BEST FBB138 Steel Half Mortise...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$58.09
BEST BEST FBB138 Steel Half Mortise Ball Bearing Heavy Weight Hinge With Removable Pin BEST-FBB138

BEST FBB138 Steel Half Mortise Ball Bearing Heavy Duty Hinge with Removable Pin

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Model: BEST-FBB138-600-4.5
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$58.09
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BEST FBB138 Steel Half Mortise Ball Bearing Heavy Duty Hinge with Removable Pin

Professional Heavy-Duty Hinge Solution for Commercial Applications

The BEST FBB138 is a steel half mortise ball bearing hinge engineered for heavy or high frequency hollow metal or wood doors hung on channel iron frames. This heavy-duty hinge features four permanently lubricated non-detachable ball bearings for smooth, reliable operation and reduced friction. The removable pin design facilitates easy installation and maintenance, while the reversible flush tips and pins provide installation flexibility for demanding commercial applications.

Professional Features & Benefits

  • Heavy-Duty Construction: Steel construction designed specifically for heavy or high frequency hollow metal or wood doors for exceptional durability in commercial environments.
  • Advanced Ball Bearing System: Four permanently lubricated non-detachable ball bearings ensure effortless movement and reduced friction for long-term smooth operation.
  • Removable Pin Design: Convenient removable pin facilitates easy installation and maintenance while maintaining secure operation.
  • Versatile Installation Options: Reversible flush tips and pins provide flexibility for various door and frame configurations.
  • Channel Iron Frame Compatibility: Specifically engineered for doors hung on channel iron frames for optimal performance in commercial applications.
  • Hospital Tip Option: Available with hospital tips (HT) for specialized healthcare facility requirements.
  • Premium Materials: Non-ferrous hinges feature stainless steel pins for enhanced corrosion resistance and longevity.

Technical Specifications

  • Bearing Type: Ball Bearing
  • Commercial/Residential: Commercial
  • Corner Style: Square Corners
  • Department: Door Hardware
  • Duty Level: Heavy Duty
  • Hinge Pin Type: Removable
  • Hinge Type: Half Mortise
  • Knuckles: 5
  • Product Category: Door Hinges and Pivots
  • Product Group: Door Hinges and Pivots
  • Product Model: FBB138
  • Product Subgroup: Surface and Mortise Hinges
  • Product Type: Half Surface Hinges
  • Series: Architectural Hinges
  • Subcategory: Hinges

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 BEST Quality?

BEST hinges deliver professional-grade reliability with steel construction and permanently lubricated ball bearing systems engineered for heavy-duty commercial applications. The FBB138 combines robust materials with precision engineering to ensure dependable performance where smooth operation and durability are essential. Designed specifically for high frequency use, this hinge provides the reliability demanded by commercial door applications.

Product Specs

Subcategory:
Hinges
Series:
Architectural Hinges
Hinge Type:
Half Mortise
Knuckles:
5
Bearing Type:
Ball Bearing
Corner Style:
Square Corners
Product Group:
Door Hinges and Pivots
Product Subgroup:
Surface and Mortise Hinges
Product Type:
Half Surface Hinges
Duty Level:
Heavy Duty
Commercial/Residential:
Commercial
Hinge Pin Type:
Removable
Product Model:
FBB138
Product Category:
Door Hinges and Pivots
Department:
Door Hardware

