Ives 3CB1 3-Knuckle Concealed ...
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$95.50
$55.35
Ives Ives 3CB1 Brass/Stainless Steel 3 Knuckle, Concealed Bearing Full Mortise Hinge 3CB1-B

Ives 3CB1 3-Knuckle Concealed Bearing Full Mortise Hinge - Medium Duty Commercial Grade

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Model: 3CB1 4.5x4.5 626
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$55.35
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Ives 3CB1 3-Knuckle Concealed Bearing Full Mortise Hinge - Medium Duty Commercial Grade

Professional Full Mortise Hinge Solution

The Ives 3CB1 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. Featuring two concealed nylon bearings and 3-knuckle construction, this commercial-grade hinge is designed for use with door closers and meets ANSI/BHMA A156.1 performance standards. Available in brass and stainless steel substrates with square corner design.

Professional Features & Benefits

  • Medium Duty Load Capacity: Engineered for doors up to 150 lbs with medium frequency usage up to 400 cycles per day for reliable commercial applications.
  • Concealed Bearing Design: Two concealed nylon bearings provide smooth operation and extended service life for high-usage applications.
  • Door Closer Compatible: Specifically recommended for use with door closers to ensure proper operation and longevity.
  • Complete Fastener Package: Includes fasteners for both hollow metal and wood doors - 12-24 x 1/2" UFPHMS, 12 x 1-1/4" FPHWS, plus 10-24 x 1/2" UFPHMS, 10 x 1" FPHWS for 3.5x3.5 hinge sizes.
  • Dual Substrate Options: Available in brass substrate (most finishes) and stainless steel substrate (finishes 629 and 630) for material compatibility.
  • 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 wire configurations.
  • ANSI/BHMA Certified: Exceeds ANSI/BHMA A156.1 performance standards and meets A156.7 template hinge dimensions for code compliance.
  • UL Classified: UL Classified for windstorm rated assemblies (R37965) ensuring structural integrity in demanding 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: Brass, Stainless 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 3CB1 hinges deliver professional-grade reliability with concealed nylon bearing construction rated for medium duty commercial applications up to 400 cycles per day. Certified to exceed ANSI/BHMA A156.1 performance standards and UL Classified for windstorm rated assemblies, these hinges provide the dependable performance essential for demanding commercial environments. Complete with fasteners for both hollow metal and wood door installations.

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:
Brass, Stainless Steel
Department:
Door Hardware

