Ives Steel 5-Knuckle Plain Bea...
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Ives Steel 5-Knuckle Plain Bearing Full Mortise Hinge with Square Corners

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Model: 5PB1 4.5x4.5 652
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Ives Steel 5-Knuckle Plain Bearing Full Mortise Hinge with Square Corners

Professional Full Mortise Hinge for Standard Weight Doors

The Ives Steel 5-Knuckle Plain Bearing Full Mortise Hinge delivers reliable performance for standard weight doors in low to medium frequency applications. This Grade 2 hinge features steel construction with square corners and 5-knuckle design for enhanced stability. Certified to exceed ANSI/BHMA A156.1 performance standards and meets ANSI/BHMA 156.7 template dimensions, this hinge provides dependable operation for commercial door applications.

Professional Features & Benefits

  • 5-Knuckle Design: Five knuckle configuration provides enhanced stability and load distribution for reliable door operation.
  • Grade 2 Performance Rating: Tested to 1,500,000 cycles for long-term reliability in medium-duty commercial applications.
  • Plain Bearing Construction: Steel plain bearing design optimized for standard weight doors and low to medium frequency usage applications.
  • Square Corner Profile: Traditional square corner design provides clean, professional appearance suitable for most architectural applications.
  • Complete Fastener Package: Includes wood and machine screws for both hollow metal and wood door installations (12-24 x 1/2" UFPHMS, 12 x 1-1/4" FPHWS, 10-24 x 1/2" UFPHMS, 10 x 1" FPHWS for 3.5x3.5 hinge size).
  • ANSI/BHMA Compliance: Certified to exceed ANSI/BHMA A156.1 performance standards and meets ANSI/BHMA 156.7 template dimensions for code compliance.
  • UL Classification: UL Classified for windstorm rated assemblies (R37965) ensuring performance in demanding weather conditions.
  • Customization Options: Available with hospital tip (HT), non-removable pin (NRP), security stud (SH), rounded corners (RC-1/4, RC-5/8), and security fasteners (SEC) for specialized applications.

Technical Specifications

  • ANSI/BHMA: ANSI/BHMA A156.1
  • Bearing Type: Plain Bearing
  • Commercial/Residential: Commercial
  • Corner Style: Square Corners
  • Department: Door Hardware
  • Duty Level: Medium Duty
  • Fasteners: Wood and Machine Screws
  • Grade: Grade 2
  • Knuckles: 5
  • Product Category: Door Hinges and Pivots
  • Product Function: Plain Bearing
  • Product Group: Door Hinges and Pivots
  • Product Model: 5PB1
  • 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 tested to exceed ANSI/BHMA A156.1 performance standards and rated for 1,500,000 cycles. UL Classified for windstorm rated assemblies and certified to meet ANSI/BHMA 156.7 template dimensions. Engineered for demanding commercial applications where dependable performance and code compliance are essential.

Product Specs

Subcategory:
Hinges and Pivots
Knuckles:
5
Grade:
Grade 2
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
Bearing Type:
Plain Bearing
Commercial/Residential:
Commercial
Product Model:
5PB1
Product Function:
Plain Bearing
Product Category:
Door Hinges and Pivots
Product Substrate:
Steel
Department:
Door Hardware