BEST BEST-FBB138-600-4.5 – Frequently Asked Questions

1) Is the BEST FBB138 heavy enough for a high traffic entrance or stairwell door?
It is a heavy duty, commercial-rated hinge with four permanently lubricated non-detachable ball bearings, specified for heavy or high frequency doors. That bearing count is what keeps a constantly cycled door swinging without drag. A plain bearing hinge like the Hager 1173 is medium duty and a better match for low traffic openings.
2) What should I order instead of the BEST FBB138 if my door has a standard full mortise frame prep?
The FBB138 is a half mortise hinge intended for doors hung on channel iron frames, so it will not drop into a standard hollow metal frame cut for a full mortise hinge. For that prep, the Hager 1191 is a full mortise 5 knuckle standard weight hinge, and the Hager 800 is a full mortise 3 knuckle standard weight hinge - both plain bearing and the 800 rated medium duty. Confirm frame prep and leaf size before substituting.
3) What is the closest half mortise ball bearing alternative to the BEST FBB138?
The Hager BB1109 is the nearest match in configuration: it is a half mortise ball bearing hinge with a 5 knuckle barrel, the same hinge type and knuckle count as the FBB138. The difference is weight class - the BB1109 is a standard weight, medium duty hinge, while the FBB138 is a heavy duty steel hinge built for heavy or high frequency hollow metal or wood doors on channel iron frames. For a high traffic opening, stay with the FBB138; for a lighter interior door in the same half mortise prep, the BB1109 covers it.
4) Can a Hager 1173 half surface hinge be used in place of a BEST FBB138?
No - they mount differently and the door prep is not the same. The FBB138 is a half mortise hinge, meaning one leaf mortises into the door edge while the other surface applies to the channel iron frame. The Hager 1173 is a half surface hinge, which reverses that relationship. The 1173 also uses plain bearings and is rated medium duty, where the FBB138 runs on permanently lubricated ball bearings at heavy duty. Match the mounting style to the existing prep before ordering either.
5) What size and finish does the BEST FBB138 half mortise hinge come in?
It is supplied 4-1/2 by 4-1/2 inches in 600, primed for painting. The primed finish is meant to be field painted to match the door or frame color, so it suits openings where the hinge gets painted out rather than left as a plated finish.
6) Does the FBB138 have square or radius corners?
Square corners. That matters for the door edge mortise: a square corner leaf drops into a routed square pocket, and it will not seat correctly in a prep cut for a 1/4 or 5/8 inch radius corner leaf without rework.
7) Can I take the door down without unscrewing the hinges?
Yes. The FBB138 uses a removable pin, so you pull the pins and lift the door off with the leaves still fastened. The tips and pins are also reversible, which gives you flexibility on how the hinge is oriented at install.
8) Will this hinge work on an exterior or wet-area opening?
The FBB138 itself is steel, primed for painting, which is intended for interior or protected commercial openings where the hinge gets painted. BEST's non-ferrous hinges are the ones supplied with stainless steel pins for corrosion resistance, so for a coastal or wash-down location look to a non-ferrous body rather than a primed steel one.
9) Is there a simpler non-bearing option than the BEST FBB138 for a low traffic door?
Yes. The FBB138 carries four permanently lubricated ball bearings for heavy or high frequency use; on a low traffic opening that is more hinge than the door needs. Plain bearing alternatives include the Hager 1173, a 4-1/2 inch half surface 5 knuckle medium duty hinge, and the Hager 800, a full mortise 3 knuckle standard weight medium duty hinge. Choose based on the mounting style your door and frame are already prepped for, since neither shares the FBB138 half mortise prep.
10) Is there a hospital tip version of this BEST hinge for a healthcare facility?
Hospital tips (HT) are offered on the FBB138. Hospital tips angle the tip so gurneys, IV poles and clothing cannot catch on the hinge, which is why healthcare and behavioral facilities specify them.
11) Where do I find the template and hole locations for installing the FBB138?
BEST publishes a hinge installation guide and a hinge size chart alongside the 5 knuckle ball bearing hinge catalog, and those carry the template and sizing detail you need to lay out the door edge mortise and the frame face screw pattern before you cut.
How fast can I get the BEST BEST-FBB138-600-4.5 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 BEST BEST-FBB138-600-4.5 come with a warranty?
Absolutely. The BEST BEST-FBB138-600-4.5 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 BEST BEST-FBB138-600-4.5?
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 BEST BEST-FBB138-600-4.5 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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