Ives 3CB1 4.5x4.5 626 – Frequently Asked Questions

1) Will the Ives 3CB1 hinge hold up on a door with a closer on it?
Yes, and that's the application Ives calls out for the 3CB1. It's a medium duty hinge rated for doors up to 150 lbs at up to 400 cycles per day, with two concealed nylon bearings carrying the load, and Ives specifically recommends it for use with door closers. Where a plain bearing hinge will start to bind and wear once a closer is pulling the door shut all day, the concealed bearing is what handles that duty. If your opening is heavier than 150 lbs or busier than 400 cycles a day, step up to a heavy weight hinge instead.
2) What size Ives 3CB1 hinge do I need for a standard 1-3/4 inch commercial door?
The 3CB1 comes in six sizes: 3.5 x 3.5, 4 x 4, 4.5 x 4, 4.5 x 4.5, 5 x 4.5 and 5 x 5 inches. On a 1-3/4 inch thick commercial door, 4-1/2 x 4-1/2 is the usual pick, since hinge height is sized to door thickness and weight and 1-3/4 inch is the standard commercial thickness. The 3.5 x 3.5 belongs on thinner 1-3/8 inch interior doors. Go wider on the leaf (5 x 5, or 5 x 4.5) when trim or a deep frame reveal means the door has to clear something on swing. Easiest check: measure the existing hinge leaf, height first, then width open flat.
3) Will the Ives 3CB1 drop into an existing hinge mortise without recutting the door?
If the existing prep is a standard template mortise at a matching size, yes. The 3CB1 meets ANSI/BHMA A156.7 template hinge dimensions, which is the standard that fixes screw hole spacing and leaf geometry so hinges from different makers interchange in the same cutout. It's square corner, so it drops into a square cornered mortise. If your existing hinges have radiused corners, order the 3CB1 with the RC-1/4 or RC-5/8 rounded corner option to match a 1/4 inch or 5/8 inch radius mortise rather than squaring off the pocket.
4) Which finish of the Ives 3CB1 is stainless steel rather than brass?
Finishes 629 (bright stainless steel) and 630 (satin stainless steel) are on a stainless steel substrate. Every other finish offered, 605 bright brass, 606 satin brass, 612 satin bronze, 613 satin bronze oil-rubbed, 614 oxidized bronze, 619 satin nickel, 625 bright chrome and 626 satin chrome, is on a brass substrate. That matters on exterior openings, coastal sites and wash-down areas, where you want the stainless base metal rather than a plated brass one. 630 is the workhorse for commercial interiors matching satin stainless lever trim.
5) How do I keep someone from pulling the hinge pin on an out-swinging exterior door?
Order the 3CB1 with NRP, the non-removable pin option, which puts a set screw in the barrel that's inaccessible while the door is closed. Ives also offers a security stud (SH) option, an interlocking stud and hole across the leaves so the door can't be lifted out of the frame even if the pin is defeated. On any out-swing exterior or corridor door where the barrel is on the unsecured side, spec one or both. There's also a SEC option for security fasteners if exposed screw heads are a concern.
6) Can I run power through an Ives 3CB1 hinge for an electric strike or electrified lock?
Yes. The 3CB1 is available with concealed wire transfer in TW4, TW8 and TW12 configurations, giving you 4, 8 or 12 conductors passing from frame to door through the hinge barrel. Count your conductors before you order: a simple electric latch retraction lock may need 4, while a lock with request-to-exit and latch monitoring plus a card reader can eat 12. That electrified hinge goes in the top or second hinge position with the raceway prepped to match.
7) My door is heavier than 150 lbs. What should I use instead of the Ives 3CB1?
Don't force the 3CB1 onto it. Its rating stops at 150 lbs and 400 cycles per day, and an over-loaded medium duty hinge sags the door and throws the latch out of the strike. Heavy weight options ZenSupply carries include the Don-Jo HWBB84545 in 4-1/2 x 4-1/2 and the HWBB85045 in 5 x 4-1/2, both heavy duty full mortise ball bearing, and the Hager BB1168, a heavy duty full mortise ball bearing hinge available with non-removable pin. For a lead-lined or heavily abused opening, the BEST CB1969R is a concealed bearing heavy weight hinge with pivot reinforcement.
8) Does the Ives 3CB1 meet spec for a windstorm rated door assembly?
The 3CB1 is UL Classified for windstorm rated assemblies under file R37965, so it can be specified on a tested storm-rated opening. It also exceeds ANSI/BHMA A156.1 performance requirements and conforms to A156.7 template hinge dimensions. Confirm the hinge size and quantity called out in the specific tested assembly listing for your opening, since the assembly listing governs how many hinges and which size the door was tested with.