Ives 5PB1 4.5x4.5 652 – Frequently Asked Questions

1) Will an Ives 5PB1 drop into the hinge prep that is already cut in my door and frame?
It should, provided the existing prep is a square corner mortise in a matching size. The 5PB1 is built to ANSI/BHMA 156.7 template dimensions, so the leaf and hole pattern match standard commercial hinge templates rather than a proprietary layout. Order it in the size that matches what is coming out: 3.5 x 3.5, 4 x 4, 4.5 x 4, 4.5 x 4.5, or 5 x 4.5 inches. The one thing to check before you order is the corner. Square corners are standard on this hinge, so if your frame is routed with radius corners you need the RC-1/4 or RC-5/8 option instead.
2) Does the Ives 5PB1 meet a Grade 2 hinge spec on my drawings?
Yes. The 5PB1 is a Grade 2 hinge certified to exceed ANSI/BHMA A156.1 and tested to 1,500,000 cycles, which is what a Grade 2 line item on a commercial door schedule is asking for. It is also UL Classified for windstorm rated assemblies under R37965. For a facility standardizing across many openings, the same model covers five sizes and twelve finishes, so one part number and one submittal can carry a whole building.
3) I need a hinge on an out-swinging exterior door where the pin is reachable from outside. Can the 5PB1 be secured?
Yes, and you have to specify it. On an out-swing door the barrel sits on the exterior, so order the 5PB1 with the non-removable pin option (NRP) to stop the pin being driven out. Two more security options are offered on the same hinge: a security stud (SH), which is a projection on one leaf that engages the opposite leaf so the door cannot be lifted off even if the pin is defeated, and security fasteners (SEC) so the mounting screws cannot be backed out with a common driver. On an in-swing door with the barrel inside, none of the three are necessary.
4) The Ives 5PB1 is built for low to medium frequency doors. What goes on a high traffic opening instead?
Move from plain bearing to ball bearing. The Orca Hardware 4.5 inch by 4.5 inch Square Corner Ball Bearing Commercial Hinge, series 3535, keeps the square corner full mortise prep and medium duty rating but runs on ball bearings, and the Delaney CH401X is a 4 inch by 4 inch commercial ball bearing hinge with square corners. For a heavier leaf on top of the traffic, the Don-Jo HWBB74545 is a heavy weight full mortise ball bearing hinge at 4.5 inch by 4.5 inch in satin chrome, rated heavy duty. The Ives 5PB1 is a Grade 2 plain bearing hinge tested to 1,500,000 cycles and specified for standard weight doors in low to medium frequency use, so the deciding question is the door leaf weight and the cycle count the opening actually sees, not the size, since 4.5 by 4.5 is a size the 5PB1 also covers.
5) The door and frame are prepped with quarter inch radius corners. What plain bearing hinge fits instead of the square corner Ives 5PB1?
Two Orca Hardware hinges are cut for that prep: the 3.5 inch by 3.5 inch by 1/4 inch Radius Corner Plain Bearing Commercial Hinge, series 3514, and the 4 inch by 4 inch by 1/4 inch Radius Corner Plain Bearing Commercial Hinge, series 4014. Both are medium duty plain bearing commercial hinges, the same bearing type and duty level as the Ives 5PB1, so the only thing changing is the leaf corner. The 5PB1 is a square corner hinge as standard, but it is also offered with rounded corners as RC-1/4 and RC-5/8 options, so a radius prep can be answered either by moving to the Orca radius hinges or by ordering the 5PB1 in the RC-1/4 configuration. Confirm which radius the existing mortise was routed to before ordering, because 1/4 inch and 5/8 inch are not interchangeable in the pocket.
6) Can the Ives 5PB1 carry power through the door to an electrified lock?
No. The Ives 5PB1 is a mechanical plain bearing full mortise hinge in steel, with no conductor path through the barrel. An opening that has to feed power to an electrified lock or exit device needs a hinge built as a power transfer. The Command Access ETH-CB70 is an energy transfer hinge with a 3-knuckle standard weight steel base, rated medium duty in the ETH 3 series, and the ETH-BB68 is the 5-knuckle heavy duty version in the ETH 5 series. The BEST CECB179-12C is a steel full mortise concealed bearing electrified hinge with a 12-wire quick connect, rated medium duty. The Stanley CECB1900R54L is a three knuckle concealed bearing concealed conductor architectural hinge in steel full mortise, standard weight, 4.5 inch by 4.5 inch, square corner, left-handed, with 4 wires. Wire count and handing are the two things to confirm on any of these, since the Stanley is handed and the 5PB1 is not.
7) What hinge is a direct substitute for the Ives 5PB1 on a 4 inch by 4 inch square corner opening?
