Cal-Royal BB454 Full Mortise, Standard Weight, Two Ball Bearing Hinge, 4 1/2" x 4" - Template - Box Of 3

The Cal-Royal BB454 is a standard-weight commercial ball bearing hinge sold in boxes of 3, sized for 4-1/2" × 4" template-prepared door and frame mortises. Two-ball-bearing construction (one set in the upper barrel, one set in the lower) for smooth operation under average commercial cycling. Five-knuckle full mortise design with a non-rising removable pin standard, plus NRP (Non-Removable Pin) optional finish variants for added security against pin pulling on outswinging exterior doors. .134 gauge steel, stainless steel, or brass body construction depending on finish ordered. Eight machined screw holes total (four per leaf) with all wood screws (#1-1/4 × 12) and machine screws (1/2 × 12-24) included in the box. Eleven finish options across the standard BHMA color range. Box of 3 covers one standard commercial door (top, middle, bottom hinge positions). 

About Cal-Royal and the BB454 Series Position

Cal-Royal Products is a U.S. commercial hardware manufacturer (headquartered in Los Angeles, in business since 1986) known for value-engineered architectural hardware that hits the same ANSI/BHMA grade specifications as premium-tier brands at a notably lower price point. Cal-Royal's hinge lineup competes directly with Hager BB1279, McKinney TA2714, Stanley FBB179, and Bommer 4-1/2" × 4" ball bearing hinges. The BB454 sits in the standard-weight category for average-frequency commercial service: office buildings, retail stores, schools (interior doors), light institutional applications, multi-family residential corridor doors, and any commercial opening where the door is opened roughly 200 to 600 times per day. Heavier-duty applications (high-traffic schools, hospitals, building entries with doors opening 1,000+ times daily) should specify Cal-Royal's heavy-weight ball bearing series instead. For lighter-duty interior residential or light commercial openings, the plain bearing series works at lower cost. For the broader Cal-Royal hinge lineup including all weights, sizes, and bearing configurations, see the Cal-Royal 5 Knuckle Ball Bearing category within Five Knuckle Ball Bearing under Commercial Hinges in Door Hinges.

BB454 Specifications

• Function: full mortise commercial ball bearing hinge for door-to-frame applications, standard weight rating

• Quantity: box of 3 (one door's worth of hinges in standard commercial 3-hinge configuration)

• Hinge size: 4-1/2" × 4" (4-1/2" door leaf height, 4" total open width)

• Knuckle configuration: 5-knuckle full mortise template prep

• Bearings: 2 ball bearings (one set upper barrel, one set lower)

• Gauge of metal: .134

• Number of holes: 8 total (4 per leaf)

• Hardware included: 1-1/4 × 12 wood screws and 1/2 × 12-24 machine screws (allows installation in either wood or hollow metal frames without separate ordering)

• Material options by finish: steel for plated finishes (USP, US1, US26D, US26, US3, US10A, US10B, US4), brass for solid brass finishes, stainless steel for US32D and US32DNRP variants

• ANSI/BHMA performance ratings: Brass A2112, Steel A8112, Stainless Steel A5111

• Pin: non-rising removable pin standard, NRP (Non-Removable Pin) optional in select finishes for added pin-pulling resistance

• Mortise prep: template prep (standardized cutout that matches industry frame and door routing)

• Compatible door weights: standard weight, average frequency commercial service

Available Finishes (Full BHMA Variant List)

The BB454 ships in 11 distinct finish/configuration combinations:

• USP - Prime Coat (base finish, ready for field paint)

• US1 - Flat Black Coated

• US4 - Satin Brass (BHMA 606)

• US26D - Satin Chrome (BHMA 626) - most-specified commercial finish

• US26DNRP - Satin Chrome with Non-Removable Pin (security-enhanced for outswinging exterior doors)

• US10A - Antique Bronze

• US10B - Oil Rubbed Bronze (BHMA 613) - popular for upscale commercial and contemporary residential

• US26 - Bright Chrome (BHMA 625)

• US3 - Bright Brass (BHMA 605)

• US32D - Satin Stainless Steel (BHMA 630) - corrosion-resistant for healthcare, food service, exterior coastal

• US32DNRP - Satin Stainless Steel with Non-Removable Pin (security + corrosion resistance combined)

When to Specify the BB454 (and When to Step Up or Down)

The BB454 is the right choice when three conditions align: the door is a standard-weight commercial door (typically 1-3/4" thick hollow metal or solid wood, weighing under 200 lbs), the opening sees average frequency cycling (200-600 daily uses), and the door prep is standard 4-1/2" × 4" template (the most common North American commercial door prep). Get any of those three wrong and the hinge will undersize for the application.

For exterior outswinging doors where security matters (the pin is exposed on the outside when the door is closed), specify the NRP variants (US26DNRP or US32DNRP) so the pin cannot be removed by an attacker without breaching the door first. For doors prepped with 5" × 4-1/2" mortises (heavier commercial), 4-1/2" × 4-1/2" mortises (some institutional applications), or 4" × 4" residential prep, this exact SKU won't fit - Cal-Royal makes alternate-sized BB-series equivalents in the same standard-weight grade. Verify the actual mortise dimension on existing doors before ordering replacements.

Comparable Alternatives in the Catalog

For direct comparison shopping across major brand alternatives in the 4-1/2" × 4" or comparable size, see Hager BB1279 4-1/2" × 4-1/2", Hager BB1279 4" × 4", Hager BB1191 4" × 4", Hager BB1191 4-1/2" × 4-1/2", and the NRP variants (Hager BB1191-NRP, Hager BB1279-NRP 4-1/2"). For specialty applications, the Hager HTBB1279 with Hospital Tip eliminates the pin-end exposure that catches IV poles or wheelchair handles, and the Hager RCBB1279 Round Corner handles round-corner door preparation common in older institutional construction.