9) What is the closest equivalent to the Ives 3CB1 concealed bearing hinge from another brand?
The Hager 920 is the nearest match in construction type. It is a full mortise concealed bearing hinge rated medium duty, the same bearing style and duty level as the Ives 3CB1. The difference is knuckle count and material: the Hager 920 is a 2-knuckle steel hinge, while the 3CB1 is 3-knuckle with a brass or stainless steel substrate. If the opening was templated for a 3-knuckle barrel, that knuckle difference is the thing to check before swapping.
10) What hinge should I use instead of the 3CB1 on a heavy traffic exterior door with a large closer?
The 3CB1 is a medium duty hinge, so an opening that exceeds that calls for a heavy duty ball bearing hinge. The Don-Jo HWBB74545 in 4-1/2 x 4-1/2 and the HWBB75045 in 5 x 4-1/2 are both heavy weight full mortise ball bearing hinges rated heavy duty. The Hager BB1168 is another heavy duty full mortise ball bearing option and comes with a non-removable pin, which matters on an outswing exterior leaf where the barrel is reachable from outside.
11) For a detention or behavioral health opening, is the 3CB1 with security studs the right hinge?
The 3CB1 offers security studs (SH), non-removable pin (NRP) and security fasteners (SEC) on a medium duty commercial hinge. For a purpose-built detention opening, the BEST BB855 is a heavy-duty steel double weight concealed ball bearing prison hinge, and the Stanley double weight prison hinge in 5 x 6 is furnished with no holes and not swaged for custom frame prep. The Hager 990 STEEL is a full surface prison hinge in 3 x 4 with a welded tip, heavy duty - full surface rather than full mortise, so it mounts to the face of the door and frame instead of into a routed mortise.
12) The door needs to swing both directions - will the 3CB1 work?
No. The 3CB1 is a full mortise hinge, which carries a door swinging one direction on a fixed jamb. A double acting opening needs a pivot instead: the BEST DAP-3 is a heavy duty double acting pivot for commercial interior doors. Where the door must swing clear in an emergency, the BEST CB1969R is a concealed bearing heavy weight pivot-reinforced hinge, which keeps the concealed bearing function of the 3CB1 while adding pivot reinforcement.
13) Which hinge do I use if the frame is prepped for half mortise rather than full mortise?
The 3CB1 is a full mortise hinge, mortised into both the door and the frame. A frame prepped for half mortise takes a different leaf arrangement - the Hager 1129 is a half mortise plain bearing commercial hinge in 4-1/2 inch standard weight steel, rated heavy duty. Mortise type has to match the existing prep; size and finish will not make a full mortise hinge fit a half mortise opening.
14) I need power transfer plus a door position switch on one hinge - what are the options next to the 3CB1?
The 3CB1 carries wire in TW4, TW8 and TW12 configurations for power transfer, but position monitoring is a separate function. The Command Access ETM-CB70 is an energy transfer monitor hinge with door position sensing on a 3-knuckle steel base, rated medium duty. For a heavier opening, the Command Access ETM-BB68 is an energy transfer monitor hinge with an integrated door position switch, heavy duty, and the ETH-BB68 is a 5-knuckle heavy duty steel base energy transfer hinge without the monitor function.
15) Do Ives 3CB1 hinges come with screws for both hollow metal and wood doors?
Both sets ship in the box. Ives packs 12-24 x 1/2 inch undercut flat head machine screws and 12 x 1-1/4 inch flat head wood screws, plus 10-24 x 1/2 inch machine screws and 10 x 1 inch wood screws for the 3.5 x 3.5 size. So a hollow metal frame with a wood door, the common commercial combination, is covered without a separate fastener order. Nothing else is required to hang the hinge.
16) Is the Ives 3CB1 the right hinge for a hospital or behavioral health door?
Ives offers the 3CB1 with a hospital tip (HT), which replaces the flat button tip with an angled tip so the barrel gives nothing to tie a ligature or catch a gown or IV line on. That's the option to specify on patient room and behavioral health openings. Pair it with NRP on any out-swinging patient door. The 3CB1 itself is a medium duty hinge for doors to 150 lbs at 400 cycles a day, so if the opening is a busy ward corridor door taking heavier traffic than that, size up to a heavy weight hinge.
17) Can I use the Ives 3CB1 on interior doors in an apartment building or is it overkill?
It's a commercial hinge, and on multi-tenant residential that's usually the right call for corridor and unit entry doors, which see far more traffic than a bedroom door. For genuine interior residential doors, cheaper options fit better: the Schlage Residential S3P1010 in 3.5 x 3.5 square corner plain bearing comes three to a pack, one door's worth, and Delaney sells 3-1/2 x 3-1/2 bulk steel residential hinges with a 5/8 inch radius by the pair. The tradeoff is bearings and traffic rating: those are plain bearing, while the 3CB1's concealed nylon bearings are what let it run 400 cycles a day behind a closer.