The Orca Hardware 4 inch by 4 inch Square Corner Plain Bearing Commercial Hinge, series 4040, lines up with the Ives 5PB1 on the four things that decide a swap at that size: full mortise plain bearing action, square corners, medium duty, and commercial use. The Ives 5PB1 is a steel 5-knuckle plain bearing full mortise hinge with square corners rated Grade 2 medium duty, and 4 inch by 4 inch sits inside its size range of 3.5 by 3.5, 4 by 4, 4.5 by 4, 4.5 by 4.5, and 5 by 4.5. A mortise already routed square at 4 inch by 4 inch takes either one without rework. Where they separate is finish coverage: the 5PB1 is offered in 12 architectural finishes running from 600 primed for painting through 631 matte black, 646 satin nickel, 652 satin chrome, and 695 dark bronze, so if the rest of the doors in the building are matched to a specific BHMA number, check that number first.
8) A 5 inch by 4.5 inch hinge is specified for a heavy door. How does the Ives 5PB1 compare with the heavy weight options at that size?
The Ives 5PB1 is offered at 5 inch by 4.5 inch, but it is a Grade 2 medium duty plain bearing hinge built for standard weight doors. If the leaf is heavy weight, the Don-Jo HWBB75045 is a heavy weight full mortise ball bearing hinge at 5 inch by 4.5 inch in steel with a satin chrome finish, rated heavy duty, and the Don-Jo HWBB85045 is the same 5 inch by 4.5 inch heavy weight full mortise ball bearing hinge in brass with a satin chrome finish. Same size, same full mortise prep, different bearing and different weight class. Weigh the door and count the leaves before choosing, because the size on the drawing does not by itself tell you which of the two the opening needs.
9) The outswing exterior door needs a pin that cannot be pulled. What are the choices next to the Ives 5PB1?
The Ives 5PB1 is offered with a non-removable pin as the NRP option, and also with a security stud as SH and security fasteners as SEC, so the security prep can be ordered on the hinge itself rather than substituted for. If a ball bearing hinge is wanted for the same opening, the Hager BB1168 is a non-removable pin full mortise ball bearing hinge rated heavy duty. Deltana offers two prepped options in the smaller sizes: the CSB45N 4.5 inch by 4.5 inch square hinge sold as a pair with a non-removable pin, and the DE44R5TA 4 inch by 4 inch by 5/8 inch radius security hinge with TT in steel, also a pair. Match the corner style to the existing mortise first, because the Deltana DE44R5TA is a 5/8 inch radius leaf while the 5PB1 and the CSB45N are square.
10) The frame will not take a mortised leaf. What replaces the Ives 5PB1 on that opening?
The Ives 5PB1 is a full mortise hinge, which means both leaves are mortised, one into the door edge and one into the frame rabbet. Where the frame cannot be routed, the Hager 1129 is a half mortise plain bearing commercial hinge in 4.5 inch standard weight steel, rated heavy duty with plain bearing function, and it mortises into the door while attaching to the face of the frame. It keeps the same plain bearing action as the 5PB1, so the swing feel is comparable and only the mounting changes. Check the frame face for clearance to the stop before committing, since a half mortise leaf sits proud of the frame where the 5PB1 leaf sits flush in the rabbet.
11) Do Ives 5PB1 hinges come with screws, and will they work on both hollow metal frames and wood doors?
Both types of screw are in the box. The 5PB1 ships with wood and machine screws so the same hinge covers a wood door and a hollow metal frame without a separate fastener order. On the 3.5 x 3.5 size the pack is 12-24 x 1/2 inch and 10-24 x 1/2 inch undercut flat head machine screws for the metal side, plus 12 x 1-1/4 inch and 10 x 1 inch flat head wood screws for the wood side. Machine screws need the frame tapped or already threaded, which hollow metal frames normally are.
12) How do I match new 5PB1 hinges to the finish already on my other doors?
Twelve finishes are offered on the Ives 5PB1: 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. Pull an existing hinge and read the BHMA number stamped on it, then order the same number. The two that come up most in commercial buildings are 652 satin chrome and 600, which arrives primed so you can paint it to the frame color.
13) Do I need a commercial hinge like the Ives 5PB1 for interior doors in an apartment unit?
Not necessarily. The 5PB1 is a commercial grade hinge, and on a bedroom or closet door inside a unit that is more hinge than the opening needs. For plain interior residential work, the Schlage Residential S3P1010 is a 3.5 x 3.5 square corner plain bearing mortise hinge sold three to a pack, which is one door's worth, and the Emtek 91013 is a residential duty plain bearing hinge in the same 3.5 x 3.5 square corner size sold in pairs. Where the 5PB1 earns its place in multi-family is the corridor, stair, and utility doors that see building-wide traffic and carry a Grade 2 spec.
