial to ANSI/BHMA A156.1, so keep the 3CB1 on the corridor and stair doors where the closer and the cycle count live.
28) Which hinge handles a heavy door that also needs pivot reinforcement instead of the Ives 3CB1?
The Ives 3CB1 is medium duty for doors up to 150 lbs. For a heavy leaf where the top of the door needs pivot reinforcement, the BEST CB1969R is a concealed bearing heavy weight pivot-reinforced hinge, rated heavy duty. It keeps the concealed bearing construction the 3CB1 uses while carrying the heavier weight class.
29) How many Ives 3CB1 hinges do I need per door?
Standard practice on a commercial opening is three hinges per leaf up to 7 feet 6 inches of door height, adding one more for each additional 30 inches. Since the 3CB1 is sold as an individual hinge rather than a pair, order three per door on a typical opening. That matters when you're pricing out a floor of doors, because several of the residential alternatives are sold in pairs.
30) What is the difference between the Ives 3CB1 and the Emtek heavy duty hinge options?
The Ives 3CB1 is a commercial concealed bearing hinge certified to ANSI/BHMA A156.1. Emtek sells its 3-1/2 by 3-1/2 square corner plated steel hinges in pairs across three constructions: the 92013 heavy duty plain bearing, the 94013 heavy duty ball bearing, and the 96213 heavy duty hinge. The distinction between them is bearing construction, while the 3CB1 uses a concealed bearing with two nylon bearings. Where the specification names a bearing type, order to that word rather than to duty level alone.
31) Is a decorative square barrel hinge a substitute for the Ives 3CB1?
No. The McKinney SQ3331 is a square barrel 2-knuckle decorative hinge in 4-1/2 by 4-1/2, rated standard duty, and its barrel profile is chosen for appearance. The Ives 3CB1 is a 3 knuckle concealed bearing commercial hinge to ANSI/BHMA A156.1, rated medium duty for 400 cycles per day and recommended for doors on closers. The two share a size but not a service condition, so do not swap one for the other on a corridor or stairwell opening.
How fast can I get the Ives 3CB1 4.5X4.5 652 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Ives 3CB1 4.5X4.5 652 come with a warranty?
Absolutely. The Ives 3CB1 4.5X4.5 652 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Ives 3CB1 4.5X4.5 652?
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