18) Do I need to specify handing when ordering Ives 3CB1 hinges?
No. The 3CB1 is a standard full mortise hinge with a removable pin, so the same hinge works on a left hand or right hand door, you just flip it. Handing only enters the picture on a hinge built around a fixed feature, such as the Stanley Security three-knuckle concealed bearing electrified hinge, which is ordered left-handed with a 4-wire concealed conductor. If you order the 3CB1 with a wire transfer option (TW4, TW8, TW12), confirm the handing and hinge position for the raceway when you place that order.
19) I need an electrified hinge to pass power to a door lock. Is the Ives 3CB1 with wire transfer my only option?
No. Besides the 3CB1's TW4, TW8 and TW12 wire transfer options, ZenSupply carries purpose-built electrified hinges. The BEST CECB179-12C is a medium duty steel full mortise concealed bearing electrified hinge with a 12-wire quick connect, which saves you splicing conductors in the frame. Command Access ETH-CB70 is a medium duty 3-knuckle standard weight steel energy transfer hinge. If you also need to know whether the door is open, the Command Access ETM-CB70 is a medium duty 3-knuckle energy transfer hinge with door position sensing built in, so one part does power transfer and door status.
20) Is a plain bearing commercial hinge the same thing as the Ives 3CB1?
No. The 3CB1 uses concealed bearings and is recommended for doors carrying a closer. A plain bearing hinge such as the Orca Hardware 4040 in 4 x 4 square corner or the Orca 4014 in 4 x 4 with a 1/4 inch radius corner is also a medium duty commercial hinge, but the bearing function is plain rather than concealed. Where a closer is loading the top hinge, the bearing type is the spec that decides the swap, not the size or corner style.
21) Which commercial hinge matches the 3CB1 in square corner 4-1/2 inch size?
The 3CB1 is offered in 4.5 x 4.5 with square corners. The Orca Hardware 3535 series is a 4-1/2 x 4-1/2 square corner ball bearing commercial hinge, medium duty - same size and corner prep, ball bearing rather than concealed bearing. The Deltana CSB45N is a 4-1/2 x 4-1/2 square hinge sold in pairs with a non-removable pin. The McKinney SQ3331 is a 4-1/2 x 4-1/2 square barrel 2-knuckle decorative hinge, standard duty, which changes the barrel appearance from the 3CB1 3-knuckle profile.
22) I need the door to close itself without a closer - is there a hinge alternative to the 3CB1?
The 3CB1 is recommended for use with a door closer and does not self-close on its own. The Stanley 2060R spring hinge is a full mortise square corner hinge in 4.5 x 4.5 with a ferrous steel base, rated heavy duty, and provides the closing force from the hinge itself. It shares the full mortise square corner prep the 3CB1 uses in that size, which is what makes it a candidate on an existing opening.
23) Is there a non-ferrous alternative to the Ives 3CB1 for a coastal or wash-down opening?
The 3CB1 is available in a brass substrate for most finishes and a stainless steel substrate in 629 bright stainless and 630 satin stainless. The McKinney T2314 is a non-ferrous hinge, standard weight, 5 knuckle, rated medium duty - the same duty level as the 3CB1 with a different knuckle count. Match the substrate to the environment first, then confirm the knuckle profile against the other hinges on the opening.
24) For 3-1/2 inch openings, what else is available besides the 3CB1?
The 3CB1 is offered in 3.5 x 3.5 with square corners, and at that size ships with 10-24 x 1/2 inch UFPHMS machine screws and 10 x 1 inch FPHWS wood screws. Comparable 3-1/2 inch hinges include the Orca Hardware 3514 series, a 3.5 x 3.5 plain bearing commercial hinge with a 1/4 inch radius corner rated medium duty, and the Schlage Residential S3P1010, a 3.5 x 3.5 square corner plain bearing mortise hinge sold in packs of three, also medium duty. The Emtek 94013 is a heavy duty ball bearing hinge in 3-1/2 x 3-1/2 square corner plated steel, sold in pairs. The corner style is what determines whether an existing mortise accepts them.
How fast can I get the Ives 3CB1 4.5x4.5 626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 4.5x4.5 626 come with a warranty?
Absolutely. The Ives 3CB1 4.5x4.5 626 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 4.5x4.5 626?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Ives 3CB1 4.5x4.5 626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

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