14) Can the Ives 5PB1 be used on an exterior door in a windstorm rated opening?
Yes. The 5PB1 carries a UL Classification for windstorm rated assemblies under R37965, so it can be used where the door assembly has to hold up to windborne pressure. Two ordering notes for an exterior opening: pick a finish suited to the exposure, and if the door swings out, add the non-removable pin option (NRP) so the pin is not accessible from the outside.
15) The door has to close itself. Will the Ives 5PB1 do that, or is a different hinge needed?
The Ives 5PB1 is a plain bearing full mortise hinge with no closing mechanism in it, so a self-closing opening needs either a separate door closer or a spring hinge. The Stanley Security 2060R is a full mortise spring hinge with square corners at 4.5 inch by 4.5 inch on a ferrous steel base, rated heavy duty. It shares the square corner full mortise prep with the 5PB1 and 4.5 by 4.5 is one of the five sizes the 5PB1 is offered in, so the frame and door preparation carries across. The usual arrangement is spring hinges in some positions and plain bearing hinges in the rest, so confirm how many spring hinges the door leaf calls for before ordering the balance as 5PB1 units.
16) What other 5-knuckle full mortise standard weight hinges cover the same commercial doors as the Ives 5PB1?
The McKinney MP79 MacPro is a full mortise 5-knuckle standard weight hinge rated standard duty, and the McKinney MPB79 MacPro is also a 5-knuckle standard weight hinge at standard duty. The Stanley Security FBB191 is a 5-knuckle full mortise standard weight hinge at 4.5 inch by 4.5 inch. All three share the knuckle count and the full mortise mounting with the Ives 5PB1, which carries 5 knuckles, plain bearing action, square corners, and a Grade 2 rating certified to exceed ANSI/BHMA A156.1 with template dimensions to ANSI/BHMA 156.7. Where the 5PB1 differs is the range it is stocked across: five sizes from 3.5 by 3.5 to 5 by 4.5 and 12 finishes, against a fixed 4.5 by 4.5 on the Stanley FBB191.
17) Is there a 3.5 inch square corner plain bearing hinge equivalent to the Ives 5PB1 at that size?
The Schlage Residential S3P1010 is a 3.5 inch by 3.5 inch square corner plain bearing mortise hinge from the 1000 series, rated medium duty with plain bearing function, and it is packed three to a box. The Emtek 92013 is a heavy duty plain bearing hinge in 3.5 inch by 3.5 inch with square corners in plated steel, supplied as a pair. The Ives 5PB1 covers the same 3.5 inch by 3.5 inch size with the same plain bearing function, square corners, and medium duty rating, and it ships with the fastener package sized for that hinge: 12-24 by 1/2 inch and 10-24 by 1/2 inch machine screws plus 12 by 1-1/4 inch and 10 by 1 inch wood screws. Count how many hinges the job needs before ordering, since the Schlage comes three up and the Emtek comes in pairs while the Ives is specified per hinge.
18) Which hinge reports whether the door is open, and how is it different from the Ives 5PB1?
Door position sensing comes from a monitor hinge. The Command Access ETM-CB70 is an energy transfer monitor hinge with door position sensing on a 3-knuckle steel base, rated medium duty in the ETM 3 series, and the ETM-BB68 is an energy transfer monitor hinge with an integrated door position switch, rated heavy duty in the ETM 5 series. Both combine the power transfer path with the position signal in one hinge. The Ives 5PB1 is a mechanical 5-knuckle plain bearing full mortise hinge rated Grade 2 medium duty and does neither, so on an opening tied into access control the monitor hinge takes one hinge position and 5PB1 units can fill the remaining positions in the same square corner full mortise prep. Confirm the size the monitor hinge is furnished in matches the mortise the 5PB1 units are going into.
19) What is the lighter option for interior residential doors where a commercial hinge like the Ives 5PB1 is more than the door needs?
The Ives 5PB1 is a commercial Grade 2 hinge. For interior residential doors, the Emtek 91013 is a residential plain bearing hinge pair at 3.5 inch by 3.5 inch with square corners in plated steel, from the residential duty hinges series, and it keeps the same plain bearing function and square corner leaf as the 5PB1 in its smallest size. The Deltana DSB35 is a 3.5 inch by 3.5 inch residential square hinge sold as a pair and the DSB3 is the same square hinge in 3 inch by 3 inch. Delaney supplies bulk residential hinges in pairs with a 5/8 inch radius leaf: the 3.5 inch by 3.5 inch interior hinge, the 4 inch by 4 inch exterior hinge, and a 4 inch by 4 inch Castlegate hinge with a 5/8 inch radius by square combination. Check the corner of the existing mortise, because the Delaney and Emtek leaves are not the same profile.
20) The specification calls for a hinge with a non-ferrous base. Does the Ives 5PB1 meet that, and what does instead?
The Ives 5PB1 has a steel substrate, so it does not satisfy a non-ferrous base requirement. The McKinney T2314 is a non-ferrous hinge in standard weight with 5 knuckles, rated medium duty. It matches the 5PB1 on knuckle count and duty level, which means the visual line of the barrel and the class of door it suits stay the same while the base material changes. If the requirement is coming from the finish rather than the base metal, note that the 5PB1 in 632 bright brass, 633 satin brass, 639 satin bronze, and 652 satin chrome is described as a steel base carrying that finish, so a plated finish alone does not answer a non-ferrous callout.
21) How does the Hager 920 differ from the Ives 5PB1 if both are full mortise plain bearing hinges?
The knuckle count and the bearing arrangement. The Hager 920 is a full mortise concealed plain bearing hinge with 2-knuckle steel construction, rated medium duty with a concealed bearing function, so the bearing does not read on the barrel and the barrel itself shows two knuckles. The Ives 5PB1 has 5 knuckles with the plain bearing arrangement, square corners, and a Grade 2 rating. Both sit in the same medium duty commercial band, so the choice is usually driven by how the barrel is meant to look on the opening rather than by the door. If the driver is appearance alone, the McKinney SQ3331 is a square barrel 2-knuckle decorative hinge at 4.5 inch by 4.5 inch, rated standard duty, in a size the 5PB1 also covers.
22) What is the hospital tip option on the Ives 5PB1 for, and do I need it?
Hospital tip (HT) is an ordering option that replaces the flat button ends of the hinge barrel with an angled tip, so there is no ledge at the top or bottom of the barrel to catch a sleeve, an IV line, or a gurney rail. It is specified on patient room and corridor doors in healthcare and behavioral settings, and occasionally in schools. On a standard office or storage door it is money spent for nothing, so leave it off unless the facility standard calls for it.
23) Is a 5-knuckle hinge different from a 3-knuckle or 2-knuckle hinge, and does it matter which I use?
Five knuckles spread the door load over more points along the barrel than a two or three knuckle hinge, which is why 5-knuckle is the normal architectural pattern on full mortise commercial doors. The Ives 5PB1 is 5-knuckle steel. Knuckle count also changes the look, since the Hager 920 is a 2-knuckle concealed bearing hinge and the Command Access ETH-CB70 is 3-knuckle, and those barrels read differently on the frame. If you are replacing one hinge on a leaf, match the knuckle count of the others so the door does not look patched.
24) Can the Ives 5PB1 be used on a detention or correctional opening?
The Ives 5PB1 is a Grade 2 medium duty commercial hinge certified to exceed ANSI/BHMA A156.1, built for standard weight doors in low to medium frequency use. Detention openings are served by a different class of hinge. The BEST BB855 is a heavy-duty steel double weight concealed ball bearing prison hinge in the detention hardware series, the Stanley Security BB855 is a double weight prison hinge furnished with no holes and not swaged at 5 inch by 6 inch, and the Hager 990 STEEL is a full surface prison hinge at 3 inch by 4 inch with a welded tip, rated heavy duty. Note the Stanley comes unprepped, so hole pattern and swaging are done to suit the frame rather than arriving templated the way the 5PB1 does to ANSI/BHMA 156.7 dimensions.
25) The door swings both directions, or is heavy enough to need pivot support. Is the Ives 5PB1 the right part?
No. The Ives 5PB1 is a full mortise hinge, which hangs a door on one swing direction from the frame rabbet. For a door that swings both ways, the BEST DAP-3 is a heavy duty double acting pivot for commercial interior doors, from the emergency rescue hardware series. For a heavy leaf that needs the pivot load path but is still hung on hinges, the BEST CB1969R is a concealed bearing heavy weight pivot-reinforced hinge, rated heavy duty. Both are a different hanging method from the 5PB1, which is a Grade 2 medium duty plain bearing hinge for standard weight doors, so the floor and header preparation changes with them rather than just the hinge itself.
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Absolutely. The Ives 5PB1 4.5x4.5 652 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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